| 东天山三岔口铜矿区矿化岩体SHRIMP U-Pb年代学及锶同位素地球化学特征研究 |
| |
| 关键词:Sanchakou deposit SHRIMP U-Pb age strontium isotopes East Tianshan Mountains |
| 基金项目:国家重点基础研究发展规划项目(编号:G1999043201和2001CB40910)，国家科技攻关计划“新疆优势矿产资源勘查综合研究”(编号:2001BA609A0718) |
|
| 摘要点击次数: 2851 |
| 全文下载次数: 2589 |
| 摘要: |
| Zircon SHRIMP U-Pb Age and Strontium Isotopes of Mineralized Granitoids in the Sanchakou Copper Polymetallic Depoist,East Tianshan Mountains |
| Zircon SHRIMP U-Pb dating and strontium isotope analyses of granites and copper-bearing quartz veins show that the mineralized plagiogranite porphyry in the Sanchakou deposit of East Tianshan Mountains has an emplacement age of 278±4 Ma(95% Conf.),which means that the rock-forming and ore-forming event took place during early-middle Permian. The( 87 Sr/ 86 Sr)_ i values of mineralized plagiogranite porphyry,tonalite(porphyry)and copper-bearing quartz veins are consistent in test errors,ranging from 0.70370 to 0.70437,and the calculated ε_ Sr ( t )values vary from -8.5 to +2.7,showing that the mineralized intrusions are I-type granitoids and might have been derived from the upper mantle. |
| LI Hua-qin,CHEN Fu-wen,LU Yuan-fa,YANG Hong-mei,GUO Jing,Mei Yu-ping.2004.Zircon SHRIMP U-Pb Age and Strontium Isotopes of Mineralized Granitoids in the Sanchakou Copper Polymetallic Depoist,East Tianshan Mountains[J].Acta Geoscientica Sinica,25(2):191-195. |
| 查看全文 查看/发表评论 下载PDF阅读器 |