摘要
本文通过对大水清金矿田各种构造型式的综合研究，阐明了矿田内北东向、北西向和北北东向断裂的活动次序，论证了矿田内斑状花岗岩体形成时的北西向古断裂（Ｆ３）的运动学特征及斑状花岗岩体内早期脉岩墙形成时的矿田应力场方向；通过研究矿田内北北东向断裂的展布特点、相对位移方向和对安家营子矿区内节理构造的统计，恢复了安家营子矿区成矿构造应力场，并探讨了矿田成矿构造的形成机制和形成时代，这一研究对于指导矿田内的金矿成矿预测有一定实际意义。
On the basis of comprehensive study on the structures of various forms in Dashuiqing gold orefield, this paper expounds the active sequence of NE-trending, NW-trending and NNE-trending fractures in the orefield,and evidences the sinistral wrench features of the ancient NW-trending fault (F3) when the porphyritic granite body was formed and the orientation of maximum compressive princippal stress when the early vein dikes were developed. According to the distribution feature and relative wrench direction of the NNE-trending fractures and the joint statistics of Anjiayingzi mineral district in Dashuiqing orefield, the oreforming tectonic stress field of Anjiayingzi mineral district has been reconstructed, and the forming mechanism and formation age of ore-forming fractures in the orefield have been discussed as well. This study is of great practical significance for gold exploration in the orefield.
出处
《大地构造与成矿学》
EI
CAS
CSCD
1995年第2期178-187,共10页
Geotectonica et Metallogenia
关键词
金矿田
构造应力场
形成机制
金矿床
Dashuiqing gold orefield, tectonic stress field, tectonic formation mechanism.
