LOW GRADE URANIUM DEPOSITS OF INDIA

Dr. ANJAN CHAKI, DIRECTORAtomic Minerals Directorate for Exploration & Research

Department of Atomic Energy,GOVERNMENT OF INDIA

PREVIEW

• Uranium Provinces of India• Characterisation of Indian uranium deposits• Thrust areas of uranium exploration• Cuddapah uranium province, Southern India• Tummalapalle uranium deposit• Uranium deposits around Rohil, NW India• Uranium deposits of Central India• Other potential areas

� Uranium exploration in India dates back from late forties and the first uranium deposit (vein type) was discovered at Jaduguda in 1951 in the Singhbhum Shear Zone (SSZ) Jharkhand, which has now been proved as an important uranium province with a number of low grade, small to medium size uranium deposits. � Subsequently, number of new uranium deposits were discovered in other parts of the country (Rajasthan, Andhra Pradesh, Karnataka, Chhattisgarh, Meghalaya, etc.)

Uranium Exploration

4

(6)(6)

Distribution of Uranium DepositsSTATE GEOLOGICAL SETUP DEPOSIT TYPE EXAMPLES

Jharkhand Singhbhum Shear Zone(Paleoproterozoic)

Vein Type Jaduguda, Bhatin, Narwapahar, Turamdih

Andhra Pradesh

Cuddapah Basin(Proterozoic)

Unconformity Type

Lambapur, Peddagattu, Chitrial, Koppunuru

Stratabound Type

Tummalapalle-Rachakuntapalle

Rajasthan Aravalli & Delhi Supergroups (Paleo- Mesoproterozoic) Vein Type Umra- Udaisagar &

Rohil- GhateshwarKarnataka Bhima Basin

(Neoproterozoic) Vein Type Gogi, Gulburga districtChhattisgarh Dongargarh Shear Zone &

North Surguja Shear Zone(Paleo- Mesoproterozoic)

Vein Type Bodal, Bhandaritola & Jajawal, Dumhat

Meghalaya Mahadek Basin(Cretaceous) Sandstone

TypeDomiasiat, Wahkyn, Tyrnai, Gomaghat, Lostoin, Phlangdiloin

DEPOSITTYPE

LOW GRADEDEPOSITS

GEOLOGY HOST ROCK MINERALOGY

Vein

Jaduguda and Surroundings

SSZ in Singhbhum Group of rocks

Quartz chlorite schist (granular)

Uraninite, Brannerite

Bodal and Bhandaritola Nandgaon Group Amphybolite &

Quartz porphyryUraninite, Pitch-blende, Coffinite

Jajawal-Dumhat

Quartzo-feldspathic rock of North Surguja Shear Zone - Do-

Rohil Delhi Supergroup Albitites Pitchblende, Uraninite, CoffiniteUmra Aravalli

Supergroup Carbon phyllite

Strata-bound Tummalapalle Chitravati Group Dolostone Pitchblende,

Coffinite

Uncon-formity

Lambapur, Peddagattu and Chitrial

Srisailam Quartzite (Cuddapah Supgr.)

Unconformity of Granite & Srisailam quartzite

Uraninite, Pitch-blende, Kasolite

Koppunuru Palnad sub-basin (Kurnool Group)

Granite & Bangana-palle quartzite

Uraninite, Pitchblende

Sandstone Domiasiat-Wahkyn, etc

Lower Mahadek Formation

Feldspathic sandstone

Pitchblende, Coffinite

Characterisation of Uranium deposits

Thrust Areas for Low Grade Uranium Exploration in India(A) Paleoproterozoic Singhbhum Shear Zone, Jharkhand(B) Meso- Neoproterozoic Cuddapah and Kurnool

Basins, Andhra Pradesh(C) Proterozoic Aravalli and Delhi Basins, Rajasthan(D) Paleoproterozoic Dongargarh and North Surguja

Shear Zone, Chhattisgarh(E) Neoproterozoic Bhima and Kaladgi Basins, Karnataka(F) Paleoproterozoic Dharwar (QPC), Karnataka(G) Cretaceous Sedimentary Basin, Meghalaya(H) Meso- Neoproterozoic Chhattisgarh and Indravati

