Abstract
The Yaojiazhuang ultramafic-syenitic complex is one of the representative Triassic alkaline plutons on the northern margin of the North China Craton (NCC). Based on detailed study of the zircon U-Pb age, petrological, mineralogical, and geochemical data of the complex, the characteristics of the magmas system, the petrogenesis of different rock types, and the nature of the mantle source were discussed to provide new constraints on the origin and tectonic setting of the Triassic alkaline belt. Cumulus ultramafic rocks, clinopyroxene-syenites and syenites are the main rock types of the complex. The zircons from the syenites yielded a U-Pb age of 209 Ma. Diopside-augite, biotite, and sanidine-orthoclase are the major minerals, with subordinate apatite and magnetite. Rocks from the complex are enriched in large ion lithophile elements (LILE) and light rare earth elements (LREE), depleted in high field strength elements (HFSE) and heavy rare earth elements (HREE), and the initial 87Sr/86Sr ranges from 0.7057 to 0.7061 and ɛ Nd(t) from −9.4 to −11.4. Mineralogy and geochemical data demonstrate that the parent magma of the complex is SiO2-undersaturated ultrapotassic alkaline-peralkaline, and is characterized by high CaO content and fluid compositions (P2O5, CO2, H2O), and by high oxygen fugacity and high temperature. The complex was originated from a phlogopite-clinopyroxenite-rich lithospheric mantle source in the garnet-stable area (> 80 km) that had previously been metasomatized by melts/fluids from altered oceanic crust. The parent magma has been contaminated by little ancient TTG gneisses during magma emplacement. The development of the Yaojiazhuang complex indicates that the northern margin of the NCC has entered into an extensively extensional regime in the Late Triassic.
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References
Jahn B M, Auvray B, Cornichet J, et al. 3.5 Ga old amphibolites from eastern Hebei province, China: Field occurrence, petrology, Sm-Nd isochron age and REE geochemistry. Precambrian Res, 1987, 34: 311–346
Zhao G, Sun M, Wilde S A, et al. Late Archean to Paleoproterozoic evolution of the North China Craton: Key issues revisited. Precambrian Res, 2005, 136: 177–202
Wilde S A, Cawood P A, Wang K, et al. Granitoid evolution in the late Archean Wutai complex, North China Craton. J Asian Earth Sci, 2005, 24: 597–613
Zhai M G. Tectonic evolution and metallogenesis of North China Craton (in Chinese). Mineral Deposits, 2010, 29: 24–36
Zhang S H, Zhao Y, Kröner A, et al. Early Permian plutons from the northern North China Block: Constraints on continental arc evolution and convergent margin magmatism related to the Central Asian Orogenic Belt. Int J Earth Sci, 2009, 98: 1441–1467
Zhang S H, Zhao Y, Song B, et al. Petrogenesis of the middle Devonian Gushan diorite pluton on the northern margin of the North China block and its tectonic implications. Geol Mag, 2007, 144: 553–568
Zhang S H, Zhao Y, Song B, et al. Carboniferous granitic plutons from the northern margin of the North China block: Implications for a late Paleozoic active continental margin. J Geol Soc Lond, 2007, 164: 451–463
Chen B, Jahn B M, Tian W. Evolution of the Solonker suture zone: Constraints from zircon U-Pb ages, Hf isotopic ratios and whole-rock Nd-Sr isotopic compositions of subduction- and collision-related magmas and forearc sediments. J Asian Earth Sci, 2009, 34: 245–257
Chen B, Jahn B M, Wilde S, et al. Two contrasting Paleozoic magmatic belts in northern Inner Mongolia, China: Petrogenesis and tectonic implications. Tectonophysics, 2000, 328: 157–182
Yan G H, Mu B L, Xu B L, et al. Triassic alkaline intrusions in the Yanliao-Yinshan area: Their chronology, Sr, Nd and Pb isotopic characteristics and their implications. Sci China Ser D-Earth Sci, 1999, 42: 582–587
Mu B L, Yan G H. Geochemistry of Triassic alkaline or subalkaline igneous complexes in the Yan-Liao area and their significance (in Chinese). Acta Geol Sin, 1992, 66: 108–121
Yan G H, Guo L Z, Wang F Z, et al. Petrographic characteristics of the Yaojiazhuang circular potassic sub-alkaline igneous complex, Yangyan, Hebei (in Chinese). Petrol Res, 1985, 6: 121–133
Williams I S. U-Th-Pb geochronology by ion microprobe. In: McKibben M A, Shanks W C, Ridley W I, eds. Applicationof Microanalytical Techniques to Understanding Mineralizing Processes. Rev Economic Geol, 1998, 7: 1–35
Ludwig K R. ISOPLOT 3.0: A Geochronological Toolkit for Microsoft Excel. Berkeley Geochronology Center, Special Publication, 2003, No. 4: 1–71
Morimoto N, Nomenclature of pyroxene. Mineral Mag, 1988, 52: 535–550
Deer W A, Howie R, Zussman J. Introduction to the Rock-forming Minerals. New Jersey: Prentice Hall, 1992. 712
Boynton W V. Geochemistry of the earth elements: Meteorite studies. In: Henderson P, ed. Rare Earth Element Geochemistry. New York: Elsevier, 1984. 63–114
Sun S S, McDonough W F. Chemical and isotopic systematics of oceanic basalts: Implications for mantle composition and processes. In: Saunders A D, Norry M J, eds. Magmatism in the Ocean Basins. Geol Soc London Spec Pub, 1989, 42: 313–345
Foley S F, Venturelli G, Green D H, et al. The ultrapotassic rocks: Characteristics, classification, and constrains for petrogenenetic models. Earth-Sci Rev, 1987, 24: 81–134
Frey F A, Prinz M. Ultramafic inclusions from San Carlos, Arizona: Petrologic and geochemical data bearing on their petrogenesis. Earth Planet Sci Lett, 1978, 38: 129–176
Chen B, Suzuki K, Tian W, et al. Geochemistry and Os-Nd-Sr isotopes of the Gaositai Alaskan-type ultramafic complex from the northern North China craton: Implications for mantle-crust interaction. Contrib Mineral Petrol, 2009, 158: 683–702
Chen B, Tian W, Liu A K. Petrogenesis of Xiaozhangjiakou mafic-ultramafic complex, North Hebei: Constraints from petrological, geochemical and Nd-Sr isotopic Data (in Chinese). Geol J China Univ, 2008, 14: 295–303
Rudnick R L, Gao S. Composition of the continental crust. In: Holland H D, Turekian K K, eds. Treatise on Geochemistry. Oxford: Elsevier-Pergamon, 2003. 3: 1–64
Duggen S, Hoernle K, Bogaard P V D, et al. Post-collisional transition from subduction to intraplate-type magmatism in the westernmost Mediterranean: Evidence for continental-edge delamination of subcontinental lithosphere. J Petrol, 2005, 46: 1155–1201
Fujimaki H, Tatsumoto M, Aoki K. Partition coefficients of Hf, Zr and REE between phenocrysts and groundmasses. Proceedings of the fourteenth lunar and planetary science conference, Part 2. J Geophys Res, 1984, 89: B662–B672.
