西北地质Issue(4)：160-167,8.
西秦岭小沟里金矿、三洋坝金矿成矿环境演化与成矿模式探讨
Mineralization Environment Evolution and Metallogentic Model of Xiaogouli and Sanyangba Gold Deposits in Western Qinling
摘要
Abstract
Xiaogouli and Sanyangba gold deposits of western Qinling are located at the mid-west-ern of XichengPb-Zn ore-field,Huicheng Basin. Based on the previous research data,the miner-alization environment evolution of these two deposits has been analyzed and studied inthis paper systematically,including stratum,structure and granitic magma. And then,the metallogenetic model has been summarized. For these two gold deposits,the ore bodies are occurred in the up-per section of the Xihanshui Formation in the middle Devonian that dominate by chlorite sericitephyllite. And these two deposits are metamorphic hydrothermal deposits caused by early sedimentary metamorphism and magmatic hydrothermal superimposed transformation inearly Yanshan period. The mineralization period had experienced the closure,uplift and orogenic sta-ges of the Huicheng basin,which are consistent with the tectonic evolution stages of collisional o-rogeny and continental thrust in the Qinling Mountains orogenic belt.On the whole,the ore bodies are distributed along the stratum,and are controlled jointly by a set of intermediate-acid and calcium-alkalinestratiform granite porphyry,as well as the NW-trending ductile structure zone. In the tectonic environment of intra-continental thrust and pressure torsion,the ore-bearing strata and ore bodies show slightly wavelikein strike and dip. By the reconstruction of the late ex-tensional and shear structures,the ore bodiesare thickening and the gold grade is increased.This paper provide geological basis for studying the mineralization regularity of Huicheng basin,and the resource integration of mine periphery for mine enterprise.关键词
成矿环境/成矿模式/小沟里金矿/三洋坝金矿/西秦岭Key words
mineralization environment/metallogenetic model/Xiaogouli and Sanyangba gold de-posits/Western Qinling分类
天文与地球科学引用本文复制引用
丁高明,卢树东,祁小军,张永强,闫常魁,李帅..西秦岭小沟里金矿、三洋坝金矿成矿环境演化与成矿模式探讨[J].西北地质,2015,(4):160-167,8.基金项目
中国黄金集团公司地质探矿增储项目(201497) （201497）
