Chrome-rich clinopyroxene in orthopyroxenite from Maowu, Dabie;mountains, central China: A second record and its implications for;petrogenesis

doi:10.1046/j.1440-1738.1998.00187.x

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	Chrome-rich clinopyroxene in orthopyroxenite from Maowu, Dabie;mountains, central China: A second record and its implications for;petrogenesis
	Liu, XC 4; Zhou, HY ; Ma, ZS ; Chang, LH
刊名	ISLAND ARC
	1998
卷号	7 期号:1-2 页码:135-141
关键词	chrome-rich clinopyroxene chromian inclusion minerals eclogite-ultramafic complex petrogenesis Maowu
ISSN号	1038-4871
DOI	10.1046/j.1440-1738.1998.00187.x
英文摘要	A second occurrence of chrome-rich clinopyroxene has been discovered as inclusions in orthopyroxene in orthopyroxenite from Maowu, the Dabie Mountains, Central China. The average formula for chrome-rich clinopyroxene can be expressed as (Na(0.3)9Ca(0.54))(0.93)(Mg(0.57)Fe(2+)0.06Fe(0.01)(3+) Cr0.24Al0.15)(1.03)Si2.02O6, with a maximum amount of kosmochlor component of 28.52 mol%. The unit cell parameters obtained fi om a single-crystal are a = 9.614 Angstrom b = 8.800 Angstrom c = 5.240 Angstrom, beta = 106.59 degrees, space group C2/c. The indices of refraction are alpha = 1.697, beta = 1.704, gamma = 1.726. Chrome-rich clinopyroxene, which coexists with chromite, chromian rutile and chromian pyrope, crystallized at a temperature of 1025 degrees C and very high pressure, and therefore represents a mantle relic. Together with the appearance of low-pressure inclusion mineral assemblage and the estimation of physical-chemical conditions for matrix minerals, the Maowu eclogite-ultramafic complex is considered to be formed during ultrahigh-pressure metamorphism from the mantle-derived protolith.
学科主题	结晶学与矿物学
WOS关键词	GARNET ; FE ; MG
WOS研究方向	Geology
语种	英语
出版者	BLACKWELL SCIENCE
WOS记录号	WOS:000074434600009
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/37310]
专题	中国地质调查局天津地质调查中心
作者单位	1.Chinese Acad Geol Sci, Inst Geomech, Beijing 100081, Peoples R China. 2.China Univ Geosci, Dept Geol, Wuhan 430074, Peoples R China. 3.Changchun Univ Earth Sci, Dept Geol, Changchun 130026, Peoples R China. 4.中国地质科学院地质力学研究所
推荐引用方式 GB/T 7714	Liu, XC,Zhou, HY,Ma, ZS,et al. Chrome-rich clinopyroxene in orthopyroxenite from Maowu, Dabie;mountains, central China: A second record and its implications for;petrogenesis[J]. ISLAND ARC,1998,7(1-2):135-141.
APA	Liu, XC,Zhou, HY,Ma, ZS,&Chang, LH.(1998).Chrome-rich clinopyroxene in orthopyroxenite from Maowu, Dabie;mountains, central China: A second record and its implications for;petrogenesis.ISLAND ARC,7(1-2),135-141.
MLA	Liu, XC,et al."Chrome-rich clinopyroxene in orthopyroxenite from Maowu, Dabie;mountains, central China: A second record and its implications for;petrogenesis".ISLAND ARC 7.1-2(1998):135-141.