Exploring Lacus Veris , Orientale · 2019-02-05 · Exploring Lacus Veris , Orientale to Probe the...

ExploringLacusVeris,Orientale

toProbetheVolcanicandImpactHistoriesoftheMoon

DebraH.Needham

and

JenniferL.Whitten,CalebI.Fassett,andJamesW.Head

LunarScienceforLandedMissionsWorkshop

January11,2018

GeologyofOrientale• Youngestoflargelunarbasins.

• Formed~3.68Ga.(Whittenetal.,2011)

• Endofthebasin-formingepoch.

• Locatedonthetransitionoffromthintothicklunarcrust.

GeologyofOrientale• Orientalehas

• Threeconcentricrings(multi-ring

basin)

Cordillera Ring

Outer Rook Ring

Inner Rook Ring

LROC WAC image, WAC GLD DEM;

Cordillera Ring

Outer Rook Ring

Inner Rook Ring



basin)

• 23marepondsinadditiontothe

centralMareOrientale.

• LacusVeris,thelargestpond,isnestedbetween:

• OuterRookRing

• Excavatedlunarcrust

• MaunderFormation

• PrimaryOrientaleejecta

Moon Mineralogy Mapper color composite, highlighting mafic mineral absorptions (R 1.0 µm; G 2.0 µm; B, 1489 nm), from Whitten et al., 2011.



basin)

• 23marepondsinadditiontothe

centralMareOrientale.

• LacusVeris,thelargestpond,isnestedbetween:

• OuterRookRing




Lacus Veris

Mare pond ages within Orientale, from Whitten et al., 2011.

Western Orientale: Later this session (Whitten et al.,) between the Inner and Outer Rook Mountains

Eastern Orientale: This Studyalong the Outer Rook Mountains

Selected because of proximity to a variety of geologic units within Orientale, including the mare, the melt sheet (Maunder Formation), and the basin ring materials.

Proposed Landing Sites

LROC WAC

LacusVeris Site

Kaguya Terrain Camera TC_EVE_02_S12E273S15E276SC.

Outer Rook Mountains

Maunder Formation

Lacus Veris

• Accesstosamplesfrom

• OuterRookMountains




• LacusVerisMareBasaltPond

• SinuousRille

ScienceObjectivesandTraverseatLacusVeris• ScienceObjectives:1. Determinecompositionandageof

volcanicactivity,investigate

sinuousrille formation.

a) AddressesGoals5,7ofNRC,2007.

2. Determinecompositionandageof

MaunderFormationimpactmelt.

a) AddressesGoals1,3,6,7.

3. Determinecompositionanddepth

oforiginofOuterRookMountains.

a) AddressesGoals1,3,6.

Kaguya Terrain Camera DTM.

ScienceObjectivesandTraverseatLacusVeris• Traverse:~20km

• Station1:Samplemarebasalts(SO1)

• Station2:Investigatecontactbetween

marebasaltandMF(SO1,SO2)

• Station3:SampleMFimpactmelt(SO2)

• Station4:Investigatesinuousrille (SO1)

• Station5:SampleORRbouldersthat

slumpedfromoutcropsabove(SO3)


ORRandMF(SO2,SO3)


Landing SiteS1

S2

S3

S4

S5

S6










ORRandMF(SO2,SO3)

Landing SiteS1

S2

S3

S4

S5

S6

Moon Mineralogy Mapper color composite.










ORRandMF(SO2,SO3)

Landing SiteS1

S2

S3

S4

S5

S6

Kaguya Terrain Camera Slope Map.










ORRandMF(SO2,SO3)


Landing SiteS1

S2

S3

S4

S5

S6

Station1:Samplemarebasalts(SO1)

LROC image M1160675618LE.










