Advanced Search

Indexed by SCI、CA、РЖ、PA、CSA、ZR、etc .

Volume 28 Issue 1
Feb 2017
Turn off MathJax
Article Contents
Yinjuan Ju, Xiaoli Zhang, Shaocong Lai, Jiangfeng Qin. Permian-Triassic highly-fractionated I-type granites from the southwestern Qaidam basin (NW China): Implications for the evolution of the Paleo-Tethys in the Eastern Kunlun orogenic belt. Journal of Earth Science, 2017, 28(1): 51-62. doi: 10.1007/s12583-017-0745-5
Citation: Yinjuan Ju, Xiaoli Zhang, Shaocong Lai, Jiangfeng Qin. Permian-Triassic highly-fractionated I-type granites from the southwestern Qaidam basin (NW China): Implications for the evolution of the Paleo-Tethys in the Eastern Kunlun orogenic belt. Journal of Earth Science, 2017, 28(1): 51-62. doi: 10.1007/s12583-017-0745-5

Permian-Triassic highly-fractionated I-type granites from the southwestern Qaidam basin (NW China): Implications for the evolution of the Paleo-Tethys in the Eastern Kunlun orogenic belt

doi: 10.1007/s12583-017-0745-5
More Information
  • Late Paleozoic to Early Mesozoic granites are widespread in the southern Qaidam Basin, northern margin of the eastern Kunlun orogenic belt. Their petrogenesis can provide us insights into the tectonic evolution and crustal growth process in the Qaidam Basin. This paper reports Permian-Triassic granites from the Kunbei area, southwestern Qaidam Basin. Detailed zircon LA-ICP MS U-Pb dating reveals that the granites from the four drilling cores (q404, q406, q1612-8, q1613-8) have identical ages of 251±3, 256±4, 247±2, and 251±6 Ma, respectively, these ages are identical with the Permian-Triassic granites from the eastern Qaidam Basin. Detailed geochemical analyses indicate that these granites display typical affinities of highly-fractionated I-type granites: (1) they have high SiO2(up to 76.5 wt.%), Na2O+K2O (7.91 wt.% to 9.48 wt.%) contents and high FeOT/MgO values of 4.7 to 9.3, suggesting significant fractional crystallization; (2) their low A/CNK values of 0.54 to 1.03, no normative Al-rich minerals, inconsistent with the per-aluminous S-type granites; (3) their low Ga (14.5 ppm to 20.7 ppm) and 10000×Ga/Al (2.23 to 3.03, most of them < 2.6) values are inconsistent with the A-type granites; (4) the high Rb (191 ppm to 406 ppm) contents and Rb/Sr (2.1 to 13.4) ratios, as well as the significant negative Eu anomalies (0.10 to 0.42) also indicate significant fractional crystallization of feldspars; (5) their low P2O5 contents (0.02 wt.% to 0.10 wt.%) suggest the limited solubility of phosphorus in primitive metaluminous melts. In combination with the geological background, we propose that the Permian-Triassic highly-fractionated I-type granites resulted from partial melting of intra-crustal mafic rocks, and the primitive I-type granitic melts underwent significant fractional crystallization of feldspars. The occurrence of highly-fractionated I-type granites in the southwestern Qaidam Basin suggests a Permian-Triassic active continental margin in the northern margin of the East Kunlun orogenic belt.

     

