منابع مشابه
Jarosite stability on Mars
Jarosite, a potassium (sodium) iron sulphate hydrated mineral, has recently been identified on the martian surface by the Opportunity rover. Using recent thermochemical data [Drouet and Navrotsky, 2003, Geochim. Cosmochim. Acta 67, 2063–2076; Forray et al., 2005, Geochim. Cosmochim. Acta, in press], we calculate the equilibrium decomposition curve of jarosite and show that it is thermodynamical...
متن کاملHydrothermal jarosite and hematite in a pyroxene-hosted melt inclusion in martian meteorite Miller Range (MIL) 03346: Implications for magmatic-hydrothermal fluids on Mars
Low-temperature aqueous processes have been implicated in the generation of jarosite and hematite on the martian surface, but little is known regarding the role that high-temperature magmatic fluids may have played in producing similar assemblages on Mars. We have identified jarosite and hematite in a clinopyroxene-hosted melt inclusion in martian meteorite MIL 03346 that shows evidence of havi...
متن کاملOn 2-primal Ore Extensions
When R is a local ring with a nilpotent maximal ideal, the Ore extension R[x;σ, δ] will or will not be 2-primal depending on the δ-stability of the maximal ideal of R. In the case where R[x;σ, δ] is 2-primal, it will satisfy an even stronger condition; in the case where R[x;σ, δ] is not 2-primal, it will fail to satisfy an even weaker condition. 1. Background and motivation In [13, Proposition ...
متن کاملNascent Jarosite Mineralization of Sulphur Springs, St. Lucia, W.i.: Implications for Meridiani Jarosite Formation
FOR MERIDIANI JAROSITE FORMATION. J. P. Greenwood 1 , M. S. Gilmore 1 , R. E. Blake 2 , A. M. Martini 3 , M. Gomes 1 , S. Tracy 3 , M. D. Dyar 4 , J. A. Gilmore 5 , and J. Varekamp 1 , 1 Dept. of Earth & Environmental Sciences, Wesleyan University, Middletown, CT 06459, 2 Dept. of Geology & Geophysics, Kline Geology Laboratory, Yale University, New Haven, CT 06520, 3 Dept. of Geology, Amherst C...
متن کاملDouble Ore Extensions versus Iterated Ore Extensions
Motivated by the construction of new examples of Artin-Schelter regular algebras of global dimension four, J.J.Zhang and J.Zhang (2008) introduced an algebra extension AP [y1, y2;σ, δ, τ ] of A, which they called a double Ore extension. This construction seems to be similar to that of a two-step iterated Ore extension over A. The aim of this paper is to describe those double Ore extensions whic...
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ژورنال
عنوان ژورنال: The Journal of the Society of Chemical Industry, Japan
سال: 1949
ISSN: 0023-2734,2185-0860
DOI: 10.1246/nikkashi1898.52.133