变质核杂岩中高Sr低Y型花岗岩的发现及其地质意义被引量：5

THE HIGH Sr,LOW Y GRANITE IN THE METAMORPHIC CORE COMPLEX AND ITS GEOLOGICAL SIGNIFICANCE

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摘要在星子变质核杂岩和武功山变质核杂岩中发现了高 Sr低 Y型花岗岩。这是变质核杂岩构造中高 Sr低 Y型花岗岩的首次报道。地球化学研究结果表明 ,它们具有与adakite相似的地球化学特征。在时空分布上 ,属于中国东部 adakite。它们是由玄武岩岩浆底侵到加厚的陆壳底部导致下地壳麻粒岩部分熔融形成的。结合花岗岩的地球化学特征及现有的资料探讨高 Sr低 The high Sr and low Y granites were found for the first time in Xingzi and Wugongshan metamorphic core complexes.Geochemical studies indicate that the geochemical characteristics of these granites are similar to those of the adakite. They belong to 'Yanshan adakites area' in east China. It is probably a product of partial melting of the lower crust granulite in the thickened crust resulted from underplating of basaltic magma. This paper presents the geochemical characteristics of these granites and discusses the genetic relationship between high Sr,low Y granite and metamorphic core complex.

作者张海祥张伯友

机构地区中国科学院广州地球化学研究所

出处《矿物岩石》 CAS CSCD 北大核心 2002年第4期16-20,共5页 Mineralogy and Petrology

基金中国科学院创新重要方向性项目 (KZCX2 -10 2 ) 国家自然科学基金 (4 9873 0 0 8)

关键词花岗岩变质核杂岩成因关系地球化学麻粒岩 high Sr low Y granite metamorphic core complex genetic relationship

分类号 P588.3 [天文地球—岩石学] P588. [天文地球—岩石学]

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1尹国胜,谢国刚.江西庐山地区伸展构造与星子变质核杂岩[J].中国区域地质,1996,15(1):17-26. 被引量：36
2舒良树,孙岩,王德滋,MFauret,JCharvet,PMonie.华南武功山中生代伸展构造[J].中国科学（D辑）,1998,28(5):431-438. 被引量：82
3Defant M J, Drummond M S. Derivation of some modern arc magmas by melting of young subducted lithosphere[J]. Nature,1990, 347(18) :662-665.
4Defant M J, Drummond M S. Mount St. Helens: Potential example of the partial melting of the subducted lithosphere in a volcanic arc[J]. Geology, 1993, 21(6):547-550.
5Atherton M P, Petford N. Generation of sodium-rich magmas from newly underplated basaltic crust[J]. Nature, 1993, 362 (11):144-146.
6Herve Martin. Adakite magmas: modern analogues of Archaean granitoids[J]. Lithos,1999,46(3):411-429.
7Drummond M S,Defant M J. A model for trondhjemite-tonalite-dacite genesis and crustal growth via slab melting: Archaean to modern comparisonslJ]. J Geophys Res, 1990,95(B13) :21 503-21 521.
8Stern C R,Kilian R. Role of the subducted slab, mantle wedge and continental crust in the generation of adakites from the Andean Austral Volcanic Zone. Contrib[J]. Mineral Petrol, 1996,123(3): 263-281.
9Petford N, Atherton M P. Na-rich partial melts from newly underplated basaltic crust:The Cordillera Blanca Batholith[J]. Peru J of Petrol,1996,37(6) :1 491-1 521.
10Rapp R P, Watson E B. Dehydration melting of metabasalt at 8-32 Kbar: Implications for continental growth and crust-mantle recycling[J]. J of Petrol, 1995,36(4) ..891-931.