• 责任者：Wang Duixing (State Key Laboratory of Geological Processes and Mineral Resources ; School of Earth Sciences and Mineral Resources ; China University of Geosciences ; Beijing 100083 ; China) ; Li Chunlin
• 刊名：Acta Petrologica Sinica
• 出版年：2013
• 卷期：29(11)
• 关键词：岩浆作用 ; igneous processes ; 混合作用 ; hybridization ; 铀—铅计时 ; U-Pb dating ; 浙江 ; Zhejiang Province
• 页码：p.3993-4003
• 图表：7 illus., 2 tables, 56 refs.
• 分类号：0801
• issnNo：ISSN1000-0569
• isbnNo：CN11-1922/P

     libri" size="3">The mafic enclaves have been found in the widely distributed Mesozoic intrusives in southeast coast of China, which explained to be produced by crust-mantle reaction and magma mixing. This paper present new result of zircon U-Pb dating and geochemistry on the Xiaojiang pluton in Xinchang area, eastern Zhejiang Province. The zircon U-Pb ages of host granite libri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">（libri" size="3">121.1 libri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">±libri" size="3"> 0.9Malibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">）libri" size="3"> and dioritic enclave libri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">（libri" size="3">117.6 libri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">±libri" size="3"> 1.0Malibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">）libri" size="3"> were both intruding in Early Cretaceous simultaneously. The host rocks are peraluminous cal-alkaline granite, with enriched SiO2, total alkalis, and potassium. They also exhibit significant Eu negative anomaly libri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">（libri" size="3">SEu =0. 23 -0. 30libri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">）libri" size="3">, and depletion of Sr, Ba, P, and Ti. The host granites show the feature of highly-fractionated I-type granite. The dioritic enclaves are depleted in heavy rare earth elements libri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">（libri" size="3"> REEslibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">）libri" size="3">, and forming a mixing trend with the host granites in both major and trace element compositions. The above geochemical features are agreed well with the Late Mesozoic intrusives from the coastal areas of eastern Zhejiang and Fujian provinces. The rocks possibly derived from the magma mixing between the basaltic magma libri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">（libri" size="3"> or evolved dioritic magmalibri; mso-ascii-theme-font: minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">）libri" size="3"> originally from metasomatic mantle wedge partial melting, with the felsic magma from middle-lower crustal melting. This study provides a new evidence for the crust-mantle reaction and magma mingling in the southeastern coast of China.