PDF(6440 KB)
古特提斯演化的岩浆作用记录：来自桂东南印支期火山岩证据
覃悦, 蔡永丰, 刘军, 刘希军, 周云, 李政林, 杨栎娅
PDF(6440 KB)
PDF(6440 KB)
古特提斯演化的岩浆作用记录：来自桂东南印支期火山岩证据
Magmatism Records of Palaeo-Tethyan Evolution: Evidence from Indosinian Volcanic Rocks in Southeastern Guangxi
,
,
为了探讨古特提斯构造演化是否在华南大陆西南缘保存有岩浆作用记录，本文对桂东南印支期火山岩开展了年代学和元素地球化学分析.研究结果表明，两个代表性英安斑岩样品分别给出了（245±2） Ma和（247±4） Ma的形成时代，表明桂东南发育早‒中三叠世火山作用.英安斑岩具有高钾、富铝、贫钛、贫镁的特征，表现出准铝质高钾钙碱性岩石的特征.样品总体富集Rb、Th、U，亏损Ti、Ba、P、Sr，Nb、Ta负异常明显.轻、重稀土分馏较明显，Eu具中等负异常.综合分析表明，英安斑岩主要来源于地壳物质的熔融，并经历了一定程度的分离结晶作用；桂东南与海南岛、金沙江、哀牢山一带的印支早期岩浆岩在岩石类型、地球化学特征、沉积序列和古生物化石方面均具有可对比性，暗示这些地区在印支早期可能经历了相似的构造演化事件，主要受控于古特提斯构造域，推测桂东南于早‒中三叠世进入同碰撞阶段.
To determine the availability of the magmatism records of Palaeo-Tethyan evolution in the southeastern margin of the South China continent, detailed LA-ICP-MS zircon U-Pb geochronological and elemental geochemical analyses of the Indosinian volcanic rocks in the southeastern Guangxi have been carried out in this paper. Geochronological results show that two representative dacite porphyry samples yield zircon U-Pb ages of (245±2) Ma and (247±4) Ma, respectively, indicating that Early to Middle Triassic volcanism occurred in the southeastern Guangxi. Elemental geochemical results show that the dacite porphyry is characterized by high K2O and Al2O3 contents, and low TiO2 and MgO contents, belonging to the metaluminous high-K calc-alkaline series rocks. The samples show enrichment in Rb, Th, and U, and are characterized by negative Ba, Ti, Sr, P, and Nb-Ta anomalies. They also show obvious LREE and HREE fractionation, and have moderate negative Eu anomalies. The above data indicate that the dacite porphyry mainly originated from the melting of crustal materials, and fractional crystallization occurred during the process of magmatic evolution. Combined with regional geological data, it is suggested that the Indosinian magmatic rock assemblages, geochemical characteristics, sedimentary sequences, and paleontological fossils in the southeastern Guangxi are comparable to those in the Hainan Island and Jinshajiang-Ailaoshan regions, suggesting that these regions may have experienced similar tectonic events during the Indosinian Period, which were mainly controlled by the Palaeo-Tethyan tectonic domain during the Indosinian. The formation of the Indosinian dacite porphyry in southeastern Guangxi possibly represents a syn-collisional stage during the Early to Middle Triassic.
英安斑岩 / 锆石U-Pb年龄 / 地球化学 / 古特提斯 / 桂东南钦防地区 / 岩石学.
dacite porphyry / zircon U-Pb geochronology / geochemistry / Palaeo-Tethyan / Qinfang area in southeast Guangxi / petrology
P595 / P597
|
Chen, C. H., Hsieh, P. S., Lee, C. Y., et al., 2011. Two Episodes of the Indosinian Thermal Event on the South China Block: Constraints from LA-ICPMS U-Pb Zircon and Electron Microprobe Monazite Ages of the Darongshan S-Type Granitic Suite. Gondwana Research, 19(4): 1008-1023. https://doi.org/10.1016/j.gr.2010.10.009
|
|
Dai, B. Z., Jiang, S. Y., Jiang, Y. H., et al., 2008. Geochronology, Geochemistry and Hf-Sr-Nd Isotopic Compositions of Huziyan Mafic Xenoliths, Southern Hunan Province, South China: Petrogenesis and Implications for Lower Crust Evolution. Lithos, 102(1): 65-87. https://doi.org/10.1016/j.lithos.2007.08.010
|
|
Deng, X. G., Chen, Z. G., Li, X. H., et al., 2004.SHRIMP U-Pb Zircon Dating of the Darongshan- Shiwandashan Granitoid Belt in Southeastern Guangxi, China. Geological Review, 50(4): 426-432 (in Chinese with English abstract).
