磁组构分析在韧性变形带研究中的应用

Application of Magnetic Fabric Analysis to the Ductile Deformation Belt in the Tuwu Copper Deposit, East Tianshan,Xinjiang

本文系新疆东天山土屋铜矿一带韧性变形带磁组构研究成果。笔者通过该区 6 0 0km2 系统的磁组构测量工作 ,查清了韧性变形带的结构和变形特征以及土屋大型铜矿床产出的构造部位 ,为找矿工作的区域展开提供了比较确切的构造背景资料。从而表明 ,磁组构分析方法在韧性变形带研究中是行之有效的方法手段之一。

Based on the measurement of 600 km 2 magnetic fabrics in the Tuwu copper deposit, East Tianshan Mountains, Xinjiang, the authors divided the study area into the southern strong ductile deformation domain and the northern weak domain according to va lues of the magnetic anisotropy. The measurement results show that the southern deformation domain is dominated by flasers, while the northern one is characterized by plane strain and contraction strain besides the flasers. It is pointed out that the ductile deformation belt consisting of a series of parallel compressive schistosities is a ductile compressive belt derived from coaxial deformation instead of a ductile shear belt. The Tuwu, Yandong and Linglong copper deposits and the Longxi gold ore spot occur in the local small deformation zones of the northern weak deformation domain, showing the marginal ore forming features in the regional large ductile compressive belt.