层控矿床及其深部找矿问题——以铜陵铁、铜、硫(金)矿田为例  

STRATA-BOUND DEPOSITS AND PROBLEMS OF THEIR EXPLOITATION AT DEPTHS AS EXEMPLIFIED BY THE TONGLING Fe-Cu-S-Au FIELD

作　　者：朱上庆[1] 

机构地区：[1]武汉地质学院北京研究生部

出　　处：《地球化学》1987年第1期36-39,共4页Geochimica

摘　　要：层控矿床是在特定的大地构造、沉积环境、岩浆活动、变质作用、热液活动等相互作用下所形成的矿床。由于我国大地构造-岩浆活动以及沉积建造在时间和空间分布上具有多旋回性,因而我国层控矿床也具多发性和多旋回性。这对于深部找矿,有重要的指导意义。 铜官山矿床的“三结合”组合特征是在统一的成矿过程中,受不同岩性及构造条件所制约的。中部层控矽卡岩型矿化不仅在铜官山矿床中占主要地位,在铜陵地区也占主导地位。该区的深部找矿经验还指出,层控矿床具有明显的“时控”特征,并具有多发性和多旋回性。因而,在一个成矿区中,层控矿床有多次出现的可能。Strata-bound deposits are those formed in special geotectonic and sedimentary environments under the combined action of igneous activity, related metamorphism and hydrothermal activity. The temporal and spatial distributions of geotectonic-igneous activities and sedimentary formations in China show an obvious polycyclicity, and therefore the temporal and spatial distributions of strata-bound deposits in China are also possessed of polygenesis and polycyclicity. This finding is of great importance for searching for strata-bound deposits at depths.The 'three-in-one' assemblage in the Tongguanshan deposit was formed under different lithological and tectonic conditions through a general mineralization process. The strata-bound skarn mineralization in the middle part of the Tongguanshan deposit is predominant not only in Tongguanshan but in the Tongling area as a whole.Our experience in exploiting ore deposits at depths in this area shows that strata-bound deposits are distinctly time-bound and also possess polygenetic and polycyclic characteristics. Therefore, strata-bound deposits may appear repeatedly in a single metallogenetic field or belt.

关 键 词：层控矿床 深部找矿 大地构造 沉积环境 岩浆活动 变质作用 

分 类 号：P61[天文地球—矿床学]