Xiao W J, Windley B F, Hao J, et al. Accretion leading to collision and the Permian Solonker suture, Inner Mongolia, China: Termination of the Central Asian Orogenic Belt. Tectonics, 2003, 22: 1609.
Sengör A M C, Natal’in B A. Paleotectonics of Asia: Fragments of a synthesis. In: Yin A, Harrison T M, eds. The Tectonic Evolution of Asia. Cambridge: Cambridge University Press, 1996. 486–641
Shi Y R, Liu D Y, Zhang Q, et al. SHRIMP dating of diorites and granites in Southern Sonidzuqi, Inner Mongolia (in Chinese). Acta Geol Sin, 2004, 78: 789–799
Shi Y R, Liu D Y, Jian P, et al. Zircon SHRIMP dating of K-rich granites in Sonidzuqi, central Inner Mongolia. Geol Bull China, 2005, 25: 424–428
Jian P, Liu D Y, Kröner A, et al. Time scale of the early to mid-Paleozoic orogenic cycle of the longlived Central Asian Orogenic Belt, Inner Mongolia of China: Implications for continental growth. Lithos, 2008, 101: 233–259
Zhang S H, Zhao Y, Song B, et al. Zircon SHRIMP U-Pb and in-situ Lu-Hf isotope analyses of a tuff from Western Beijing: Evidence for missing Late Paleozoic arc volcano eruptions at the northern margin of the North China block. Gondwana Res, 2007, 12: 157–165
Ma X, Chen B, Niu X L. Genesis of the Late Paleozoic Dongwanzi pluton, eastern Hebei (in Chinese). Acta Petrol Sin, 2009, 25: 1975–1988
Ma X, Chen B, Chen J F, et al. Zircon SHRIMP U-Pb age, geochemical, Sr-Nd isotopic and in-situ Hf isotopic data of the Late Carboniferous-Early Permian plutons in the northern margin of the North China Craton. Sci China Ser D-Earth Sci, 2013, 56: 126–144
Mu B L, Jiang P M, Zeng Y S, et al. The Fanshan Igneous Complex and Apatite-magnetite Deposit in Hebei Province China (in Chinese). Beijing: Peking University Press, 1988
Niu X L, Chen B, Ma X. Clinopyroxenes from the Fanshan pluton (in Chinese). Acta Petrol Sin, 2009, 25: 359–373
Shao J A, Zhang Y B, Zhang L Q, et al. Early Mesozoic dike swarms of carbonatites and lamprophyres in Datong area (in Chinese). Acta Petrol Sin, 2003, 19: 93–104
Ren K X, Yan G H, Mu B L, et al. Geochemical characteristics and geological implications of the Hekanzi alkaline complex in Lingyuan County, western Liaoning Province (in Chinese). Acta Petrol Mineral, 2004, 23: 193–202
Feldstein S N, Lange R A. Pliocene potassic magmas from the Kings River Region, Sierra Nevada, California: Evidence for melting of a subduction modified mantle. J Petrol, 1999, 40: 1301–1320
Conticelli S, Guarnieri L, Farinelli A, et al. Trace elements and Sr-Nd-Pb isotopes of K-rich, shoshonitic, and calc-alkaline magmatism of the Western Mediterranean Region: Genesis of ultrapotassic to calc-alkaline magmatic associations in a post-collisional geodynamic setting. Lithos, 2009, 107: 68–92
Avanzinelli R, Lustrino M, Mattei M, et al. Potassic and ultrapotassic magmatism in the circum-Tyrrhenian region: Significance of carbonated pelitic vs. pelitic sediment recycling at destructive plate margins. Lithos, 2009, 113: 213–217
Zhao Z, Mo X, Dilek Y, et al. Geochemical and Sr-Nd-Pb-O isotopic compositions of the post-collisional ultrapotassic magmatism in SW Tibet: Petrogenesis and implications for India intra-continental subduction beneath southern Tibet. Lithos, 2009, 113: 190–212
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Chen, B., Niu, X., Wang, Z. et al. Geochronology, petrology, and geochemistry of the Yaojiazhuang ultramafic-syenitic complex from the North China Craton. Sci. China Earth Sci. 56, 1294–1307 (2013). https://doi.org/10.1007/s11430-013-4603-8
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DOI: https://doi.org/10.1007/s11430-013-4603-8