铜陵狮子山地区中酸性侵入岩锆石SHRIMP U-Pb定年及岩浆作用的深部过程

吴才来,董树文,国和平,郭祥炎,高前明,刘良根,陈其龙,雷敏

铜陵狮子山地区中酸性侵入岩锆石SHRIMP U-Pb定年及岩浆作用的深部过程

吴才来,董树文,国和平,郭祥炎,高前明,刘良根,陈其龙,雷敏

基金项目:
国家财政部专项，国家自然科学基金，中国地质调查局地质调查项目

刊出日期: 2008-08-31

Zircon SHRIMP U-Pb dating of intermediate-acid intrusive rocks from Shizishan, Tongling and the deep processes of magmatism

WOODEN JL,MAZADAB FK,MATTNSON C,WU CaiLai,DONG ShuWen,GUO HePing,GUO XiangYan,GAO QianMing,LIU LiangGen,CHEN QiLong,LEI Min,WOODEN JL,MAZADAB FK,MATTNSON C

Publish Date: 31 August 2008

摘要

摘要: 铜陵狮子山地区中酸性侵入岩锆石SHRIMP U-Pb定年结果表明,白茫山辉石二长闪长岩、鸡冠山和大团山石英二长闪长岩以及胡村花岗闪长岩的年龄分别为:138.21 ±0.82Ma、139.9 ±1.1Ma、139.3 ±1.2Ma和140.9 ±1.2Ma.岩浆侵位顺序为花岗闪长岩→石英二长闪长岩→辉石二长闪长岩.根据锆石SHRIMP U-Pb年龄变化范围,推测该区岩浆活动持续的时间约为15Ma,且岩浆属脉动式多次侵位,后期岩浆侵位的热使早期岩体中已结晶的锆石发生熔解、重结晶,形成新的锆石.地下深部岩浆活动频繁,形成了多级岩浆房,使得本区的莫霍面界线不明显.
- 中酸性侵入岩 /
- 锆石SHRIMP /
- U-Pb定年 /
- 狮子山 /
- 铜陵

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铜陵狮子山地区中酸性侵入岩锆石SHRIMP U-Pb定年及岩浆作用的深部过程

Zircon SHRIMP U-Pb dating of intermediate-acid intrusive rocks from Shizishan, Tongling and the deep processes of magmatism

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