Basins, Chhattisgarh

Cuddapah Basin, Andhra Pradesh� Crescent shaped Paleo to Neoproterozoic Cuddapah and Kurnool basins are spread over 44,500 km2 area.� The Cuddapah Basin has evolved through a series of tectonic & thermal events and the formation of sub-basins viz. Papaghani / Chitravati, Nallamalai, Srisailam, Kurnool and Palnad with major overlap. � The basement Archean gneisses / Dharwar meta-sedimentaries are thrusted over Cuddapah Supergroup rocks on the eastern margin of the basin while the basin has an unconformable contact with the basement crystalline rocks in the west. � Two main types of uranium deposits have been identified in the Cuddapah basin. These are unconformity related and stratabound type.

�Total Area 44,500 sq km

�Thickness of the sediments ~ 12 Km

�Known unconformity related U-deposits(Northern Cuddapah)

�Known stratabound carbonate hosted U-deposits (Southern Cuddapah)

�Known fracture controlled granite hosted U-deposits

GEOLOGICAL MAP OF CUDDAPAH BASIN SHOWING URANIUM DEPOSITS AND OCCURENCES

9

PeddagattuChitrial

R.V. Tanda

Unconformity-related deposits (Northern Cuddapah)� Evaluation and exploratory drilling at Lambapur,

Peddagattu and Chitrial explored unconformity between the Basement Granitoids and the overlying Srisailam quartzite (Srisailam sub- basin) and medium tonnage, low grade deposits have been established. � A small, low grade deposit has also been

established around Koppunuru at the unconformity between Basement Granitoids and overlying quartzite of Banganapalle Formation (Palnad sub-basin) of Kurnool Group.� Surveys indicated uranium occurrences in

Basement Granitoids and overlying Banganapalle Formation (Palnad sub- basin) around Rallavagu Tanda, Damarcherla and Mathampalle.

Geological map of northern part of Cuddapah Basin

12

URANIUM MINERALISATION IN VEMPALLE FORMATION

1900m Thick

Cherty Limestone

Purple ShaleUraniferous DolostoneConglomeratesMassive Limestones

KURNOOLSCUMBUM SHALEBAIRENKONDA QURTZITEBASIC SILL/FLOWSGANDIKOTA QUARTZITETADPATRI SHALEPULIVENDLA QUARTZITEVEMPALLE FORMATIONGULCHERUVU QUARTZITEGNEISSES/DHARWARSU-MINERALIZATION IN VEMPALLE LIMESTONEU-MINERALIZATION IN QUARTZITEU-MINERALIZATION IN FRACTURE/FAULT ZONE IN GRANITE BASMENT

GEOLOGICAL MAP OF PARTS OF CUDDAPAH BASIN SHOWING URANIUM OCCURRENCES

14°

78° 00' 78° 30' 79° 00'20 Km 10 0 20 Km

78° 00' 78° 30'

MULAPALLE

KADAPA

MADDIMADUGU

PRODDATUR

GANDIKOTA

TADPATRIREDDIPALLE

AMBAKAPALLE

PARNAPALLE

RAYACHOTI

KADIRI

14°

14°

15°

30'14°30'

15°00'00'

00'00'

TUMMALAPALLE

GANDI-MADYALABODUGIDDANKIPALLE

KANAMPALLE

79° 00'

KORIVIPALLE

VEMPALLE

PULIVENDULA

29 km

4 6 k m

5 4 k m

32 km

BADVEL

KASTURIGATTU

Tummalapalle & extension areas

Stratabound Uranium Deposit (Southern Cuddapah)� Dolostone hosted stratabound uranium deposit at Tummallapalle in the southern part of Cuddapah basin was established in the early nineties. �As a consequence of the development of an innovative pressure alkali route beneficiation process and prevailing high uranium cost turned the deposit economical. � Exploration work has been intensified in extension areas of Tummalapalle in 30 km belt (10 blocks), out of 160 km potential uranium occurrences in Vempalle Formation along southwestern margin of Cuddapah Basin.� A low grade, large size deposit has already been proved in Tummalapalle-Rachakuntapalle (3 blocks).

