摘要
甘肃李坝金矿区舒家坝组变质岩，经历了３期不同性质构造变形：早期固态塑性流变，发生强烈面状构造置换和等斜褶皱；中期区域褶皱作用，形成一系列开阔褶皱；晚期伸展变形运动，引起断裂、岩浆活动。多期次的构造变形，造成含金建造叠加富集；成矿元素活化、迁移、沉淀。金矿床分布于岩体周围褶皱轴部的断层破碎带中，构造成矿作用显著。
The metamorphic rocks of the Shujiaba Formation at the Liba gold ore area were deformed bythree episodes of deformation with different mechanical properties. The first deformation episode isthe solid state flow which caused the development of foliation transposition and isoclinal folds, andthe second is the regional folding in which stratified rocks were folded to form broad anticlines andsynclines. The third is the extensional stretching which led to faulting and magmatic emplacement.This multiple deformation produced the superposition of gold-bearing strata and the enrichment ofgold deposits. The metallogenic elements were therefore remobilized and precipitated. The gold oresare distributed in the fault zones and the cores of folds around the magmatite. It is obvious that thegeotectonic metallogeny is the major factor in the formation of the Liba gold ore.
出处
《大地构造与成矿学》
EI
CAS
CSCD
1999年第1期29-34,共6页
Geotectonica et Metallogenia
