干旱区生态环境知识资源中心(Arid): Geochemistry and Petrogenesis of Adakitic Granitoids from Bognae Area in the Southwestern Part of the Yeongnam Massif, Korea

Arid

	Geochemistry and Petrogenesis of Adakitic Granitoids from Bognae Area in the Southwestern Part of the Yeongnam Massif, Korea
	Wee, SooMeen; Park, Jae-Yong
通讯作者	Wee, S
来源期刊	JOURNAL OF THE KOREAN EARTH SCIENCE SOCIETY
ISSN	1225-6692
EISSN	2287-4518
出版年	2009
卷号	30 期号:4 页码:427-443
英文摘要	Cretaceous intrusive and extrusive rocks in the southwestern part of the Yeongnam Massif are possibly the result of intensive magmatism which occurred in response to subduction of the Pacific plate beneath the northeast portion of the Eurasian plate. Geochemical and petrological study on the granitic rocks were carried out in order to constrain the petrogenesis of the granitic magma and to establish the paleotectonic environment of the area. Whole rock chemical data of the granitic rocks from the study area indicate that all the rocks have characteristics of talc-alkaline series in the subalkaline field. The overall geochemical features show systematic variations in each granitic body, but the source materials of each granitic body are thought to have been different in their chemical composition. The granodiorites distributed around Donggyori in the Bognae area (DGd) are different from other granitic rocks within the study area in the contents and differentiation trends of Al2O3 and MgO as well as in the contents of the trace elements such as Ra., Sr, Pb, Ni, Cr and Y. DGd have geochemical features similar to slab-derived adakites such as high Al2O3, Sr contents and high Sr/Y, La/Yb ratios, but low Y and Yb contents. The major and trace element contents of the DGd fall well within the adakitic field, whereas other Cretaceous granites in the study area are plotted in the island arc ADR area in Sr/Y vs. Y diagram. On the ANK vs. A/CNK arid tectonic discrimination diagrams, parental magma type of the granites corresponds to I-type and volcanic arc granite (VAG). Interpretations of the chemical characteristics of the granitic rocks favor their emplacement in a compressional tectonic regime at continental margin during the subduction of Pacific plate. The geochemical and tectonic features reveal that adakite-like signatures of the DGd were generated by the interaction of mantle peridotite arid subducted slab-derived adakitic melts (caused by the thermal effect of ridge subduction), and which slightly modified by crustal contamination during emplacement.
英文关键词	Adakite Cretaceous granite slab-derived melt ridge subduction
类型	Article
语种	其他
收录类别	ESCI
WOS记录号	WOS:000437595400003
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/329349
作者单位	[Wee, SooMeen] Korea Natl Univ Educ, Dept Earth Sci, Chungbuk 636791, South Korea; [Park, Jae-Yong] Pyeung Chang Middle Sch, Gangwon 232808, South Korea
推荐引用方式 GB/T 7714	Wee, SooMeen,Park, Jae-Yong. Geochemistry and Petrogenesis of Adakitic Granitoids from Bognae Area in the Southwestern Part of the Yeongnam Massif, Korea[J],2009,30(4):427-443.
APA	Wee, SooMeen,&Park, Jae-Yong.(2009).Geochemistry and Petrogenesis of Adakitic Granitoids from Bognae Area in the Southwestern Part of the Yeongnam Massif, Korea.JOURNAL OF THE KOREAN EARTH SCIENCE SOCIETY,30(4),427-443.
MLA	Wee, SooMeen,et al."Geochemistry and Petrogenesis of Adakitic Granitoids from Bognae Area in the Southwestern Part of the Yeongnam Massif, Korea".JOURNAL OF THE KOREAN EARTH SCIENCE SOCIETY 30.4(2009):427-443.