NDLI: SHRIMP zircon U-Pb dating and its geological significance of Chibaisong gabbro in Tonghua area, Jilin Province, China

Content Provider	Springer Nature Link
Author	Pei, Fuping Xu, Wenliang Yang, Debin Zhao, Quanguo
Copyright Year	2006
Abstract	SHRIMP zircon U-Pb dating for Chibaisong No.1 gabbro in the Tonghua area, Jilin Province, is discussed in the paper. The cathodoluminescence (CL) images of the zircons indicate that they can be divided into two major types, i.e. euhedral-subhedral one with striped absorption and round one with obvious oscillatory zoning rims. The dating results of the zircons suggest that Chibaisong gabbro in the Tonghua area was formed at 134 ± 7Ma—the Early Cretaceous. The concordia ages of 2497 ± 13Ma, 787 ± 35Ma, 321 ± 10Ma, 217 ± 11Ma of zircons imply that the Tonghua area might geologically be located in the convergent region of the Yangtze Block (YB) and the North China Block (NCB) in the early Mesozoic and the zircons should be caught during magma intrusion. The existence of the Early Cretaceous basic dyke swarm in the Tonghua area shows that an intensive extensional environment occurred in the Early Cretaceous. It is suggested that the magmatism and lithospheric extension in the Tonghua area should be related to the subduction of the Pacific plate.
Starting Page	368
Ending Page	374
Page Count	7
File Format	PDF
ISSN	10069313
Journal	Science in China Series D: Earth Sciences
Volume Number	49
Issue Number	4
e-ISSN	18622801
Language	English
Publisher	Science in China Press
Publisher Date	2006-03-25
Publisher Place	Beijing
Access Restriction	Subscribed
Subject Keyword	zircon gabbro SHRIMP U-Pb dating Tonghua area Geosciences
Content Type	Text
Resource Type	Article
Subject	Earth and Planetary Sciences

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