地质调查与研究2012，Vol.35Issue(2)：128-135,8.
内蒙古宾巴勒查干粗中粒正长花岗岩年代学及岩石地球化学
Geochronology and Geochemistry of the Coarse-medium Grained Syenogranites in the Binbalechagan Area, Inner Mongolia
摘要
Abstract
Intrusive rocks are widespread in the Binbalechagan, Dongwuqi, Inner Mongolia Autonomous Region. This paper selectes coarse-medium grained syenogranites (CMGS) in the region for isotope chronological and geochemical studies. By zircon SHRIMP U-Pb dating, weighted mean age of 220.4 ± 2.5 Ma(MSWD = 0.83) is obtained. The zircon oscillatory rings are well developed with typical pattern of magmatic zircon, so the result may represent the diagenetic age of the granite. CMGS is characterized by K enrichment, peraluminous, LREE relatively enriched, substantial negative Eu anomalies, HREE with weak negative gradient, Ba with obvious nega- tive anomalies, Rb and Th relatively enriched, other incompatible elements relatively depleted, both Y and Yb lower than the normalized values of ocean ridge granite. CMGS probably formed under post-orogenic extension setting after the convergence between the Siberian plate and Sino-Korean plaeo-plate.关键词
SHRIMP锆石U—Db年龄/印支期/后造山花岗岩/地球化学特征/东乌旗/宾巴勒查干Key words
SHRIMP U-Pb dating/Indo-china/post-orogenic granite/geochemical characteristic/Dongwuqi/Bin-balechagan分类
天文与地球科学引用本文复制引用
杨俊泉,刘永顺,滕学建,程银行,赵显宗,耿建珍,张永..内蒙古宾巴勒查干粗中粒正长花岗岩年代学及岩石地球化学[J].地质调查与研究,2012,35(2):128-135,8.基金项目
国家地质调查项目：内蒙古1/5万敖包查千幅、多钦乌拉幅、宾巴勒查干幅、满都胡宝力格幅 （）
