• 责任者：Han Zhenzhe (State Key Laboratory of Geological Processes and Mineral Resources ; China University of Geosciences ; Beijing 100083 ; China) ; Zhao Hailing
• 刊名：Acta Petrologica et Mineralogica
• 出版年：2009
• 卷期：28(2)
• 关键词：A型花岗岩 ; A-type granite ; 正长花岗岩 ; syenogranite ; 碱长花岗岩 ; alkali feldspar granite ; 黑龙江省 ; Heilongjiang Province
• 页码：p.97-108
• 图表：4 illus., 2 tables, 35 refs.
• 分类号：0801
• issnNo：ISSN1000-6524
• isbnNo：CN11-1966/P

An analysis of petrography, major elements, trace elements and isotopic elements of Late Triassic-Early Jurassic syenogranites-alkali feldspar granites in Yichun area of Heilongjiang Province shows that most of these rocks have high temperature idiomorphic or conical quartz, accessory mineral fluorite, graphic texture and drusitic structure. Lithochemically, they are characterized by high silicon, enrichment of alkali, low calcium and magnesium and meta-aluminous to peraluminous nature. Based on an integrated analysis, the authors hold that the Late Triassic-Early Jurassic syenogranites-alkali feldspar granites in Yichun area of Heilongjiang Province should belong to aluminous A2-type granites, and the tectonic background might be continental postcollisional collapse and extensional dynamic regime after the ultimate closure of the paleo-Asian ocean.