鄂皖赣巨型矿集区的构造复合成矿特征

通过综合研究，提出鄂皖赣相邻的地区处于华南洋构造域扬子反S型构造体系东部，燕山期时与滨太平洋构造域新华夏构造体系郯庐断裂带集群复合，形成一个由巨量金属矿质堆积的巨型内生金属矿集区。钨、铜、金、银、钽、铀、铁多金属在国内均占有重要地位，拟称之为鄂皖赣巨型矿集区。研究论证了晋宁期华南洋的位置及其陆缘弧盆系统。进一步论述了该区中新元古代以来自晋宁期华南洋、扬子-加里东期华南裂谷系到华力西-印支期陆表海的地质发展演化、构造格局及成矿作用。重点讨论了燕山期陆内活化造山与岩浆成矿大爆发的构造活动方式以及构造复合控岩控矿特征。初步构建了鄂皖赣燕山期巨型矿集区的框架及其成矿带、成矿亚带、主要矿集区、重要矿田的空间展布。在此基础上研究指出，晋宁期华南洋及其陆缘弧盆的地质背景是有利的成矿之基；欧亚板块与古太平洋板块强烈的相互作用引发的燕山期陆内活化造山，导致多源成矿岩浆与成矿流体大爆发是大规模成矿之源；两大构造域、两大构造体系复合是形成巨型矿集区之因。

The structural composite metallogenic characteristics of Hubei-Anhui-Jiangxi giant ore concentration area

Through a comprehensive research, the authors put forward that the adjoining areas among Hubei, Anhui and Jiangxi provinces located in the eastern part of the Yangtze reversed S shaped structure in the Huanan Ocean tectonic domain were compounded with the clusters of Tancheng Lujiang fault zone of the Neocathaysian structural system during the Yanshanian period, and thus formed a giant endogenetic ore concentration area accumulated by a huge amount of metals. Therefore, it is called as the E Wan Gan giant ore concentration area, and the polymetals such as W, Cu, Au, Ag, U and Te occupy an important position in China. The research expounded the location and the continental margin arc basin system of Huanan Ocean of the Jinning period, and further explained the geological evolution, the tectonic framework and the mineralization from the Huanan Ocean of the Jinning period and the Yangtze Caledonian South China rift system to Variscan Indosinian epeiric sea since the Meso Neoproterozoic. The paper focuses on discussing the tectonic activity mode, the tectonic composite rock and ore controlling characteristics of the Yanshannian intracontinental active orogenesis and metallogenetic magmatic explosion. Furthermore, the framework of Yanshannian giant ore concentration area and its spatial distribution of metallogenic belt, metallogenic sub belt, and major ore concentration area and ore field were preliminarily established. On the basis of the research, it is indicated that the geological settings of the Huanan Ocean of Jinning period and its continental marginal arc basin is the favorable metallogenic foundation, while the firestorm of the multisource metallogenic magma and metallogenic fluids resulting from the Yanshanian intracontinental active orogenesis triggered by the intensive interaction between the Eurasian Plate and the Palaeo Pacific Plate is the source of the large scale mineralization; meanwhile, the compounding between the two large structural domains and systems is the cause of the formation of giant ore concentration area.