中国地质2011，Vol.38Issue(6)：1413-1420,8.
侵入梵净山群白岗岩锆石U-Pb年龄及白岗岩底砾岩对下江群沉积的制约
SHRIMP U-Pb dating of intrusive alaskite in the Fanjigshan Group and alaskite basal conglomerates: constraints on the deposition of the Xiajiang Group
摘要
Abstract
The deposition of the Xiajiang Group represents a new rift in late Neoproterozoic. The determination of the age of the Xiajiang Group is of great importance for the study of the Neoproterozoic tectonic movement. A suite of Neoproterozoic alaskite intruded into the Fanjiangshan Group and was covered by the Xiajiang Group, which developed large quantities of alaskite basal conglomerate. However, the alaskite zircon LJ-Pb age of 835+5 Ma will constrain the starting time of the deposition of the Xiajiang Group and the upper limit of the deposition of Fanjiangshan Group. Combined with the bentonite zircon U-Pb age of 814±6 Ma of the Jialu Formation in Xiajiang Group and considering the age of the Willing Movement, the authors hold that the deposition age of the Xiajiang Group is not older than the age of the alaskite basal conglomerates.关键词
Fanjingshan Group/Alaskite/Xiajiang Group/Willing Movement/SHRIMP U-PbKey words
Fanjingshan Group/Alaskite/Xiajiang Group/Willing Movement/SHRIMP U-Pb分类
天文与地球科学引用本文复制引用
高林志,戴传固,丁孝忠,王敏,刘燕学,王雪华,陈建书..侵入梵净山群白岗岩锆石U-Pb年龄及白岗岩底砾岩对下江群沉积的制约[J].中国地质,2011,38(6):1413-1420,8.基金项目
中国地质调查局地质大调查项目(121201011120131)和科技基础性工作专项(2011FY120100)资助. （121201011120131）
