Arid
DOI10.1130/G22620A.1
Acid-fog deposition at Kilauea volcano: A possible mechanism for the formation of siliceous-sulfate rock coatings on Mars
Schiffman, Peter; Zierenberg, Robert; Marks, Naomi; Bishop, Janice L.; Dyar, M. Darby
通讯作者Schiffman, Peter
来源期刊GEOLOGY
ISSN0091-7613
EISSN1943-2682
出版年2006
卷号34期号:11页码:921-924
英文摘要

On the summit of Kilauea volcano, sulfur dioxide, which is continuously emitted from Halemaumau crater and rapidly sequestered into sulfuric-acid-rich aerosol entrained in the prevailing trade winds, is subsequently precipitated as acid fog immediately downwind from Kilauea caldera in the Kau Desert. The characteristic pH of surface tephra deposits is < 4.0 in Sand Wash, a region of nearly continuous, acidic aerosol fallout immediately southwest of the caldera. Vertical exposures of unconsolidated tephras of the Keanakakoi Ash found within fissures and small, dry gullies are coated with thin rock coatings of amorphous silica and jarosite. These rock coatings are formed via an evaporative mechanism whereby acidic pore fluids, circulating in the upper few meters within the highly porous tephra, are wicked toward the walls of the gullies. Geochemical modeling of the rock coating formation process implies that the sulfate formation via evaporation occurs subsequent to minimal interaction of acidic pore fluids with the basaltic tephra. This also suggests that the cycle from acid-fog fallout to precipitation of the siliceous-sulfate rock coatings must occur quite rapidly. Acid-fog deposition of sulfate and silica at Kilauea may provide one mechanism for the origin of jarosite-bearing outcrops on Mars.


英文关键词Kilauea Mars weathering rock coatings jarosite amorphous silica
类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000241706800007
WOS关键词MERIDIANI-PLANUM ; JAROSITE ; SPECTRA ; HAWAII ; ORIGIN ; MODEL
WOS类目Geology
WOS研究方向Geology
来源机构University of California, Davis
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/151521
作者单位(1)Univ Calif Davis, Dept Geol, Davis, CA 95616 USA;(2)NASA, Ames Res Ctr, SETI Inst, Mountain View, CA USA;(3)Mt Holyoke Coll, Dept Astron, S Hadley, MA 01075 USA
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Schiffman, Peter,Zierenberg, Robert,Marks, Naomi,et al. Acid-fog deposition at Kilauea volcano: A possible mechanism for the formation of siliceous-sulfate rock coatings on Mars[J]. University of California, Davis,2006,34(11):921-924.
APA Schiffman, Peter,Zierenberg, Robert,Marks, Naomi,Bishop, Janice L.,&Dyar, M. Darby.(2006).Acid-fog deposition at Kilauea volcano: A possible mechanism for the formation of siliceous-sulfate rock coatings on Mars.GEOLOGY,34(11),921-924.
MLA Schiffman, Peter,et al."Acid-fog deposition at Kilauea volcano: A possible mechanism for the formation of siliceous-sulfate rock coatings on Mars".GEOLOGY 34.11(2006):921-924.
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