蓟县盘山花岗岩岩体成矿地质特征研究

Research on metallogenic and geological characteristics of Panshan granite body in Jixian county of Tianjin city

文章通过对蓟县盘山地区已有的1∶5万区域地质调查、物化探资料和大比例尺的矿山勘查资料进行综合研究,发现盘山岩体的矿化类型在空间上呈现规律性分布,矿化几乎全部集中于岩体与围岩的内外接触带上。矿化具有水平分带性,岩体内带发育有中高温含钨石英脉型小型矿床,岩体边部外接触带内侧发育夕卡岩型的磁铁矿、含铜磁铁矿等,岩体外接触带外侧发育有夕卡岩型钼、铜矿,岩体外接触带最外侧发育有热液型铅锌、银矿等。盘山岩体的成矿作用主要受温压条件控制,并受制于含矿溶液性质、构造条件和围岩条件,成矿具有多阶段性和多期性。

Comprehensive study on regional geological survey at scale 1∶50000and geophysical and geochemical survey at large scale and prospecting data of some mines show regular spatial distribution of mineralization types at Panshan granite body.Almost all the types are concentrated at inner or outer contact zones between the granite and enclosing rock.The mineralization is zoned horizontally.The small medium-high temperature tungsten bearing quartz vein type deposits are developed at the inner contact zone,the skarn type magnetite and cupreous magnetite etc at the outer contact zone,the skarn type molybdenum、copper at outside of the outer contact zone,hydrothermal type lead zinc、silver etc at outermost side.The mineralization of Panshan granite body is mainly controlled by the temperature and pressure conditions then by ore fluid property and the structural and wall rock conditions.The mineralization is formed in multi-stages.