华南地质2024，Vol.40Issue(2)：307-322,16.DOI:10.3969/j.issn.2097-0013.2024.02.008
粤北地区"南华系"沉积时代的重新厘定:来自碎屑锆石年代学的证据
Recalibrating the "Nanhuan" in North-ern Guangdong Province:Evidence from Detrital Zircon U-Pb Dating
摘要
Abstract
Northern Guangdong was located in West Cathaysia,between Wuyi and Yunkai areas,and it stretched across two stratigraphic subdivision of Xiang(Hunan)-Gui(Guangxi)-Gan(Jiangxi)and Wuyi.Its tec-tonic and stratigraphic location makes it essential to research the"Nanhuan"in the area when exploring the issue of tectonic evolution of the Cathaysia during late Neoproterozoic.However,the calibration of the"Nan-huan"in Northern Guangdong has been uncredible because of lacking evidence except lithological and se-quence correlation with adjacent provinces and areas.In addition,recent research makes the correlation not robust.This paper focuses on the"Nanhuan"in Northern Guangdong to achieve U-Pb dating of detrital zir-cons.The youngest zircon weighted ages data in this research(422±4 Ma and 430±4 Ma)with the data from geological survey and previous researching documents in the same area proves that the initial defined"Nan-huan"in Northern Guangdong should be Lower Devonian and its provenance has been similar to the Devoni-an sedimentation of adjacent areas with peaks of 450～420 Ma,1000～900 Ma and～2450 Ma as well as com-plex secondary peak of 800～550 Ma.In further tectonic evolution research of southern Cathaysia to Yunkai areas during late Neoproterozoic,the"Nanhuan"in this area should be reconsidered.关键词
华夏地块/粤北/大绀山组/活道组/锆石U-Pb定年/南华系/下泥盆统Key words
Cathaysia/Northern Guangdong/the Daganshan Formation/the Huodao Formation/detrital zir-con U-Pb dating/the Nanhua system/Lower Devonian分类
天文与地球科学引用本文复制引用
何垚砚,杨文强,林小明,廖小华,宋芳..粤北地区"南华系"沉积时代的重新厘定:来自碎屑锆石年代学的证据[J].华南地质,2024,40(2):307-322,16.基金项目
古生物与地质环境演化湖北省重点实验室开放基金课题(PEL-202106)、中国地质调查局地质调查项目(DD20243455、DD20240038、DD20230226)、国家自然科学基金项目(U2244212、41772019) （PEL-202106）
