气候变化领域集成服务门户(CCPortal): Evidence for calcium carbonate at the mars phoenix landing site

CCPortal

DOI	10.1126/science.1172768
	Evidence for calcium carbonate at the mars phoenix landing site
	Boynton W.V.; Ming D.W.; Kounaves S.P.; Young S.M.M.; Arvidson R.E.; Hecht M.H.; Hoffman J.; Niles P.B.; Hamara D.K.; Quinn R.C.; Smith P.H.; Sutter B.; Catling D.C.; Morris R.V.
发表日期	2009
ISSN	0036-8075
起始页码	61
结束页码	64
卷号	325 期号:5936
英文摘要	Carbonates are generally products of aqueous processes and may hold important clues about the history of liquid water on the surface of Mars. Calcium carbonate (approximately 3 to 5 weight percent) has been identified in the soils around the Phoenix landing site by scanning calorimetry showing an endothermic transition beginning around 725°C accompanied by evolution of carbon dioxide and by the ability of the soil to buffer pH against acid addition. Based on empirical kinetics, the amount of calcium carbonate is most consistent with formation in the past by the interaction of atmospheric carbon dioxide with liquid water films on particle surfaces.
英文关键词	acid; buffer; calcium carbonate; carbon dioxide; water; calcium carbonate; calorimetry; carbon dioxide; liquid; Mars; pH; soil chemistry; water; airport; article; astronomy; atmosphere; calorimetry; evolution; film; kinetics; liquid; molecular interaction; molecular weight; pH; priority journal; soil; surface property; temperature; Calcium Carbonate; Carbon Dioxide; Extraterrestrial Environment; Hot Temperature; Hydrogen-Ion Concentration; Mars; Precipitation; Spacecraft; Water
语种	英语
来源期刊	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/243124
作者单位	Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ 85721, United States; Johnson Space Center, Houston, TX 77058, United States; Department of Chemistry, Tufts University, Medford, MA 02155, United States; Department of Earth and Planetary Sciences, Washington University, Saint Louis, MO 63130, United States; Jet Propulsion Laboratory, Pasadena, CA 91109, United States; Department of Physics, University of Texas at Dallas, Richardson, TX 75083, United States; SETI Institute, NASA Ames Research Center, Moffett Field, CA 94035, United States; Department of Earth Sciences, University of Bristol, Bristol BS8 1RJ, United Kingdom; Department of Earth and Space Sciences, University of Washington, Seattle, WA 98195, United States; Jacobs Engineering and Science Contract Group, NASA Johnson Space Center, Houston, TX 77058, United States; Department of Chemistry, University of New Hampshire, Durham, NH 03824, United States
推荐引用方式 GB/T 7714	Boynton W.V.,Ming D.W.,Kounaves S.P.,et al. Evidence for calcium carbonate at the mars phoenix landing site[J],2009,325(5936).
APA	Boynton W.V..,Ming D.W..,Kounaves S.P..,Young S.M.M..,Arvidson R.E..,...&Morris R.V..(2009).Evidence for calcium carbonate at the mars phoenix landing site.Science,325(5936).
MLA	Boynton W.V.,et al."Evidence for calcium carbonate at the mars phoenix landing site".Science 325.5936(2009).