• 责任者：Nijiati Abuduxun (College of Geology and Exploration Engineering ; Xinjiang University ; Urumqi 830046 ; China) ; Guo Ruiqing
• 刊名：Geological Bulletin of China
• 出版年：2013
• 卷期：32(2/3)
• 关键词：花岗岩 ; granite ; 铀—铅计时 ; U-Pb dating ; 新疆 ; Xinjiang
• 页码：p.251-259
• 图表：illus., 2 tables, 40 refs.
• 分类号：0801
• issnNo：ISSN1671-2552
• isbnNo：CN11-4648/P

The South Ahongkailide Carboniferous granite is exposed in the west segment of Kuruktag block in Xinjiang. This paper has studied petrographical, geochemical and zircon U-Pb chronolgical characteristics of this granite as well as its petrogenesis and geological significance. Zircon LA-ICP-MS dating yielded the age of 340.6Ma±5.7Ma, implying that the magmatic crystallization epoch of the granite is Carboniferous. Geochemical analyses show that the granite has high SiO2, Al2O3, K2O but relatively low CaO, P2O5, TiO2 and MgO. The ratios of A/CNK vary from 1.14 to 2.31, suggesting high-K calc-alkaline peraluminous syn-collision granite. The chondrite-normalized KEE patterns show that the granite is enriched in LKEE but depleted in HKEE, with high fractionations between LKEE and HREE and moderate negative Eu anomalies （（δEu=0.52-0.62）. In addition, the granite is relatively rich in such LILEs as Rb,Ba,Th and K, but poor in such HFSEs as Nb, Ta and Ti, with relative enrichment of Ce in the primitive mande-nor- mafized trace elements patterns. The authors have come to the conclusion that the formation of the granite was closely related to crustal partial melting caused by crustal thickening and represented the magmatic activities during the collisional event between Tarim plate and Yili-Central Tianshan plate.