CRUISE REPORT

MARINE GEOLOGICAL CRUISE TO FJORDS IN TROMS AND NORTHERN

NORDLAND, NORWAY

R.V. Johan Ruud 22. -30. 4. 2003

by

Jan Sverre Laberg and

Matthias Forwick

DEPARTMENT OF GEOLOGY

UNIVERSITY OF TROMSØ

N-9037 TROMSØ, NORWAY

2

1. Introduction and scientific objectives

During the RV Johan Ruud cruise from the 22nd to the 30th of April 2003 high-resolution

seismic data was acquired from fjords in Northern Nordland and Troms Counties in Northern

Norway (Figs. 1 and 2, Table 1 and 2). The data will be studied as part of the Norwegian

Research Council-funded SPONCOM project. SPONCOM (Sedimentary Processes and

Palaeo-environment on Northern Continental Margins) is a strategic University project led by

Prof. Tore O. Vorren at the University of Tromsø. In more detail our activities will focus on

three main aspects:

1) The chronology and dynamics of the last glaciation-deglaciation in the Troms-

Lofoten area.

2) Processes and fluxes of fjord, continental shelf and –slope sedimentation.

3) Rapid paleoceanographic and palaeoclimatic changes, during the last glacial

maximum, the last deglaciation and Holocene.

The aims of the new seismic data is to elucidate the chronology and dynamics of the last

glaciation-deglaciation in the Vestfjorden – Ofotfjorden/Tysfjorden area by identifying

possible submarine glacigenic deposits that can be correlated with recessional moraines

previously identified on land, in particular the Skarpnes (Older Dryas) and Tromsø – Lyngen

(Younger Dryas) events (see Andersen, 1975; Olsen 2002). These data will also form the

basis for identifying core sites for an upcoming cruise by RV Jan Mayen (29.5 – 8.6 2003)

where some of the submarine glacigenic deposits will be cored for dating and

sedimentological studies.

The seismic data will also form the basis for identifying the deglaciation and Holocene

sediments in the fjords, their flux and processes of deposition and optimal core sites for

paleoceanographic and paleoclimatic studies.

3

2. Cruise participants

In addition to the regular crew of R/V Johan Ruud under Captain Anfinn Utheim the cruise

participants were:

Leg 1: 22nd – 27th of April

Jan Sverre Laberg, cruise leader, forsker, University of Tromsø

Gaute Mikalsen, forsker, University of Tromsø

Liv Plassen, Post. Doc., University of Tromsø

Steinar Iversen, science engineer, University of Tromsø

Leg 2: 27th – 30th of April

Matthias Forwick, cruise leader, Ph.d. student, University of Tromsø

Raymond Eilertsen, Post. Doc., University of Tromsø

Liv Plassen, Post. Doc., University of Tromsø

Steinar Iversen, science engineer, University of Tromsø

3. Cruise narrative

Tuesday April 22nd: Departure from Tromsø at about 10:00 (local time = GMT + 2:00 hours).

Cloudy and light breeze. Stopped after 0:30 hours for a successful life boat exercise. Then we

sailed for a box corer station in Malangen where we arrived at 12:00. At the position we

collected CTD-data and a bottom water sample, then we used a box corer for sea floor

sediment sampling. We tried three times to get a good sample. Then we sailed for the start of

our first seismic profile in Tjeldsundet (Fig. 1).

Seismic line 03JR270 started in Tjelsundet at about 21:00 and is running through Vestfjorden

ending at Værøy. In the southernmost part of Tjeldsundet and in inner Vestfjorden we are

passing several small sedimentary basins separated by bedrock highs.

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Wednesday, April 23rd: Partly cloudy, northerly breeze. We continued profiling in

Vestfjorden and the records were of good quality. The profile was oriented parallel but

slightly east of the central fjord axis, in the deepest part of the fjord basin (Fig. 1). The profile

was ended at about 22:00. The profile crossed east of an area in the fjord (at Værøy) where a

moraine ridge previously has been identified. This profile shows that the ridge is not

developed in the deepest part of the fjord basin. Then we had an onboard control of the

sparker and streamer, both were fine and we could prepare for start of the next seismic profile

(03JR271), this time across the fjord at Røsthavet (Fig. 1). The profile recorded several

acoustically transparent units probably comprising till and little overlying late glacial and

Holocene sediments except for in the deepest part of the fjord basin.

Thursday, April 24th: The weather was partly cloudy with breeze from the north in the outer

Vestfjorden, almost no wind further into the fjord. During the night we finished seismic

profile 271 and continued with profile 03JR272, the latter oriented parallel but slightly west

of the central fjord axis (Fig. 1). Also this profile was of good quality. In this area we were

recording several acoustically transparent seismic unit of relatively uniform thickness. These

units are inferred to be dominated by till. There are very little or no draping of late glacial or

Holocene hemipelagic sediments in this area. The next line, 03JR273 was oriented across the

fjord at Henningsvær (Fig. 1) and we reached the end of the line at about 23:00.

