Petrological Characteristics and Emplacement Mechanism of the Gaoqiaogou Granitic Porphyry in the Hannan Complex: A Geochemistry Approach

WU Xinbin; WU Fan; MAO Youliang; LI Yan

doi:10.12401/j.nwg.2022047

2023 Vol. 56, No. 4

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Article navigation > Northwestern Geology > 2023 > 56(4): 329-335

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WU Xinbin, WU Fan, MAO Youliang, LI Yan. 2023. Petrological Characteristics and Emplacement Mechanism of the Gaoqiaogou Granitic Porphyry in the Hannan Complex: A Geochemistry Approach. Northwestern Geology, 56(4): 329-335. doi: 10.12401/j.nwg.2022047

Citation:

WU Xinbin, WU Fan, MAO Youliang, LI Yan. 2023. Petrological Characteristics and Emplacement Mechanism of the Gaoqiaogou Granitic Porphyry in the Hannan Complex: A Geochemistry Approach. Northwestern Geology, 56(4): 329-335. doi: 10.12401/j.nwg.2022047

Petrological Characteristics and Emplacement Mechanism of the Gaoqiaogou Granitic Porphyry in the Hannan Complex: A Geochemistry Approach

Shaanxi Geology and Mineral Resources Hanzhong Geology Brigade Co Ltd, Hanzhong 723000, Shaanxi, China

Received Date: 11 November 2021

Revised Date: 11 August 2022

Publish Date: 20 August 2023

Abstract

Abstract

Gaoqiaogou granite porphyry is a part of Hannan Complex, which is located in the northern margin of the Yangtze plate. LA−MCP−MS U−Pb dating of Zircon indicates that the Zircon was formed at (794.4±5.7) Ma in the early South China epoch. The Rock Geochemistry is characterized by high silicon (75.78%～76.51%) , high alkali (K₂O＋Na₂O=7.78%～7.84%) , high potassium (K₂O/Na₂O=1.07～1.10) , high potassium calcium alkaline series, total rare earth elements ∑REE=272.57×10^–6, and obvious fractionation between light and heavy rare earth elements. The monzonitic granite porphyry was formed in the middle and late stage of magmatic evolution. The material of partial melting sedimentary rock and volcanic rock in the process of magma intrusion. The Gaoqiaogou granite porphyry was formed in the post-orogenic tectonic environment and emplaced strongly.
- Hannan complex /
- granitic porphyry /
- early Nanhua period /
- geochemistry features /
- emplacement mechanism

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References

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