| SHRIMP U-Pb Zircon Age of the Ka'erjiao Intrusion in the Sawur Region in West Junggar,Xinjiang |
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| 作者姓名： | ZHOU Taofa TAN Lugui FAN Yu YUAN Feng YANG Wenping HE Lixin and YUE Shucang School of Resources and Environmental Engineering Hefei University of Technology Hefei Anhui No. Geological Party Xinjiang Bureau of Geological Exploration Altay Xinjiang |
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| 作者单位： | ZHOU Taofa，TAN Lugui，FAN Yu，YUAN Feng，YANG Wenping，HE Lixin and YUE Shucang School of Resources and Environmental Engineering，Hefei University of Technology，Hefei，Anhui 230009 No. 4 Geological Party，Xinjiang Bureau of Geological Exploration，Altay，Xinjiang 836500 |
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| 摘 要： | Acid intrusions are widespread in the Sawur region, Xinjiang. The Ka'erjiao intrusion is mainly composed of albite granite porphyry, K-feldspar granite porphyry, ivernite and granite porphyry. Being a transitional product between magma intrusion and eruption in the Sawur region, the Ka'erjiao intrusion was formed at the telophase of the late Carboniferous to the begining of early Permian as determined by the SHRIMP U-Pb zircon dating, with an age of 302.6±7.6 Ma (1σ). The intrusion consists of alkali-enriched rock, whose REE distribution patterns are of the LREE enrichment type, theδEu value is low and Nd, Sr, Pb isotopes reflect its mantle source characteristics. Theδ18O value of intrusion is low as a result of isotope exchange with meteoric water. The geochemical characteristics show that it was formed in a post-collisional tectonic setting. Taking combined considerations of current studies of A-type granites and Permian volcanic rocks, we think that in the telophase of the late Carboniferous to the beginning of the early Permian, the Sawur region was within the extension or compressional to extensional period of a post-collisional stage. The Ka'erjiao intrusion from mantle sources can confirm the vertical continental crust growth in the late Paleozoic. The Sawur region in west Junggar is consistent with east Junggar in post-collisional tectonic evolution process.
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SHRIMP U-Pb Zircon Age of the Ka'erjiao Intrusion in the Sawur Region in West Junggar,Xinjiang |
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| Authors: | ZHOU Taofa TAN Lugui FAN Yu YUAN Feng YANG Wenping HE Lixin and YUE Shucang School of Resources and Environmental Engineering Hefei University of Technology Hefei Anhui No Geological Party Xinjiang Bureau of Geological Exploration Altay Xinjiang |
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| Institution: | ZHOU Taofa,TAN Lugui,FAN Yu,YUAN Feng,YANG Wenping,HE Lixin and YUE Shucang School of Resources and Environmental Engineering,Hefei University of Technology,Hefei,Anhui 230009 No. 4 Geological Party,Xinjiang Bureau of Geological Exploration,Altay,Xinjiang 836500 |
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| Abstract: | |
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| Keywords: | granite zircon SHRIMP data post-collision Sawur region Xinjiang |
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