15

STRATIGRAPHIC SUCCESSION – TUMMALAPALLE AREA(Paleo- Mesoproterozoic)

Pulivendla QuartziteDisconformity Basic Sills/DykesStromatolitic Cherty LimestonePurple Shale

Vempalle Formation DolostoneDolostone-- UraniferousUraniferousIntraformational ConglomerateMassive LimestonePurple Shale

Gulcheru Formation Quarztite & Conglomerate Unconformity Basement Granite Gneiss

Uraniferous Dolostone

Intraformational Conglomerate

StromatoliticCherty Limestone

Purple Shale

Massive Limestone

PAPA

GHA

NI G

ROUP

Disequilibrium in favour of uranium1. Based on Chemical Value : 19%2. Based on β/ γ value : 34%

16

Out of 160 km U-Occurrence10 blocks identified in 30 km

Low grade, Large size deposit has alreadybeen proved in Tummalapalle-Rachakuntapalle

365 samples

70% Recovery by pressure alkali route

Homogeneous nature of ore body in strike as well as dip wise

18

Mode• Thin stringers of pitchblende within phosphatic dolomitic groundmass

• Thin fracture filled veins within quartz clasts

• Intergranular fillings within collophane rich portion

• Inclusions in quartz clasts

Loci• Carbonate-phosphate contact• Sutured boundary of microstylolites• Layer of stromatolite• Grain boundary of quartz clasts•Within cavities filled with fibrous dolomite and framboidal pyrite

URANIUM MINERALISATION IN VEMPALLE DOLOSTONE

Vein-like pitchblende (P) in phosphate, calcitic dolostone from Tummalapalle.

U-Ti complex (U-Ti) within a clast of quartz in mineralized phosphatic, siliceous, calcitic dolostone.

Ovoid grain showing intimate association of pitchblende (P) and pyrite (Py) in phosphatic siliceous calcitic dolostone

19

Nature of host rockNature of host rock Impure, siliceous, phosphatic, dolomitic, stromatolitic Limestone

Uranium MineralsUranium Minerals Pitchblende , Coffinite, U-Ti complex, CollophaneAssociated mineralsAssociated minerals Pyrite, Chalcopyrite, Molybdenite, Bornite, Digenite,

CovelliteGangue MineralsGangue Minerals Dolomite, Quartz, MicroclineGradeGrade 0.040 to 0.046% eU3O8

Trace ElementsTrace ElementsThe average concentration of molybdenum, nickel, copper, cobalt, barium in hangwall lode is 230, 30, 90, 25 and 215 ppm (n=250) respectively and in footwall lode are 44, 42, 55, 10 and 289ppm (n=150). Average P2O5values are 2.46% in HW and 2.60% in FW.

Controls of Controls of mineralisationmineralisation

Phosphate, silica and organic matter in the impure dolomitic limestone are the main controlling factors for uranium mineralisation

CHARACTERISTICS OF URANIFEROUS VEMPALLE DOLOSTONE

RECOVERY / LEACHABILITY OF TUMMALAPALLE ORE

� Exhaustive experiments on leachability (alkali route) indicated recovery 65-70%, using NaCO3 & NaHCO3 as the leachants and KMnO4 as the oxidant.� To increase uranium concentration in leach liquor number of multicycle leaching experiments were carried out by Cross Current Leaching, followed by Filtration and Counter Current Washing (CCLFCCW).�Experiments enhanced uranium concentration in leach liquor (1.5-1.8 g/L) with significant reduction in consumption of leachants, but the cost intensive oxidant (KMnO4) could not be reduced.

� Studies indicated suitable alternative cost-effective oxidants in lieu of KMnO4 are industrial oxygen or Air. � Precipitation of uranium as sodium di-uranate from the leach liquor obtained by CCLFCCW, showed that it is possible to quantitatively precipitate (>95%) out the uranium values with a high grade (82% U3O8) and purity. � Pilot scale test work on the process flow sheet evolved at Technology Demonstration Pilot-plant, Jaduguda. Results indicate achieving about 75% leachability following alkaline pressure leaching.