Friday, April 25th: A nice sunny day with light northerly breeze. During the night we did two

profiles oriented across the innermost part of Vestfjorden, lines 03JR274 and 275 (Fig. 1).

Both profiles were located across small but deep sedimentary basins. The quality of the data

was good but the recording length of line 275 may have been too low to register the deepest

part of the basin.

5

Then we started a seismic profile from the mouth of Ofotfjorden along the central fjord axis

to the innermost part (Fig. 1). Still using the Multi-electrode sparker and 3.5 kHz we got data

of good quality although noise due to side echoes locally disturbed the recordings. Sailing

into the fjord we crossed several sedimentary basins separated by highs. The highs may be of

bedrock or till origin, separating the two will be an important task for follow up studies. The

next line, 03JR277 is located along the central axis of Rombaken and Rombaksbotn (Fig. 1).

Reaching the end of the line we changed from the Multi-electrode sparker to the Boomer as

our seismic source and ran the same profile, this time sailing out of Rombaksbotn (Fig. 1).

We had some technical problems at the beginning of the line so we had to restart. Technical

problems also caused termination of the line slightly earlier than planned.

Saturday, April 26th: A nice day, partly cloudy with light breeze from the north. Our technical

problems were fixed prior to the start of the next line, 03JR279 running in to Skjomen and

terminating at Elvegård (Fig. 1). Also here we used Boomer as our source and the line was of

very good quality. Then we ran a Boomer and 3.5 kHz profile out of Ofotfjorden, at almost

the same positions as line 276 (Fig. 1). The positions are slightly adjusted to record along the

deepest part of the fjord basin that will register the thickest sediment succession and reduce

noise from side echoes. The line was ended in the afternoon and we sailed for the start

position of the next line, a profile through Tysfjorden ending at Hellemobotn (Fig. 1). Having

passed the fjord mouth we enter into the deepest part of the fjord where the water depth is in

excess of 700 m. The sea floor is almost flat with a thick succession of sediments below.

Sunday, April 27th: A nice and sunny day with almost no wind. We reached Hellemobotn

during the night; the line was terminated at about 04:00. In the inner part of the fjord we

passed several smaller basins separated by highs of till or bedrock origin. Locally side echoes

generated a lot of noise on the recordings. Seismic profile 03JR282, acquired in Gisundet

(Fig. 2), concluded the scientific work during Leg 1 and the vessel returned to Tromsø. After

partly change of the scientific crew (Laberg and Mikalsen disembarked, whereas Eilertsen

and Forwick embarked) and bunkering fresh water, we left Kræmerkaia in Tromsø at 21:30

6

(local time), heading north for Lyngen. The weather was good – almost cloudless, light

breeze, calm sea, c. +4ºC.

Monday, April 28th: We started seismic profiling in Lyngen, west of the island Uløy at 02:54,

continuing data acquisition performed in September 2002. The first profile (profile 03JR283)

was acquired in northern direction along the central axis of outer Lyngen and Fugløysundet

(Fig. 2). It was followed by an E-W transect north of the island Fugløy (profile 03JR284).

After that, we headed south, profiling in Fugløyfjorden (profile 03JR285). During acquisition

of this profile, we faced some technical problems with the streamer, i.e. it stopped data

reception in irregular intervals. This was caused by short circuit between a wire and metal

protection. The problem was solved shortly after appearance. Further problems did not

appear. Data acquisition was continued in southern Fugløyfjorden, along the eastern shore of

Store Skorøya and to Breivikeidet in Ullsfjorden (profile 03JR286). Throughout the rest of

the day, we acquired two additional cross profiles in Ullsfjorden (profiles 03JR287 and

profile 03JR288). In the fjords, the weather was generally good – little clouds, light breeze,

and calm sea. However around Fugløya, wind speed increased in periods to c. 15 m/s, and

waves were up to one meter high. Temperatures varied between c. 0ºC at night and c. 7ºC at

day.

Tuesday, April 29th: During this day, we acquired 19 cross profiles in Ullsfjorden – between

Breivikeidet and the northern tip of the Lyngen Peninsula (profiles 03JR289 to profile

03JR307; Fig. 2). Data acquisition was performed without any problems. However, during

acquisition of profile 03JR297, the boomer snag in a fish gear. We interrupted profiling in

order to remove the gear from the boomer. Data acquisition was continued along the planned

track with profile 03JR297B. Weather conditions during the day were very good. The

sky was almost cloudless, wind speed remained below 10 m/s and the sea was calm.

Temperature varied between about -0.5ºC in the early morning and c. +9.5ºC in the afternoon.

