Geological Features and Genesis of the Jinchang Cu-Au Deposits in Heilongjiang Province
详细信息
- 责任者：Zhao Yusuo (School of Earth Sciences and Resources ; China University of Geoscience ; Beijing 100083 ; China) ; Yan Jiapan
- 刊名：Geology and Prospecting
- 出版年：2013
- 卷期：49(1)
- 关键词：铜矿 ; copper ores ; 金矿 ; gold ores ; 黑龙江省 ; Heilongjiang Province
- 页码：p.75-88
- 图表：illus., 3 tables, 27 refs.
- 分类号：1001
- issnNo：ISSN0495-5331
- isbnNo：CN11-2043/P
摘要
The Jinchang Cu-Au deposit, geographically located in Northeast China and tectonically in the easternmost part of the Xingmeng orogenetic belt, is a super-large gold deposit with a mineralization age between 110 ~ 130Ma. Its gold ore types are mainly breccia and vein types. The typical breccia-type ore body No. J-1 occurs in the breccia pipe No. I in Qiongbangzigou, which displays as a cryptoexplosion breccia pipe with entire pipe mineralization and clear boundaries with wall rocks. The breccia-type ore bodies often appear in clusters and groups, and are equally spaced in an east-west trend. The vein-type ore bodies include ring-like and radiated ore bodies; the vein groups of II and I8 are typical ring-like orebodies; and the vein group III is of a typical radiation pattern. As a whole ring-like ore bodies are distributed as a layered or vein type on the surface and an arc shape on profile, the vein group II is located in the upper part of the magma dome, and the vein group I8 in the lower part. These ring-like orebodies exhibit mineralization zoning outward. The Jinchang gold deposit is situated in the margin of the continental arc setting produced by Pacific plate subduction, and its fluids and ore-forming materials result from the deep source magma. All breccia type and magma-dome type ore bodies show mineralization characteristics of porphyry deposits.