SCHEMATIC FLOWSHEET FOR PROCESSING OF TUMMALAPALLE ORERUN-OFF MINE ORE

SIZE REDUCTION

DEWATERING & REPULPING

PRESSURE LEACHING FOLLOWED BY FILTRATION AND COUNTER

CURRENT WASHING

YELLOW CAKE PRECIPITATION

SOLID-LIQUID SEPARATION (THICKENING + FILTRATION)

DRYING & PACKING

YELLOW CAKE

EVAPORATION

Steam

Tailings (for Disposal)

LeachantsNa2CO3 & NaHCO3

Oxidant, Industrial O2

Aravalli and Delhi Basins, Rajasthan� Paleo- Mesoproterozoic Aravalli and Delhi Group of metasediments of Rajasthan and neighbouring areas holds potential as several shear zones with anomalous uranium have been identified. Important are Umra near Udaipur and Rohil close to Jaipur. � Uranium mineralisation at Umra is associated with dolomitic limestone, carbonaceous phyllite and a dark metasedimentary assemblage ( Aravalli Supergroup) �Uranium mineralisation at Rohil in the North Delhi Fold Belt is associated with albitites (320 km long zone of albitite-microclinite-pyroxinite, also referred to as “albitite line”) with carbonaceous phyllite and mica schist of Delhi Supergroup.

V VVV V

V VV

V VVV

VV VVV

V V V VVV

V V V VV

VVV

VV

V VVV

V

Vrrrr

r rr rrrr

J J J JJ J J J

J JJ J

J JJ

J J J JJJJJ JJ J J

JJJ J

J

J JJJ

J

J JJ J

J J J

JJ J

J

J

J J

aaaa

J

a

VaJ

V

Barmer

JaisalmerBadhaura

Jodhpur

Pali

Jalor

Nagaur

Jhunjhunu

Sikar

Ladi-ka-basKalatopri

JAIPUR

Alwar

BharatpurDiara

Rohil - Ghateshwar

Kushlawali DhaniPanchlangi

KerpuraKaroth Ki Dhanian

Mewaragujarwas

Siswali

Dhanota

SiorKanthiAntri

Goga TempleBadhaura

Swai Madhopur

Kunchalwara

Devpura

BundiBhilwara

KherpuraPutholi

ChitorgarhJhalawar

UdaisagarUmra

PrasadPalanpur

Dungapur

Banswara

Kota

KalamagraUdaipur

Haldughati

Kharbar

Durgapura

0 50 100 km

24°00'

26°00'

28°00'

26°00'

28°00'

Hy derabad

GEOLOGICAL MAP OF PART OF RAJASTHAN SHOWING URANIUM OCCURRENCES

r r

24°00'

70° 00' 72° 00' 74° 00'76° 00'

78° 00'

72° 00'

74° 00'76° 00'

AlluviumSandstone & Conglomerate/LateriteDeccan TrapAbur BedsJurassic FormationsBap BedsVindhyan SupergroupMalani RhyoliteErinpura GraniteDelhi SupergroupRaialo SeriesAravalli Supergroup/Basic & Ultrabasic RocksGranite/Nepheline SyeniteBanded Gneissic Complex (BGC)Uranium Occurrence

