DOI:
矿床地质:1991,Vol.>>Issue(2):97-106

中国东部花岗岩类的成岩和成矿及其与构造环境的关系
南京大学地球科学系
Petrogeneses and metallogeneses 0f granitoids in east china in relation to their tectonic settings
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中文摘要:文章在有关中国东部地质构造、不同类型花岗岩类及其有关矿床的资料基础上,探讨中国东部自显生宙以来,特别是中生代欧亚板块与太平洋板块和印度一澳大利亚板块相互强烈碰撞挤压过程中,产生的NE、NNE和EW向,其次为南北走向,向大陆内部倾向的板块和板片B-型和A-型俯冲,下行滑脱或俯冲推覆对花岗岩类(及其岩带)、有关矿床(矿带)的形成和空间分布关系,并论述形成大型和超大型矿床(或矿带)的成矿物质来源。并在此基础上,建立一种与板块一板片构造作用有关的动态的成矿模式。
Abstract:From the standpoint of plate tectonics, this paper deals tentatively with the relations among granitoids of different types, their related ore deposits and faults, and discusses the formation, distribution and material sources of granitoids and related ores in the process of large-scale horizontal and lateral movement, such as B-type(oceanic lithosphere)subduction, A-type seduction (continental lithosphere), downgoing decollement or downthrust. Based upon abundant data on the geological structures, different types of granitoids and related ore deposits in East China, the authors emphasize the importance of the intracontinental compression-subduction(A-type subduction) and downgoing decollement which trend NE, NNE, EW and dip inland(i. e.not toward ocean and in parallel with the Benioff zone)in the formation and distribution of granitoids and related ore deposits. With the rising of temperature and pressure during the subduction, the downgoing plate or slabs would have been degassed, dealkalined and desilicified. Thus, the ore-forming and rock-forming materials for the formation of large or superlarge deposits might have been mainly derived from lateral souxces, that is to say, from the descending plate or slabs during intracontinental compression-subduction. The above discussion has led the authors to establish a metallogenic model in relation to the plate tectonism.
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引用文本:
胡受奚,胡志宏,郭继春,季海章,卢冰,孙冶东.1991.中国东部花岗岩类的成岩和成矿及其与构造环境的关系[J].矿床地质,10(2):97~106
.1991.Petrogeneses and metallogeneses 0f granitoids in east china in relation to their tectonic settings[J].Mineral Deposits10(2):97~106
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