西藏中拉萨地块隆格尔铁矿床含矿花岗闪长岩锆石U-Pb-Hf同位素和矿物化学组分研究（英文）

论文摘要

隆格尔铁矿床隶属班公湖-怒江成矿带,位于青藏高原的中拉萨地块内。在隆格尔矿床中,铁矿化发育于早白垩系花岗闪长岩和晚二叠系下拉组灰岩的矽卡岩化接触带上。本文报道了地早白垩系花岗闪长岩（119 Ma）的锆石U-Pb-Hf同位素和矿物化学组分特征。基于锆石微量元素和角闪石、黑云母的化学组分,计算了岩体形成时的压力、温度、氧逸度和水成分。结果显示,早白垩系花岗闪长岩形成于高温（>700°C）、低压（100-100 MPa）、高氧逸度（-13.6～-13.9）的环境中。锆石Hf同位素和黑云母化学组分显示,花岗闪长岩中有明显年轻幔源成分混入。较高的氧逸度和浅的形成环境有利于铁矿化的形成,说明隆格尔铁矿床具有较好的找矿潜力。

论文目录

• 1 Introduction
• 2 Geological setting and petrography
• 3 Deposit geology
• 4 Sampling and methods
• 5 Zircon U-Pb-Hf isotopes
• 6 Discussion
•   6.1 Physico-chemical crystallization conditions
•     6.1.1 Geothermobarometry for temperature andpressure
•     6.1.2 Oxygen fugacity and H2O content
•   6.2 Implications for tectonic and mineralization processes
• 6 Conclusions

文章来源

类型: 期刊论文

作者: 张云辉,王杨双,王文澍,刘洁,袁玲玲

关键词: 锆石同位素,矿物化学组分,结晶环境,隆格尔铁矿床,中拉萨

来源: Journal of Central South University 2019年12期

年度: 2019

分类: 工程科技Ⅱ辑,基础科学,工程科技Ⅰ辑

专业: 地质学,矿业工程

单位: Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring,Ministry of Education, School of Geoscience and Info-physics, Central South University,Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University,State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, College of Environment and Civil Engineering, Chengdu University of Technology

基金: Project(2018YSJS14)supported by the Open Research Fund Program of Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring(Central South University),Ministry of Education,China

分类号: P618.31;P588.12;P597.3

页码: 3457-3469

总页数: 13

文件大小: 934K

下载量: 30