Umra

Rohil-Ghateshwar

24

492.15m

488.80m

485.10m

483.45m

483.40

RL-484.30m

RL-492.75m

RL-490.30m

RL-490.55m

R L-490.50m

GEOLOGICAL MAP SHOWING BOREHOLE'S LOCATION OF GHATESHWAR - ROHIL AREA DISTT. SIKAR ( RAJASTHAN) TOPOSHEET NO. 45M/6

GTR-66

GTR-72

GTR-75

GTR-58

RHL-15

RHL-26

RHL-21

RHL-20

RHL-13A

39ARHL-17

RHL-24&27

Scale

GEOLOGICAL MAP SHOWING BOREHOLES LOCATION OF ROHIL AREA ( CENTRAL BLOCK ) DISTT. SIKAR , RAJASTHAN TOPOSHE ET NO. 45M/6

100m 50m 0m 100m

GTR -69GTR -35GTR-82495.06m

487.08m

486.20m

486.60m

487.00m

GTR-83

GTR-57

GTR-87

486.00m

GTR-56

485.70m

GTR-53

487.10m

487.95m

GTR-50

GTR-42A

488.60m 486.80m

GTR -61

GTR -36

489.00m

509.50m

RHL-36

493.08m

493.70m

494.05m

GTR-76

GTR-74

GTR-77

494.82m

GTR-79

494.80m

494.65m

GTR -73

GTR -78

492.35m

GTR-32

GTR -71

493.70m

492.30m

RHL-31

495.30m

GTR-81

485.80m

RHL-35

488.40m

GTR-67

487.40m

GTR -21

487.40m

GTR -12

486.90m

GTR-18

487.00m

492.50m

GTR-25

488.15m

GTR -65

GTR-26ARHL-33 489.00m

492m

RHL-30

490.20

RHL-28

487.50m

GTR -40

490.20

484.20m

484.30m

484.00m

GTR-22

GTR-55&62

486.70m

485.60m

GTR-14

GTR-19

484.76m

484.80m

GTR-11

GTR -37&47

486.20m

GTR-39

485.00m

486.60m

RHL-16

483.60m

491.70m

GTR-68

GTR -28

484.20m

GTR -32

486.28m

GTR-7

GTR -10

RL-489.00m

RL-489.10m

GTR-30

GTR-5

483.30m

GTR-59

GTR-38483.25m

RHL-14

483.60

RL-485.40m

GTR-34

GTR-63

RL-485.30m

RL-488.90m

RL-490.10m

RL-489.80m

GTR-33

RL-488.50m

RL-491.44m

GTR -8

GTR -24

GTR -45&51(60 ° )

GTR-46(Ab)

GTR-48

GTR-70RHL-1

RHL-11RHL-9

R L-490.87m

RL-490.7 5m

491.30m

GTR-49

GTR-44

RL-491.00m

R L-490.9 0m

GTR-41

RL-491.00m

491.0 0mGTR-16

GTR-54

R L-490.70m

RHL-4,4A(Ab)

490.7 0m

491.3 0m

RL-491 .30m

R L-491.00m

R L-491.2 5mRHL-5

RHL-2

RL-491.56m

RL-491.55m

GTR-23

R L-491.1 3m

RHL-8

RHL-10

RHL-6

RL-491.20m

RL-491 .40m

GTR-64RL-491.7 0m

R L-492.0 0m

RHL-3

492.20mRHL-7

GTR-27491.30m

RHL-12

GTR-60

RL-492.9 0m

GTR-29

100m 50m 0mScale

100m

RL-493.5 0mGTR-31

492.50m

490.05m

RHL-41

RHL-25

491.80mRHL-37

491.20

489.35m

RHL-18

RHL-39491m

491.25m

GTR-86

485.30m

RHL-42

487.10m

485.00m

RHL-38

RHL-19486.82mRHL-44

482.50m

RHL-34

482.70m

RL-485.70m

RHL-43482.45m

RHL-22

RHL-40

RHL-234 8 2 . 4 5

RHL-29

RL-488 .60m

RL-488 .36m

487.8 5m

GTR-88

GTR-80

GTR-84R L-487.5 5mGTR-85

486.42mGTR-89

R L-485.7 0m

GTR-90

INDEXSOIL COVER

KAOLINISED/PU LVERISED Z ONE

QUARTZ & AMPHIBOLE QUARTZ ITE AT PLACES/a:GRA PHITIC QUARTZ ITEPREVIOUS BOREHOLE D RILLED (AMD/BH, GH/BH SERIES)

