Mars Odyssey Gamma Ray Spectrometer elemental abundances and apparent relative surface age: Implications for Martian crustal evolution

Brian C. Hahn, Scott M. McLennan, G. Jeffrey Taylor, William V. Boynton, James M. Dohm, Mike J. Finch, David K. Hamara, Daniel M. Janes, Suniti Karunatillake, John M. Keller, Kristopher E. Kerry, Albert E. Metzger, Remo M S Williams

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

Quantifying secular variations in the chemical composition of the Martian crust provides unique insights into the processes that have guided the evolution of the Martian crust-mantle system. Using global abundances for a suite of elements determined by the Gamma Ray Spectrometer (GRS) on board the Mars Odyssey spacecraft and global mapping of apparent surface age adapted from existing geologic maps in the USGS Martian Geologic Investigation series, we report the average abundance of K, Th, Fe, Cl, H, and Si for the major Martian geologic epochs (Noachian, Hesperian, and Amazonian). Average GRS-determined K and Th abundances generally decrease by 9% and 7%, respectively, between the Hesperian and the Amazonian, possibly implying evolving magma chemistry throughout major resurfacing events (although the effects of surficial alteration processes cannot be entirely discounted). GRS-determined Fe and Cl averages increase by 12% and 19%, respectively, with younger apparent relative surface age, suggesting the possible mobilization and transport of these elements through aqueous processes (although an igneous origin for the variation in Fe also cannot be excluded). While H abundance does vary with surface age, the relationship is likely not governed by geologic processes. No statistically reliable apparent surface age relation was found for Si.

Original languageEnglish (US)
Article numberE03S11
JournalJournal of Geophysical Research: Space Physics
Volume112
Issue number3
DOIs
StatePublished - Mar 20 2007

Fingerprint

Gamma ray spectrometers
gamma ray spectrometers
crustal evolution
mars
Mars
spectrometer
crusts
magma chemistry
crust
secular variations
secular variation
magma
mobilization
Spacecraft
chemical composition
spacecraft
Earth mantle
time measurement
chemistry
mantle

ASJC Scopus subject areas

  • Oceanography
  • Astronomy and Astrophysics
  • Atmospheric Science
  • Space and Planetary Science
  • Earth and Planetary Sciences (miscellaneous)
  • Geophysics
  • Geochemistry and Petrology

Cite this

Mars Odyssey Gamma Ray Spectrometer elemental abundances and apparent relative surface age : Implications for Martian crustal evolution. / Hahn, Brian C.; McLennan, Scott M.; Taylor, G. Jeffrey; Boynton, William V.; Dohm, James M.; Finch, Mike J.; Hamara, David K.; Janes, Daniel M.; Karunatillake, Suniti; Keller, John M.; Kerry, Kristopher E.; Metzger, Albert E.; Williams, Remo M S.

In: Journal of Geophysical Research: Space Physics, Vol. 112, No. 3, E03S11, 20.03.2007.

Research output: Contribution to journalArticle

Hahn, BC, McLennan, SM, Taylor, GJ, Boynton, WV, Dohm, JM, Finch, MJ, Hamara, DK, Janes, DM, Karunatillake, S, Keller, JM, Kerry, KE, Metzger, AE & Williams, RMS 2007, 'Mars Odyssey Gamma Ray Spectrometer elemental abundances and apparent relative surface age: Implications for Martian crustal evolution', Journal of Geophysical Research: Space Physics, vol. 112, no. 3, E03S11. https://doi.org/10.1029/2006JE002821
Hahn, Brian C. ; McLennan, Scott M. ; Taylor, G. Jeffrey ; Boynton, William V. ; Dohm, James M. ; Finch, Mike J. ; Hamara, David K. ; Janes, Daniel M. ; Karunatillake, Suniti ; Keller, John M. ; Kerry, Kristopher E. ; Metzger, Albert E. ; Williams, Remo M S. / Mars Odyssey Gamma Ray Spectrometer elemental abundances and apparent relative surface age : Implications for Martian crustal evolution. In: Journal of Geophysical Research: Space Physics. 2007 ; Vol. 112, No. 3.
@article{a4799a4189044dd5a0a258e180795159,
title = "Mars Odyssey Gamma Ray Spectrometer elemental abundances and apparent relative surface age: Implications for Martian crustal evolution",
abstract = "Quantifying secular variations in the chemical composition of the Martian crust provides unique insights into the processes that have guided the evolution of the Martian crust-mantle system. Using global abundances for a suite of elements determined by the Gamma Ray Spectrometer (GRS) on board the Mars Odyssey spacecraft and global mapping of apparent surface age adapted from existing geologic maps in the USGS Martian Geologic Investigation series, we report the average abundance of K, Th, Fe, Cl, H, and Si for the major Martian geologic epochs (Noachian, Hesperian, and Amazonian). Average GRS-determined K and Th abundances generally decrease by 9{\%} and 7{\%}, respectively, between the Hesperian and the Amazonian, possibly implying evolving magma chemistry throughout major resurfacing events (although the effects of surficial alteration processes cannot be entirely discounted). GRS-determined Fe and Cl averages increase by 12{\%} and 19{\%}, respectively, with younger apparent relative surface age, suggesting the possible mobilization and transport of these elements through aqueous processes (although an igneous origin for the variation in Fe also cannot be excluded). While H abundance does vary with surface age, the relationship is likely not governed by geologic processes. No statistically reliable apparent surface age relation was found for Si.",
author = "Hahn, {Brian C.} and McLennan, {Scott M.} and Taylor, {G. Jeffrey} and Boynton, {William V.} and Dohm, {James M.} and Finch, {Mike J.} and Hamara, {David K.} and Janes, {Daniel M.} and Suniti Karunatillake and Keller, {John M.} and Kerry, {Kristopher E.} and Metzger, {Albert E.} and Williams, {Remo M S}",
year = "2007",
month = "3",
day = "20",
doi = "10.1029/2006JE002821",
language = "English (US)",
volume = "112",
journal = "Journal of Geophysical Research: Space Physics",
issn = "2169-9380",
publisher = "Wiley-Blackwell",
number = "3",