7

Wednesday, April 30th: One final seismic cross line concluded our work in the outer parts of

Ullsfjorden (profile 03JR308; Fig. 2). We steamed to Lyngen again, in order to acquire one

additional profile along the deepest part in the outer fjord (profile 03JR309). Data acquisition

was continued with one profile in Vannsundet (profile 03JR310) and concluded with profile

03JR311 through Langsundet. We arrived at Kræmerkaia in Tromsø at c. 13:00 and unloaded

the vessel. Also during this day, weather conditions were good – little clouds, light breeze,

calm sea and temperatures between -1ºC and +4ºC.

4. Geophysical and geological equipment

4.1. Seismic equipment

4.1.1 Multielectrode sparker (MES) (Figure 3)

The MES consists of 144 electrodes that operates at an energy level of 700 – 800 J. The

sound wave is generated by rapid heating of the electrodes creating a wave that propagates

through the water coloumn and into the underlying sediments. The MES operates to a water

depth up to 700 m.

4.1.2 Boomer (Figure 4)

The Boomer is a system that generates sound waves through electrically induced movement

of metal sheets. The Boomer operates to a water depth of up to 700 m.

4.1.3 Streamer (Figure 5)

A Benthos MESH 25/50P streamer with a total length of 50 m was used. The active part of

the streamer (containing hydrophones) is 7 m long. The sound wave is recorded by the

hydrophones, the signal from each hydrophone is summed and continues to the receiver.

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4.2 3.5 Hz Echo sounder

3,5 kHz Echosounder records have been acquired simultanously to airgun profiling. The

principal aims are: (1) to image the morphology of the ocean floor and its shallow subbottom

sedimentary layers and structures and (2) to select sediment core stations.

4.3 Onboard analogue and digital recording (see Table 1 and 2 for more details)

Onboard the data were recorded analogue on an EPC 9800 Recorder. In addition, the raw data

was stored on hard disk using a Delph2 recording/processing unit on a Windows-based PC.

4.4 Geological equipment (Figure 6)

The small box corer was used for present day sea floor sediment sampling.

5. Preliminary results

5.1 Vestfjorden-Tysfjorden/Ofotfjorden

In the inner part of Vestfjorden several sediment accumulations with a positive relief on the

present sea floor were identified. Compared with the depth to the sea floor on the distal side,

the innermost sediment accumulation is up to 30 m high (Fig. 7). In cross-section the

uppermost part has an acoustically transparent internal seismic signature; the lower part is

acoustically laminated. On the distal side, dipping internal reflections are seen (Fig. 7). The

next sediment accumulation is up to 40 meter high compared with the depth to the sea floor

on the distal side, the inner seismic signature is mainly acoustically transparent and the distal

front is relatively steeply dipping (Fig. 8). The third accumulation (Fig. 9) shows south-

westward dipping internal reflections and is up to 20 m high.

Well defined sediment accumulations on the present sea floor were also crossed in some of

the inner fjords. The accumulation in Rombaken, in innermost Ofotfjorden, is acoustically

laminated with a steeply dipping distal side and is up to 60 m high (Figure 10). This sediment

accumulation was dated to 9300 +/- 120 14C years BP by Andersen (1975). Preliminary

studies also indicate that there is a similar sediment accumulation across Tysfjorden at

Musken (Fig. 11).

9

So far, no isopack maps showing the late glacial and Holocene sediment thickness in the

studied fjords have been produced. But based on the preliminary results from this cruise the

overall impression is that there is little late glacial glacimarine and Holocene sediments in

Vestfjorden except for some smaller basins in the eastern and innermost parts of the fjord. In

Ofotfjorden and Tysfjorden the thickness is much higher. The reasons for this difference is

not known at present but it may be related to climatic conditions controlling melt water

production, the speed of the ice recession from the area, the number and duration of ice sheet

halts and/or readvances in the fjord basins. To try to answer these questions will be an

important part of our following-up work in the SPONCOM project.

5.2 Fjords north of Tromsø, Troms County

A selection of four seismic profiles (3.5 kHz) is shown representatively for the collected data

during the second leg of the cruise to the fjords north of Tromsø, Troms County (for location

of these sections see fig. 12). The quality of the acquired seismic data is generally good.

However, around the island Fugløy, increased wave activity caused uneven reflection

surfaces.

On most 3.5 kHz profiles, a ghost reflection on the sea bottom occurs (Figs. 13 - 15). This

reflection occurs predominantly on horizontal surfaces and slopes dipping in the moving

direction of the vessel. In single cases, the ghost reflection also occurs on slopes dipping

opposite to the moving direction of the vessel (Fig. 15). A striking fact is that the ghost

reflection appears to be absent in “shallower” areas (compare Fig. 16 with Figs. 13 - 15). The

reason for the occurrence of this ghost reflection is not known. It might be caused by “noise”

from the Boomer.

