40 Ar/39 Ar Geochronology of the Late Paleozoic Woniusi Basalts from the Baoshan Terrane, SW China: Implications for the Rifting of the Northern Margin of Gondwana

2018 ◽  
Vol 92 (3) ◽  
pp. 1276-1278
Author(s):  
Jun CAO
Keyword(s):  
Late Paleozoic ◽  
Sw China ◽  
Northern Margin ◽  
Ar Geochronology

Gold deposits of the northern margin of the North China Craton: multiple late Paleozoic–Mesozoic mineralizing events

2002 ◽  
Vol 37 (3) ◽  
pp. 326-351 ◽  
Author(s):  
Craig J. Hart ◽  
Richard J. Goldfarb ◽  
Yumin Qiu ◽  
Lawrence Snee ◽  
Lance D. Miller ◽  
...  
Keyword(s):  
North China Craton ◽  
North China ◽  
Gold Deposits ◽  
Late Paleozoic ◽  
Northern Margin ◽  
The North

Petrogenesis of the southern Qiangtang mafic dykes, Tibet: Link to a late Paleozoic mantle plume on the northern margin of Gondwana?

2019 ◽  
Vol 131 (11-12) ◽  
pp. 1907-1919 ◽  
Author(s):  
Ming Wang ◽  
Cai Li ◽  
Xiao-Wen Zeng ◽  
Hang Li ◽  
Jian-Jun Fan ◽  
...  
Keyword(s):  
Partial Melting ◽  
Mantle Plume ◽  
Inductively Coupled Plasma ◽  
Crustal Contamination ◽  
Late Paleozoic ◽  
Magmatic Zircon ◽  
Early Permian ◽  
Northern Margin ◽  
Inductively Coupled ◽  
Gondwana Margin

AbstractThis study presents 13 new U-Pb zircon ages obtained by laser ablation–inductively coupled plasma–mass spectrometry (LA-ICP-MS) together with whole-rock geochemical, Sr-Nd isotopic and zircon Hf isotopic data for a mafic dike swarm in the southern Qiangtang area of Tibet. These data provide the basis for a new model of the late Paleozoic evolution of the Tethys. Combined with the results of previous zircon U-Pb dating, the magmatic zircon grains extracted from mafic dikes yield latest Carboniferous to Early Permian ages (317–279 Ma). The geochemistry of the southern Qiangtang mafic rocks indicates the presence of low-Ti (QLT) and high-Ti (QHT) suites. The magmas that formed the QLT suite underwent higher degrees of partial melting (>5%) and display evidence of crustal contamination, whereas the QHT suite was derived from magmas generated by low-degree (1%–5%) partial melting of a garnet-bearing mantle source, with a greater extent of fractional crystallization than the QLT suite, and no evidence of crustal contamination. We propose that the QHT and QLT suites may have been derived from magmas from different parts of a single mantle plume. The formation of the southern Qiangtang mafic dikes (latest Carboniferous to Early Permian; 317–279 Ma) may have been related to the northward drift of the Cimmerian continent from the northern Gondwana margin, which resulted in the opening of the Meso-Tethys Ocean.

scholarly journals Late Paleozoic subduction system in the northern margin of the Alxa block, Altaids: Geochronological and geochemical evidences from ophiolites

2014 ◽  
Vol 25 (2) ◽  
pp. 842-858 ◽  
Author(s):  
Rongguo Zheng ◽  
Tairan Wu ◽  
Wen Zhang ◽  
Cao Xu ◽  
Qingpeng Meng ◽  
...  
Keyword(s):  
Late Paleozoic ◽  
Northern Margin ◽  
Subduction System
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