湘桂地区泥盆系硅质岩稀土元素地球化学及沉积环境
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原地矿部重点攻关项目 “中国南方泥盆纪岩相古地理及沉积层控矿产远景预测"(No.86012-E)资助


REE Geochemistry and Sedimentary Environment of Devonian Cherts in Guangxi and Hunan
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    摘要:

    对湘桂地区泥盆系钦防海槽和南丹-河池台盆及灵山-衡阳台盆中发育的硅质岩的稀土元素地球化学分析,给出这些硅质岩为深水盆地沉积环境产物的解释,其成因类型既包括了正常沉积硅质岩,也有部分为原生热水沉积硅质岩,为证实丹治台盆及灵衡垮台 盆形成为线性走滑作用所致提供了新的证据。

    Abstract:

    Based on analysing the rare earth elements and geochemical characteristics of Devonian cherts from Qingzhou-Fangchen ocean trough and Hechi-Nandan platformal basin in Guangxi and Linshan-Hengyang platformal basin in Guangxi-Hunan, it is considered that the sedimentary environment of these cherts is a deep-water basin, and that sedimentary cherts constitute two genetic types, namely normally deposited cherts and hot-water deposited cherts. Furthermore, all these phenomena prove that Hechi-Nandan and Linshan-Hengyang platformal basins were formed by linear strike-slipping tectonic movement in Devonian.

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毛晓冬,段其发,陈泽云,1999,湘桂地区泥盆系硅质岩稀土元素地球化学及沉积环境[J].岩石矿物学杂志,18(3):229~236. Mao Xiaodong, Duan Qifa, Chen Zeyun,1999,REE Geochemistry and Sedimentary Environment of Devonian Cherts in Guangxi and Hunan[J]. Acta Petrologica et Mineralogica,18(3):229~236.

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