Two sedimentary environments can be distinguished on the high-resolution seismic profiles.

Whereas thick sediment packages (up to 100 ms) occur in the deeper parts of the fjords (Figs.

13 and 15), sediment cover is rather thin in shallower fjord areas (Fig. 14) and in the sounds

(Fig. 16). However, between irregularities on the seafloor (either basement or boulders?),

limited sediment accumulation occurs (Fig. 16).

10

One coring site with high potential for reconstructing the deglaciation history and

investigating the development of the sedimentary environment was observed close to the

northwestern end of seismic profiles 03JR309 (Fig. 15). At that site, marked reflections that

can be traced over large areas of Ullsfjorden appear close to the sea floor.

6. References

Andersen, B.G. 1975: Glacial geology of Northern Nordland, north Norway. Norges

Geologiske Undersøkelse 320, 1-74.

Olsen, L. 2002: Mid and Late Weichselian, ice-sheet fluctuations northwest of the Svartisen

glacier, Nordland, northern Norway. Norges Geologiske Undesøkelse Bulletin 440, 39-52.

11

12

Fig. 2: Acoustic line map of leg 2 of the cruise.

13

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3.5k

Hz

/ Spa

rker

10kW

/ 80

0J3k

Hz/3

00H

z5k

Hz/1

.5kH

z16

012

5/25

0Ea

st /

Righ

t1s

4R

omba

kken

,cou

rsec

hang

e"

03JR

278

19:3

668

d24.

8317

d50.

0719

:45

68d2

4.82

17d4

8.57

Boom

er30

0J50

0Hz

2kHz

150

250

Wes

t / L

eft

1s4

Rom

bakk

en,c

ours

echa

nge,

end

of li

ne"

"19

:45

68d2

4.82

17d4

8.57

20:1

368

d26.

0917

d44.

92Bo

omer

300J

500H

z2k

Hz15

025

0W

est /

Lef

t1s

4R

omba

kken

, end

of l

ine

""

20:1

368

d26.

0917

d44.

9220

:24

68d2

6.53

17d4

3.38

Boom

er30

0J50

0Hz

2kHz

150

250

Wes

t / L

eft

1s4

Rom

bakk

en,c

ours

echa

nge

""

20:2

468

d26.

5317

d43.

3820

:38

68d2

6.43

17d4

1.44

Boom

er30

0J50

0Hz

2kHz

150

250

Wes

t / L

eft

1s4

Rom

bakk

en,c

ours

echa

nge

""

20:3

868

d26.

4317

d41.

4420

:51

68d2

7.05

17d4

0.08

Boom

er30

0J50

0Hz

2kHz

150

250

Wes

t / L

eft

1s4

Rom

bakk

en,c

ours

echa

nge

""

20:5

168

d27.

0517

d40.

0822

:23

68d2

7.58

17d2

3.00

Boom

er30

0J50

0Hz

2kHz

150

250

Wes

t / L

eft

1s4

Rom

bakk

en,c

ours

echa

nge,

end

of li

ne"

03JR

279

23:2

868

d26.

7217

d05.

9401

:12

68d2

1.11

17d1

5.85

3.5k

Hz

/ Boo

mer

7kW

/ 30

0J3k

Hz/5

00H

z5k

Hz/2

kHz

150

250/

250

Sout

hEas

t / R

ight

1s4

Ofo

ten

26.4

"01

:12

68d2

1.11

17d1

5.85

01:3

368

d19.

6617

d14.

993.

5kH

z / B

oom

er7k

W /

300J

3kHz

/500

Hz

5kHz

/2kH

z15

025

0/25

0So

uthE

ast /

Rig

ht1s

4Sk

jom

en, c

ours

echa

nge

""

01:3

368

d19.

6617

d14.

9901

:45

68d1

8.85

17d1

5.54

3.5k

Hz

/ Boo

mer

7kW

/ 30

0J3k

Hz/5

00H

z5k

Hz/2

kHz

150

250/

250

Sout

hEas

t / R

ight

1s4

Skjo

men

, cou

rsec

hang

e"

"01

:45

68d1

8.85

17d1

5.54

02:3

968

d15.

9617

d22.

943.

5kH

z / B

oom

er7k

W /

300J

3kHz

/500

Hz

5kHz

/2kH

z15

025

0/25

0So

uthE

ast /

Rig

ht1s

4Sk

jom

en, c

ours

echa

nge,

end

of l

ine

"03

JR28

005

:22

68d3

1.53

17d3

1.55

06:4

768

d27.

5217

d20.

163.

5kH

z / B

oom

er7k

W /

300J

3kHz

/500

Hz

5kHz

/2kH

z15

025

0/25

0W

est /

Lef

t1s

4O

fote

n"

03JR

280B

07:1

368

d27.

6217

d20.

0708

:11

68d2

5.84

17d1

0.32

63.

