中甸弧碰撞造山作用和岩浆成矿系统
  修订日期:2001-07-30  点此下载全文
引用本文:杨岳清,侯增谦,黄典豪,曲晓明.2002.中甸弧碰撞造山作用和岩浆成矿系统[J].地球学报,23(1):17-24.
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作者单位
杨岳清 中国地质科学院矿产资源研究所北京100037 
侯增谦 中国地质科学院矿产资源研究所北京100037 
黄典豪 中国地质科学院矿产资源研究所北京100037 
曲晓明 中国地质科学院矿产资源研究所北京100037 
基金项目:原地质矿产部“九五”攻关项目“义敦岛弧带构造演化与多金属矿产成矿规律研究”项目(950200104)
中文摘要:中甸弧位于西南三江构造火成岩带义敦岛弧的南端,它的演化经历了洋壳俯冲(210-235Ma)、陆陆碰撞(80-88Ma)和陆内汇聚(28Ma)三大造山作用。在俯冲造山作用中产生了浅成-超浅成斑、玢岩,并发育了与之有关的斑岩型、夕卡岩型、浅成低温热液脉型铜多金属矿床。在碰撞造山作用中形成了与后造山黑云母花岗岩和与之有关的蚀变花岗岩型、石英脉型钨-钼矿床。在陆内汇聚造山作用中产生了深源正长岩类和与之有关的斑岩型金矿。火成岩类型和成矿作用的多样化表明,在中甸弧中具有广阔的找矿前景。
中文关键词:岛弧  碰撞造山  岩浆热液矿床  中甸
 
Collision Orogenic Process and Magmatic Metallogenic System in Zhongdian Arc
Abstract:The Zhongdian arc is located at the southern end of Yidun island arc in the Sanjing tectono magmatic zone. Its evolution involved ocean crust subduction orogeny (210~235 Ma), continental block collision (80~88 Ma) and convergence orogenics of continental margins (28 Ma). Supergene porphyrites and porphyries were formed in the process of subduction orogeny. Porphyry type deposits, skarn type deposits and supergene low temperature hydrothermal deposits are closely related to magmatic intrusion of porphyrites and porphyries. I type biotite granites and related Mo W deposits of quartz vein type and altered granite type were formed during continental block collision orogenics. Anatectic syenites and related Au deposits were formed in convergence orogenics of continental margins. Diversities of magma types and mineralzations demonstrate that there exist wide prospects in search for mineral deposits in Zhongdian arc.
keywords:island arc  collision orogenics  magmatic hydrothermal deposit  Zhongdian arc
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