岩石矿物学杂志2012，Vol.31Issue(6)：771-782,12.
华北地块南缘熊耳山早中生代正长花岗岩——SHRIMP锆石U-Pb年龄、地球化学及意义
The Early Mesozoic syenogranite in Xiong' er Mountain area, southern margin of North China Craton: SHRIMP zircon U-Pb dating, geochemistry and its significance
摘要
Abstract
This paper reports a syenogranite from Zhaiwa area in Xiong'er Mountain on the southern margin of North China Craton. The syenogranite yielded a SHRIMP zircon U-Pb age of 217.7 ± 3.6 Ma and MSWD = 1.6, showing Mesozoic. The syenogranite is rich in alkaline and Al, but low in Mg and Fe. The trace elements are characterized by obvious depletion of Ba, Sr, P and Ti but relative enrichment of U, Th, Zr and Hf. The REE of Zhaiwa syenogranite has obvious tetrad effect. The geochemical features of the Zhaiwa syenogranite are different from those of the alkali-rich intrusive rocks in east Qinling and the early Mesozoic granitoids in north Qinling tectonic belt and south Qinling tectonic belt. The Zhaiwa syenogranite is a high-fractional I -type granite. The tectonic setting for the Zhaiwa syenogranite is a post-collision or post-orogenic tectonic setting.关键词
正长花岗岩/锆石U-Pb年龄/高分异Ⅰ型花岗岩/四组分效应/华北陆块南缘Key words
syenogranite/ SHRIMP zircon U-Pb dating/ high-fractional I-type granite/ REE tetrad effect/ southern margin of North China Craton分类
天文与地球科学引用本文复制引用
李厚民,王登红,王晓霞,张长青,李立兴..华北地块南缘熊耳山早中生代正长花岗岩——SHRIMP锆石U-Pb年龄、地球化学及意义[J].岩石矿物学杂志,2012,31(6):771-782,12.基金项目
国家自然科学基金资助项目(40572060) （40572060）
中国地质调查局国土资源大调查项目(1212010633903) （1212010633903）
国家科技支撑计划课题(2006BAB01A01) （2006BAB01A01）
《中国地质志》资助项目(1212010811033) （1212010811033）
