• 责任者：Wei Fanghui (School of Earth Science and Resources ; Chang’an University ; Xi’an 710054 ; China) ; Pei Xianzhi
• 刊名：Geological Bulletin of China
• 出版年：2012
• 卷期：31(9)
• 关键词：花岗闪长岩 ; granodiorites ; 铀—铅计时 ; U-Pb dating ; 甘肃 ; Gansu Province
• 页码：p.1496-1509
• 图表：6 illus., 2 tables, 1 plate, 58 refs.
• 分类号：0801
• issnNo：ISSN1671-2552
• isbnNo：CN11-4648/P

Located in the northern Qilian orogenic belt of Tianshui region within Gansu Province, the Huangmenchuan granodiorite intruded into basic volcanic rocks of the Upper Ordovician Chenjiahe Group.The petrologic and geochemical characteristics show that this granodiorite was formed by emplacement of crust-mantle mixed type of magma. The results of LA-ICP-MS zircon U-Pb data of the granodiorite from Huangmenchuan show that the Huangmenchuan granodiorite was emplaced at (440.5±4.4) Ma, belonging to Lower Silurian. The element geochemical characteristics indicate that Huangmenchuan granodiorite belongs to middle-K cal-alkaline series with features of I-type granite.