  • Supplementary materials (Tables S1–S2) are available in the online version of this article at http://dx.doi.org/10.1007/s12583-017-0745-5.
  • loading
  • Andersen, T., 2002. Correction of Common Lead in U-Pb Analyses that do not Report 204Pb. Chemical Geology, 192(1/2): 59-79. doi: 10.1016/s0009-2541(02)00195-x
    Bonin, B., 2007. A-Type Granites and Related Rocks: Evolution of a Concept, Problems and Prospects. Lithos, 97(1/2): 1-29. doi: 10.1016/j.lithos.2006.12.007
    Chappell, B. W., Simpson, P. R., 1984. Source Rocks of I-and S-Type Granites in the Lachlan Fold Belt, Southeastern Australia (and Discussion). Philosophical Transactions of the Royal Society of London, Series A, Mathematical and Physical Sciences, 310: 693-707 doi: 10.1098/rsta.1984.0015
    Chappell, B. W., Bryant, C. J., Wyborn, D., 2012. Peraluminous I-Type Granites. Lithos, 153: 142-153. doi: 10.1016/j.lithos.2012.07.008
    Chen, C. H., Lin, W., Lu, H. Y., et al., 2000. Cretaceous Fractionated I-Type Granitoids and Metaluminous A-Type Granites in SE China: The Late Yanshanian Post-Orogenic Magmatism. Transactions of the Royal Society of Edinburgh: Earth Sciences, 91(1/2): 195-205. doi: 10.1017/s0263593300007379
    Chen, J. J., Fu, L. B., Wei, J. H., et al., 2016. Geochemical Characteristics of Late Ordovician Granodiorite in Gouli Area, Eastern Kunlun Orogenic Belt, Qinghai Province: Implications on the Evolution of Proto-Tethys Ocean. Earth Science, 41(11): 1863-1882 (in Chinese with English Abstract)
    Chen, X. H., Yin, A., George, G., et al., 2011. Chemical Geodynamics of Granitic Magmatism in the Basement of the Eastern Qaidam Basin, Northern Qinghai-Tibet Plateau. Acta Geologica Sinica, 85: 157-171 (in Chinese with English Abstract)
    Clemens, J. D., Stevens, G., Farina, F., 2011. The Enigmatic Sources of I-Type Granites: The Peritectic Connexion. Lithos, 126(3/4): 174-181. doi: 10.1016/j.lithos.2011.07.004
    de la Roche, H., Leterrier, J., Grandclaude, P., et al., 1980. A Classification of Volcanic and Plutonic Rocks Using R1R2-Diagram and Major-Element Analyses-Its Relationships with Current Nomenclature. Chemical Geology, 29(1-4): 183-210. doi: 10.1016/0009-2541(80)90020-0
    Deng, J. F., Wu, Z. X., Yang, J. J., 1995. Petrological Structure and Deep Processes in the Crust-Mantle along the Golmu-Ejinaqi Geological Transect. Acta Geophysica Sinica, 38(Suppl. Ⅱ): 130-144 (in Chinese with English Abstract)
    Harris, N. B. W., Pearce, J. A., Tindle, A. G., 1986. Geochemical Characteristics of Collision-Zone Magmatism. Geological Society, London, Special Publications, 19(1): 67-81. doi: 10.1144/gsl.sp.1986.019.01.04
    Hanson, G. N., 1978. The Application of Trace Elements to the Petrogenesis of Igneous Rocks of Granitic Composition. Earth and Planetary Science Letters, 38(1): 26-43. doi:10.1016/0012-821x (78)90124-3
    Li, X. H., Li, Z. X., Li, W. X., et al., 2007. U-Pb Zircon, Geochemical and Sr-Nd-Hf Isotopic Constraints on Age and Origin of Jurassic I-and A-Type Granites from Central Guangdong, SE China: A Major Igneous Event in Response to Foundering of a Subducted Flat-Slab? Lithos, 96(1/2): 186-204. doi: 10.1016/j.lithos.2006.09.018
    Liu, C. D., Mo, X. X., Luo, Z. H., et al., 2004. Mixing Events between the Crust-and Mantle-Derived Magmas in Eastern Kunlun: Evidence from Zircon SHRIMP Ⅱ Chronology. Chinese Science Bulletin, 49(8): 828-834. doi: 10.1007/bf02889756
    Liu, G., Zhang, Y., Xue, J., et al., 2014. Zircon LA-ICP MS U-Pb Dating and Geochemistry of Basement Granites from North Kunlun Faults Zone, Western Qaidam Basin and Their Geological Implications. Acta Petrologica Sinica, 30: 1615-1627 (in Chinese with English Abstract)
    Ludwig, K. R., 2003. ISOPLOT 3.0: A Geochronological Toolkit for Microsoft Excel. Special Publication No. 4, Berkeley Geochronology Center, Berkeley
    Mattern, F., Schneider, W., 2000. Suturing of the Proto-and Paleo-Tethys Oceans in the Western Kunlun (Xinjiang, China). Journal of Asian Earth Sciences, 18(6): 637-650. doi: 10.1016/s1367-9120(00)00011-0
    Metcalfe, I., 2013. Gondwana Dispersion and Asian Accretion: Tectonic and Palaeogeographic Evolution of Eastern Tethys.Journal of Asian Earth Sciences, 66: 1-33. doi: 10.1016/j.jseaes.2012.12.020
    Mo, X. X., Luo, Z. H., Deng, J. F., et al., 2007. Granitoids and Crustal Growth in the East-Kunlun Orogenic Belt. Geological Journal of China Universities, 13: 403-414 (in Chinese with English Abstract)
    Qiu, J. S., Xiao, E., Hu, J., et al., 2008. Petrogenesis of Highly Fractionated I-Type Granites in the Coastal Area of Northeastern Fujian Province: Constraints from Zircon U-Pb Geochronology, Geochemistry and Nd-Hf Isotopes. Acta Petrologica Sinica, 24(11): 2468-2484 (in Chinese with English Abstract)
