FIELD GEOLOGY IN THE VALLEY OF TAURUS-LITTROW · Tranquilitatis (?) Clasts/Tracks 72255,72275...

FIELD GEOLOGY IN THE VALLEY OF TAURUS-LITTROW:

How And Why The Last Lunar Samples Were Collected

Harrison H. SchmittLunar Science For Landed Missions Workshop

Ames Research CenterJanuary 10, 2018

5.

9.

70001-9,70011-295

Station1Boulder

AgeGa

71040-175

71500

Tranquilitatis (?)Clasts/Tracks72255,722754.08±0.08Ga

Rb-Sr

Procellarum (?)Zircons72215,73217

4.333±0.007GaPb-Pb

ReportedAgesLayeredSouthMassifBreccia - Boulder1,

Station2

Serenetatis ?ImpactMelt722553.887Ga (Ave.3)

40-39Ar

Fecunditatis (?)Micro-GraniteClasts

72255,722154.03±0.03Ga

Rb-Sr

Crisium(?)Whitlockite

722753.98±0.05Ga

Tracks

Crisium(?)GraniteClasts

72215,72255,722753.95±0.03Rb-Sr

72215-75

72315-395

10 CM

72415

72435

72440,460

73130-134

73220-80

73001/2

74220-60

74001/2

PlanarTopRearofboulder

shadow75075

75055ACB

PlanarTopRearofboulder

x

x75075

75055AB

C

75055

Crisium(?)Blue-GrayMelt-Breccia

762953.93±0.04Ga

40Ar/39Ar

Crisium(?)Intrusive/Extrusive

Tan-GrayMelt-Breccia76215

3.91±0.04Ga40Ar/39Ar

50cm

VesicularContact

MetamorphicZone

BoulderatStation6

MetamorphosedBlue-GrayMelt-Breccia

771153.84±0.02Ga

40Ar/39ArSernitatis(?)Light-GrayMelt-Breccia

771353.83±0.04Ga

40Ar/39Ar

20cm

NoriteClast4.42±0.1Ga

Pb-Pb

BoulderatStation7

ContactMetamorphicZone

76500

78235-8

78420-80

79115-195

79001/2

79215

Orientationof70019

70215

76535BSEImagesfromElardoetal.2012

OPXCPX

Relictgrainboundarymaybepre-garnet,olivine-plag boundary

Cr-SPLCPXOPX