铜陵地区成岩成矿背景探讨  

DISCUSSION OF DIAGENETIC AND METALLOGENETIC BACKGROUND IN THE TONGLING AREA

作　　者：陈林杰[1] 吴多元[1] 刘良根[1] 

机构地区：[1]安徽省地质矿产勘查局321地质队,安徽铜陵244033

出　　处：《安徽地质》2007年第1期18-21,共4页Geology of Anhui

摘　　要：铜陵地区是长江中下游多金属成矿带重要矿集区之一,也是我国重要的有色金属基地之一,以盛产铜、金等矿产而闻名于世,尤其是铜矿资源十分丰富,享有中国古铜都之称。铜陵地区内的矿床类型主要为夕卡岩型、层控夕卡岩型,其次为规模小、位于一些矿床深部的斑岩型(铜官山、新桥等),成矿作用与晚中生代(120～140Ma)大规模的岩浆活动有关[1,2]。矿床与侵入岩岩体在空间上密切相关,在时间上与岩体的侵入时间相接近。侵入岩体可划分为碱性系列及钙碱性系列,不是从碱性玄武岩浆直接分异演化而成的,而是底侵的碱性玄武质岩浆与下地壳闪长质岩浆混合、发生AFC过程的产物。构造环境为岩石圈伸展作用下的拉张环境。尽管铜陵地区研究程度很高,但在该区仍有找寻到新的隐伏矿床的可能,本文旨在通过总结前人对该区的研究,为铜陵地区下一步的勘探工作提供科学依据。The Tongling area is one of the important mine clusters in the poly-metallic metallogenetic belt along the middle-lower Yangtze River reaches and is also one of the chief nonferrous metal bases in China. It is world-famous for it＇s teeming with copper, gold and other mineral resources; especially the abundance of copper makes it enjoy the title of ＂copper land＂ in China in ancient times. Ore deposit types in the area mainly include skarns, strata-bound skarns, and secondly, the small-sized porphyry at the depth of ore deposit （such as in Tongguanshan, Xinqiao, etc.）. The mineralization is related to the extensive magmatic activities in the late Mesozoic （120-140Ma） and the ore deposit is closely interrelated to intrusions both in space and time. The intrusions can be divided into alkaline and calc-alkaline series. They are the product of AFC process caused by underplating alkaline basaltic magma mixing with lower crustal dioritic magma, other than the product directly differentiated from alkaline basaltic magma. The tectonic setting is the extensional environment resulted from stretching of lithosphere. It is still possible to find out new hidden ore deposits in the Tongling area though the extent of research has been very high here. This paper aims to summarize the research results already made by geologists in the past and serve as a scientific basis for further exploration in the area.

关 键 词：成岩成矿 铜陵地区 

分 类 号：P618[天文地球—矿床学]