PRESENT GTR/RHL SERIES OF BOREHOLES(COMPLETED /IN PROGRESS/PROPOSED)SURFACE ANOMALY

SHEAR Z ONE/FAULT

SURVEY STATION

CONDUCTOR AXIS

I.P. ANOMALOU S Z ONE

KZ PZ

3 3a

N

N

CENTRAL BLOCK

NORTH BLOCK

SOUTH BLOCK

N

100 N

200 N

300 N

400 N

500 N

600 N

700 N

800 N

900 N

1000 N

1100 N

1200 N

0 0

-100 N

-200 N

-300 N

-400 N

-500 N

-600 N

-700 N

-800 N

-900 N

-800 N

-700 N

-300 N

-600 N

-500 N

-400 N

-200 N

-100 N

1300 N

1400 N

1500 N

1600 N

1700 N

1800 N

1900 N

2000 N

2100 N

2200 N

2300 N

2400 N

2500 N

2600 N

2700 N

2800 N

2900 N

3000 N

3100 N

3200 N

3300 N

3400 N

2200 N

2000 N

2100 N

2400 N

2300 N

2500 N

2600 N

2700 N

2800 N

2900 N

3000 N

3100 N

3200 N

3300 N

3500 N

3400 N

1200 N

1300 N

1400 N

1500 N

1600 N

1700 N

1800 N

1900 N

-900 N

0 0

100 N

200 N

300 N

400 N

500 N

600 N

700 N

900 N

800 N

1000 N

1100 N

0

-500E -400 E

-300 E

-200E

100 E

200 E

300 E

400 E

500 E

600E

200 E

100 E

300 E

400 E 500

E

600E0

0 700E

800E

-100

E 00 10

0 E

200

E

300

E

500 E 60

0E

700E

800E

400 E 90

0E

1000

E

1100

E

1200

E

1300

E

1400

E

1500

E

1600

E

NORT

HING

(Y)

EASTING (X)

GTR-94R L-488.80m

GTR-93RL-495.60m

ST- 5

ST-8

RHL-47A496.85m

GTR-6

GTR-3

GTR-2A

&GTR-52

GTR-1

3500 N

3600 N

3700 N

3800 N

3900 N

4000 N

4100 N

4200 N

4300 N

3600 N

3700 N

3800 N

3900 N

4000 N

4100 N

4200 N

4300 N

R O H I L

N- 1

00-N

0-S1

N- 2

N- 3

N- 4

N- 5

N-6

N- 7

N- 8

N- 9

N- 10

N- 11

N-13

N-15

N-20

N-25

N-30

N-35

N-43

RNE-1

GTR-97

GTR-95

R L-487.02m

GTR-92&96R L-488.88m

RL-489.06mGTR-98

RL-489 .08m

P-20

I.P. ANOMALOUS ZONE

CONDUCTOR AXIS

SURVEY STATION

3

KZ

3a

PZ

SHEAR ZONE/FAULT

SURFACE ANOMALY

KAOLINISED/PULV ERISED ZONE

SOIL COVER

INDEX

QUARTZ & AMPHIBOLE QUARTZ ITE AT PLACES/a :GRAPHITIC QUARTZITEPREVIOUS BOREHOLE DRILLED (AMD/BH, GH/BH SERIES)

PRESENT GTR/RHL SERIES OF BOREHOLES(COMPLETED /IN PROGRESS/PROPOSED)

N-40

R G camp Khandela

GEOLO GICAL MAP SHOWING BOREHOLES LOCATION OF ROHIL AREA ( SOUTH BLOCK ) DISTT. SIKAR , RAJASTHAN TOPOS HEET NO. 4 5M /6

SOIL COVER

KAOL INI SED/PULVER ISED ZONE

QUARTZ & AMPHIBOLE QUARTZ ITE AT PLACES/a :GRAPH ITIC QUARTZITEPREV IOUS BOREHOLE DRILLED (AMD /BH, GH /BH SERIES)

PRESENT GTR/RHL SER IES OF BOREHOLES(COMPLETED /I N PROGRESS /PROPOSED)