|
|
Deng, X. G., Li, X. H., Chen, Z. G., 2003. Geochemical Features and Sedimentary Setting of Late Devonian Cherts in Bancheng of Qinzhou, Guangxi. Chinese Journal of Geology, 38(4): 460-469 (in Chinese with English abstract).
|
|
Ding, X., Chen, P. R., Chen, W. F., et al., 2005. LA-ICP-MS U-Pb Zircon Dating in Weishan Granites, Hunan Province: Implications and Significance for Diagenesis. Science in China (Series D), 35(7): 606-616 (in Chinese).
|
|
Feng, K., Li, R. B., Pei, X. Z., et al., 2022. Zircon U-Pb Chronology, Geochemistry and Geological Significance of Late Triassic Intermediate-Acid Volcanic Rocks in Boluositai Area, East Kunlun Orogenic Belt. Earth Science, 47(4): 1194-1216 (in Chinese with English abstract).
|
|
Feng, Q. L., Liu, B. P., 2002. Early Permian Radiolarians from Babu Ophiolitic Mélange in Southeastern Yunnan. Earth Science, 27(1): 1-3, 127-128 (in Chinese with English abstract).
|
|
Gan, C. S., Wang, Y. J., Zhang, Y. Z., et al., 2021. The Assembly of the South China and Indochina Blocks: Constraints from the Triassic Felsic Volcanics in the Youjiang Basin. GSA Bulletin, 133(9/10): 2097-2112. https://doi.org/10.1130/b35816.1
|
|
Gao, Q. L., Chen, Z. Q., Zhang, N., et al., 2022. Felsic Volcanisms Across the Wuchiapingian Changhsingian Boundary (Late Permian) in the Dawoling Section, Jiahe Area, Hunan Province. Earth Science, 47(8): 2925-2939 (in Chinese with English abstract).
|
|
Gou, Q. Y., Qian, X., He, H. Y., et al., 2019. Geochronological and Geochemical Constraints on Lizhigou Middle Triassic Felsic Volcanic Rocks in Hainan and Its Tectonic Implications. Earth Science, 44(4): 1357-1370 (in Chinese with English abstract).
|
|
He, H. Y., Wang, Y. J., Liu, H. C., et al., 2016.Geochemical and Geochronological Characteristics of the Fengmu Mafic Rocks in Hainan and Its Tectonic Implications. Acta Scientiarum Naturalium Universitatis Sunyatseni, 55(4): 146-157 (in Chinese with English abstract).
|
|
Hou, Z. Q., Mo, X. X., Gao, Y. F., et al., 2006. Early Processes and Tectonic Model for the Indian-Asian Continental Collision: Evidence from the Cenozoic Gangdese Igneous Rocks in Tibet. Acta Geologica Sinica, 80(9): 1233-1248 (in Chinese with English abstract).
|
|
Hu, L. S., Cawood, P. A., Du, Y. S., et al., 2017. Permo-Triassic Detrital Records of South China and Implications for the Indosinian Events in East Asia. Palaeogeography, Palaeoclimatology, Palaeoecology, 485: 84-100. https://doi.org/10.1016/j.palaeo.2017.06.005
|
|
Hu, L. S., Xu, Y. J., Du, Y. S., et al., 2014. Geochemical Characteristics and Its Geological Significance of the Late Paleozoic Siliceous Rocks in Qinfang Trough, Southeastern Guangxi. Journal of Palaeogeography (Chinese Edition), 16(1): 77-87 (in Chinese with English abstract).
|
|
Jian, P., Liu, D. Y., Kröner, A., et al., 2009. Devonian to Permian Plate Tectonic Cycle of the Paleo-Tethys Orogen in Southwest China (II): Insights from Zircon Ages of Ophiolites, Arc/Back-Arc Assemblages and Within-Plate Igneous Rocks and Generation of the Emeishan CFB Province. Lithos, 113(3-4): 767-784. https://doi.org/10.1016/j.lithos.2009.04.006
|
|
Jiao, S. J., Li, X. H., Huang, H. Q., et al., 2015. Metasedimentary Melting in the Formation of Charnockite: Petrological and Zircon U-Pb-Hf-O Isotope Evidence from the Darongshan S-Type Granitic Complex in Southern China. Lithos, 239: 217-233. https://doi.org/10.1016/j.lithos.2015.10.004
|
|
Jin, X. B., Wang, L., Xiang, H., et al., 2017.Petrogenesis of Diabase from Jiangshiqiao in Taojiang City, Hu’nan Province: Constrains from Geochemistry, Geochronology and Sr-Nd-Pb Isotopes. Geological Bulletin of China, 36(5): 750-760 (in Chinese with English abstract).
