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甘肃省野牛滩矿田的成矿模式研究
投稿时间:2009-04-10  修订日期:2009-06-29  点此下载全文
引用本文:李大民,梁积伟,孙永君.2010.甘肃省野牛滩矿田的成矿模式研究[J].地质学报,84(3):431-438.
lidamin,Liang Ji-Wei,Sun Yong-Jun.2010.The Study on Mineralization pattern of the Yeniutan Ore field, Gansu Province[J].Acta Geologica Sinica,84(3):431-438.
DOI:
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附件
作者单位E-mail
李大民 甘肃省地质矿产勘查开发局第四地质矿产勘查院 gsjqsbddn@163.com 
梁积伟 长安大学地球科学与资源学院 jiweil@chd.edu.cn 
孙永君 甘肃省地质矿产勘查开发局第四地质矿产勘查院 ynivtkd@126.com 
基金项目:本文为国家科技支撑计划(编号2006BAB01A07),国家“973”项目(编号2002CB412607),中国地质调查局地质调查项目(编号 121201066307)资助的成果。
中文摘要:自20世纪60年代以来,在甘肃省野牛滩一带陆续发现了塔儿沟钨矿、清河铁矿、刃岗沟铁矿以及石硐沟银多金属等矿床。文章从野牛滩矿田的地质背景入手,通过对野牛滩岩体及矿田内各矿床的特征分析,总结了矿床的控矿因素、成矿作用和成因类型,在分析矿质来源的基础上,总结出野牛滩矿田的成矿模式。结果表明,各矿床主要受岩体、地层及断裂构造等因素控制,野牛滩岩体是主控因素,是主要成矿作用的引擎和热动力。野牛滩矿田的形成主要经历了两个大的阶段。第一阶段是在古元古代裂陷环境和早古生代板块活动边缘环境中,通过两次不同时期的火山-沉积成矿作用,形成了矿田内主要的矿源层及矿质的局部富集。第二阶段是晚奥陶世,处在岛弧环境下的矿田区域发生了壳熔型岩浆侵入(459.6-441.97Ma)活动,在岩浆作用下,于岩体接触带相继发生了早期的热液交代成矿作用和晚期结晶充填成矿作用。第二阶段是矿田形成的主要阶段,造就了矿田内各矿床的主体。
中文关键词:成矿模式  成矿作用  矿质来源  野牛滩矿田  甘肃省
 
The Study on Mineralization pattern of the Yeniutan Ore field, Gansu Province
Author NameAffiliationE-mail
lidamin No. 4 Geology and Mineral Exploration Team, Gansu Provincial Bureau of Geology and Mineral Exploration and Development gsjqsbddn@163.com 
Liang Ji-Wei Institute of Earth Science and Resources ChangAn University, Xi’an jiweil@chd.edu.cn 
Sun Yong-Jun No. 4 Geology and Mineral Exploration Team, Gansu Provincial Bureau of Geology and Mineral Exploration and Development ynivtkd@126.com 
Abstract:Since the 1960s, many deposits were successively found in Yeniutan area of Gansu Province, such as W, Ag, Fe and so on. Through studying the geological background, stratigraphy, characters of deposits occurred in the Yeniutan area, controlling factors, mineralization, genetic types are summarized. The mineralization modes are concluded on the basis of analysis of mineral source. The result indicates that deposits are mainly controlled by the rock, stratum and faulted structure. Especially, the rocks in Yeniutan area is the chief controlling factor, the engine and dynamic force of mineralization. The formation of the Yeniutan ore field consisted of two periods. In the first period, central mineral source layers formed and minerals concentrated partly in the geological environment of Paleoproterozoic fault and Eopaleozoic plates active margin, through two volcanic sedimentation in different times. In the second period, that is Late Ordovician, the mineral fields in arcuate islands occurred crust-melting magma intrusion(459.6-441.97Ma), early hydrothermally-altered mineralization and late crystal-filling mineraltion due to the promotion of rock. The second period is main time of mineral field formation and the main part of deposits formed.
keywords:Mineralization mode  Mineralization  Mineral source  Yeniutan ore field  Gansu Province
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