SURFACE ANOMALY

SHEAR ZONE /FAULT

SURVEY STAT ION

CONDUCTOR AXI S

I .P. ANOMALOUS ZONE

KZ PZ

3 3a

INDEX

RNE-3RL-491 .77m

GTR-99R L-497.78m

RNE-2

RNE-4

GTR-103

GTR-104

493.54m

GTR -100

GTR-101

GTR-105

GTR -102

GTR -106

GTR -108

GTR-107

R L-481.8 3m

RNE-10

GTR-110492.76m

GTR-111

GTR-112501.87m

501.05m

497.67m

RNE-9

RNE-11R L-489 .35m

RL-486.52m

RNE-12R L-488.50m

RNE-13RL-491.4 2m

RNE-14

R L-481.82mRNE-15

RL-483.5 9mRNE-16

R L-484.5 4mRNE-18

GTR-109 & 114R L-489 .34m

489 .86m

RL-486 .20mRNE-20

R L-484.7 2mRNE-24

RL-485 .04mRNE-22

GTR-113&113A

RNE-17&19RL-495.9 6m

RNE-21&23RL-495 .96m

RNE-25 & 27RL-495 .96m

RNE-5

RNE-8

RNE-7

GTR- 116

RNE-26RL-485 .61m

GTR -115492.06m

RNE-28RL-490 .91m

RNE/30

RNE/29RNE/31

RNE/32RNE/32A

GTR -117

494.33m

GTR-118493.29m

GTR-119

491.25m

488.28m

488.22m

GTR -120

GTR-121

North Extension Block

North Block

Central Block1km x 1km

South Block

Ghateshwar Block

Rohil Exploration

BlocksKhandela Block 1km East

Kerpura 8km

Khatundra-Goria 4kmJhumpa-Jajod 8km

Rohil Central BlockSignificant U-Mineralisation intercepted in BH. GTR/134

26

RHL-15

RHL-26

RHL-21

RHL-20

RHL-13A

RHL-39ARHL-17

RHL-24&27

Scale

GEOLOGICAL MAP SHOWING BOREHOLES LOCATION OF ROHIL AREA ( CENTRAL BLOCK ) DISTT. SIKAR , RAJASTHAN TOPOSHEET NO. 45M/6

100m 50m 100m0m

GTR-76

RHL-36

GTR-73

GTR-79 GTR-74

GTR-78

RHL-32

GTR-71 RHL-31

200m

GTR-21

RHL-35GTR-12

GTR-18

GTR-25

GTR-26A

GTR-65

RHL-33

RHL-28

RHL-30

GTR-40

GTR-14

GTR-55&62

GTR-22

GTR-19

GTR-37&47

GTR-11

GTR-39 RHL-16

GTR-68

GTR-28

GTR-32

GTR-10

GTR-7

GTR-30

GTR-5

GTR-59

GTR-38 RHL-14

GTR-34

GTR-63

GTR-33

GTR-8

GTR-45&51

GTR-46(Ab)

RHL-41

RHL-25

RHL-37

RHL-39

RHL-18

GTR-86

RHL-42RHL-38

RHL-19

RHL-34

RHL-44

RHL-43RHL-22

RHL-40

RHL-23

RHL-29

INDEXSOIL COVER

QUARTZITE

SHEAR ZONE/FAULT

CONDUCTOR AXIS

CENTRAL BLOCK

N

100 N

200 N

300 N

400 N

500 N

600 N

800 N

700 N

1000 N

900 N

0

100 S 100 S

0

100 N

200 N

300 N

400 N

500 N

600 N

700 N

900 N

1000 N

800 N

300

W

1100 N

400

W

200W

200 E10

0 E

300 E

500 E

600E

00

100

W

700E

800E

NORT

HING

(Y)

EASTING (X)

