角闪石全铝压力计对黄陵岩体古隆升速率的研究  

The Ancient Uplift Rate Study of Huangling Pluton Based on Al-in-hornblende Barometer GONG Song-lin

作　　者：龚松林[1] 

机构地区：[1]中国地质大学(武汉)地球科学学院,湖北武汉430074

出　　处：《东华理工学院学报》2004年第1期52-58,共7页Journal of East China Institute of Technology

基　　金：中国石化股份有限公司科研项目 ;鄂西渝东海相油气的构造控制与保存条件研究(P0 2 0 0 9)

摘　　要：采用矿物化学分析和角闪石全铝压力计方法 ,得到黄陵岩体中黄陵庙花岗闪长岩和三斗坪英云闪长岩的结晶压力为 4.2 3× 10 8Pa和 4.60× 10 8Pa ,对应的侵位深度为 14 .6km和 15 .8km ;结合已有的岩石年龄资料 ,可以得到新元古代黄陵岩体的古隆升速率约为 0 .0 9km/Ma。结果表明 ,黄陵岩体在形成过程中 ,基底伴随有缓慢的隆升剥露。Mineral chemistry analysis and Al-in-hornblende barometer are employed to investigate the Huangling pluton in this paper. As a result, the crystallization pressures of huanglingmiao granodiorite and sandouping tonalite from huangling pluton are obtained 4.23×10~8 Pa and 4.60×10~8 Pa respectively, and the corresponding intrusive depths are 14.6 km and 15.8 km. Combined with the presented age of magmatic crystallization, the ancient uplift rate of huangling pluton in late Proterozoic can be calculated as nearly 0.09 km/Ma. The results indicate that huangling pluton is subjected to slowly uplift and denudation during it’s intrusion and formation.

关 键 词：角闪石全铝压力计 黄陵岩体 古隆升速率 形成 岩体地质 

分 类 号：P585[天文地球—岩石学]