【摘要】：鄂西恩施地區(qū)孤峰組普遍發(fā)育一套含骨針和放射蟲的硅質(zhì)巖夾炭質(zhì)頁(yè)巖。通過硅質(zhì)巖巖石學(xué)和地球化學(xué)特征研究,綜合判斷中二疊統(tǒng)孤峰組硅質(zhì)巖沉積環(huán)境為大陸邊緣中下部與深水盆地結(jié)合部位,具有生物與熱水混合成因特征,且向上熱水參與作用增強(qiáng),從而導(dǎo)致了礦物元素的分異。結(jié)合全巖樣品分析結(jié)果,認(rèn)為富礦層位為中上部炭質(zhì)頁(yè)巖含量較高的層位,建立了找礦標(biāo)志,為本區(qū)地質(zhì)找礦工作做出了重要貢獻(xiàn)。
[Abstract]:A set of siliceous rock-carbonaceous shale containing bone needle and radiolaria is generally developed in Gufeng formation of Enshi area, western Hubei province. Based on the study of petrology and geochemistry of siliceous rocks, it is concluded that the sedimentary environment of siliceous rocks in the Gufeng formation of the Middle Permian is the combination of the middle and lower parts of the continental margin with the deep water basin, which is characterized by the mixed genesis of biological and hot water. And the participation of upward hot water is enhanced, which leads to the differentiation of mineral elements. Combined with the analysis results of the whole rock samples, it is considered that the rich ore horizon is the horizon with high content of the middle and upper carbonaceous shale, and the prospecting mark has been established, which has made an important contribution to the geological prospecting work in this area.
【作者單位】： 湖北省地質(zhì)調(diào)查院;
【基金】：中國(guó)地質(zhì)調(diào)查局大調(diào)查項(xiàng)目(12120114066101);中國(guó)地質(zhì)調(diào)查局揚(yáng)子工程湘西-鄂西成礦帶神農(nóng)架-花垣地區(qū)地質(zhì)礦產(chǎn)調(diào)查二級(jí)項(xiàng)目(No.DD20160029)
【分類號(hào)】：P584;P612

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