北京周口店太平山南坡晚古生代碎屑锆石U-Pb年代学及其大地构造意义

张航川; 徐亚军; 杜远生; 王国庆; 杨坤光

doi:10.3799/dqkx.2018.548

Volume 43 Issue 6

Jun. 2018

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Article Navigation > Earth Science > 2018 > 43(6): 2100-2115

Zhang Hangchuan, Xu Yajun, Du Yuansheng, Wang Guoqing, Yang Kunguang, 2018. Detrital Zircon Geochronology of Late Paleozoic Strata from Southern Hillside of Taiping Hill in Zhoukoudian Area, Beijing and Their Tectonic Implications. Earth Science, 43(6): 2100-2115. doi: 10.3799/dqkx.2018.548

Citation:

Zhang Hangchuan, Xu Yajun, Du Yuansheng, Wang Guoqing, Yang Kunguang, 2018. Detrital Zircon Geochronology of Late Paleozoic Strata from Southern Hillside of Taiping Hill in Zhoukoudian Area, Beijing and Their Tectonic Implications. Earth Science, 43(6): 2100-2115. doi: 10.3799/dqkx.2018.548

Citation:

Zhang Hangchuan, Xu Yajun, Du Yuansheng, Wang Guoqing, Yang Kunguang, 2018. Detrital Zircon Geochronology of Late Paleozoic Strata from Southern Hillside of Taiping Hill in Zhoukoudian Area, Beijing and Their Tectonic Implications. Earth Science, 43(6): 2100-2115. doi: 10.3799/dqkx.2018.548

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Detrital Zircon Geochronology of Late Paleozoic Strata from Southern Hillside of Taiping Hill in Zhoukoudian Area, Beijing and Their Tectonic Implications

doi: 10.3799/dqkx.2018.548

School of Earth Sciences, China University of Geosciences, Wuhan 430074, China

Received Date: 2018-12-16
Publish Date: 2018-06-15

Abstract

Abstract

The Late Paleozoic siliciclastic rocks outcrop in the southern hillside of Taiping hill, Zhoukoudian area. In order to trace sediment provenance and unravel the tectonic evolution of the North China craton and its surrounding plates, U-Pb dating and Hf isotopic analyses were performed on detrital zircons from this succession. U-Pb ages of five samples can be divided into three groups:Phanerozoic (285-425 Ma), Paleoproterozoic (1 700-2 450 Ma) and Neoarchean (2 500-2 747 Ma). Precambrian zircons show obvious age peaks at 2.5 Ga and 1.8 Ga, which are similar to those of basement rocks of the North China Craton. Phanerozoic zircons from five samples are predominantly distributed in the range of 308-297 Ma, with the youngest peaks varying from 299 to 291 Ma. U-Pb ages of the youngest zircons are consistent with the Early Permian depositional age, suggesting that these zircons are synsedimentary detritus. Characteristics of age spectra of the Phanerozoic zircons are similar to those of coeval igneous rocks outcropped in the Inner Mongolia paleo-uplift to the north, which suggests the source of Phanerozoic zircons. The ¹⁷⁶Hf/¹⁷⁷Hf and ε_Hf(t) values of 29 synsedimentary zircons range from 0.282 021 to 0.282 318 and -20.1 to -9.1, respectively, which are consistent with those of active arc rocks in the Inner Mongolia paleo-uplift, rather than the Xing-Meng orogenic belt. Minor detritus from the Early Paleozoic arc rocks in the southern orogen of the Xing-Meng orogen also flowed into the basin. Trace elements of Early Permian synsedimentary zircons are characterized by those of zircons crystallized in the environment of continent arc and active continental boundary. The results suggest that:(1) the northern margin of the North China craton was an Andean-type continental margin during the Late Carboniferous to Early Permian period, (2) rapid rise of the Inner Mongolia paleo-uplift was attributed to the subduction of Paleo-Asian ocean under the northern margin of the craton, and (3) closure of the Paleo-Asian ocean should be later than the Early Permian.
- North China craton,
- Zhoukoudian area,
- provenance,
- zircon,
- Paleo-Asian ocean,
- tectonics,
- geochronology

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Detrital Zircon Geochronology of Late Paleozoic Strata from Southern Hillside of Taiping Hill in Zhoukoudian Area, Beijing and Their Tectonic Implications

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