Geochemical Features of the Cenozoic Alkaline Ultramafic Volcanic Rock in Fujian and Their Tectonic Significance

• 责任者：Zhang Guishan (College of Earth Science and Land Recourses ; Chang’an University ; Xi’an 710054 ; China) ; Wen Hanjie
• 刊名：Acta Geologica Sinica
• 出版年：2009
• 卷期：83(2)
• 关键词：火山岩 ; volcanic rocks ; 福建 ; Fujian Province
• 页码：p.284-294
• 图表：10 illus., 4 tables, 48 refs.
• 分类号：0801
• issnNo：ISSN0001-5717
• isbnNo：CN11-1951/P

The paper studies the chronology and geochemistry of limburgite at Liucheng, Fujian Province, in order to better understand the Cenozoic mantle nature and the geotectonic setting of Fujian. Limburgite is a kind of alkaline ultramafic rock, and formed at 12.6 Ma. It is enriched in Mg and Fe, especially LILE and HFSE, and depleted in alkali elements. Nb and Ta show positive anomalies. The rock is also strong enrichment in LREE and relatively depletion in HREE. The all above-mentioned features of trace elements are similar to those of the ocean island basalt (OIB).