收藏本站
收藏 | 手机打开
二维码
手机客户端打开本文

A Jurassic peraluminous leucogranite from Yiwul(u|¨)shan,western Liaoning,North China craton:age,origin and tectonic significance

SIMON A.WILDE  
【摘要】:正The Gangjia granite stock is a garnet-bearing muscovite leucogranitic body emplaced in Yiwulushan in Western Liaoning Province at the eastern segment of the Yanshan orogenic belt, North China craton.The SHRIMP U-Pb zircon age is 153±5 Ma.The Gangjia granites are peraluminous with A/CNK of more than 1.14,and exhibit a tetrad effect in their REE distribution patterns,as well as non-charge-and-radius-controlled trace element behaviour.This is in contrast to the LREE-enriched patterns of the host Liishan monzogranites.These geochemical characteristics, together with low Th/U ratios in zircon,suggest that the parental magmas for the Gangjia granites have experienced extensive magmatic differentiation,including interaction between residual melt and a coexisting high-temperature aqueous fluid.Their similarε_(Nd)(t),model ages,compatible age patterns and common volcanic arc signature in source materials between the Gangjia granites and the host L(u|¨)shan monzogranites indicate their comagmatic relationship.These unusual peraluminous leucogranites,coupled with the voluminous adakitic granites hosting them,represent typical postorogenic magmatism developed under an intra-continental extensional tectonic regime.At the very end of the prolonged Jurassic magmatic evolution in Western Liaoning,extensive fractionation of most probably ferromagnesian phases and plagioclase from a calc-alkaline magma parental to the host L(u|¨)shan pluton,with overprint of the magmatic hydrothermal fluid,produced highly evolved peraluminous parental magmas for the Gangjia granites.

知网文化
【相似文献】
中国重要会议论文全文数据库 前10条
1 SIMON A.WILDE;;A Jurassic peraluminous leucogranite from Yiwul(u|¨)shan,western Liaoning,North China craton:age,origin and tectonic significance[A];中国科学院地质与地球物理研究所2008学术论文汇编[C];2009年
2 ;large-scale cluster of gold deposits and metallogenesis in The eastern North China craton[A];中国科学院地质与地球物理研究所2002学术论文摘要汇编[C];2002年
3 Asaf Raza;Kyoungwon Min;Barry P.Kohn;Peter W.Reiners;Richard A.Ketcham;Andrew J.W.Gleadow;;Late Mesozoic and Cenozoic thermotectonic evolution along a transect from the north China craton through the Qinling orogen into the Yangtze craton,central China[A];中国科学院地质与地球物理研究所2006年论文摘要集[C];2007年
4 Suzanne O'Reilly;Richard J.Walker;William Griffin;Norman Pearson;;Diachronous decratonization of the Sino-Korean craton:Geochemistry of mantle xenoliths from North Korea[A];中国科学院地质与地球物理研究所第十届(2010年度)学术年会论文集(上)[C];2011年
5 ;Insight into craton evolution:Constraints from shear wave splitting in the North China Craton[A];中国科学院地质与地球物理研究所2008学术论文汇编[C];2009年
6 Richard E.Ernst;;A 1.78 Ga large igneous province in the North China craton:The Xiong'er Volcanic Province and the North China dyke swarm[A];中国科学院地质与地球物理研究所2008学术论文汇编[C];2009年
7 ;Palaeoproterozoic tectonic history of the North China craton:a review[A];中国科学院地质与地球物理研究所二○○三学术论文汇编·第一卷(地球动力学)[C];2003年
8 ;Early Devonian alkaline intrusive complex from the northern North China craton:a petrological monitor of post-collisional tectonics[A];中国科学院地质与地球物理研究所第十届(2010年度)学术年会论文集(上)[C];2011年
9 ;Lithium isotopic composition of subduction-related leucogranites and associated rocks from the northern margin of the North China craton:Source tracking and tectonic implications[A];中国矿物岩石地球化学学会第13届学术年会论文集[C];2011年
10 SIMON A.WILDE;;Contrasting Middle Jurassic and Early Cretaceous mafic intrusive rocks from western Liaoning,North China craton:petrogenesis and tectonic implications[A];中国科学院地质与地球物理研究所第十届(2010年度)学术年会论文集(上)[C];2011年
中国知网广告投放
 快捷付款方式  订购知网充值卡  订购热线  帮助中心
  • 400-819-9993
  • 010-62982499
  • 010-62783978