Geochemistry and Mineralogy of Western Australian Salt Lake Sediments: Implications for Meridiani Planum on Mars.
Geochemistry and Mineralogy of Western Australian Salt Lake Sediments: Implications for Meridiani Planum on Mars.
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西澳大利亚盐湖沉积物的地球化学和矿物学：对火星子午线平原的影响
DOI：
10.1089/ast.2015.1429
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发表时间：
2016
期刊：
影响因子：
4.2
通讯作者：
Kappler
中科院分区：
文献类型：
--
作者：
Ruecker;Schröder;Weigold;Behrens;Kappler
Hypersaline lakes are characteristic for Western Australia and display a rare combination of geochemical and mineralogical properties that make these lakes potential analogues for past conditions on Mars. In our study, we focused on the geochemistry and mineralogy of Lake Orr and Lake Whurr. While both lakes are poor in organic carbon (<1%), the sediments’ pH values differ and range from 3.8 to 4.8 in Lake Orr and from 5.4 to 6.3 in Lake Whurr sediments. Lake Whurr sediments were dominated by orange and red sediment zones in which the main Fe minerals were identified as hematite, goethite, and tentatively jarosite and pyrite. Lake Orr was dominated by brownish and blackish sediments where the main Fe minerals were goethite and another paramagnetic Fe(III)-phase that could not be identified. Furthermore, a likely secondary Fe(II)-phase was observed in Lake Orr sediments. The mineralogy of these two salt lakes in the sampling area is strongly influenced by events such as flooding, evaporation, and desiccation, processes that explain at least to some extent the observed differences between Lake Orr and Lake Whurr. The iron mineralogy of Lake Whurr sediments and the high salinity make this lake a suitable analogue for Meridiani Planum on Mars, and in particular the tentative identification of pyrite in Lake Whurr sediments has implications for the interpretation of the Fe mineralogy of Meridiani Planum sediments. Key Words: Western Australia—Salt lakes—Jarosite—Hematite—Pyrite—Mars analogue. Astrobiology 16, 525–538.
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影响因子：
2.3
作者：
P. Weigold;A. Ruecker;Tina Loesekann-Behrens;A. Kappler;S. Behrens
通讯作者：
P. Weigold;A. Ruecker;Tina Loesekann-Behrens;A. Kappler;S. Behrens
影响因子：
2
作者：
Benison, Kathleen C.;Bowen, Brenda Beitler;Hong, Bo-Young
通讯作者：
Hong, Bo-Young
西澳大利亚现代酸性卤水的早期成岩作用及其对火星沉积改造历史的影响
影响因子：
3.7
作者：
B. Bowen;K. Benison;S. Story
通讯作者：
S. Story
影响因子：
3.2
作者：
Carter, John;Viviano-Beck, Christina;Le Deit, Laetitia
通讯作者：
Le Deit, Laetitia
影响因子：
4.7
作者：
M. Malki;E. González-Toril;J. Sanz;F. Gómez;N. Rodríguez;R. Amils
通讯作者：
M. Malki;E. González-Toril;J. Sanz;F. Gómez;N. Rodríguez;R. Amils