岩石矿物学杂志2009，Vol.28Issue(5)：433-449,17.
黑龙江宝山一带海西晚期强过铝花岗岩地质地球化学及岩石成因
Geology-geochemistry and petrogenesis of Late Hercynian granites in Baoshan area, Heilongjiang Province
摘要
Abstract
The Baoshan area in Heilongjiang Province is tectonically located in the north of the Yichun-Yanshou fold belt lying between the Songliao Block and the Jiamusi Block in the east of the Xingmeng oregenic belt. Large volumes of Paleozoic-Mesozoic granitic rocks are distributed in this area. This paper deals emphatically on the Late Hercynian granitoids composed of alkali-feldspar granite, monzogranite and granodiorite. LA-ICP MS (laser inductively coupled plasma mass spectrometry) zircon U-Pb dating yielded an age of 252.6± 3 Ma. Major element analyses show high SiO_2 and alkali content, slightly high Al_2O_3 content and low MgO and CaO content. Trace element studies demonstrate the enrichment of Rb, Nd, K, Pb, U and depletion of HFSE (high field strength elements) such as Nb, Ta, P, Ti. The samples are enriched in LREE (light rare earth elements) and depleted in HREE (heavy rare earth elements), suggesting a high degree of fractionation. The granites generally belong to the high-K calc-alkaline series and might be produced by the magma that experienced a high degree of crystallization differentiation. Mineral chemistry and petrological geochemistry show that the granites are quite similar to S-type granite, with the material source derived from the crust.关键词
花岗岩/岩石成因/海西晚期/黑龙江Key words
granite/ petrogenesis/ Late Hercynian/ Heilongjiang分类
天文与地球科学引用本文复制引用
高阳,张招崇,杨铁铮..黑龙江宝山一带海西晚期强过铝花岗岩地质地球化学及岩石成因[J].岩石矿物学杂志,2009,28(5):433-449,17.基金项目
111 Project 资助项目(B07011) （B07011）
教育部创新团队计划资助项目 （）
