山西恒山巨晶状直闪石岩的成因_来自地球化学和Sm_Nd同位素的证据.pdfVIP

1000-0569 / 2012 /028 (09)-2819-30 Acta Petrologica Sinica 岩石学报 : 山西恒山巨晶状直闪石岩的成因 来自地球化学和 * Sm － Nd 同位素的证据 1 1 2 3 钱加慧 魏春景 周喜文 初航 QIAN JiaHui1 ，WEI ChunJing1 ，ZHOU XiWen2 and CH U Hang3 1． ， ， 10087 1 北京大学地球与空间科学学院 造山带与地壳演化教育部重点实验室 北京 2． ， 100037 中国地质科学院地质研究所 北京 3． ， 300 170 天津地质矿产研究所 天津 1． Key Laboratory of Orogenic Belts and Crustal Evolution ，Ministry of Education ，School of Earth and Sp ace Sciences ，Peking University ， Beij ing 10087 1，China 2． Institute of Geology ，Chinese Academy of Geological Sciences ，Beij ing 100037 ，China 3． Tianj in Institute of Geology and Mineral Resources ，Tianj in 300 170 ，China 20 11-12-10 收稿，20 12-04 -22 改回. Qian JH ，Wei CJ ，Zhou XW and Chu H． 2012． Genesis of the megacryst orthoamphibole rock from Hengshan Mts ，Shanxi Province :Evidence from geochemistry and Sm-Nd isotopic data． Acta Petrologica Sinica ，28 (9):2819 － 2830 Abstract The megacryst orthoamphibole rocks from Hengshan Mts ，Shanxi Province are comprised of orthoamphibole ，kyanite ， staurolite ，cordierite ，quartz ，rutile ，ilmenite and a small amount of plagioclase and calcic amphibole． They have the similar SiO2 contents to intermediate-basic rocks ，but much higher MgO ，total Fe O and lower CaO ，Na O and K O contents than the latter． The 2 3 2 2 rocks can be grouped into two types． Type I orthoamphibole rocks contain mega-grained garnet porphyroblasts ，and relatively lower MgO ，TiO ，Na O and K O but higher Al O and total Fe O contents． This type are similar to IAB in HFSE and REE