5kH

z / B

oom

er7k

W /

300J

3kHz

/500

Hz

5kHz

/2kH

z15

025

0/25

0W

est /

Lef

t1s

4O

fote

n"

"08

:11

68d2

5.84

17d1

0.32

609

:38

68d2

5.61

16d5

3.97

73.

5kH

z / B

oom

er7k

W /

300J

3kHz

/500

Hz

5kHz

/2kH

z15

025

0/25

0W

est /

Lef

t1s

4O

fote

n, c

ours

echa

nge

""

09:3

868

d25.

6116

d53.

977

10:5

068

d26.

308

16d4

0.94

3.5k

Hz

/ Boo

mer

7kW

/ 30

0J3k

Hz/5

00H

z5k

Hz/2

kHz

150

250/

250

Wes

t / L

eft

1s4

Ofo

ten,

cou

rsec

hang

e"

"10

:50

68d2

6.30

816

d40.

9410

:58

68d2

6.39

16d3

9.26

3.5k

Hz

/ Boo

mer

7kW

/ 30

0J3k

Hz/5

00H

z5k

Hz/2

kHz

150

250/

250

Wes

t / L

eft

1s4

Ofo

ten,

cou

rsec

hang

e, e

nd o

f lin

e"

03JR

280C

11:1

068

d26.

3516

d40.

109

12:0

268

d25.

4116

d30.

183.

5kH

z / B

oom

er7k

W /

300J

3kHz

/500

Hz

5kHz

/2kH

z15

025

0/25

0W

est /

Lef

t1s

4O

fote

n"

"12

:02

68d2

5.41

16d3

0.18

13:4

068

d22.

595

16d1

2.31

3.5k

Hz

/ Boo

mer

7kW

/ 30

0J3k

Hz/5

00H

z5k

Hz/2

kHz

150

250/

250

Wes

t / L

eft

1s4

Ofo

ten,

cou

rsec

hang

e"

"13

:40

68d2

2.59

516

d12.

3114

:47

68d2

2.69

16d0

0.26

3.5k

Hz

/ Boo

mer

7kW

/ 30

0J3k

Hz/5

00H

z5k

Hz/2

kHz

150

250/

250

Wes

t / L

eft

1s4

Ofo

ten,

cou

rsec

hang

e, e

nd o

f lin

e"

03JR

281

15:2

968

d20.

9715

d51.

0817

:40

68d1

5.36

716

d07.

749

3.5k

Hz

/ Boo

mer

7kW

/ 30

0J3k

Hz/5

00H

z5k

Hz/2

kHz

150

250/

250

Sout

h / R

ight

1,5s

4Ty

sfjo

rd"

"17

:40

68d1

5.36

716

d07.

749

19:0

568

d10.

217

16d1

1.80

73.

5kH

z / B

oom

er7k

W /

300J

3kHz

/500

Hz

5kHz

/2kH

z15

025

0/25

0So

uth

/ Rig

ht1,

5s4

Tysf

jord

,cou

rsec

hang

e"

"19

:05

68d1

0.21

716

d11.

807

20:1

968

d05.

3516

d09.

763.

5kH

z / B

oom

er7k

W /

300J

3kHz

/500

Hz

5kHz

/2kH

z15

025

0/25

0So

uth

/ Rig

ht1,

5s4

Tysf

jord

,cou

rsec

hang

e"

"19

:25

68d0

8.92

16d1

1.24

7x

xx

3.5k

Hz

/ Boo

mer

7kW

/ 30

0J3k

Hz/3

00H

z5k

Hz/2

kHz

150

250/

250

Sout

h / R

ight

1,5s

4Ty

sfjo

rd (1

9:25

low

filter

300

Hz)

""

20:1

968

d05.

3516

d09.

7620

:52

68d0

3.41

16d0

6.76

93.

5kH

z / B

oom

er7k

W /

300J

3kHz

/300

Hz

5kHz

/2kH

z15

025

0/25

0So

uth

/ Rig

ht1,

5s4

Tysf

jord

,cou

rsec

hang

e"

"20

:52

68d0

3.41

16d0

6.76

921

:23

68d0

1.93

916

d10.

296

3.5k

Hz

/ Boo

mer

7kW

/ 30

0J3k

Hz/3

00H

z5k

Hz/2

kHz

150

250/

250

Sout

h / R

ight

1,5s

4Ty

sfjo

rd,c

ours

echa

nge

""

21:0

968

d02.

596

16d0

8.53

xx

x3.

5kH

z / B

oom

er7k

W /

300J

3kHz

/500

Hz

5kHz

/2kH

z15

025

0/25

0So

uth

/ Rig

ht1,

5s4

Tysf

jord

(19:

25 lo

wfilt

er 5

00H

z)"

"21

:23

68d0

1.93

916

d10.

296

22:2

567

d58.

