Ultrahigh-pressure metamorphism in the forbidden zone: the Xugou garnet peridotite, Sulu terrane, eastern China

	Ultrahigh-pressure metamorphism in the forbidden zone: the Xugou garnet peridotite, Sulu terrane, eastern China
	Zhang, RY ; Liou, JG ; Yang, JS ; Ye, K
刊名	JOURNAL OF METAMORPHIC GEOLOGY
	2003-08-01
卷号	21 期号:6 页码:539-550
关键词	forbidden zone garnet peridotite low-temperature metasomatism Sulu terrane ultrahigh-pressure metamorphism
ISSN号	0263-4929
文献子类	Article
英文摘要	The Xugou garnet peridotite body of the southern Sulu ultrahigh-pressure (UHP) terrane is enclosed in felsic gneiss, bounded by faults, and consists of harzburgite and lenses of garnet clinopyroxenite and eclogite. The peridotite is composed of variable amounts of olivine (Fo(91)), enstatite (En(92-93)), garnet (Alm(20-23)Prp(53-58)Knr(6-9)Grs(12-18)), diopside and rare chromite. The ultramafic protolith has a depleted residual mantle composition, indicated by a high-Mg number, very low CaO, Al2O3 and total REE contents compared to primary mantle and other Sulu peridotites. Most garnet (Prp(44-58)) clinopyroxenites are foliated. Except for rare kyanite-bearing eclogitic bands, most eclogites contain a simple assemblage of garnet (Alm(29-34)Prp(32-50)Grs(15-39)) + omphacite (Jd(24-36)) + minor rutile. Clinopyroxenite and eclogite exhibit LREE-depleted and LREE-enriched patterns, respectively, but both have flat HREE patterns. Normalized La, Sm and Yb contents indicate that both eclogite and garnet clinopyroxenite formed by high-pressure crystal accumulation (+ variable trapped melt) from melts resulting from two-stage partial melting of a mantle source.
WOS关键词	DABIE MOUNTAINS ; MINERAL INCLUSIONS ; MAGNESITE-BEARING ; ULTRAMAFIC ROCKS ; MANTLE ; ECLOGITES ; EVOLUTION ; GEOTHERMOMETER ; PETROGENESIS ; CALIBRATION
WOS研究方向	Geology
语种	英语
出版者	BLACKWELL PUBLISHING LTD
WOS记录号	WOS:000184467500005
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/78369]
专题	中国科学院地质与地球物理研究所
通讯作者	Zhang, RY
作者单位	1.Stanford Univ, Dept Geol & Environm Sci, Stanford, CA 94305 USA 2.Chinese Acad Geol Sci, Inst Geol, Beijing 100037, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Zhang, RY,Liou, JG,Yang, JS,et al. Ultrahigh-pressure metamorphism in the forbidden zone: the Xugou garnet peridotite, Sulu terrane, eastern China[J]. JOURNAL OF METAMORPHIC GEOLOGY,2003,21(6):539-550.
APA	Zhang, RY,Liou, JG,Yang, JS,&Ye, K.(2003).Ultrahigh-pressure metamorphism in the forbidden zone: the Xugou garnet peridotite, Sulu terrane, eastern China.JOURNAL OF METAMORPHIC GEOLOGY,21(6),539-550.
MLA	Zhang, RY,et al."Ultrahigh-pressure metamorphism in the forbidden zone: the Xugou garnet peridotite, Sulu terrane, eastern China".JOURNAL OF METAMORPHIC GEOLOGY 21.6(2003):539-550.