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A New SHRIMP Age of the Xiamaling Formation in the North China Plate and Its Geological Significance
Author(s) -
Linzhi GAO,
Chuanheng ZHANG,
Xiaoying SHI,
Hongrui ZHOU,
Ziqiang WANG,
Biao SONG
Publication year - 2007
Publication title -
acta geologica sinica ‐ english edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 61
eISSN - 1755-6724
pISSN - 1000-9515
DOI - 10.1111/j.1755-6724.2007.tb01032.x
Subject(s) - zircon , shrimp , geology , precambrian , china , geochemistry , paleontology , geography , archaeology , ecology , biology
Setting up the hypostratotype of late Precambrian is the main aim of the research on the Meso‐ and Neoproterozoic in North China. The chronostratigraphic position is the key in this study. However, many key horizons have not been calibrated with the high‐quality isotopic ages. Using the reported new U‐Pb age with the Sensitive High‐Resolution Ion Microprobe (SHRIMP II), a zircon U‐Pb age was obtained of the ash bed in the Xiamaling Formation in North China Plate, yielding a weighted mean 206 Pb/ 238 U age of 1368±12 Ma. It is the first SHRIMP U‐Pb age from the Xiamaling Formation in the North China Plate, and represents the depositing time of the middle part of the Xiamaling Formation. The zircon age plays an important role to understanding geological evolution of the North China Plate during Meso‐ and Neoproterozoic.