德尔尼铜矿床矿石特征及其对矿床成因的指示(增刊)

德尔尼铜矿矿床是布青山—积石山铜多金属成矿带重要的典型矿床。矿床成因一直是该区研究的焦点之一。受晚古生代以来的压性构造变形作用影响,整体呈北西-南东向展布。这种构造应力作用在矿石中也有所体现,并反映在矿石的结构和构造中。这对于研究成矿期次和矿床成因具有重要意义。本文通过研究德尔尼铜矿床矿石的野外和镜下特征,认为德尔尼铜矿成矿作用期次可分为黄铁矿第一阶段(PyI)、黄铜矿及磁铁矿阶段(CcpI Mag)、黄铁矿第二阶段(PyII)及后期黄铜矿阶段(CcpII)四个主要阶段。结合前人对控矿要素的分析,认为德尔尼铜矿矿床类型是深部熔离—构造侵位型。

The Characteristic of the Ore of Deerni Coppe Deposit and its Indication of Genesis of Mineral Deposit

Derni copper deposit is a significant deposit in Buqingshan-Jishishan polymetallic mineralization belt. The genesis of the deposit is one of the research focus. Due to the compressional structure since the Late Paleozoic Era, the deposit distributes in NW-SE. The compressional structure can be also found in the texture and structure of the ore, which is of great importance to study the period of mineralizing and mineralization. The period of mineralizing of Deerni deposit can be divide into four stages as PyI, CcpI Mag, PyII and CcpII basing on the characteristic of the ore. Considering the factors of the ore-controlling, we consider Deerni deposit as a deep liquation- tectonic emplacement deposit.