朝阳北部早前寒武纪变质杂岩地质事件序列

CORC > 北京大学 > 地球与空间科学学院

	朝阳北部早前寒武纪变质杂岩地质事件序列; Geological events of Early Precambrian complex in North Chaoyang area, Liaoning Province.
	刘树文 ; 王伟 ; 白翔 ; 张帆 ; 杨鹏涛
刊名	岩石学报
	2010
关键词	LA-ICP-MS LA-ICP-MS Zircon chronology Geological events Early Precambrian complex North Chaoyang area 锆石年代学地质事件序列早前寒武纪变质杂岩朝阳北部
英文摘要	朝阳北部早前寒武纪变质杂岩是华北克拉通北缘承德-阜新变质地块的一个重要组成部分,主要由一套变质火山岩、火山碎屑岩及其相伴生沉积岩等表壳岩组成,被TTG片麻岩、辉长岩和石英闪长岩等深成侵入体侵位。这些表壳岩和深成侵入体均经历了高角闪岩相变质作用。表壳岩中石榴石斜长角闪岩(CY004-3),其原岩岩浆结晶年龄为2513～2520Ma,遭受了2447Ma变质作用改造。石榴石透辉石斜长角闪岩(CY006-6),其原岩岩浆结晶年龄2481～2568Ma,记录了～2400Ma变质事件。小角度切割变质火山岩和磁铁石英岩的早期二长花岗质片麻岩脉体,岩浆结晶年龄为2496～2501Ma,表明这些变质火山岩的岩浆...; Early Precambrian complex in North Chaoyang area, Liaoning Province, is an important part of the Chengde-Fuxin metamorphic block, in the northern margin of the North China Craton and consists mainly of supracrustal rock sequence of metamorphic volcanic rock, volcaniclastic rock and related sedimentary rock series, which were emplaced by TTG, gabbro and quartz diorite. These supracrustal rock sequence and paleopluton experienced high-grade amphibolite facies metamorphism. LA-ICP-MS zircon U-Ph isotopic dating reveals that the volcanic protolith of garnet plagioclase amphibolite (sample CY004-3) erupted at 2513 similar to 2520Ma and was metamorphosed at 2447Ma, and the volcanic protolith of garnet diopside plagioclase amphibolite (CY006-6) erupted at 2481 similar to 2568Ma, which shows also similar to 2400Ma metamorphic age. A metamorphic monzogranitic dyke that cuts the metamorphic layered rock series in the supracrutal rock sequence in the small angle is also dated and yields magma emplaced age of 2496 similar to 2501Ma, which suggests the metamorphic supracrustal rock sequence formed before 2500Ma. Some paleoplutons, emplaced into the supracrustal rock sequence, sign an important magmatic event in the Early Paleoproterozoic era. A garnet pyroxene plagioclase amphibolite (sample CY004-4) has its protolith of gabbro, and yields a magmatic crystallization age of 2394Ma and also preserves a metamorphic age of 2354Ma. A biotite hornblende plagioclase gneiss (sample CY005-1) has its protolith of quartz diorite, and yields a magma crystallization age of 2403Ma. Metamorphic gabbroic diabase (sample CY014-1) gives its magma crystalline age of 2399 similar to 2404Ma. The supracrustal rock series were metamorphosed in the high-grade amphibolite facies during Paleoproterozoic era (2350 similar to 2460Ma), which are synchronous with the emplacement of the Paleoproterozoic paleoplutons. These zircon U-Pb isotopic dating results reveal that a large scale volcanic eruption of mafic magma occurred at the end of the Archean, and main metamorphism in the high-grade amphibolite facies and synchronous plutonism occurred at Paleoproterozoic era (2350 similar to 2460Ma).; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000280658100003&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; SCI(E); 中文核心期刊要目总览(PKU); 中国科技核心期刊(ISTIC); 中国科学引文数据库(CSCD); 20; 07; 1993-2004; 26
语种	中文
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/179465]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	刘树文,王伟,白翔,等. 朝阳北部早前寒武纪变质杂岩地质事件序列, Geological events of Early Precambrian complex in North Chaoyang area, Liaoning Province.[J]. 岩石学报,2010.
APA	刘树文,王伟,白翔,张帆,&杨鹏涛.(2010).朝阳北部早前寒武纪变质杂岩地质事件序列.岩石学报.
MLA	刘树文,et al."朝阳北部早前寒武纪变质杂岩地质事件序列".岩石学报 (2010).