|
|
Li, Y. J., Wei, J. H., Santosh, M., et al., 2016. Geochronology and Petrogenesis of Middle Permian S-Type Granitoid in Southeastern Guangxi Province, South China: Implications for Closure of the Eastern Paleo-Tethys. Tectonophysics, 682: 1-16. https://doi.org/10.1016/j.tecto.2016.05.048
|
|
Li, Z. L., Liu, X. J., Xiao, W. J., et al., 2019. Geochronology, Geochemistry and Hf Isotopes of Volcanic Rocks in Pingxiang Area, Southwest Guangxi: Implications for the Latest Stage of Paleo-Tethyan Ocean Northward Subduction. Journal of Geomechanics, 25(5): 932-946 (in Chinese with English abstract).
|
|
Liu, C., Deng, J. F., Liu, J. L., et al., 2011. Characteristics of Volcanic Rocks from Late Permian to Early Traissic in Ailaoshan Tectono-Magmatic Belt and Implications for Tectonic Settings. Acta Petrologica Sinica, 27(12): 3590-3602 (in Chinese with English abstract).
|
|
Liu, D. M., Kang, Z. Q., Yang, F., et al., 2021. Geochronology and Geochemistry of Early Mesozoic Rhyolite in Southwestern Guangxi and Its Geological Significance. Geoscience, 35(4): 981-996 (in Chinese with English abstract).
|
|
Liu, Y., Li, T. D., Xiao, Q. H., et al., 2012. Formation Epoch and Origin of the Yizhang Andesite, Diabase and Granite-Porphyry in Yizhang County, Southern Hu’nan Province: Zircon U-Pb Age and Hf Isotopes. Geological Bulletin of China, 31(9): 1363-1378 (in Chinese with English abstract).
|
|
Lü, F., Xin, Y. J., Li, J. H., et al., 2023. Permian-Triassic Tectonic Evolution of Hainan Island: Constraints from Geochronology and Geochemistry of Magmatic and Metamorphic Rocks. Acta Geologica Sinica, 97(1): 30-51 (in Chinese with English abstract).
|
|
Meng, L. X., Zhou, Y., Cai, Y. F., et al., 2020. Southwestern Boundary between the Yangtze and Cathaysia Blocks: Evidence from Detrital Zircon U-Pb Ages of Early Paleozoic Sedimentary Rocks from Qinzhou-Fangchenggang Area, Guangxi. Earth Science, 45(4): 1227-1242 (in Chinese with English abstract).
|
|
Pearce, J. A., Harris, N. B. W., Tindle, A. G., 1984. Trace Element Discrimination Diagrams for the Tectonic Interpretation of Granitic Rocks. Journal of Petrology, 25(4): 956-983. https://doi.org/10.1093/petrology/25.4.956
|
|
Qin, X. F., Wang, Z. Q., Cao, J., et al., 2013. Petrogenesis of Early Indosinian Granites from the Southwestern Segment of Qinfang Tectonic Belt, Southern Guangxi: Constraints from Zircon U-Pb Chronology and Geochemistry. Journal of Jilin University (Earth Science Edition), 43(5): 1471-1488 (in Chinese with English abstract).
|
|
Shu, L. S., Faure, M., Wang, B., et al., 2008. Late Palaeozoic-Early Mesozoic Geological Features of South China: Response to the Indosinian Collision Events in Southeast Asia. Comptes Rendus Geoscience, 340(2): 151-165. https://doi.org/10.1016/j.crte.2007.10.010
|
|
Sun, S. S., McDonough, W. F., 1989. Chemical and Isotopic Systematics of Oceanic Basalts: Implications for Mantle Composition and Processes. Geological Society, London, Special Publications, 42(1): 313-345. https://doi.org/10.1144/gsl.sp.1989.042.01.19
|
|
Sylvester, P. J., 1998. Post-Collisional Strongly Peraluminous Granites. Lithos, 45(1-4): 29-44. https://doi.org/10.1016/S0024-4937(98)00024-3
|
|
Tian, M. Y., 2021. Petrological Assmblage and Geological Implications of the Indosinian Igneous Rocks in Southeastern Guangxi Province (Dissertation). China University of Geosciences, Beijing (in Chinese with English abstract).
|
|
Tian, Y., Huang, S. F., Wang, L. Z., et al., 2021. Newly Identified Caledonian Gabbro (450 Ma) in the Eastern Guangxi, South China: Production of Intraplate Orogenic Process. China Geology, 4(2): 367-370. http://chinageology.cgs.cn/article/doi/10.31035/cg2021007
|
|
Wang, B. D., Wang, L. Q., Chen, J. L., et al., 2014. Triassic Three-Stage Collision in the Paleo-Tethys: Constraints from Magmatism in the Jiangda-Deqen-Weixi Continental Margin Arc, SW China. Gondwana Research, 26(2): 475-491. https://doi.org/10.1016/j.gr.2013.07.023
|
|
Wang, X. D., Sun, C. M., Jia, X. H., et al., 2023. Geochronology, Geochemistry, and Petrogenesis of the Mashan Basalt in Southeast Guangxi Province: Constraints on the Indosinian Tectonic Setting of South China. Geology in China, 50(2): 573-585 (in Chinese with English abstract).
