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Diagenetic silica enrichment and late-stage groundwater activity in Gale crater, Mars
被引:93
|作者:
Frydenvang, J.
[1
,2
]
Gasda, P. J.
[1
]
Hurowitz, J. A.
[3
]
Grotzinger, J. P.
[4
]
Wiens, R. C.
[1
]
Newsom, H. E.
[5
]
Edgett, K. S.
[6
]
Watkins, J.
[4
]
Bridges, J. C.
[7
]
Maurice, S.
[8
]
Fisk, M. R.
[9
]
Johnson, J. R.
[10
]
Rapin, W.
[4
]
Stein, N. T.
[4
]
Clegg, S. M.
[1
]
Schwenzer, S. P.
[11
]
Bedford, C. C.
[11
]
Edwards, P.
[7
]
Mangold, N.
[12
]
Cousin, A.
[8
]
Anderson, R. B.
[13
]
Payre, V.
[14
]
Vaniman, D.
[15
]
Blake, D. F.
[16
]
Lanza, N. L.
[1
]
Gupta, S.
[17
]
Van Beek, J.
[6
]
Sautter, V.
[18
]
Meslin, P. -Y.
[8
]
Rice, M.
[19
]
Milliken, R.
[20
]
Gellert, R.
[21
]
Thompson, L.
[22
]
Clark, B. C.
[23
]
Sumner, D. Y.
[24
]
Fraeman, A. A.
[25
]
Kinch, K. M.
[2
]
Madsen, M. B.
[2
]
Mitrofanov, I. G.
[26
]
Jun, I.
[25
]
Calef, F.
[25
]
Vasavada, A. R.
[25
]
机构:
[1] Los Alamos Natl Lab, Los Alamos, NM 87544 USA
[2] Univ Copenhagen, Fac Sci, Copenhagen, Denmark
[3] SUNY Stony Brook, Dept Geosci, Stony Brook, NY USA
[4] CALTECH, Div Geol & Planetary Sci, Pasadena, CA 91125 USA
[5] Univ New Mexico, Dept Earth & Planetary Sci, Albuquerque, NM 87131 USA
[6] Malin Space Sci Syst, San Diego, CA USA
[7] Univ Leicester, Dept Phys & Astron, Space Res Ctr, Leicester, Leics, England
[8] Inst Rech Astrophys & Planetol, Toulouse, France
[9] Oregon State Univ, Coll Earth Ocean & Atmospher Sci, Corvallis, OR USA
[10] Johns Hopkins Univ, Appl Phys Lab, Laurel, MD USA
[11] Open Univ, Dept Environm Earth & Ecosyst, Milton Keynes, Bucks, England
[12] Univ Nantes, CNRS, Lab Planetol & Geodynam Nantes, Nantes, France
[13] US Geol Survey, Flagstaff, AZ 86001 USA
[14] Univ Lorraine, GeoRessources, Nancy, France
[15] Planetary Sci Inst, Tucson, AZ USA
[16] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA
[17] Imperial Coll London, Dept Earth Sci & Engn, London, England
[18] IMPMC, Museum Natl Hist Nat, Paris, France
[19] Western Washington Univ, Geol Dept, Bellingham, WA 98225 USA
[20] Brown Univ, Dept Geol Sci, Providence, RI 02912 USA
[21] Univ Guelph, Dept Phys, Guelph, ON, Canada
[22] Univ New Brunswick, Dept Earth Sci, Fredericton, NB, Canada
[23] Space Sci Inst, Boulder, CO USA
[24] Univ Calif Davis, Earth & Planetary Sci, Davis, CA 95616 USA
[25] CALTECH, Jet Prop Lab, Pasadena, CA USA
[26] Space Res Inst, Moscow, Russia
关键词:
Diagenesis;
Silica;
Groundwater;
Gale crater;
Mars;
MSL;
CHEMCAM INSTRUMENT SUITE;
X-RAY SPECTROMETER;
SANDSTONES;
EVOLUTION;
DEPOSITS;
ORIGIN;
ROCKS;
BASIN;
STATE;
UNIT;
D O I:
10.1002/2017GL073323
中图分类号:
P [天文学、地球科学];
学科分类号:
07 ;
摘要:
Diagenetic silica enrichment in fracture-associated halos that crosscut lacustrine and unconformably overlying aeolian sedimentary bedrock is observed on the lower north slope of Aeolis Mons in Gale crater, Mars. The diagenetic silica enrichment is colocated with detrital silica enrichment observed in the lacustrine bedrock yet extends into a considerably younger, unconformably draping aeolian sandstone, implying that diagenetic silica enrichment postdates the detrital silica enrichment. A causal connection between the detrital and diagenetic silica enrichment implies that water was present in the subsurface of Gale crater long after deposition of the lacustrine sediments and that it mobilized detrital amorphous silica and precipitated it along fractures in the overlying bedrock. Although absolute timing is uncertain, the observed diagenesis likely represents some of the most recent groundwater activity in Gale crater and suggests that the timescale of potential habitability extended considerably beyond the time that the lacustrine sediments of Aeolis Mons were deposited.
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页码:4716 / 4724
页数:9
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