Geochemistry, Zircon U-Pb Geochronology and Hf-O Isotopes of the Banzhusi Granite Porphyry from the Xiong’ershan Area, East Qinling Orogen, China: Implications for Petrogenesis and Geodynamics
The Banzhusi granite porphyry is located in the Xiong’ershan area, East Qinling orogenic belt (EQOB). This study presents an integrated whole-rock geochemistry and zircon U-Pb-Hf-O isotope analysis of the Banzhusi granite porphyry. These rocks have metaluminous, high-K alkali-calcic and sh...
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doaj-5a0555ad17624887a262e0393a56016e2020-11-25T02:14:10ZengMDPI AGMinerals2075-163X2019-09-019953810.3390/min9090538min9090538Geochemistry, Zircon U-Pb Geochronology and Hf-O Isotopes of the Banzhusi Granite Porphyry from the Xiong’ershan Area, East Qinling Orogen, China: Implications for Petrogenesis and GeodynamicsBin Wang0Xinkai Hu1Li Tang2Jingchao Li3Development and Research Center, China Geological Survey, Beijing 100037, ChinaSchool of Earth Sciences and Resources, China University of Geosciences Beijing, Beijing 100083, ChinaSchool of Earth Sciences and Resources, China University of Geosciences Beijing, Beijing 100083, ChinaDevelopment and Research Center, China Geological Survey, Beijing 100037, ChinaThe Banzhusi granite porphyry is located in the Xiong’ershan area, East Qinling orogenic belt (EQOB). This study presents an integrated whole-rock geochemistry and zircon U-Pb-Hf-O isotope analysis of the Banzhusi granite porphyry. These rocks have metaluminous, high-K alkali-calcic and shoshonitic features and show significant enrichment in light rare earth elements (LREEs) over heavy rare earth elements (HREEs) with negative Eu anomalies. These samples are also greatly enriched in Rb, Ba, K, Pb, Th and U and depleted in Nb, Ta, P and Ti, and they mostly overlap the ranges of the Taihua Group tonalite−trondhjemite−granodiorite (TTG) gneiss. Magmatic zircons from three samples of the Banzhusi granite porphyry yield U-Pb ages of 125.1 ± 0.97 Ma, 128.1 ± 1.2 Ma and 128.2 ± 1.3 Ma. The Hf-O isotope features of zircons from the three samples are very similar (δ<sup>18</sup>O<sub>zircon</sub> = 4.84‱ to 6.51‱, εHf<sub>(t)</sub> = −26.9 to −14.4). The co-variations of geochemical and isotopic data in these granite porphyries imply that the Banzhusi granite porphyry resulted from the mixing of the partially melted Taihua Group and mantle-derived material in a post-collisional setting from 128−125 Ma.https://www.mdpi.com/2075-163X/9/9/538geochemistryzircon U-Pb geochronologyzircon Hf-O isotopesBanzhusi granite porphyryEast Qinling |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Bin Wang Xinkai Hu Li Tang Jingchao Li |
spellingShingle |
Bin Wang Xinkai Hu Li Tang Jingchao Li Geochemistry, Zircon U-Pb Geochronology and Hf-O Isotopes of the Banzhusi Granite Porphyry from the Xiong’ershan Area, East Qinling Orogen, China: Implications for Petrogenesis and Geodynamics Minerals geochemistry zircon U-Pb geochronology zircon Hf-O isotopes Banzhusi granite porphyry East Qinling |
author_facet |
Bin Wang Xinkai Hu Li Tang Jingchao Li |
author_sort |
Bin Wang |
title |
Geochemistry, Zircon U-Pb Geochronology and Hf-O Isotopes of the Banzhusi Granite Porphyry from the Xiong’ershan Area, East Qinling Orogen, China: Implications for Petrogenesis and Geodynamics |
title_short |
Geochemistry, Zircon U-Pb Geochronology and Hf-O Isotopes of the Banzhusi Granite Porphyry from the Xiong’ershan Area, East Qinling Orogen, China: Implications for Petrogenesis and Geodynamics |
title_full |
Geochemistry, Zircon U-Pb Geochronology and Hf-O Isotopes of the Banzhusi Granite Porphyry from the Xiong’ershan Area, East Qinling Orogen, China: Implications for Petrogenesis and Geodynamics |
title_fullStr |
Geochemistry, Zircon U-Pb Geochronology and Hf-O Isotopes of the Banzhusi Granite Porphyry from the Xiong’ershan Area, East Qinling Orogen, China: Implications for Petrogenesis and Geodynamics |
title_full_unstemmed |
Geochemistry, Zircon U-Pb Geochronology and Hf-O Isotopes of the Banzhusi Granite Porphyry from the Xiong’ershan Area, East Qinling Orogen, China: Implications for Petrogenesis and Geodynamics |
title_sort |
geochemistry, zircon u-pb geochronology and hf-o isotopes of the banzhusi granite porphyry from the xiong’ershan area, east qinling orogen, china: implications for petrogenesis and geodynamics |
publisher |
MDPI AG |
series |
Minerals |
issn |
2075-163X |
publishDate |
2019-09-01 |
description |
The Banzhusi granite porphyry is located in the Xiong’ershan area, East Qinling orogenic belt (EQOB). This study presents an integrated whole-rock geochemistry and zircon U-Pb-Hf-O isotope analysis of the Banzhusi granite porphyry. These rocks have metaluminous, high-K alkali-calcic and shoshonitic features and show significant enrichment in light rare earth elements (LREEs) over heavy rare earth elements (HREEs) with negative Eu anomalies. These samples are also greatly enriched in Rb, Ba, K, Pb, Th and U and depleted in Nb, Ta, P and Ti, and they mostly overlap the ranges of the Taihua Group tonalite−trondhjemite−granodiorite (TTG) gneiss. Magmatic zircons from three samples of the Banzhusi granite porphyry yield U-Pb ages of 125.1 ± 0.97 Ma, 128.1 ± 1.2 Ma and 128.2 ± 1.3 Ma. The Hf-O isotope features of zircons from the three samples are very similar (δ<sup>18</sup>O<sub>zircon</sub> = 4.84‱ to 6.51‱, εHf<sub>(t)</sub> = −26.9 to −14.4). The co-variations of geochemical and isotopic data in these granite porphyries imply that the Banzhusi granite porphyry resulted from the mixing of the partially melted Taihua Group and mantle-derived material in a post-collisional setting from 128−125 Ma. |
topic |
geochemistry zircon U-Pb geochronology zircon Hf-O isotopes Banzhusi granite porphyry East Qinling |
url |
https://www.mdpi.com/2075-163X/9/9/538 |
work_keys_str_mv |
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