PMID- 32999802
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20240329
IS  - 2169-9097 (Print)
IS  - 2169-9100 (Electronic)
IS  - 2169-9097 (Linking)
VI  - 125
IP  - 9
DP  - 2020 Sep
TI  - Hydrogen Variability in the Murray Formation, Gale Crater, Mars.
PG  - e2019JE006289
LID - 10.1029/2019JE006289 [doi]
LID - e2019JE006289
AB  - The Mars Science Laboratory (MSL) Curiosity rover is exploring the Murray 
      formation, a sequence of heterolithic mudstones and sandstones recording fluvial 
      deltaic and lake deposits that comprise over 350 m of sedimentary strata within 
      Gale crater. We examine >4,500 Murray formation bedrock points, employing recent 
      laboratory calibrations for ChemCam laser-induced breakdown spectroscopy H 
      measurements at millimeter scale. Bedrock in the Murray formation has an 
      interquartile range of 2.3-3.1 wt.% H(2)O, similar to measurements using the 
      Dynamic Albedo of Neutrons and Sample Analysis at Mars instruments. However, 
      specific stratigraphic intervals include high H targets (6-18 wt.% H(2)O) 
      correlated with Si, Mg, Ca, Mn, or Fe, indicating units with opal, hydrated Mg 
      sulfates, hydrated Ca sulfates, Mn-enriched units, and akageneite or other iron 
      oxyhydroxides, respectively. One stratigraphic interval with higher hydrogen is 
      the Sutton Island unit and Blunts Point unit contact, where higher hydrogen is 
      associated with Fe-rich, Ca-rich, and Mg-rich points. A second interval with 
      higher hydrogen occurs in the Vera Rubin ridge portion of the Murray formation, 
      where higher hydrogen is associated with Fe-rich, Ca-rich, and Si-rich points. We 
      also observe trends in the H signal with grain size, separate from chemical 
      variation, whereby coarser-grained rocks have higher hydrogen. Variability in the 
      hydrogen content of rocks points to a history of water-rock interaction at Gale 
      crater that included changes in lake water chemistry during Murray formation 
      deposition and multiple subsequent groundwater episodes.
CI  - (c)2020 The Authors.
FAU - Thomas, N H
AU  - Thomas NH
AUID- ORCID: 0000-0003-1989-4860
AD  - Division of Geological and Planetary Sciences California Institute of Technology 
      Pasadena CA USA.
FAU - Ehlmann, B L
AU  - Ehlmann BL
AUID- ORCID: 0000-0002-2745-3240
AD  - Division of Geological and Planetary Sciences California Institute of Technology 
      Pasadena CA USA.
AD  - Jet Propulsion Laboratory California Institute of Technology Pasadena CA USA.
FAU - Rapin, W
AU  - Rapin W
AUID- ORCID: 0000-0003-4660-8006
AD  - Division of Geological and Planetary Sciences California Institute of Technology 
      Pasadena CA USA.
FAU - Rivera-Hernandez, F
AU  - Rivera-Hernandez F
AUID- ORCID: 0000-0003-1401-2259
AD  - Earth Sciences Dartmouth College Hanover NH USA.
FAU - Stein, N T
AU  - Stein NT
AUID- ORCID: 0000-0003-3385-9957
AD  - Division of Geological and Planetary Sciences California Institute of Technology 
      Pasadena CA USA.
FAU - Frydenvang, J
AU  - Frydenvang J
AUID- ORCID: 0000-0001-9294-1227
AD  - Natural History Museum University of Copenhagen Copenhagen Denmark.
FAU - Gabriel, T
AU  - Gabriel T
AUID- ORCID: 0000-0002-9767-4153
AD  - School of Earth and Space Exploration Arizona State University Tempe AZ USA.
FAU - Meslin, P-Y
AU  - Meslin PY
AUID- ORCID: 0000-0002-0703-3951
AD  - Institut de Recherche en Astrophysique et Planetologie Universite de Toulouse, 
      CNRS, UPS, CNES Toulouse France.
FAU - Maurice, S
AU  - Maurice S
AD  - Institut de Recherche en Astrophysique et Planetologie Universite de Toulouse, 
      CNRS, UPS, CNES Toulouse France.
FAU - Wiens, R C
AU  - Wiens RC
AUID- ORCID: 0000-0002-3409-7344
AD  - Los Alamos National Laboratory Los Alamos NM USA.
LA  - eng
PT  - Journal Article
DEP - 20200827
PL  - United States
TA  - J Geophys Res Planets
JT  - Journal of geophysical research. Planets
JID - 101661797
PMC - PMC7507757
OTO - NOTNLM
OT  - Mars Science Laboratory Curiosity rover
OT  - aqueous geochemistry
OT  - hydrogen
EDAT- 2020/10/02 06:00
MHDA- 2020/10/02 06:01
PMCR- 2020/09/22
CRDT- 2020/10/01 05:37
PHST- 2019/11/22 00:00 [received]
PHST- 2020/03/04 00:00 [revised]
PHST- 2020/03/09 00:00 [accepted]
PHST- 2020/10/01 05:37 [entrez]
PHST- 2020/10/02 06:00 [pubmed]
PHST- 2020/10/02 06:01 [medline]
PHST- 2020/09/22 00:00 [pmc-release]
AID - JGRE21333 [pii]
AID - 10.1029/2019JE006289 [doi]
PST - ppublish
SO  - J Geophys Res Planets. 2020 Sep;125(9):e2019JE006289. doi: 10.1029/2019JE006289. 
      Epub 2020 Aug 27.