Genetic relationship between deformation and low-Ca content in olivine from magmatic systems: evidence from the Poyi ultramafic intrusion, NW China

doi:10.1007/s00710-017-0504-4

	Genetic relationship between deformation and low-Ca content in olivine from magmatic systems: evidence from the Poyi ultramafic intrusion, NW China
	Yao, Zhuo-sen 1,2; Qin, Ke-zhang 1,2; Xue, Sheng-chao 1,2
刊名	MINERALOGY AND PETROLOGY
	2017-12-01
卷号	111 期号:6 页码:909-919
关键词	Poyi Ultramafic Intrusion Ca-depleted Olivine Solute Drag Effect Magmatic Origin Mineral Deformation
ISSN号	0930-0708
DOI	10.1007/s00710-017-0504-4
文献子类	Article
英文摘要	The deformation features (e.g., undulose extinction and subgrain boundaries) and low Ca content (< 1000 ppm) of high-Fo olivine have been widely used as indictors for the mantle origin of olivine in the past. However, grains with these characteristics are also found in some crustal intrusions, e.g., Duke Island and Bushveld complexes. Here, we study this type of olivine in the Poyi ultramafic intrusion, NW China, to trace the formation of these unusual features in magmatic systems. As a result of the possible Ca-depleted parental melt and low Ca olivine/melt partition coefficient, olivine from the Poyi intrusion is extremely depleted in Ca. On the other hand, it has been confirmed that trace elements with large ionic radii (e.g., Ca2+ and Al3+) are chemically segregated at the grain boundary of olivine, exerting a dragging influence on grain boundary processes (named as solute drag effect). In this regard, the low Ca content in olivine weakens the solute drag effect, and in doing so it enhances the rate and strength of grain deformation, which occurs to accommodate the stress derived by fast compaction of the crystal mush in Poyi intrusion. Therefore, there is a genetic relationship between the plastic deformation and low Ca content in olivines from magmatic cumulates, and this link is one of the reasons causing the widespread deformation observed in Ca-depleted olivine from Poyi and other intrusions. What is more important, this work fills the gaps in the interpretation of this type of olivine in volcanic rocks.
WOS关键词	ASIAN OROGENIC BELT ; CU SULFIDE MINERALIZATION ; LARGE IGNEOUS PROVINCE ; MOLTEN UPPER-MANTLE ; EXPERIMENTAL CONSTRAINTS ; SILICATE MELT ; BASALTIC MAGMATISM ; LAYERED INTRUSION ; GRAIN-BOUNDARIES ; EASTERN TIANSHAN
WOS研究方向	Geochemistry & Geophysics ; Mineralogy
语种	英语
出版者	SPRINGER WIEN
WOS记录号	WOS:000416061000009
资助机构	National Natural Science Foundation of China(41030424) ; National Natural Science Foundation of China(41030424) ; National Natural Science Foundation of China(41030424) ; National Natural Science Foundation of China(41030424) ; National Natural Science Foundation of China(41030424) ; National Natural Science Foundation of China(41030424) ; National Natural Science Foundation of China(41030424) ; National Natural Science Foundation of China(41030424)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/82034]
专题	中国科学院地质与地球物理研究所
通讯作者	Qin, Ke-zhang
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Yao, Zhuo-sen,Qin, Ke-zhang,Xue, Sheng-chao. Genetic relationship between deformation and low-Ca content in olivine from magmatic systems: evidence from the Poyi ultramafic intrusion, NW China[J]. MINERALOGY AND PETROLOGY,2017,111(6):909-919.
APA	Yao, Zhuo-sen,Qin, Ke-zhang,&Xue, Sheng-chao.(2017).Genetic relationship between deformation and low-Ca content in olivine from magmatic systems: evidence from the Poyi ultramafic intrusion, NW China.MINERALOGY AND PETROLOGY,111(6),909-919.
MLA	Yao, Zhuo-sen,et al."Genetic relationship between deformation and low-Ca content in olivine from magmatic systems: evidence from the Poyi ultramafic intrusion, NW China".MINERALOGY AND PETROLOGY 111.6(2017):909-919.