216

16d1

4.93

3.5k

Hz

/ Boo

mer

7kW

/ 30

0J3k

Hz/5

00H

z5k

Hz/2

kHz

150

250/

250

Sout

h / R

ight

1,5s

4Ty

sfjo

rd,c

ours

echa

nge

""

22:2

567

d58.

216

16d1

4.93

23:0

167

d55.

8216

d14.

263.

5kH

z / B

oom

er7k

W /

300J

3kHz

/500

Hz

5kHz

/2kH

z15

025

0/25

0So

uth

/ Rig

ht1,

5s4

Tysf

jord

,cou

rsec

hang

e"

"23

:01

67d5

5.82

16d1

4.26

23:2

767

d54.

139

16d1

2.99

3.5k

Hz

/ Boo

mer

7kW

/ 30

0J3k

Hz/5

00H

z5k

Hz/2

kHz

150

250/

250

Sout

h / R

ight

1,5s

4Ty

sfjo

rd,c

ours

echa

nge

""

23:2

767

d54.

139

16d1

2.99

22:3

467

d53.

7816

d13.

673.

5kH

z / B

oom

er7k

W /

300J

3kHz

/500

Hz

5kHz

/2kH

z15

025

0/25

0So

uth

/ Rig

ht1,

5s4

Tysf

jord

,cou

rsec

hang

e"

"22

:34

67d5

3.78

16d1

3.67

23:4

567

d53.

9216

d15.

377

3.5k

Hz

/ Boo

mer

7kW

/ 30

0J3k

Hz/5

00H

z5k

Hz/2

kHz

150

250/

250

Sout

h / R

ight

1,5s

4Ty

sfjo

rd,c

ours

echa

nge

""

23:4

567

d53.

9216

d15.

377

00:0

467

d53.

1816

d17.

793.

5kH

z / B

oom

er7k

W /

300J

3kHz

/500

Hz

5kHz

/2kH

z15

025

0/25

0So

uth

/ Rig

ht1,

5s4

Tysf

jord

,cou

rsec

hang

e"

"00

:04

67d5

3.18

16d1

7.79

00:4

067

d51.

628

16d2

3.82

3.5k

Hz

/ Boo

mer

7kW

/ 30

0J3k

Hz/5

00H

z5k

Hz/2

kHz

150

250/

250

Sout

h / R

ight

1,5s

4Ty

sfjo

rd,c

ours

echa

nge

27.4

"00

:40

67d5

1.62

816

d23.

8200

:59

67d5

0.31

716

d25.

583.

5kH

z / B

oom

er7k

W /

300J

3kHz

/500

Hz

5kHz

/2kH

z15

025

0/25

0So

uth

/ Rig

ht1,

5s4

Tysf

jord

,cou

rsec

hang

e"

"00

:59

67d5

0.31

716

d25.

5801

:05

67d4

9.98

16d2

6.46

73.

5kH

z / B

oom

er7k

W /

300J

3kHz

/500

Hz

5kHz

/2kH

z15

025

0/25

0So

uth

/ Rig

ht1,

5s4

Tysf

jord

,cou

rsec

hang

e"

"01

:05

67d4

9.98

16d2

6.46

701

:15

67d4

9.50

916

d28.

113.

5kH

z / B

oom

er7k

W /

300J

3kHz

/500

Hz

5kHz

/2kH

z15

025

0/25

0So

uth

/ Rig

ht1,

5s4

GPS

pos

ition

s m

issin

g"

"01

:17

67d4

9.40

16d2

8.42

01:2

367

d49.

149

16d2

9.60

3.5k

Hz

/ Boo

mer

7kW

/ 30

0J3k

Hz/5

00H

z5k

Hz/2

kHz

150

250/

250

Sout

h / R

ight

1,5s

4Ty

sfjo

rd,c

ours

echa

nge,

end

of l

ine

Univ

ersi

tete

t i T

rom

sø, I

nstit

utt f

or g

eolo

gi

Tabl

e 1

14

Univ

ersi

tete

t i T

rom

sø, I

nstit

utt f

or g

eolo

giVe

ssel

: Joh

an R

uud

Are

a: G

isun

d; U

llsfjo

rd; L

ynge

nD

ate:

27-

30ap

ril 2

003

Set

tings

for g

raph

ic p

lotte

rD

ate

Prof

ileSt

art

Lat

Lon

Stop

Lat

Lon

Sour

ce1/

Sour

ce2

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gy1/

Filte

r low

Filte

r hig

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irect

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UTC

ED50

ED50

UTC

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gy2

sour

ce1/

2So

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1/2

pr in

chm

sSw

eep

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rate

ms

spee

d27

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03JR

282

11:4

169

d07.

5317

d36.

