Zircon U-Pb Dating and Petrogenesis of Volcanic Rocks in Hadataolegai Formation， Middle Great Xing’an Range

doi:10.12068/j.issn.1005-3026.2018.12.021

Journal of Northeastern University Natural Science ›› 2018, Vol. 39 ›› Issue (12): 1779-1782.DOI: 10.12068/j.issn.1005-3026.2018.12.021

• Resources & Civil Engineering • Previous Articles Next Articles

Zircon U-Pb Dating and Petrogenesis of Volcanic Rocks in Hadataolegai Formation， Middle Great Xing’an Range

SI Qiu-liang^1,2， WANG En-de¹， TANG Zhen²， MA Yong-fei²

1. School of Resources & Civil Engineering， Northeastern University， Shenyang 110819， China; 2. Shenyang Center， China Geological Survey， Shenyang 110034， China.

Received:2017-02-24 Revised:2017-02-24 Online:2018-12-15 Published:2018-12-19
Contact: SI Qiu-liang
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Abstract

Abstract: Zircon U-Pb isotopic dating and geochemical analysis were used to study the formation age and petrogenesis of the volcanic rocks in Hadataolegai Formation， the middle Great Xing’an Range. LA-ICP-MS dating results show that the volcanic rocks in Hadataolegai Formation formed in Middle Triassic from 234Ma to 244Ma. The geochemical study suggests that the volcanic rocks are poor in silicon，rich in alkalis， calcium and magnesium. The total RE amount ranges from 122.32×10^-6 to 140.66×10^-6. Fractionation of LRE and HRE is obvious［m(La)/m(Yb)_N=11.99~18.68］ and Eu has no anomalies (δ_Eu=0.84~0.98). The trace element geochemistry are characterized evidently by enrichment of Rb， K， Ba， Th， and depletion of Nb， P， Ti. Original magma of the volcanic in Hadataolegai Formation is chiefly derived from enriched lithospheric mantle， and contaminated by crustal material.

Key words: zircon U-Pb dating, geochemistry, Hadataolegai Formation, volcanic rocks, middle Great Xing’an Range

CLC Number:

SI Qiu-liang， WANG En-de， TANG Zhen， MA Yong-fei. Zircon U-Pb Dating and Petrogenesis of Volcanic Rocks in Hadataolegai Formation， Middle Great Xing’an Range[J]. Journal of Northeastern University Natural Science, 2018, 39(12): 1779-1782.

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Zircon U-Pb Dating and Petrogenesis of Volcanic Rocks in Hadataolegai Formation， Middle Great Xing’an Range

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