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首页> 外文OA文献 >The Composition of Co–Ni–Fe sulfarsenides, diarsenides and triarsenides from the San Juan de Plan deposit, central pyrenees, Spain
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The Composition of Co–Ni–Fe sulfarsenides, diarsenides and triarsenides from the San Juan de Plan deposit, central pyrenees, Spain

机译：西班牙中部比利牛斯圣胡安德普兰德矿床中的钴镍铁硫砷化物，二砷化物和三砷化物的组成

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The San Juan de Plan deposit, in the central Pyrenees of Spain, is situated in an ankeritic horizon in Silurian black shales. The main association consists of pyrite, sulfarsenides, diarsenides, and Co triarsenides (skutterudite), as well as a late stage consisting of cobaltite, Fe, Cu and Bi sulfides and native Bi. The sulfarsenides are arsenopyrite, alloclasite, members of the gersdorffite–cobaltite solid-solution series, arsenic-rich gersdorffite and cobaltite, whereas the diarsenides range from rammelsbergite to safflorite. Rammelsbergite is characterized by a composition within the range (Ni0.71–0.97Co0.02–0.29Fe0.00–0.02)As1.75–2.01S0.00–0.26, exceeding the theoretical value (As1.93S0.07) given by Yund (1962). Two generations of the gersdorffite–cobaltite solid-solution series have been found on the basis of textural features and chemical composition; the first, (Co0.10–0.77Ni0.07–0.80Fe0.03–0.58)As0.95–1.27S0.75–1.06, shows a positive correlation between S and Fe contents, and between Co and As contents, whereas the second one, (Co0.02–0.91Ni0.02–0.96Fe0.00–0.28)As0.99–1.38 S0.67–1.01, exhibits a considerable compositional field in the Fe-poor region of the system CoAsS–NiAsS–FeAsS, providing evidence of extensive substitution of Co by Ni, with a positive correlation between As and Ni contents. Arsenic-rich gersdorffite displays a broad range of As and S mutual substitution, (Ni0.65–0.98Co0.02–0.27Fe0.00–0.06)As1.37–1.83S0.22–0.64, exceeding the experimental value of NiAs1.77S0.23 reported by Yund (1962). The presence of alloclasite and the extent of the solid-solution fields of the cobaltite–gersdorffite series suggest that the main assemblage of minerals at the San Juan de Plan deposit formed at temperatures as high as 600°C.C. Preliminary geothermometric data obtained on graphite support such a high temperature.
机译：位于西班牙比利牛斯山脉中部的San Juan de Plan矿床位于志留纪黑色页岩的一片石质地带。主要成分包括黄铁矿，硫代砷化物，二砷化物和三砷化钴（方钴矿），以及后期由钴铁矿，铁，铜和铋的硫化物以及天然铋组成的阶段。硫代砷化物是毒砂，黄铁矿，锗石-钴固溶体系列成员，富含砷的锗铁矿和钴铁矿，而二砷化物的范围从拉美辉石到辉石。斜方锰铁矿的特征在于（Ni0.71-0.97Co0.02-0.29Fe0.00-0.02）As1.75-2.01S0.00-0.26范围内的成分，超出了理论值（As1.93S0.07） Yund（1962）。根据质地特征和化学成分，发现了两代的锗钙锰矿-钴固溶体系列。第一个（Co0.10–0.77Ni0.07–0.80Fe0.03–0.58）As0.95–1.27S0.75–1.06显示S和Fe含量之间以及Co和As含量之间呈正相关，而第二个是（Co0.02–0.91Ni0.02–0.96Fe0.00–0.28）As0.99–1.38 S0.67–1.01，在CoAsS–NiAsS–FeAsS系统的贫铁区域显示出相当大的成分场，提供了Co被Ni广泛取代的证据，As和Ni含量之间呈正相关。富砷的锗辉石表现出广泛的As和S相互取代，（Ni0.65-0.98Co0.02-0.27Fe0.00-0.06）As1.37-1.83S0.22-0.64，超过了NiAs1的实验值。 Yund（1962）报道的77S0.23。花岗石的存在以及钴铁矿-锗镁铁矿系列固溶场的范围表明，圣胡安德普朗特矿床的主要矿物组合是在高达600°C.C的温度下形成的。在石墨上获得的初步地热数据支持如此高的温度。

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