Emplacement Age of the Gabbro-Diabase Dike in the Hongmen Scenic Region of Mount Tai, Shandong Province, North China: Baddeleyite U-Pb Precise Dating
详细信息
- 责任者：Xiang Zhenqun (China University of Geosciences ; Beijing 100083 ; China) ; Li Huaikun
- 刊名：Acta Petrologica Sinica
- 出版年：2012
- 卷期：28(9)
- 关键词：辉长岩 ; gabbros ; 辉绿岩 ; diabase ; 铀—铅计时 ; U-Pb dating ; 泰山 ; Taishan Mountains
- 页码：p.2831-2842
- 图表：6 illus., 4 tables, 62 refs.
- 分类号：0801
- issnNo：ISSN1000-0569
- isbnNo：CN11-1922/P
摘要
The gabbro-diabase dike occurred in the Hongmen Scenic Region of Mount Tai, western Shandong Province, was probably formed during the initial rifting period of Columbia, but with very poor age constraints. By means of two modern dating methods of ID-TIMS and SIMS, the authors of this paper analyzed baddeleyite U-Pb isotopic ages of the gabbro-diabase dike; two consistent ages with error were obtained, (1 621.1±8.8） Ma (ID-TIMS) and (1 632.4±4.2) Ma (SIMS). This achievement leads to amendment of the previous imprecise emplacement timing of the Hongmen gabbro-diabase dike. It is demonstrated that the Hongmen gabbro-diabase dike is coeval with the Longwangzhuang alkaline granite in the southern margin of the North China Craton and the Dahongyu Stage alkaline volcanics and sill in the northern margin of the North China Craton confirmed to be the product during the initial rifting period of the Columbia Supercontinent.