银洞坡层控金矿的矿田构造及其控矿作用辨识

Recognition on Structure and Its Ore-Controlling in Stratified Yindongpo Au Deposit

本文客观地分析了野外和室内研究资料后指出,银洞坡大型金矿所在的河前庄背斜连同该背斜转折端和两翼所发育的各种平移断层、平移正断层、逆冲断层均形成于主成矿期之后,不具前人所认定的控矿意义,其演化系列是:河前庄背斜→含矿共轭平移断层→无矿共轭平移断层→平移正断层→逆冲断层系,除含矿共轭平移断层之外,它们主要起改造矿体的作用。其中河前庄背斜起有利的改造作用,而各类断层主要起破坏作用。

Based on the objective analysis of field and laboratory data, the authors suggest that the Heqianzhuang anticline in which the large-scale Yindongpo Au deposit is located as well as the various strike-slip shear faults, strike-slip normal faults and thrust faults developing in the higne and limbs of the anticline formed after the formation of main ore protolith, and had no ore-controlling significance as previous work suggested. The structure formation se-quenoe is as follows: Heqianzhuang anticline→ore-hearing conjugate strike-slip faults→no ore-hearing conjugate strike-slip faults→strike-slip normal faults→thrust fault series. All these stractures, except for ore-hearing conjugate strike-slip faults, transformed the ore bodies with Heqianzhuang antidine's constructive and other structures' destructive processes.