辽宁省铅锌矿床成矿作用研究

辽宁省铅锌矿床，根据其形成背景及物质来源可划分出岩浆热液型、矽卡岩型、陆相次火山热液型、变质海相火山热液型、变质同生沉积型、同生沉积－变质热液再造型、沉积－变质－岩浆热液叠加改造型、盆地热卤水型等８种类型。矿床特征显示出铅锌矿床的形成大多明显地受到了太古代绿岩带及早元古代以来碳酸盐岩地层的控制；在成因上多与优地槽环境下的海底火山活动、地壳深部的热环流作用及活化地台上的岩浆活动有关。铅锌矿床的成矿作用受到了太古代—早元古代地槽形成到回返、中元古代初期地台形成到坳拉谷产生及中生代地台活化三个大地构造发展阶段的影响，同时早古生代中期吉黑地槽系的强烈活动也对地台北缘凡河凹陷内的铅锌矿床的形成起到了明显的控制作用。矿床成因模式受不同大地构造发展阶段的影响而具有明显的演化规律，由太古代末期的变质海相火山热液矿床，早元古代变质同生沉积矿床、变质热液再造矿床，到早古生代中期的盆地热卤水型矿床，最终演化成中生代的岩浆成因型（热液型、矽卡岩型、陆相次火山热液型）矿床及叠生矿床。

STUDIES ON THE METALLOGENISIS OF LEAD ZINC DEPOSITS IN LIAONING

Based on the setting of metallogenesis and the sources of metallogenetic material, lead zinc deposits in Liaoning can be divided into 8 types: magmatic hydrothermal type, skarn type, continental subvolcanic hydrothermal type, metamorphic marine volcanic hydrothermal type, metamorphic syngenetic sedimentary type,syngenetic sedimentary metamorphic hydrothermal reconstruction type, sedimentary metamorphism magmatic hydrothermal superimposed deformation type, and basin hot brine type. The characteristics of the deposits show that they have mostly been controlled by Archean greenstone belt and carbonate rock strata since Early Proterozoic. On the aspect of origin, they are related with submarine activities in eugeosynclines, thermal circulation in the crust at depth, and magmatic activities on the active platform. Their metallogenesis has been influenced by three geotectonic deve lopment stages:1. from the forming to inversion of Archean Early Proterozoic geosyncline; 2. from the forming of the early Mid Proterozoic platform to the emerging of aulacogen; 3. the activating of Mesozoic platform. Their origin pattern has obvious evolution regulation: from Mesozoic marine volcanic hydrothermal deposit at the end of Archean, metamorphic syngenetic deposit and metamorphic hydrothermal reconstruction in Early Proterozoic, to the basin hot brine type deposit in the middle stage of Early Palaeozoic, and in the end evolving into Mesozoic magmatogenic (hydrothermal ,slarn ,continental subvolcanic hydrothermal types) and diplogenetic deposit.