THE PETROLOGY, GEOCHEMICAL CHARACTERISTICS AND ORIGIN OF THE NAPENG GRANITE MASS FORMED IN INDO-CHINA PERIOD IN THE WEST OF GUANGDONG PROVINCE

LI Kun; SUN Wan-cai; DENG Fei

Volume 23 Issue 3

Jun. 2017

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LI Kun, SUN Wan-cai, DENG Fei, 2017. THE PETROLOGY, GEOCHEMICAL CHARACTERISTICS AND ORIGIN OF THE NAPENG GRANITE MASS FORMED IN INDO-CHINA PERIOD IN THE WEST OF GUANGDONG PROVINCE. Journal of Geomechanics, 23 (3): 411-421.

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THE PETROLOGY, GEOCHEMICAL CHARACTERISTICS AND ORIGIN OF THE NAPENG GRANITE MASS FORMED IN INDO-CHINA PERIOD IN THE WEST OF GUANGDONG PROVINCE

Foshan Geological Bureau of Guangdong Province, Foshan 528000, China

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Received: 2016-11-14
Published: 2017-06-01

Abstract

Abstract

The Napeng granite mass is the product of migmatization and granitization, in which major lithologies are medium-fine grained (porphyritic) biotite monzonitic migmatitic granite and weak gneissic fine grained biotite monzonitic migmatitic granite, rich in a number of Al-rich minerals such as cordierite, fibrolite, bucholzite, andalusite and so on. The lithologies closed to the edge of Napeng granite mass are migmatitic gneiss and granitic gneiss, migrating to the surrounding rocks. By means of LA-ICP-MS Zircon U-Pb isotope dating on the medium-fine grained biotite monzonitic migmatitic granite, it is found that metamorphic zircons are the main zircons and few are magmatic zircons, and it is determined that the diagenetic age of the Napeng granite mass is 252±1.9Ma, the early Triassic age, in the tectonic environment of collision orogeny.
- the west of Guangdong Province,
- the Napeng granite mass,
- migmatization,
- granitization,
- Zircon U-Pb age,
- Early Triassic,
- collision orogeny

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References(11)

References

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