| 中国河南东秦岭—桐柏成矿区、带的划分 |
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| 引用本文： | 胡受奚,郭抗衡.中国河南东秦岭—桐柏成矿区、带的划分[J].大地构造与成矿学,1991,15(1):55-61. |
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| 作者姓名： | 胡受奚 郭抗衡 |
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| 摘 要： | 东秦岭桐柏区域成矿规律的研究,是以不同时期的板块或地体俯冲或碰撞增生构造分析为基础。根据华北地台南缘由两个早寒武地体所组成,划分出华熊成矿区和嵩箕成矿区。著名的秦岭—桐柏褶皱带即为秦岭—桐柏成矿带;而成矿亚带的划分是以不同时期活动陆缘增生或造山带为根据的,它们分别是中元古、加里东和海西成矿亚带。文中阐述了构造环境和成矿作用,并提出花岗岩类及其成矿作用板块构造模式,特别是中生代大储内都挤压或A—型俯冲的成岩成矿模式。
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| 关 键 词： | 成矿区划 成岩成矿模式 东秦岭—桐柏地区 中国 |
METALLOGENETIC SUBDIVISION OF THE EAST QINLING—TONGBEI AREA,CHINA |
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| Abstract: | The discussion of the metallogeny of the East Qinling—Tongbei area is based on the central concepts of plate tectonics,terranes,different geological period accreating plate margins and amalgamation zone between the ancient North China plate and South China plate. The North China metallogenic province is the nucleus of the North China plate,North China platform,which consists of an Early Precambrian basement and its cover. At the south margin of the North China Platform there are two Early Precambrian terranes separated by the Sanmenxia—Xianchen suture. In accordance with many differences between them,two subprovinces are recognized,namely the Huaxiong and the Songji subprovince. Further subdivision ts based upon the framework of the active continental margin in the Middle Proterozoic. The metallogenic belt under discussion is famous as the Qinling—Tongbei fold belt, Further subdivision into the Middle Proterozoic. the Caledonian and the Hercynian metallogenic subbelts is based upon the different period orogenic belts or accreting plate margins. The Qinling-Tonsbei orogenic belt is the amalgamation zone between the ancient North China and the South China plates in the late stages of the Hercynian period. In this paper, the tectonic setting and metallogeneses have been elucidated, and a plate tectonic model for geneses of granitoids and related ore deposits in intracontinental compression subduction or A—type subduction environments in the Mesozoic has been proposed. |
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| Keywords: | metallogenetic subdivision diagenesis and metallogenesis model East Qingling—Tongbei area China |
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