南秦岭佛坪片麻岩穹隆变质作用及与岩浆作用的关系

陈龙耀; 刘志慧; 刘晓春; 刘树文

doi:10.3799/dqkx.2019.236

Volume 44 Issue 12

Dec. 2019

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Article Navigation > Earth Science > 2019 > 44(12): 4178-4185

Chen Longyao, Liu Zhihui, Liu Xiaochun, Liu Shuwen, 2019. Metamorphism and Its Relation of Magmatism of the Foping Gneiss Dome in the South Qinling Tectonic Belt. Earth Science, 44(12): 4178-4185. doi: 10.3799/dqkx.2019.236

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Chen Longyao, Liu Zhihui, Liu Xiaochun, Liu Shuwen, 2019. Metamorphism and Its Relation of Magmatism of the Foping Gneiss Dome in the South Qinling Tectonic Belt. Earth Science, 44(12): 4178-4185. doi: 10.3799/dqkx.2019.236

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Metamorphism and Its Relation of Magmatism of the Foping Gneiss Dome in the South Qinling Tectonic Belt

doi: 10.3799/dqkx.2019.236

1.
Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China
2.
Department of Environmental Sciences, Hebei University of Enviromental Engineering, Qinghuangdao 066102, China
3.
School of Earth and Space Sciences, Peking University, Beijing 100871, China

Received Date: 2019-08-25
Publish Date: 2019-12-15

Abstract

Abstract

The Foping gneiss dome in the South Qinling tectonic belt is one of the most typical gneiss domes. The gneiss dome has records the multi-stage tectonic evolution from syn-collision orogeny to post-orogenic extension, and therefore is critical to understanding the Early Mesozoic tectonic evolution of the Qinling orogen. The studies on field work, petrography, mineral chemistry, and conventional geothermobarometry show that Foping gneiss dome has typical metamorphic zoning, with metamorphic temperature gradually decreasing from the Precambrian basement in the core to the sedimentary covers in the north and south flanks. Zircon LA-ICP-MS U-Pb dating of different types of rocks and monazite SHRIMP U-Pb dating of the metapelites give a consistent metamorphic age of ca. 206-196 Ma. In combination with the investigation of Early Mesozoic granitoids in the South Qinling tectonic belt, the authors infer that the metamorphism of the Foping gneiss dome was induced by Late Triassic magmatic diapir in a post-collisional extensional setting.
- South Qinling tectonic belt,
- Foping,
- gneiss dome,
- progressive metamorphic zone,
- petrology

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References(55)

References

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Metamorphism and Its Relation of Magmatism of the Foping Gneiss Dome in the South Qinling Tectonic Belt

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