• 责任者：Xu Lifeng (CAS Key Laboratory of Marginal Sea Geology ; Guangzhou Institute of Geochemistry ; CAS ; Guangzhou 510640 ; China) ; Xia Bin
• 刊名：Geotectonica et Metallogenia
• 出版年：2010
• 卷期：34（1）
• 关键词：玄武岩 ; basalts ; 蛇绿岩 ; ophiolite ; 岩石地球化学 ; lithogeochemistry ; 西藏 ; Tibet
• 页码：p.105-113
• 图表：6 illus., 1 table, 28 refs.
• 分类号：0801
• issnNo：ISSN1001-1552
• isbnNo：CN44-1595/P

ARGIN: 0cm 0cm 0pt" class=MsoNormal>an’; FONT-SIZE: 14pt; mso-font-kerning: 1.0pt; mso-fareast-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA" lang=EN-US>The Lanong ophiolite, located in Jiangcuo, amespace prefix = st1 ns = "urn:schemas-microsoft-com:office:smarttags" />ace w:st="on">Bange, Tibetace>, is a key element within the Baila-Lanong ophiolite belt. Trace elements analysis indicates that the pillow lavas are enriched in Sr, Ba and Th, delpleted in Nb, Ta and Ti, clearly displaying compositional characteristics of the island-arc volcanic rocks. On the Chondrite-normalized trace element diagram, all lava samples show flat patterns, with (La/Yb)N and (Ce/Yb) N ratios similar to those of N-MORB. Combining the terranes’ distribution with the discrimination results of geochemical diagrams, a simple tectonic evolution model is suggested.