四川米易地区前震旦纪五马箐组变质岩特征及原岩恢复
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摘要
近年来,在四川米易地区前震旦纪五马箐组的变质-混合岩中发现了具有重要找矿前景的混合岩型铀矿,而有关其变质岩特征及原岩恢复研究对查明区内混合岩型铀矿的成矿地质环境具有重要意义。在系统野外地质调查和室内综合研究的基础上,对该套变质岩的岩石学特征、岩石地球化学特征以及变质原岩特征进行了深入分析。
In recent years, the migmatite type uranium deposits with important prospecting potential have been discovered in the metamorphic-mixed rocks of the pre-SinianWumaqing Group in the Miyi area of Sichuan Province. And the study on the characteristics of Wumaqing Group metamorphic rocks and the protolith reconstruction is of great significance for the identification of mineralized geological environment of the migmatite type uranium deposits. On the basis of the detailed field geological survey and rock mineralogy research, we mainly focused on the characteristics of petrology and geochemistry and metamorphic preexisting of these rocks.
In recent years, the migmatite type uranium deposits with important prospecting potential have been discovered in the metamorphic-mixed rocks of the pre-SinianWumaqing Group in the Miyi area of Sichuan Province. And the study on the characteristics of Wumaqing Group metamorphic rocks and the protolith reconstruction is of great significance for the identification of mineralized geological environment of the migmatite type uranium deposits. On the basis of the detailed field geological survey and rock mineralogy research, we mainly focused on the characteristics of petrology and geochemistry and metamorphic preexisting of these rocks.
引文
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[2] 四川省地质局第一区测队.1∶20万米易幅区域地质测量报告[R].1966.
[3] 廖洪昌,杨英杰.米易垭口五马箐变质地层时代及变质作用的讨论[J].四川地质(科技情报),1984,16(2):1-11.
[4] 姚祖德,倪秉方.四川会理-米易-盐边一带前震旦系变质岩特征及时代问题[J].中国区域地质,1990(02):166-172.
[5] 朱占祥,赵友年.四川前震旦纪岩石层单位清理后的实践及应用[J].中国区域地质,1991 (3):199-209.
[6] 四川地勘局攀西地质大队.1∶5万大桥幅地质图说明书[R].1996.
[7] 辜学达,刘啸虎.四川省岩石地层[M].武汉:中国地质大学出版社,1997:155-199.
[8] 陈玉禄,邓强.四川冕宁冶勒变质火山沉积岩系中微古植物的发现及意义[J].中国区域地质,1999(1):101-106.
[9] 姚健,周君.五马箐组变质杂岩岩石化学特征及地质意义[J].四川地质学报,2014(2):179-181.
[10] Eric A.K. Middlmost. Naming materials in the magma/igneous rock system. Earth-Science Review, 1994, 37:215-224.
[11] 胡恭任,刘丛强,章邦桐,等.赣中变质岩带的岩石学特征及原岩恢复[J].江西地质,1999,13(3):163-167.
[12] 肖渊甫,郑荣才,邓江红.岩石学简明教程[M].北京:地质出版社,2009:282.
[13] 周世泰.对17种恢复变质岩原岩的岩石化学方法的检验结果[J].地质论评,1984 (1):81-84.
[14] Winchester, J.A., Park, R.G. & Holland, J.G.The geochemistry of Lewisiansemipelitic schists from the Gairloch District, Wester Ross. ScottISH Journal of Geology, 1980, 16, 165-179.
[15] Tarney, J. Geochemistry of Archean high grade gneisses with implications as to the origin and evolution of Precambrian Crust. In Windley B.F. (Eds.),The early history of earth 1976, (pp. 405-417). London: Wiley.
[16] 周世泰.鞍山-本溪地区条带状铁矿地质[M].北京:北京地质出版社,1994:282.
[17] 王仁民,贺高平,陈珍珍,等.变质岩原岩图解判别方法[M].北京:地质出版社,1987:282.
[18] Семенеко Н. Д. Метаморфизмподвижныхзон: Наук, думка, c.1966,69-123.
[19] Walker, K.R., Joplin, G.A., Lovering, J.F., & Green, R. Metamorphic and metasomatic convergence of basic igneous rocks and lime-magnesia sediments of the precambrian of North-western Queensland. Journal of the Geological Society of Australia, 1960, 6(2), 149-178.
[20] Misra, S.N. Chemical distinction of high-grade Ortho and Para-metabasites. Norwegian Journal of Geology, 1971, 51, 311-316.
[21] Leake, B.E. The chemical distinction between Ortho- and Para-amphibolites. Journal of Petrology, 1964, 5(2), 238-254.