6913

:59

69d1

2.27

18d0

0.91

3.5k

Hz

/ Boo

mer

10kW

/ 30

0J3k

Hz/5

00H

z5k

Hz/2

kHz

150

125/

249

Nor

thEa

st /

Righ

t75

0G

isun

det

28.4

03JR

283

00:5

469

d53.

5320

d27.

58x

xx

3.5k

Hz

/ Boo

mer

10kW

/ 30

0J3k

Hz/5

00H

z5k

Hz/2

kHz

150

125/

250

Nor

th /

Left

800

4Ly

ngen

/ Fu

glysund

""

03:0

670

d01.

7520

d16.

79x

xx

3.5k

Hz

/ Boo

mer

10kW

/ 30

0J3k

Hz/5

00H

z5k

Hz/2

kHz

150

125/

250

Nor

th /

Left

800

4C

hang

e 3.

5kH

z fro

m 4

to 2

pul

ses

""

03:1

570

d02.

2920

d16.

07x

xx

3.5k

Hz

/ Boo

mer

10kW

/ 30

0J3k

Hz/5

00H

z5k

Hz/2

kHz

150

125/

250

Nor

th /

Left

800

4C

hang

e 3.

5kH

z fro

m 2

to 4

pul

ses

""

03:4

170

d04.

0120

d13.

97x

xx

3.5k

Hz

/ Boo

mer

10kW

/ 30

0J3k

Hz/5

00H

z5k

Hz/2

kHz

150

125/

250

Nor

th /

Left

800

4C

ours

echa

nge

""

06:1

470

d16.

1420

d22.

56x

xx

3.5k

Hz

/ Boo

mer

10kW

/ 30

0J3k

Hz/3

00H

z5k

Hz/2

kHz

150

125/

250

Nor

th /

Left

800

4C

hang

e Bo

omer

filte

r fro

m 5

00 to

300

""

06:2

570

d15.

1520

d21.

82x

xx

3.5k

Hz

/ Boo

mer

10kW

/ 30

0J3k

Hz/5

00H

z5k

Hz/2

kHz

150

125/

250

Nor

th /

Left

800

4C

hang

e Bo

omer

filte

r fro

m 3

00 to

500

""

xx

x07

:19

70d1

8.62

20d2

4.37

3.5k

Hz

/ Boo

mer

10kW

/ 30

0J3k

Hz/5

00H

z5k

Hz/2

kHz

150

125/

250

Nor

th /

Left

800

4En

d of

line

"03

JR28

407

:25

70d1

8.63

20d2

4.57

09:1

670

d19.

8620

d02.

353.

5kH

z / B

oom

er10

kW /

300J

3kHz

/500

Hz

5kHz

/2kH

z15

012

5/25

0W

est /

Lef

t80

04

Fugl

ysund"

03JR

285

09:2

570

d19.

9220

d02.

4110

:43

70d1

4.73

19d5

8.87

3.5k

Hz

/ Boo

mer

10kW

/ 30

0J3k

Hz/5

00H

z5k

Hz/2

kHz

150

125/

250

Sout

h / R

ight

800

4Fu

glyfjord; problems with streamer

"03

JR28

611

:17

70d1

4.86

19d5

7.86

xx

x3.

5kH

z / B

oom

er10

kW /

300J

3kHz

/500

Hz

5kHz

/2kH

z15

012

5/25

0So

uth

/ Rig

ht80

04

Fugl

yfjord / Ullsfjord"

"13

:08

70d0

7.98

20d0

8.07

xx

x3.

5kH

z / B

oom

er10

kW /

300J

3kHz

/500

Hz

5kHz

/2kH

z15

012

5/25

0So

uth

/ Rig

ht80

04

Cou

rsec

hang

e"

"13

:44

70d0

6.77

20d1

4.53

xx

x3.

5kH

z / B

oom

er10

kW /

300J

3kHz

/500

Hz

5kHz

/2kH

z15

012

5/25

0So

uth

/ Rig

ht80

04

Cou

rsec

hang

e"

"15

:08

70d0

1.12

20d1

3.29

xx

x3.

5kH

z / B

oom

er10

kW /

300J

3kHz

/500

Hz

5kHz

/2kH

z15

012

5/25

0So

uth

/ Rig

ht80

04

Cou

rsec

hang

e"

"16

:42

69d5

5.56

20d0

2.94

xx

x3.

5kH

z / B

oom

er10

kW /

300J

3kHz

/500

Hz

5kHz

/2kH

z15

012

5/25

0So

uth

/ Rig

ht80

04

Cou

rsec

hang

e"

"20

:22

69d4

1.90

19d4

3.41

xx

x3.

5kH

z / B

oom

er10

kW /

300J

3kHz

/500

Hz

5kHz

/2kH

z15

012

5/25

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uth

/ Rig

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04

Cou

rsec

hang

e"

"x

xx

20:4

269

d40.

5119

d43.

593.

