U-Pb Age of Zircon from the Syenogranite in Adelagawula, Inner Mongolia
详细信息
- 责任者：Zhang Yuqing (Inner Mongolia Institute of Geological Survey ; Hohhot 010020 ; China) ; Zhang Jian
- 刊名：Geology and Resources
- 出版年：2013
- 卷期：22(4)
- 关键词：正长花岗岩 ; syenogranite ; 内蒙古 ; Inner Mongolia
- 页码：p.308-312
- 图表：illus., 3 tables, 19 refs.
- 分类号：0801
- issnNo：ISSN1671-1947
- isbnNo：CN21-1458/P
摘要
The Adelagawula syenogranite occurs in Abaga Qi,Inner Mongolia,near the Sino-Mongolian border.The intrusive rock was assigned to Early-Yanshanian(Kγ 5 2)by 1:200 000 regional geological surveyor or Lower Permian as alkali feldspar granite(P 1 χγ)in 1:250 000 regional geological survey.The U-Pb isotopic dating of the syenogranite shows the age of 273.1±0.4 Ma.Combined with regional geological data and previous research,it is possibly a product of Early Permian magmatism.The syenogranite,with high silica,high potassium,per-aluminum and poor calcium-magnesium-iron,belongs to post-orogenic I-type granite.The REE distribution is in V-shaped pattern,with low total rare earth content,unobvious fractionation of LREE and HREE,δEu values ranging from 0.07 to 0.60 and strongly depleted Eu.