鄂霍茨克洋与太平洋构造域叠合的岩浆作用与成矿响应

发布时间：2018-06-12 00:56

本文选题：岩浆作用 + 成矿作用　；参考：《矿物岩石地球化学通报》2017年04期

【摘要】：课题拟重点开展华北北缘及其邻区燕山期岩浆-成矿作用的时空分布规律、成岩-成矿性质及形成背景研究。通过对比不同时空背景下岩浆-成矿作用的类型,查找典型构造带上岩浆的岩石化学及同位素组成的时空演变规律,明确古鄂霍茨克洋和太平洋俯冲体系对区内岩浆作用的制约,限定古洋壳向华北地块俯冲、转换的时限。分析岩浆-金属成矿作用区岩浆产生的物理化学条件、运移演化过程、源区性质及记录的壳幔相互作用,并在剖析典型资源矿产聚集区燕山期成矿类型及成矿机理基础上,探讨岩浆性质、成岩过程与成矿类型、成矿作用的关系,建立岩浆-成矿作用与古洋壳俯冲叠合的内在联系,构建成岩-成矿作用与块体俯冲拼合的动力学过程。同时,将深源岩石包体示踪和地球物理资料有机结合,开展不同地区深部岩石圈组成、结构,以及深部过程与浅部响应的综合研究。
[Abstract]:This paper focuses on the temporal and spatial distribution, diagenetic and metallogenic properties and background of the Yanshanian magmatic metallogeny in the northern margin of North China and its adjacent areas. By comparing the types of magmatic metallogeny in different space-time backgrounds, the authors find out the space-time evolution law of petrochemistry and isotopic composition of magma in typical tectonic belt. The constraints of Paleo-Okhotsk and Pacific subduction systems on magmatism in the region are defined, and the time limit for the subduction and transformation of the paleo-oceanic crust to the North China block is defined. The physical and chemical conditions, migration and evolution process, source property and recorded crust-mantle interaction of magma in the magma metallogenic zone are analyzed. On the basis of analyzing the metallogenic types and metallogenic mechanism of Yanshanian epoch in the typical resource and mineral accumulation area, The relationship between magmatic property, diagenetic process and metallogenic type, metallogeny is discussed, the internal relation between magma and mineralization and paleoceanic crust subduction is established, and the dynamic process of diagenesis and mineralization is constructed. At the same time, a comprehensive study on the composition, structure, deep process and shallow response of the deep lithosphere in different regions is carried out by combining the deep source rock inclusion tracer and geophysical data.
【作者单位】：中国地质大学地球科学学院地质过程与矿产资源国家重点实验室;中国科学院广州地球化学研究所矿物学与成矿学地球化学国家重点实验室;中国科学院广州地球化学研究所同位素地球化学国家重点实验室;吉林大学地球科学学院;
【基金】：国家重点研发计划“燕山期重大地质事件的深部过程与资源效应”子课题(2016YFC0600403)资助
【分类号】：P588.11;P612

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