5kH

z / B

oom

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Hz

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z15

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uth

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04

End

of li

ne"

03JR

287

20:5

769

d41.

0419

d45.

7121

:22

69d4

0.99

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0.52

3.5k

Hz

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mer

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0J3k

Hz/5

00H

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Hz/2

kHz

150

125/

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Wes

t / L

eft

800

4U

llsfjo

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03JR

288

21:3

769

d41.

8219

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5422

:06

69d4

1.78

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Hz

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mer

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0J3k

Hz/5

00H

z5k

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kHz

150

125/

250

East

/ Ri

ght

800

4U

llsfjo

rd29

.403

JR28

922

:22

69d4

2.63

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7.21

22:5

369

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173.

5kH

z / B

oom

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Hz

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z15

012

5/25

0W

est /

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t80

04

Ulls

fjord

"03

JR29

023

:08

69d4

3.45

19d4

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869

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163.

5kH

z / B

oom

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z15

012

5/25

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st /

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04

Ulls

fjord

"03

JR29

123

:53

69d4

4.27

19d4

9.91

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z / B

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z15

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5/25

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est /

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04

Ulls

fjord

"03

JR29

200

:44

69d4

5.05

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1.23

01:2

769

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oom

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Ulls

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"03

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301

:42

69d4

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Ulls

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"03

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402

:29

69d4

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"03

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503

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Ulls

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"03

JR29

604

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Ulls

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"03

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705

:28

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"03

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807

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299

08:3

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301

12:0

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213

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03JR

303

14:5

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416

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03JR

305

18:0

069

d55.

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d06.

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:18

69d5

5.81

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150

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"03

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619

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03JR

307

21:1

569

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7.51

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308

23:0

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8.42

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150

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Ulls

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"03

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901

:21

69d5

5.96

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3.98

xx

x3.

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z / B

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z15

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orth

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ngen

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02:1

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d00.

4720

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02x

xx

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Hz

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mer

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Hz/5

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Hz/2

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150

125/

250

Nor

th /

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800

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rsec

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"x

xx

03:2

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oom

er10

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ft80

04-

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d of

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"03

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004

:19

70d0

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05:5

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est /

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03JR

311

06:0

270

d03.

6419

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51x

xx

3.5k

Hz

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mer

10kW

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Hz/2

kHz

150

125/

250

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ight

800

4-5

Lang

sund

""

06:5

170

d00.

0319

d42.

13x

xx

3.5k

Hz

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mer

10kW

/ 30

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Hz/5

00H

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Hz/2

kHz

150

125/

250

Sout

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ight

800

4-5

Cou

rsec

hang

e"

"07

:11

69d5

8.41

19d4

1.20

xx

x3.

5kH

z / B

oom

er10

kW /

300J

3kHz

/500

Hz

5kHz

/2kH

z15

012

5/25

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uth/

Rig

ht80

04-

5C

ours

echa

nge

""

08:0

369

d55.

6719

d31.

74x

xx

3.5k

Hz

/ Boo

mer

10kW

/ 30

0J3k

Hz/5

00H

z5k

Hz/2

kHz

150

125/

250

Sout

h/ R

ight

800

4-5

Cou

rsec

hang

e"

"09

:01

69d5

1.53

19d2

4.48

xx

x3.

5kH

z / B

oom

er10

kW /

300J

3kHz

/500

Hz

5kHz

/2kH

z15

012

5/25

0So

uth/

Rig

ht80

04-

5C

ours

echa

nge

""

xx

x09

:47

69d4

7.87

19d2

1.67

3.5k

Hz

/ Boo

mer

10kW

/ 30

0J3k

Hz/5

00H

z5k

Hz/2

kHz

150

125/

250

Sout

h/ R

ight

800

4-5

End

of li

ne

Tabl

e 2

15

Fig.

3: T

he M

ultie

lect

rode

Spa

rker

use

d on

this

cru

ise.

16

Fig.

4: T

he B

oom

er u

sed

on th

is c

ruis

e.

17

Fig. 5: The Benthos MESH 25/50P streamer.

18

Fig. 6: The Boxcorer.

19

20

21

22

23

24

Fig.12: Location of the seismic sections shown on Figs. 13-16.

25

Fig. 13: Section of seismic profile 03JR294 from inner part of Ullsfjorden. See fig 12 for location.

26

Fig.

14:

Sec

tion

of se

ismic

pro

file

03JR

306

from

the

oute

r par

t of U

llsfjo

rden

. See

Fig

. 12

for l

ocat

ion.

27

Fig. 15: Section of seismic profile 03JR309 from Fugløyfjord. See Fig. 12 for location.

28

Fig.

16:

Sec

tion

of se

ismic

pro

file 0

3JR3

11 fr

om V

anns

unde

t. Se

e Fi

g. 1

2 fo

r loc

atio

n.