Middle Paleoproterozoic crustal extensional regime in the North China;Craton: New evidence from SHRIMP zircon U-Pb dating and whole-rock;geochemistry of meta-gabbro in the Anshan-Gongchangling area

	Middle Paleoproterozoic crustal extensional regime in the North China;Craton: New evidence from SHRIMP zircon U-Pb dating and whole-rock;geochemistry of meta-gabbro in the Anshan-Gongchangling area
	Dong ChunYan 3; Ma MingZhu ; Liu ShouJie ; Xie HangQiang ; Liu DunYi ; Li XueMei ; Wan YuSheng
刊名	ACTA PETROLOGICA SINICA
	2012
卷号	28 期号:9 页码:2785-2792
关键词	Gabbro Paleoproterozoic Extensional regime SHRIMP dating Anshan North China Craton
ISSN号	022HC
英文摘要	This paper reports whole-rock geochemistry and zircon geochronology of Middle Paleoproterozoic meta-gabbro from the Anshan-Gongchangling area, eastern North China Craton. Based on geoehemical compositions, the meta-gabbro can be divided into two types. Type 1 is high in FeOT and low in MgO, with TREE contents and (La/Yb)(N) values of 107.5 x 10(-6) similar to 114.0 x 10(-6) and 2.6 similar to 2.7. They are not obviously depleted in Nb, P and Ti, and show strong depletion in Cr. Type 2 meta-gabbro is high in SiO2 and low in FeOT, showing a higher (La/Yb)(N) ratio (6.8) and stronger depletion of Nb compared with type 1 meta-gabbro. SHRIMP dating of type 1 meta-gabbro yielded a weighted mean Pb-207/Pb-206 age of 2110 +/- 30Ma for baddeleyite and magmatic zircon and an upper intercept age of similar to 2.95Ga for trapped zircon. Type 1 meta-gabbro is formed by strong recrystallization-differentiation of mafic magma staying a long period at a deep magmatic chamber, supporting a conclusion that the North China Craton was in an extensional regime during the Middle Paleoproterozoic period.
学科主题	构造地质学
WOS关键词	EASTERN BLOCK ; GEOCHRONOLOGICAL CONSTRAINTS ; KHONDALITE BELT ; FUPING ; COMPLEX ; MOUNTAINS AREA ; HUTUO-GROUP ; EVOLUTION ; AGES ; ACCRETION ; OROGEN
WOS研究方向	Geology
语种	中文
WOS记录号	WOS:000309947500009
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/39762]
专题	中国地质科学院地质研究所
作者单位	1.Chinese Acad Geol Sci, Beijing SHRIMP Ctr, Inst Geol, Beijing 100037, Peoples R China. 2.Jilin Univ, Coll Appl Tech, Changchun 130022, Peoples R China. 3.中国地质科学院地质研究所
推荐引用方式 GB/T 7714	Dong ChunYan,Ma MingZhu,Liu ShouJie,et al. Middle Paleoproterozoic crustal extensional regime in the North China;Craton: New evidence from SHRIMP zircon U-Pb dating and whole-rock;geochemistry of meta-gabbro in the Anshan-Gongchangling area[J]. ACTA PETROLOGICA SINICA,2012,28(9):2785-2792.
APA	Dong ChunYan.,Ma MingZhu.,Liu ShouJie.,Xie HangQiang.,Liu DunYi.,...&Wan YuSheng.(2012).Middle Paleoproterozoic crustal extensional regime in the North China;Craton: New evidence from SHRIMP zircon U-Pb dating and whole-rock;geochemistry of meta-gabbro in the Anshan-Gongchangling area.ACTA PETROLOGICA SINICA,28(9),2785-2792.
MLA	Dong ChunYan,et al."Middle Paleoproterozoic crustal extensional regime in the North China;Craton: New evidence from SHRIMP zircon U-Pb dating and whole-rock;geochemistry of meta-gabbro in the Anshan-Gongchangling area".ACTA PETROLOGICA SINICA 28.9(2012):2785-2792.