涞源杂岩体的成矿地质特征及找矿方向

Metallogenic Geological Characteristics of the Laiyuan Complex Rock Mass and Prospecting Direction

涞源杂岩体是中国东部燕山期岩浆岩带的重要组成部分,其成矿作用强烈、成矿作用方式多样,许多矿产地矿床类型为斑岩型、矽卡岩型、热液型等"多型一体",成矿元素Mo、Cu、Fe、Pb、Zn、Au、Ag等共伴生。该杂岩体内已查明大型矿产地4处、中型矿产地5处,是河北省有色金属的主要集聚区。高侵位的超浅成闪长玢岩、流纹斑岩等小岩株控制了斑岩型铜钼矿,中深成中酸性侵入岩与矽卡岩型、热液型铁铜铅锌金等多金属成矿关系密切,断裂构造、接触带构造是主要的控矿构造,赋矿围岩对成矿有一定的控制作用,钙矽卡岩与铜矿、镁矽卡岩与铁铅锌矿多金属关系密切。同时,本文对斑岩型、矽卡岩型、热液型-矽卡岩叠加型、热液型等典型矿床特征进行了综述,并指出了今后涞源杂岩体的找矿勘查方向。

The Laiyuan complex rock mass is an important part of the Yanshanian magmatite belt in eastern China, which hosts intense diverse miner- alization evidenced by many types of ore deposits such as porphyry, skarn, and hydrothermalones, called ＂ integration of multiple types＂. The accompan- ying ore - forming elements are molybdenum, copper, iron, lead, zinc, gold, silver and so forth. Four large and 5 medium sized mineral deposits have been identified, which are the main concentration areas of nonferrous metals in Hebei province. The porphyry copper - molybdenum deposits are controlled by the hypabyssal diorite porphyry of high mnplacement, rhyolite porphyry and other small rock stocks. The intermediate acid intrusive rocks which were emplaced in media of shallow crust are closely related with skaru and hydrotherm iron, copper, lead, zinc, gold and other metals. Fault and contact zones are the main ore - control structures, and the ore - hosting rocks have also some control on mineralization. There is a close relationship between calcium skarn and copper ore, magnesium skarn and iron - lead - zinc polymetal. At the same time, this paper presents a review on characteristics of various ore deposits, including porphyry, skarn, hydrothermal and skarn superimposition, and hydrothermal types, and points out the prospecting direction of the Laiyuan complex rock mass in the future.