Brine-driven destruction of clay minerals in Gale crater, Mars

doi:10.1126/science.abg5449

GSTDTAP > 气候变化

DOI	10.1126/science.abg5449
	Brine-driven destruction of clay minerals in Gale crater, Mars
	T. F. Bristow; J. P. Grotzinger; E. B. Rampe; J. Cuadros; S. J. Chipera; G. W. Downs; C. M. Fedo; J. Frydenvang; A. C. McAdam; R. V. Morris; C. N. Achilles; D. F. Blake; N. Castle; P. Craig; D. J. Des Marais; R. T. Downs; R. M. Hazen; D. W. Ming; S. M. Morrison; M. T. Thorpe; A. H. Treiman; V. Tu; D. T. Vaniman; A. S. Yen; R. Gellert; P. R. Mahaffy; R. C. Wiens; A. B. Bryk; K. A. Bennett; V. K. Fox; R. E. Millken; A. A. Fraeman; A. R. Vasavada
	2021-07-09
发表期刊	Science
出版年	2021
英文摘要	Sedimentary rocks exposed in Gale crater on Mars contain extensive clay minerals. Bristow et al. analyzed drill samples collected by the Curiosity rover as it climbed up sedimentary layers in the crater. They found evidence of past reactions with liquid water and sulfate brines, which could have percolated through the clay from an overlying sulfate deposit. Similar sulfate deposits are widespread across the planet and represent some of the last sedimentary rocks to form before the planet lost its surface liquid water, so the results inform our understanding of the geologic processes that occurred as Mars dried out. Science, abg5449, this issue p. [198][1] Mars’ sedimentary rock record preserves information on geological (and potential astrobiological) processes that occurred on the planet billions of years ago. The Curiosity rover is exploring the lower reaches of Mount Sharp, in Gale crater on Mars. A traverse from Vera Rubin ridge to Glen Torridon has allowed Curiosity to examine a lateral transect of rock strata laid down in a martian lake ~3.5 billion years ago. We report spatial differences in the mineralogy of time-equivalent sedimentary rocks <400 meters apart. These differences indicate localized infiltration of silica-poor brines, generated during deposition of overlying magnesium sulfate–bearing strata. We propose that destabilization of silicate minerals driven by silica-poor brines (rarely observed on Earth) was widespread on ancient Mars, because sulfate deposits are globally distributed. [1]: /lookup/doi/10.1126/science.abg5449
领域	气候变化 ; 资源环境
URL	查看原文
引用统计	被引频次：57[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/334264
专题	气候变化资源环境科学
推荐引用方式 GB/T 7714	T. F. Bristow,J. P. Grotzinger,E. B. Rampe,et al. Brine-driven destruction of clay minerals in Gale crater, Mars[J]. Science,2021.
APA	T. F. Bristow.,J. P. Grotzinger.,E. B. Rampe.,J. Cuadros.,S. J. Chipera.,...&A. R. Vasavada.(2021).Brine-driven destruction of clay minerals in Gale crater, Mars.Science.
MLA	T. F. Bristow,et al."Brine-driven destruction of clay minerals in Gale crater, Mars".Science (2021).