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通过深入研究江达构造带的构造演化及构造-成矿耦合关系,对江达构造带的成矿规律进行了初步研究,提出其经历了洋陆作用下的陆缘弧体制(C3-T2)→陆内伸展作用下的陆内-陆间裂谷体制(T3-E1)→以印度—欧亚板块陆-陆碰撞为主要动因、印度—欧亚—太平洋板块联合作用下的陆内造山体制(E2-Q)等3种构造体制的转换;不同构造体制下的成矿作用分别构成了3个相对独立的成矿体系:岛弧成矿体系的成矿作用主要表现为接触交代型Cu矿化,并可能存在火山热液型Cu、Pb-Zn矿化;陆内裂谷成矿体系的成矿作用主要表现为接触交代型和热水喷流或火山热液型,最主要的成矿作用是因燕山期中酸性岩浆侵入而发生的接触交代型Fe、Cu、Pb、Zn、Ag、Au、Ga成矿作用;陆内造山成矿体系的成矿作用主要表现为构造-岩浆-热液形成一系列Au、Ag多金属矿床和对先成矿床的叠加改造。
Through deep study on tectonic evolution and tectonic-metallogenic coupling relationship of Jiangda tectonic belt, the metallogenic regularity of Jiangda tectonic belt has been studied. It is suggested that the continental arc system (C3-T2) → Inland intracontinental rifting system (T3-E1) → Intracontinental orogenesis under the combined effect of Indo-Eurasian-Pacific plateau with continental-continental collision of Indo-Eurasian plate as the main cause (E2-Q). The ore-forming processes under different tectonic regimes respectively constitute three relatively independent metallogenic systems: the mineralization of the island arc metallogenic system is mainly manifested by the contact with Cu-type ore And there may be volcanic hydrothermal Cu and Pb-Zn mineralization. The mineralization of intra-continental rift metallogenic system is mainly manifested as contact metasomatism and hot water jet or volcanic hydrothermal type, the most important mineralization The results show that the mineralization of the contact metasomatism Fe, Cu, Pb, Zn, Ag, Au and Ga occurred during the intermediate-acid magmatic intrusion in the Yanshanian period. The mineralization of the intracontinental orogeny metallogenic system is mainly characterized by tectono-magmatic hydrothermal Forming a series of Au, Ag polymetallic deposits and superposition of the transformation of the predecessor deposits.