全吉群碎屑锆石的U-Pb年龄谱和微量元素：基底热事件信息和早期演化启示

张璐; 巴金; 陈能松; 王勤燕; 廖梵汐; 李晓彦

doi:10.3799/dqkx.2012.S1.004

Volume 37 Issue S1

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ZHANG Lu, BA Jin, CHEN Neng-song, WANG Qin-yan, LIAO Fan-xi, LI Xiao-yan, 2012. U-Pb Age Spectra and Trace Elements of Detrital Zircon from Quanji Group: Implications for Thermal Events and Early Evolution in the Basement. Earth Science, 37(S1): 28-42. doi: 10.3799/dqkx.2012.S1.004

Citation:

ZHANG Lu, BA Jin, CHEN Neng-song, WANG Qin-yan, LIAO Fan-xi, LI Xiao-yan, 2012. U-Pb Age Spectra and Trace Elements of Detrital Zircon from Quanji Group: Implications for Thermal Events and Early Evolution in the Basement. Earth Science, 37(S1): 28-42. doi: 10.3799/dqkx.2012.S1.004

Citation:

ZHANG Lu, BA Jin, CHEN Neng-song, WANG Qin-yan, LIAO Fan-xi, LI Xiao-yan, 2012. U-Pb Age Spectra and Trace Elements of Detrital Zircon from Quanji Group: Implications for Thermal Events and Early Evolution in the Basement. Earth Science, 37(S1): 28-42. doi: 10.3799/dqkx.2012.S1.004

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U-Pb Age Spectra and Trace Elements of Detrital Zircon from Quanji Group: Implications for Thermal Events and Early Evolution in the Basement

doi: 10.3799/dqkx.2012.S1.004

ZHANG Lu^{1, 2},
BA Jin^{1, 2},
CHEN Neng-song^{1, 3
,
,},
WANG Qin-yan¹,
LIAO Fan-xi^{1, 2},
LI Xiao-yan⁴

1.
Faculty of Earth Sciences, China University of Geosciences, Wuhan 430074, China
2.
Graduate School, China University of Geosciences, Wuhan 430074, China
3.
State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan 430074, China
4.
Institute of Geoscience Mineralogy and Geochemistry, University of Freiburg, Freiburg 79104, Germany

Received Date: 2011-09-03
Available Online: 2021-11-15
Publish Date: 2012-05-01

Abstract

Abstract

LA-ICP-MS U-Pb age and trace elements composition have been conducted from 111 spots analyses on detrital zircons from the sandstone of the lower Nanhua-Sinian Quanji Group, the unmetamorphosed sedimentary cover on the Quanji massif (a continental fragment separated from the Tarim block). The age spectra from 87 concordant ages records strong ~2.45, ~2.32, ~2.11 and ~1.95 Ga thermal events in the Paleoproterozoic and two weak thermal events in the Neoarchean time, and indicates that sediments of quartzo-sandstone were derived from the basement comprising of the Dakendaban Group and Delingha complex with unexposed Ended-Paleoproterozoic mafic dike swarm in the middle to eastern Quanji massif. CL images and trace elements of the detrital zircons suggest that the ~2.45, ~2.32 and ~2.11 Ga thermal events are characterized by magmatic intrusion along with crustal growth and the ~1.95 Ga event by strong regional metamorphism and anatexis, with magmatic intrusion a possible event that could not be ruled out. Our new data demonstrate that basement of the Quanji massif and its inherited Tarim craton are mainly composed of Paleoproterozoic rocks, however, they regionally developed magmatic intrusions accompanying crustal growth during ~2.32-2.45 Ga, thus share a similar geological evolution history or probably ever interacted with the North China craton in their early history.
- detrital zircon age spectra,
- trace elements,
- Quanji massif,
- Tarim block,
- thermal events,
- crustal evolution,
- petrology

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