胶东新型金矿—层间滑动角砾岩型金矿床

在胶东地区胶莱盆地北缘新近发现了一种受滑税构造控制的新型金矿床－层间滑动角砾岩型金矿床。以对蓬家夼金矿，郭城金矿和发云夼金矿的研究为基础，结合国内外有关滑脱构造的研究，分析了层间滑动角砾岩型新型金矿的地质特征及矿床地质特征，提出了3点新认识：（1）层间滑动角砾岩型金矿是在盆地的长期演化过程中形成的，经历了从伸展－挤压－走滑的构造环境，在盆地的伸展过程中形成层状矿体；在后期的压扭过程中发生构造富集，形成工业矿体；（2）滑脱构造沉积盆地的不同地域控制着不同的成矿类型，构成了完整的层间滑动角砾岩型金矿成矿系列；（3）指出了层间滑动角砾岩型金矿的定型依据和初步鉴别标志。

INTERLAYER-SLIDE-BRECCIA GOLD DEPOSIT --A NEW TYPE OF GOLD DEPOSIT DISCOVERED IN JIAODONG REGION

A new type of gold deposit-interlayer-slide-breccia gold deposit, controlled by detachment structure , was discovered recently along the northeast boundary of the Jiaolai Basin in Jiaodong region. Based on studies on Pengjiakuang, Guocheng and Fayunkuang gold deposits and other existing research deposits related to detachment structure at home and abroad, this paper introduces the geological and metallogenic characteristics of this type of gold deposit-interlayer-slide-breccia gold deposit. Three important conclusions were deduced. Firstly, the interlayer-slide-breccia gold deposit is resulted from a secular evolution of the basin, which had experienced extension, compression and slip. Stratiform ore deposits were formed during the extension of the basin, enriched structurally in the latter compression stage, and became industrial ore bodies. Secondly, different metallogenic types were controlled by the detachment happened in different parts of the sedimentary basin, and therefore, produced a whole series of interlayer-slide-breccia type of gold metallogenic deposits. Finally, the typified criteria and keys of primary identification of the interlayer-slide-breccia gold deposit are discussed.