澳大利亚拉克兰造山带成矿地质条件与主要矿化类型  

Metallogenic geological setting and major mineralization types in the Lachlan fold belt, Southeast Australia

作　　者：张定源[1] 姚仲友[1] 王天刚[1] 汪传胜[2] 肖娥[2] 

机构地区：[1]中国地质调查局南京地质调查中心,江苏南京210016 [2]江苏省有色金属华东地质勘查局,江苏南京210007

出　　处：《地质通报》2014年第2期255-269,共15页Geological Bulletin of China

基　　金：中央地勘基金项目(编号:201130D06200123);中国地质调查局项目(编号:1212011120325)

摘　　要：澳大利亚拉克兰造山带(又称拉克兰褶皱带,简称LFB)由强烈变形的寒武纪—泥盆纪深海沉积岩、燧石和基性火山岩,以及更年轻的盖层所构成,其造山过程表现为澳大利亚板块向东南方向不断增生的过程。该造山带的长期演化,形成了以维多利亚金矿省为典型代表的造山型金矿床及其它类型的多金属矿床,本质上这些矿床的形成与特殊的成矿地质条件密切相关。对该区相关文献进行分析和总结,提炼出拉克兰造山带金及多金属矿床的主要地质特征,划分出5种主要矿化类型:造山型金矿、花岗岩中细脉浸染型钨—锡矿、斑岩型铜—金矿、火山喷流铜—锌—金硫化物矿床、产于断陷盆地沉积岩中的铜—铅—锌—金矿。5种矿化类型各具特色,空间上有规律性地分布。The Lachlan Fold Belt （LFB） of eastern Australia is composed of deformed deep-marine sedimentary rocks （quartz-rich turbidites）, cherts, and mafic volcanic rocks of Cambrian-Devonian period as well as younger continental cover sequences. In the southeast-verging accretionary process of the Australia plate, a lot of gold and polymetallic deposits were formed in LFB, particularly the orogenic lode gold in central Victoria, which represents a major gold province with a total output of 2500t of gold, or over 2% of total world output. In addition to gold, the mineralizations of Cu, Pb, Zn, W, Sn and Mo are also well developed in this belt. Five distinctive mteallogenic types have been recognized, and the mineralizations are closely related to the special geological setting. In this paper, wide range of opinions, descriptions and relevant data concerning the Lachlan Fold Belt are meticulously put to order, compared, analyzed and summarized, and metallogenic geological settings of gold and polymetallic deposits, major mineralization types and their geological features are discussed in detail.

关 键 词：拉克兰造山带 板块增生 维多利亚金矿省 造山型金矿 矿化类型 

分 类 号：P611[天文地球—矿床学]