|
|
Wang, Y. J., Wu, C. M., Zhang, A. M., et al., 2012. Kwangsian and Indosinian Reworking of the Eastern South China Block: Constraints on Zircon U-Pb Geochronology and Metamorphism of Amphibolites and Granulites. Lithos, 150: 227-242. https://doi.org/10.1016/j.lithos.2012.04.022
|
|
Wang, Y. J., Fan, W. M., Liang, X. Q., et al., 2005. SHRIMP Zircon U-Pb Ages and Their Genetic Implications of Indosinian Granites in Hunan. Chinese Science Bulletin, 50(12): 1259-1266 (in Chinese).
|
|
Wang, Y. J., Luo, H., Kuang, G. D., et al., 1998. Late devonian-Late Permian Strata of Cherty Facies at Xiaodong and Bancheng Counties of the Qinzhou Area, Se Guangxi. Acta Micropalaeontologica Sinica, 15(4): 351-366 (in Chinese with English abstract).
|
|
Wedepohl, K. H., 1995. The Composition of the Continental Crust. Geochimica et Cosmochimica Acta, 59(7): 1217-1232. https://doi.org/10.1016/0016-7037(95)00038-2
|
|
Xu, W. C., Luo, B. J., Xu, Y. J., et al., 2018. Geochronology, Geochemistry, and Petrogenesis of Late Permian to Early Triassic Mafic Rocks from Darongshan, South China: Implications for Ultrahigh-Temperature Metamorphism and S-Type Granite Generation. Lithos, 308-309: 168-180. https://doi.org/10.1016/j.lithos.2018.03.004
|
|
Xu, X. S., Yin, F. G., Wan, F., et al., 2001.The Migration of the Qinzhou-Fangcheng Trough in Guangxi and Associated Sedimentary-Tectonic Transform Surfaces. Sedimentary Geology and Tethyan Geology, 21(4): 1-10 (in Chinese with English abstract).
|
|
Yu, Z. Z., Shi, Y. S., Guo, L. Z., 1989. The Paleocontourite and Its Tectonic Significance in Qinzhou Basin, Guangxi, China. Acta Sedimentologica Sinica, 7(3): 21-29 (in Chinese with English abstract).
|
|
Zhang, Q., Lu, J. J., Zhang, R. Q., et al., 2023. Early Paleozoic Tin Mineralization in South China: Geology, Geochronology and Geochemistry of the Lijia Tin Deposit in the Miaoershan-Yuechengling Composite Batholith. Ore Geology Reviews, 152: 105249. https://doi.org/10.1016/j.oregeorev.2022.105249
|
|
Zhang, Y. Y., Zhang, D., Chen, X. H., et al., 2021.U-Pb Chronology, Lithogeochemistry and Tectonic Significance of Late Permain Granite Porphyry in Zhenyuan Gold Deposit, the Middle Section of Ailaoshan. Acta Petrologica Sinica, 37(6): 1674-1690 (in Chinese with English abstract).
|
|
Zhang, Z. C., Luo, W. J., 2011. Advances in Petrology, Geochemistry and Geochronology of Cenozoic Volcanic Rocks in China. Bulletin of Mineralogy, Petrology and Geochemistry, 30(4): 353-360 (in Chinese with English abstract).
|
|
Zhou, Y., Yan, Y., Liu, H. L., et al., 2020. U-Pb Isotope Geochronology of Syntectonic Granites from Hainan Island, South China: Constraints on Tectonic Evolution of the Eastern Paleo-Tethys Ocean. Journal of Ocean University of China, 19(6): 1315-1330. https://doi.org/10.1007/s11802-020-4352-1
|
|
Zhou, Y., Zhao, Y.S., Cai, Y.F., et al., 2023. Permian-Triassic Magmatism in the Qin-Fang Tectonic Belt, SW China: New Insights into Tectonic Evolution of the Eastern Palaeo-Tethys. Journal of Earth Science, 34(6): 1704-1716. https://doi.org/10.1007/s12583-020-1111-6
|
|
Zi, J. W., Cawood, P. A., Fan, W. M., et al., 2013. Late Permian-Triassic Magmatic Evolution in the Jinshajiang Orogenic Belt, SW China and Implications for Orogenic Processes Following Closure of the Paleo-Tethys. American Journal of Science, 313(2): 81-112. https://doi.org/10.2475/02.2013.02
|
感谢桂林理工大学陈丛敏、刘波、焦显杨和解宇航对野外工作的帮助，感谢审稿专家以及编辑部老师对本文提出的宝贵意见和建议！
/
| 〈 |
|
〉 |
AI Summary