RHL 47A

R O H I L

N- 10-N00-S1

N- 2

N- 3

N- 4

N- 5

N-6

N- 7

N- 8

N- 9

N- 10

GTR-48N- 11

GTR-81

GTR-58

RHL-46

GTR-24

GTR-43ARHL-45

E-1

E-1

Samadhi

School

Projected U-Lodes

GTR-100

GTR-102

GTR-106GTR-108

GTR-117

GTR-120

GTR-116

GTR-112

GRANITE

RHL-49

RHL-48

GTR-126

A1A

B

B1

B2

B3B4

A

BB1

GTR-134GTR-143

RHL-49A

RHL-50

GTR-146

RHL-52RHL-51

Borehole Location Plan, Rohil Central Block

Dongargarh and N. Surguja Shear Zone, Chhattisgarh�Uranium exploration in Kotri-Dongarhgarh belt located uranium mineralisation at Bodal, Bhandaritola, Baghnadi, Jangalpur, etc. associated with amphibolite (Pitepani), metarhyolite (Bijli) and Dongarhgarh granite of Nandgaon Group (Paleoproterozoic).� Uranium mineralisation at Mogrra, Malharbodi, Nalpani, Udarichhapar, etc. is associated with Bortalao sandstone and conglomerate of Khairagarh Group (Mesoproterozoic). �Low grade, small size uranium reserves have been proved at Mogrra, Maharashtra and Bodal-Bhandaritola, Chhattisgarh.� Uranium mineralisation as vein, lenses and shoots of variable size & shape confined in the quartzo- feldspathic rocks of North Surguja Shear Zone at Jajawal-Dumhat, Chhattisgarh.

•12

•5

4

•8•7

•11

•9

•14•

16

•15

•18

10

17

•19

•21

•22

•24

•23

•25•20 •27

•28

•30•29

•32

•38

•31

•37

•34•35

•39

•40

•33•36

ALLUVIUM

LATERITE

DECCAN TRAP

INFRATRAPPEAN/LAMETA

GONDWANA

VINDHYAN SUPERGROUPCHHATTISGARH/INDRAVATI SUPERGROUP

PAKHAL/ABUJHMAR/KHAIRAGARH

DONGARGARH GRANITENANDGAON/SONAKHAN GROUP

BIJAWAR GROUP

BUNDELKHAND GRANITE

SAKOLI

UNCLASSIFIED GRANITE

•3

SAUSAR/CHILPI

�

�

�

��

�

�

�

�

�

�SagarJhabua

NasikAurangabad

Ratnagiri

Khandwa

Kolhapur

Nanded

84º82º76º 80º74º 78º

22º

24º

16º

18º

20º

050 50 km

GEOLOGICAL MAP OF MADHYA PRADESH, MAHARASHTRA AND CHHATTISGARH

Jagdalpur

Rewa Sidhi

RaipurT a p ti L i n e a me n t

Nagpur

•13•

�

Ambikapur•26• 12

1. BODAL 2. BHANDARITOLA 4. MOGARRA 7. JAJAWAL 8. DHABI 9. DUMHAT

�

•41

•Na r ma d a – S o n L i n e a me n t

•

�

· Uranium occurrences / deposit

•

•

•42

6

D EP O

S I TS

Other potential areas

�Mesoproterozoic Gwalior Basin, Madhya Pradesh, Kunjar Basin, Orissa, and Shillong Basin, Meghalaya.� Proterozoic Bijawar-Mahakoshal-Vindhyan Basins.� Paleoproterozoic Quartz Pebble Conglomerates (QPC) of Sundargarh and Jajpur districts of Orissa. � Mesozoic Satpura Gondwana, Madhya Pradesh� Cenozoic Siwalik Basin, Lesser Himalaya.�South Purulia Shear Zone (SPSZ) exposing alkaline carbonatite complex within tuffaceous phyllite of Singhbhum Group, Eastern India.

CONCLUSION

�Indian uranium deposits are of low grade except Gogi, Karnataka.� Vempalli Formation (160 km), in SW margin of Cuddapah Basin has very large potential for Stratabound (dolostone) type low grade uranium deposit.� Delhi Supergroup (North Delhi Fold Belt) holds large promise for low grade uranium deposit associated with albitites. � Low grade large size deposits may be made economically viable by new technology in mining and milling processes.�There are many geological settings, which have ample potential for uranium deposits.