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您的检索式：作者名="JianmingLiu"
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| 1 | Sulfide assemblages in granulite xenoliths from Hannuoba Basalt, Hebei Province, China显示文摘Granulite xenoliths are important samples for understanding the forming and evolution of the crust. The granulite xeno- liths enclosed in Cenozoic basalt of Hannuoba, Hebei Province, China, contain four types of sulfide assemblages: isolate rotundity enclosed sulfides, intergranular sulfides between minerals, secondary sulfide inclusions ranging in linear, and fissure-filling sulfides. Electron microprobe analysis shows that the components of sulfides are Ni-poor pyrrhotite with the molar ratios of (Ni+Co+Cu)/Fe less than 0.2. The molar ratios of (Fe+Cu+Co+Ni)/S are less than 0.875 of normal pyrrhotite, and are less than those of mantle xeno- liths, reflecting a sulfur-saturated environment. Pyrrhotite in various occurrences contains some Au and Ag, with the averages of 0.19wt%-0.22wt% Au and 0.01wt%-0.02wt% Ag, showing the gold mineralization related to the granulitization of low crust. Ni, Co and Cu have a normal correlation with S in pyrrhotite, indicating that heavy metal elements have a same source similar to sulfur be- cause of the degasification of upper mantle. | JiuhuaXu YulingXie XueleiChu JianmingLiu QianMao | 2005 | Journal of University of Science and Technology Beijing2005，12，2： | 0 |
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