Magma Replenishment as Revealed by Textural and Geochemical Features of Plagioclase Phenocrysts in Subduction-Related Lavas

doi:10.1111/1755-6724.13808

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 中国科学院矿产资源研究重点实验室

	Magma Replenishment as Revealed by Textural and Geochemical Features of Plagioclase Phenocrysts in Subduction-Related Lavas
	Liu Xiujin 1,2,3,4; Liu Wei 3,4; Xiao Wenjiao 5,6; Wan Bo 5
刊名	ACTA GEOLOGICA SINICA-ENGLISH EDITION
	2019-04-01
卷号	93 期号:2 页码:464-476
关键词	magma replenishment resorption REE pattern plagioclase phenocryst East Junggar
ISSN号	1000-9515
DOI	10.1111/1755-6724.13808
英文摘要	Various petrographic features and geochemical characteristics indicative of disequilibrium are preserved in plagioclase phenocrysts from basaltic to andesitic lavas in East Junggar, northwest China. These characteristics indicate that they crystallized in a magma chamber, which was replenished by less differentiated and high-temperature magmas. The petrographic and geochemical features of the plagioclase phenocrysts are interpreted to record responses to changes in temperature, composition and mechanical effect during magma replenishment. Distinct rare earth element (REE) patterns between cores and rims of the same plagioclase crystal suggest derivation from two end-member magmas. From core to rim, plagioclase phenocrysts commonly display sharp fluctuations of anorthite (An) content up to 20, which either correspond to reverse zoning associated with ovoidal cores and resorption surface (P1), or normal zoning with euhedral form and no resorption surface (P2). Plagioclase crystals with diverse textures and remarkably different An content coexist on the scale of a thin-section. Cores of these plagioclases in each sample display a bimodal distribution of An content. From core to rim in P1, concentrations of FeOT and Sr increase remarkably as An content increases. During magma replenishment, pre-existing plagioclase phenocrysts in the andesitic magma, which were immersed into hotter and less differentiated magmas, were heated and resorbed to form ovoidal cores, and then were overgrown by a thin rim with much higher contents of An, FeOT and Sr. However, pre-existing plagioclase phenocrysts in the basaltic magma were injected into cooler and more evolved magmas, and were remained as euhedral cores, which were later enclosed by oscillatory zoned rims with much lower contents of An, Sr and Ba.
资助项目	Natural Science Foundation of China[41573030] ; Natural Science Foundation of China[41503024] ; Geological Survey Program from China Geological Survey[DD20190518]
WOS关键词	DEVONIAN VOLCANIC-ROCKS ; SILICATE MELTS ; COMPOSITIONAL FEATURES ; REDOX EQUILIBRIA ; OXIDATION-STATES ; RESIDENCE TIMES ; NORTHERN MARGIN ; SOUTH MARGIN ; U-PB ; SR
WOS研究方向	Geology
语种	英语
出版者	WILEY
WOS记录号	WOS:000471333800015
资助机构	Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Geological Survey Program from China Geological Survey ; Geological Survey Program from China Geological Survey ; Geological Survey Program from China Geological Survey ; Geological Survey Program from China Geological Survey ; Geological Survey Program from China Geological Survey ; Geological Survey Program from China Geological Survey ; Geological Survey Program from China Geological Survey ; Geological Survey Program from China Geological Survey ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Geological Survey Program from China Geological Survey ; Geological Survey Program from China Geological Survey ; Geological Survey Program from China Geological Survey ; Geological Survey Program from China Geological Survey ; Geological Survey Program from China Geological Survey ; Geological Survey Program from China Geological Survey ; Geological Survey Program from China Geological Survey ; Geological Survey Program from China Geological Survey ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Geological Survey Program from China Geological Survey ; Geological Survey Program from China Geological Survey ; Geological Survey Program from China Geological Survey ; Geological Survey Program from China Geological Survey ; Geological Survey Program from China Geological Survey ; Geological Survey Program from China Geological Survey ; Geological Survey Program from China Geological Survey ; Geological Survey Program from China Geological Survey ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Geological Survey Program from China Geological Survey ; Geological Survey Program from China Geological Survey ; Geological Survey Program from China Geological Survey ; Geological Survey Program from China Geological Survey ; Geological Survey Program from China Geological Survey ; Geological Survey Program from China Geological Survey ; Geological Survey Program from China Geological Survey ; Geological Survey Program from China Geological Survey
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/92531]
专题	地质与地球物理研究所_中国科学院矿产资源研究重点实验室
通讯作者	Liu Xiujin
作者单位	1.Chinese Acad Geol Sci, Inst Geophys & Geochem Explorat, Key Lab Geochem Cycling Carbon & Mercury Earths C, Langfang 065000, Hebei, Peoples R China 2.China Geol Survey, Geochem Res Ctr Soil Qual, Langfang 065000, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China 4.Chinese Acad Sci, Inst Earth Sci, Beijing 100029, Peoples R China 5.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 6.Chinese Acad Sci, Xinjiang Inst Geog, Xinjiang Res Ctr Mineral Resources, Urumqi 830011, Xinjiang, Peoples R China
推荐引用方式 GB/T 7714	Liu Xiujin,Liu Wei,Xiao Wenjiao,et al. Magma Replenishment as Revealed by Textural and Geochemical Features of Plagioclase Phenocrysts in Subduction-Related Lavas[J]. ACTA GEOLOGICA SINICA-ENGLISH EDITION,2019,93(2):464-476.
APA	Liu Xiujin,Liu Wei,Xiao Wenjiao,&Wan Bo.(2019).Magma Replenishment as Revealed by Textural and Geochemical Features of Plagioclase Phenocrysts in Subduction-Related Lavas.ACTA GEOLOGICA SINICA-ENGLISH EDITION,93(2),464-476.
MLA	Liu Xiujin,et al."Magma Replenishment as Revealed by Textural and Geochemical Features of Plagioclase Phenocrysts in Subduction-Related Lavas".ACTA GEOLOGICA SINICA-ENGLISH EDITION 93.2(2019):464-476.