Ultrahigh-pressure metamorphic records hidden in zircons from;amphibolites in Sulu Terrane, eastern China

doi:10.1046/j.1440-1738.2003.00398.x

	Ultrahigh-pressure metamorphic records hidden in zircons from;amphibolites in Sulu Terrane, eastern China
	Liu, FL 3; Zhang, ZM ; Katayama, I ; Xu, ZQ ; Maruyama, S
刊名	ISLAND ARC
	2003
卷号	12 期号:3 页码:256-267
关键词	amphibolite cathodoluminescence image laser Raman outcrops and core samples Sulu Terrane ultrahigh-pressure mineral inclusion zircon
ISSN号	1038-4871
DOI	10.1046/j.1440-1738.2003.00398.x
英文摘要	The amphibolites occur sporadically as thin layers and blocks throughout the Sulu Terrane, eastern China. All analyzed amphibolite from outcrop and drill cores from prepilot drill hole CCSD-PP1 and CCSD-PP2, Chinese Continental Scientific Drilling Project in the Sulu Terrane, are retrograded eclogites overprinted by amphibolite-facies retrograde metamorphism, with characteristic mineral assemblages of amphibole + plagioclase + epidote +/- quartz +/- biotite +/- ilmenite +/- titanite. However, coesite and coesite-bearing ultrahigh-pressure (UHP) mineral assemblages are identified by Raman spectroscopy and electron microprobe analysis as inclusions in zircons separated from these amphibolites. In general, coesite and other UHP mineral inclusions are preserved in the cores and mantles of zircons, whereas quartz inclusions occur in the rims of the same zircons. The UHP mineral assemblages consist mainly of coesite + garnet + omphacite + rutile, coesite + garnet + omphacite, coesite + garnet + omphacite + phengite + rutile + apatite, coesite + omphacite + rutile and coesite + magnesite. Compositions of analyzed mineral inclusions are very similar to those of matrix minerals from Sulu eclogites. These UHP mineral inclusion assemblages yield temperatures of 631-780degreesC and pressures of greater than or equal to2.8 x 10(3) MPa, representing the P-T conditions of peak metamorphism of these rocks, which are consistent with those (T = 642-726degreesC; P greater than or equal to 2.8 x 10(3) MPa) deduced from adjacent eclogites. These data indicate that the amphibolites are the retrogressive products of UHP eclogites.
学科主题	变质岩岩石学
WOS关键词	DABIE MOUNTAINS ; NORTHEASTERN JIANGSU ; GARNET PERIDOTITES ; MINERAL ; INCLUSIONS ; COESITE ; ROCKS ; ECLOGITES ; GNEISS ; DRILLHOLE ; PETROLOGY
WOS研究方向	Geology
语种	英语
出版者	WILEY-BLACKWELL
WOS记录号	WOS:000185081700002
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/37579]
专题	中国地质科学院地质研究所
作者单位	1.Chinese Acad Geol Sci, Inst Geol, Beijing 100037, Peoples R China. 2.Tokyo Inst Technol, Dept Earth & Planetary Sci, Tokyo 1528551, Japan. 3.中国地质科学院地质研究所
推荐引用方式 GB/T 7714	Liu, FL,Zhang, ZM,Katayama, I,et al. Ultrahigh-pressure metamorphic records hidden in zircons from;amphibolites in Sulu Terrane, eastern China[J]. ISLAND ARC,2003,12(3):256-267.
APA	Liu, FL,Zhang, ZM,Katayama, I,Xu, ZQ,&Maruyama, S.(2003).Ultrahigh-pressure metamorphic records hidden in zircons from;amphibolites in Sulu Terrane, eastern China.ISLAND ARC,12(3),256-267.
MLA	Liu, FL,et al."Ultrahigh-pressure metamorphic records hidden in zircons from;amphibolites in Sulu Terrane, eastern China".ISLAND ARC 12.3(2003):256-267.