| 汉南金水-青泥坑镁铁层状杂岩体岩石层序与铂矿化 |
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| 关键词:mafic layered complex rocksequence Pt-deposits Jinshui-Qingnikeng Hannan |
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| Mafic Layered Comples Body and Its Platinum-Bearing Nature in Jinshui-Qingnikeng Hannan |
| Jinshuui-Qingnikeng mafic layered complex body is located north rim of Yangtze plate, east-north position of Hannan terrain.It intrudes into Xixiang Group,out-cropping, more than 500km2 and is mainly composed of gabbroites, partly ultramafic py-roxenite and peridotite.
According to layered rock-sequence and types, the body is divided into two zones; the upper gabbroites and the lower zone composed of pyroxenite, peridotite and coarse altered gabbroite.
It is studied that evolution of petrochemisry, mineral chemistry and trace element geochemistry is consistent with that of layered rock sequence. The position of developing rhythemtic units shows there had been many time emplacement activity of magma forming complex body. Besides, this paper has shown that the total value of REE and (La/Yb)N increase with rise of layered rock sequence yet, those coincidence with general low of REE fractionation tendency.
In this paper, a systematic explantion for PGE distribution characteristics of various rocks in the complex body has been made, and the occurrence places of mineralization of Pt and Cu-Ni has preliminarily been determined and minerogenesis of PGE has also been dis-cussed.
After analysing geological tectonic environment in which the complex body forms, it is discussed character of parental magma, and estimated partly melting degree. |
| Yang Xing,Pan Xiaoping,Yao Wenguang,Yang Jianguo,Yang Hequn.1996.Mafic Layered Comples Body and Its Platinum-Bearing Nature in Jinshui-Qingnikeng Hannan[J].Acta Geoscientica Sinica,17(z1):43-49. |
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