ORRandMF(SO2,SO3)


Landing SiteS1

S2

S3

S4

S5

S6

Station2:InvestigatecontactbetweenmarebasaltandMF(SO1,SO2)











ORRandMF(SO2,SO3)


Landing SiteS1

S2

S3

S4

S5

S6

Station3:SampleMFimpactmelt(SO2)











ORRandMF(SO2,SO3)


Landing SiteS1

S2

S3

S4

S5

S6

Station4:Investigatesinuousrille (SO1)











ORRandMF(SO2,SO3)


Landing SiteS1

S2

S3

S4

S5

S6Station5:SampleORRbouldersthat



MeasurementsandInstrumentsNeededtoAddressObjectives

• ScienceObjectives:1. Determinecompositionandageofvolcanicactivity.

- Measurebulk,traceelementcompositionsofbasalt.

- MeasurerelativeabundancesofK/Ar,Rb/Sr,orU/Pb isotopes.

• Requiresstereocameraandmicro-imagerfornavigationandcontextimages.

• Requiresmini-XRF/XRDormini-SEM.

• RequiresKArLE,withLIBS(Cohenetal.,2014),orequivalent.

• ScienceObjectives:2. DeterminecompositionandageofMaunderFormationimpactmelt.

- Measurebulk,traceelementcompositionsofanorthosite-bearingimpactmelt.

- Characterizeshockfeaturespresentinimpactmelttoconstrainimpacteffects.

- MeasurerelativeabundancesofK/Ar,Rb/Sr,orU/Pb isotopes.

• Requiresstereocameraandmicro-imagerfornavigation,contextimages,andto

searchforshockfeaturesinanorthosite.


• RequiresKArLE,withLIBS(Cohenetal.,2014),orequivalentforothergeochronometers.


• ScienceObjectives:3. DeterminecompositionanddepthoforiginofOuterRookMountains.

- Measurebulk,traceelementcompositionsofanorthositic rocks,particularlyabundanceofAn.

- DeterminemineralsuitepresentinORRtodeterminedepthoforigin.

- Characterizeshockfeaturespresentinanorthosite toconstrainimpacteffects.

• Requiresstereocameraandmicro-imagerfornavigation,contextimages,andto

searchforshockfeaturesinanorthosite.



SummaryScienceObjective NRC,2007 Measurements Instruments1.Determinecomposition

andageofvolcanicactivity,

investigatesinuous rille

formation

Goal5 (volcanichistory)

Goal7(regolith formation)

- Bulk,traceelement

compositions ofbasalt.

- RelativeabundancesofK/Ar or

other.

- Mini-XRF/XRD ormini-

SEM.

- KArLE, withLIBS,or

equivalent.

2.Determinecomposition

andageofMaunder

Formation impactmelt.

Goal1(bombardment

history)

Goal3(diversityofcrustal

rocks)

Goal6(impactprocesses)

Goal7

- Bulk,traceelement


- RelativeabundancesofK/Ar or

other.

- Shockfeaturesinimpactmelt.


SEM.

- KArLE, withLIBS,or

equivalent.

- Micro-imager

3.Determinecomposition

anddepthoforigin ofOuter

RookMountains

Goal1

Goal3

Goal 6

- Bulk,traceelement


- Mineralsuite.

- Shockfeaturesinimpactmelt.


SEM.

- Micro-imager

• Additionally,aUVVISspectrometertoassistinidentifyingsamplesforanalysis.

• Willalsoneedaroboticarmtoretrievesamplesanddelivertoinstrumentdeck,

andarockabrasiontooltoremoveregolithfromsamplesites.

LacusVeris Site






• LacusVeris MareBasaltPond

• SinuousRille


LacusVeris Site







• SinuousRille

Moon Mineralogy Mapper color composite. Basalt is orange-yellow, fresh anorthosite is purple.

LacusVeris Site

Kaguya Terrain Camera Slope Map.







• SinuousRille

Exploring Lacus Veris , Orientale · 2019-02-05 · Exploring Lacus Veris , Orientale to Probe the...

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