}

TY - JOUR

T1 - Mars Odyssey Gamma Ray Spectrometer elemental abundances and apparent relative surface age

T2 - Implications for Martian crustal evolution

AU - Hahn, Brian C.

AU - McLennan, Scott M.

AU - Taylor, G. Jeffrey

AU - Boynton, William V.

AU - Dohm, James M.

AU - Finch, Mike J.

AU - Hamara, David K.

AU - Janes, Daniel M.

AU - Karunatillake, Suniti

AU - Keller, John M.

AU - Kerry, Kristopher E.

AU - Metzger, Albert E.

AU - Williams, Remo M S

PY - 2007/3/20

Y1 - 2007/3/20

N2 - Quantifying secular variations in the chemical composition of the Martian crust provides unique insights into the processes that have guided the evolution of the Martian crust-mantle system. Using global abundances for a suite of elements determined by the Gamma Ray Spectrometer (GRS) on board the Mars Odyssey spacecraft and global mapping of apparent surface age adapted from existing geologic maps in the USGS Martian Geologic Investigation series, we report the average abundance of K, Th, Fe, Cl, H, and Si for the major Martian geologic epochs (Noachian, Hesperian, and Amazonian). Average GRS-determined K and Th abundances generally decrease by 9% and 7%, respectively, between the Hesperian and the Amazonian, possibly implying evolving magma chemistry throughout major resurfacing events (although the effects of surficial alteration processes cannot be entirely discounted). GRS-determined Fe and Cl averages increase by 12% and 19%, respectively, with younger apparent relative surface age, suggesting the possible mobilization and transport of these elements through aqueous processes (although an igneous origin for the variation in Fe also cannot be excluded). While H abundance does vary with surface age, the relationship is likely not governed by geologic processes. No statistically reliable apparent surface age relation was found for Si.

AB - Quantifying secular variations in the chemical composition of the Martian crust provides unique insights into the processes that have guided the evolution of the Martian crust-mantle system. Using global abundances for a suite of elements determined by the Gamma Ray Spectrometer (GRS) on board the Mars Odyssey spacecraft and global mapping of apparent surface age adapted from existing geologic maps in the USGS Martian Geologic Investigation series, we report the average abundance of K, Th, Fe, Cl, H, and Si for the major Martian geologic epochs (Noachian, Hesperian, and Amazonian). Average GRS-determined K and Th abundances generally decrease by 9% and 7%, respectively, between the Hesperian and the Amazonian, possibly implying evolving magma chemistry throughout major resurfacing events (although the effects of surficial alteration processes cannot be entirely discounted). GRS-determined Fe and Cl averages increase by 12% and 19%, respectively, with younger apparent relative surface age, suggesting the possible mobilization and transport of these elements through aqueous processes (although an igneous origin for the variation in Fe also cannot be excluded). While H abundance does vary with surface age, the relationship is likely not governed by geologic processes. No statistically reliable apparent surface age relation was found for Si.

UR - http://www.scopus.com/inward/record.url?scp=34249893884&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=34249893884&partnerID=8YFLogxK

U2 - 10.1029/2006JE002821

DO - 10.1029/2006JE002821

M3 - Article

AN - SCOPUS:34249893884

VL - 112

JO - Journal of Geophysical Research: Space Physics

JF - Journal of Geophysical Research: Space Physics

SN - 2169-9380

IS - 3

M1 - E03S11

ER -