    Rudnick, R. L., Gao, S., 2003. 3.01-Composition of the Continental Crust A2-Holland, Heinrich D. In: Turekian, K. K., ed., Treatise on Geochemistry. Pergamon, Oxford. 1-64
    Schwab, M., Ratschbacher, L., Siebel, W., et al., 2004. Assembly of the Pamirs: Age and Origin of Magmatic Belts from the Southern Tien Shan to the Southern Pamirs and their Relation to Tibet. Tectonics, 23(4): TC4002. doi: 10.1029/2003tc001583
    Shi, B., Zhu, Y. H., Zhong, Z. Q., et al., 2016. Petrological, Geochemical Characteristics and Geological Significance of the Caledonian Peraluminous Granites in Heihai Region, Eastern Kunlun. Earth Science, 41(1): 35-54 (in Chinese with English Abstract)
    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: 313-345 doi: 10.1144/GSL.SP.1989.042.01.19
    Sylvester, P. J., 1998. Post-Collisional Strongly Peraluminous Granites. Lithos, 45(1-4): 29-44. doi: 10.1016/s0024-4937(98)00024-3
    Tao, J. H., Li, W. X., Li, X. H., et al., 2013. Petrogenesis of Early Yanshanian Highly Evolved Granites in the Longyuanba Area, Southern Jiangxi Province: Evidence from Zircon U-Pb Dating, Hf-O Isotope and Whole-Rock Geochemistry. Science China: Earth Sciences, 56(6): 922-939. doi: 10.1007/s11430-013-4593-6
    Wang, A., Wang, G. C., Zhang, K. X., et al., 2009. Late Neogene Mountain Building of Eastern Kunlun Orogen: Constrained by DEM Analysis. Journal of Earth Science, 20(2): 391-400. doi: 10.1007/s12583-009-0032-1
    Wang, B., Luo, Z., Li, H., et al., 2009. Petrotectonic Assemblages and Temporal-Spatial Framework of the Late Paleozoic-Early Mesozoic Intrusions in the Qimantage Corridor of the East Kunlun belt. Geology in China, 36: 769-782 (in Chinese with English Abstract)
    Watson, E. B., Harrison, T. M., 1983. Zircon Saturation Revisited: Temperature and Composition Effects in a Variety of Crustal Magma Types. Earth and Planetary Science Letters, 64(2): 295-304. doi:10.1016/0012-821x (83)90211-x
    Whalen, J. B., Currie, K. L., Chappell, B. W., 1987. A-Type Granites: Geochemical Characteristics, Discrimination and Petrogenesis. Contributions to Mineralogy and Petrology, 95(4): 407-419. doi: 10.1007/bf00402202
    Wu, F. Y., Sun, D. Y., Li, H. M., et al., 2002. A-Type Granites in Northeastern China: Age and Geochemical Constraints on Their Petrogenesis. Chemical Geology, 187(1/2): 143-173. doi: 10.1016/s0009-2541(02)00018-9
    Wu, F. Y., Jahn, B. M., Wilde, S. A., et al., 2003. Highly Fractionated I-Type Granites in NE China (Ⅱ): Isotopic Geochemistry and Implications for Crustal Growth in the Phanerozoic. Lithos, 67(3/4): 191-204. doi: 10.1016/s0024-4937(03)00015-x
    Xiong, F. H., Ma, C. Q., Jiang, H., et al., 2016. Geochronology and Petrogenesis of Triassic High-K Calc-Alkaline Granodiorites in the East Kunlun Orogen, West China: Juvenile Lower Crustal Melting during Post-Collisional Extension. Journal of Earth Science, 27(3): 474-490. doi: 10.1007/s12583-016-0674-6
    Yang, J. S., Wang, X. B., Shi, R. D., et al., 2004. The Durngoi Ophiolite in East Kunlun, Northern Qinghai-Tibet Plateau: A Fragment of Paleo-Tethyan Oceanic Crust. Chinese Geology, 31(3): 225-239 (in Chinese with English Abstract)
    Yang, J. Z., Liu, X. C., Wu, Y. B., et al., 2015. Zircon Record of Ocean-Continent Subduction Transition Process of Dulan UHPM Belt, North Qaidam. Journal of Earth Science, 26(5): 617-625. doi: 10.1007/s12583-015-0585-0
    Yin, A., Dang, Y. Q., Zhang, M., et al., 2008. Cenozoic Tectonic Evolution of the Qaidam Basin and Its Surrounding Regions (Part 3): Structural Geology, Sedimentation, and Regional Tectonic Reconstruction. Geological Society of America Bulletin, 120(7/8): 847-876. doi: 10.1130/b26232.1
    Yin, A., Harrison, T. M., 2000. Geologic Evolution of the Himalayan-Tibetan Orogen. Annual Review of Earth and Planetary Sciences, 28: 211-280 doi: 10.1146/annurev.earth.28.1.211
    Yuan, H. L., Gao, S., Liu, X. M., et al., 2004. Accurate U-Pb Age and Trace Element Determinations of Zircon by Laser Ablation-Inductively Coupled Plasma-Mass Spectrometry. Geostandards and Geoanalytical Research, 28(3): 353-370. doi: 10.1111/j.1751-908x.2004.tb00755.x
    Zhu, D. C., Mo, X. X., Wang, L. Q., et al., 2009. Petrogenesis of Highly Fractionated I-Type Granites in the Zayu Area of Eastern Gangdese, Tibet: Constraints from Zircon U-Pb Geochronology, Geochemistry and Sr-Nd-Hf Isotopes. Science in China Series D: Earth Sciences, 52(9): 1223-1239. doi: 10.1007/s11430-009-0132-x
  • 加载中

Catalog

    通讯作者: 陈斌, bchen63@163.com
    • 1. 

      沈阳化工大学材料科学与工程学院 沈阳 110142

    1. 本站搜索
    2. 百度学术搜索
    3. 万方数据库搜索
    4. CNKI搜索

    Figures(9)  / Tables(2)

    Article Metrics

    Article views(906) PDF downloads(315) Cited by()
    Proportional views
    Related

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return