Zircon SHRIMP U-Pb Geochronology,Petrology and Geochemistry of the Zhujianshui Granite,Qitianling Pluton,Southern Hunan Province
Zircon SHRIMP U-Pb Geochronology,Petrology and Geochemistry of the Zhujianshui Granite,Qitianling Pluton,Southern Hunan Province
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发表时间：
2005
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通讯作者：
Zhu Jinchu
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作者：
Zhu Jinchu
骑田岭岩体朱间水花岗岩是60年代初S用黑云母K-Ar法同位素测定侵位年龄的花岗岩之一，此后多年来一直被认为是印支期(三叠纪)花岗岩。本文对骑田岭岩体朱间水花岗岩的锆石SHRIMP U-Pb年代学、岩石学和地球化学进行了研究。获得了160±2 Ma的侵位年龄，表明燕山早期(侏罗纪)岩浆活动。朱建水花岗岩富碱(尤其是富K)、LILE和HFSE，具有地幔-地壳混合源。它形成于南中国大陆内部的后造山伸展环境。
The Zhujianshui granite of Qitianling pluton is one of the granites whose emplacement age was determined isotopically by biotite K-Ar method during the early 1960's. Since then the Qitianling granitic pluton was considered to be Indosinian (Triassic) for many years. This paper studies the zircon SHRIMP U-Pb geochronology, petrology and geochemistry of the Zhujianshui granite, Qitianling pluton. An emplacement age of 160±2 Ma was obtained which indicates an early Yanshanian (Jurassic) magmatic activity. The Zhujianshui granite is enriched in alkalies (especially in K), LILE's and HFSE's, and has a mantle-crustal mixed source. It was formed under a post-orogenic extensional environment within the South China continent.