Helium isotope geochemistry of ultrahigh-pressure metamorphic eclogites;from the Dabie-Sulu terrane in east China

CORC > 中国地质调查局 > 中国地质调查局 > 中国地质科学院矿产资源研究所

	Helium isotope geochemistry of ultrahigh-pressure metamorphic eclogites;from the Dabie-Sulu terrane in east China
	Li, YH 3; Li, JC ; Song, HB ; Liu, XC
刊名	ACTA GEOLOGICA SINICA-ENGLISH EDITION
	2000
卷号	74 期号:1 页码:14-18
关键词	eclogites helium isotope Dabie-Sulu terrane
ISSN号	1000-9515
英文摘要	The He-3/He-4 ratios of most eclogites from the Dabie-Sulu terrane range from 0.056 to 0.67 Ra; the data points fall into the mixing part of the crust and the mantle in the He-3-He-4 diagram. The He-3/He-4 ratios of eclogites are obviously correlated with the types of their surrounding rocks. The helium isotope composition of the eclogites from the Bixiling complex possesses characters of mantle-derived rocks with the He-3/He-4 ratio being 5.6 Ra. The He-4 concentration of the eclogites exhibits visible inverse correlation with the delta(18)O value of the quartz in the eclogites from the Sulu area. The delta(18)O values of the eclogites change synchronously with those of the country rocks. Those results suggest that protoliths of the eclogites were basic-ultrabasic rock bodies or veins intruding into the continental crust in the early stage; strong exchange and hybridization between the basic-ultrabasic rocks and continental rocks and the atmospheric water during the intrusion led to abrupt increase of the He-3/He-4 ratios, delta(18)O values and epsilon(Nd)(0) values of the intrusive bodies or veins, which show characters of continental rocks. This indicates that the eclogites are autochthonous.
学科主题	变质岩岩石学
WOS关键词	MOUNTAINS ; ROCKS
WOS研究方向	Geology
语种	英语
出版者	GEOLOGICAL SOC CHINA
WOS记录号	WOS:000085807700003
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/37387]
专题	中国地质科学院矿产资源研究所
作者单位	1.Chinese Acad Geol Sci, Inst Mineral Deposits, Beijing, Peoples R China. 2.Chinese Acad Geol Sci, Inst Geomech, Beijing, Peoples R China. 3.中国地质科学院矿产资源研究所
推荐引用方式 GB/T 7714	Li, YH,Li, JC,Song, HB,et al. Helium isotope geochemistry of ultrahigh-pressure metamorphic eclogites;from the Dabie-Sulu terrane in east China[J]. ACTA GEOLOGICA SINICA-ENGLISH EDITION,2000,74(1):14-18.
APA	Li, YH,Li, JC,Song, HB,&Liu, XC.(2000).Helium isotope geochemistry of ultrahigh-pressure metamorphic eclogites;from the Dabie-Sulu terrane in east China.ACTA GEOLOGICA SINICA-ENGLISH EDITION,74(1),14-18.
MLA	Li, YH,et al."Helium isotope geochemistry of ultrahigh-pressure metamorphic eclogites;from the Dabie-Sulu terrane in east China".ACTA GEOLOGICA SINICA-ENGLISH EDITION 74.1(2000):14-18.