后沟—水泉沟碱性正长岩体的成因及其与金矿成矿的关系

THE GENESIS OF HOUGOU-SHUIQUANGOUALKALI-SYENITE ROCK MASS AND THE RELATION BETWEENIT AND THE MINERALIZATION OF GOLD DEPOSITS

河北省赤城后沟一祟礼水泉沟一带以其众多的金矿床引人注目。但目前对该地区与金矿成矿有关的岩石类型认识颇不一致。本文认为与其有关的岩石类型为碱性正长岩,属印支期至燕山早期侵入的中浅成复式岩体。岩体侵入活动是导致工业矿体就位的主要因素。实践证明,这些认识对该地区的金矿勘查工作有重要的指导意义。

The Hougou - Shuiquangou area, in Chicheng and Chongli counties, Hebei, is very conspicuous for its numerous gold deposits. Up to now, the rock types related with gold deposits mineralization have given ries to much controvery. Based on the research works, we believe that alkali-syenite must be the rock which showed an intimate relationship with the gold deposits mineralization, and it manifests itself as one of the middle-hypabyssal intrusive composite bodies of Indosinian-early Yan-shanian period. The intrusion of alkali-syenite is considered to be the main factor of the ore bodies emplacement. As it is proved in practice that these points of viewes held by us possess important significance in prospecting gold deposits in this area.