Crustal reworking in the North China Craton at ~2.5 Ga: evidence from zircon U-Pb age, Hf isotope and whole rock geochemistry of the felsic volcano-sedimentary rocks from the western Shandong Province

2013 ◽  
Vol 48 (5) ◽  
pp. 406-428 ◽  
Author(s):  
Wei Wang ◽  
Mingguo Zhai ◽  
Shijin Wang ◽  
M. Santosh ◽  
Lilin Du ◽  
...  
Keyword(s):  
North China Craton ◽  
North China ◽  
Sedimentary Rocks ◽  
Shandong Province ◽  
Hf Isotope ◽  
The North ◽  
Crustal Reworking ◽  
Western Shandong

A Palaeoproterozoic basement beneath the Rangnim Massif revealed by the in situ U–Pb ages and Hf isotopes of xenocrystic zircons from Triassic kimberlites of North Korea

2019 ◽  
Vol 156 (10) ◽  
pp. 1657-1667 ◽  
Author(s):  
Yu-Sheng Zhu ◽  
Jin-Hui Yang ◽  
Hao Wang ◽  
Fu-Yuan Wu
Keyword(s):  
North China Craton ◽  
North Korea ◽  
North China ◽  
Hf Isotope ◽  
Granitic Rocks ◽  
Crustal Evolution ◽  
The North ◽  
Deep Crust ◽  
Crustal Reworking

AbstractIn situ U–Pb and Hf analyses were used for crustal zircon xenocrysts from Triassic kimberlites exposed in the Rangnim Massif of North Korea to identify components of the basement hidden in the deep crust of the Rangnim Massif and to clarify the crustal evolution of the massif. The U–Pb age spectrum of the zircons has a prominent population at 1.9–1.8 Ga and a lack of Archaean ages. The data indicate that the deep crust and basement beneath the Rangnim Massif are predominantly of Palaeoproterozoic age, consistent with the ages of widely exposed Palaeoproterozoic granitic rocks. In situ zircon Hf isotope data show that most of the Palaeoproterozoic zircon xenocrysts have negative ϵHf(t) values (−9.7 to +0.7) with an average Hf model age of 2.86 ± 0.02 Ga (2σ), which suggests that the Palaeoproterozoic basement was not juvenile but derived from the reworking of Archaean rocks. Considering the existence of Archaean remanent material in the Rangnim Massif and their juvenile features, a strong crustal reworking event is indicated at 1.9–1.8 Ga, during which time the pre-existing Archaean basement was exhausted and replaced by a newly formed Palaeoproterozoic basement. These features suggest that the Rangnim Massif constitutes the eastern extension of the Palaeoproterozoic Liao–Ji Belt of the North China Craton instead of the Archaean Liaonan Block as previously thought. A huge Palaeoproterozoic orogen may exist in the eastern margin of the Sino-Korean Craton.

U–Pb and Hf-isotope analysis of zircons in mafic xenoliths from Fuxian kimberlites: evolution of the lower crust beneath the North China craton

2004 ◽  
Vol 148 (1) ◽  
pp. 79-103 ◽  
Author(s):  
Jianping Zheng ◽  
W. L. Griffin ◽  
Suzanne Y. O’Reilly ◽  
Fengxiang Lu ◽  
Chunmei Yu ◽  
...  
Keyword(s):  
North China Craton ◽  
Lower Crust ◽  
North China ◽  
Isotope Analysis ◽  
Hf Isotope ◽  
The North

Early Neoarchean oceanic crust in the North China Craton: Evidence from geology, geochemistry and geochronology of greenstone belts in western Shandong

Lithos ◽  
2020 ◽  
pp. 105888
Author(s):  
Chunyan Dong ◽  
Wenqian Bai ◽  
Hangqiang Xie ◽  
Simon A. Wilde ◽  
Yuqing Wang ◽  
...  
Keyword(s):  
Oceanic Crust ◽  
North China Craton ◽  
North China ◽  
The North ◽  
Greenstone Belts ◽  
Western Shandong
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