Emplacement age of the Tahe granite and its constraints on the tectonic nature of the Ergun block in the northern part of the Da Hinggan Range
Tóm tắt
Large-scale granitic plutons are exposed in the Ergun block in the northern part of the Da Hinggan Range, but their emplacement age and petrogenesis remain unknown. Of these plutons, the Tahe pluton is composed mainly of porphyritic syenogranite and monzogranite, with minor hornblende alkali feldspar granite and gabbro, which have affinities to post-orogenic granitoids. Laser-ablation Inductively Coupled Plasma Mass-spectroscope (LA-ICP-MS) analysis shows that the major rock types of the Tahe pluton formed at 494 - 480 Ma ago, indicating its emplacement in the Early Paleozoic. It is concluded, therefore, that the collision between the Ergun and the Xing'an blocks ended in Early Paleozoic. Considering the geochronological data of the plutons in the adjacent areas, the Early Paleozoic evolutionary history of the Ergun block is similar to the central Mongolia and the Tuvino blocks in Mongolia, and the Ergun block should be a part of the accretionary continental margin in the southern Siberian Craton.
Tài liệu tham khảo
Ye, H. W., Zhang, X. Z., Zhu, Y. W., Lithospheric framework and evolution of the Manzhouli-Suifenhe geoscience transect based on the characteristics of blue-schist and ophiolite, in M-SGT Geologic Subject Group, Geological Study on the Lithospheric Framework and Evolution of the Manzhouli-Suifenhe Geoscience Transect, China (in Chinese), Beijing: Seismic Press, 1994, 73–83.
Wu, F. Y., Sun, D. Y., Li, H. M. et al., Zircon U-Pb ages of the basement rocks beneath the Songliao Basin, NE China, Chin. Sci. Bull., 2000, 45(n16): 1514–1518.
Wu, F. Y., Sun, D. Y., Li, H. M. et al., The nature of basement beneath the Songliao Basin in NE China: Geochemical and isotopic constraints, Phys. Chem. Earth (A), 2001, 26(n9–10): 793–803.
Shi, G. H., Liu, D. Y., Zhang, F. Q. et al., SHRIMP U-Pb zircon geochronology and its implications on the Xilin Gol Complex, Inner Mongolia, China, Chin. Sci. Bull., 2003, 48(n24): 2742–2748.
Miao, L. C., Fan, W. M., Zhang, F. Q. et al., Zircon SHRIMP geochronology of the Xinkailing-Kele complex in the northwestern Lessor Xing'an Range and its geological implications, Chin. Sci. Bull., 2004, 49(n2): 201–209.
Sun, D. Y., Wu, F. Y., Li, H. M. et al., Emplacement age of the postorogenic A-type granites in northwestern Lesser Xing'an Ranges, and its relationship to the eastward extension of Suolunshan-Hegenshan-Zhalaite collisional suture zone, Chin. Sci. Bull., 2001, 46(n5): 427–432.
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(n1–2): 157–182.
Nozaka, T., Liu, Y., Petrology of the Hegenshan ophiolite and its implication for the tectonic evolution of northern China, Earth Planet. Sci. Lett., 2002, 202(n1): 89–104.
Zhou, M. F., Zhang, H. F., Robinson, P. T., Comments on “Petrology of the Hegenshan ophiolite and its implication for the tectonic evolution of northern China” by T. Nozaka and Y. Liu, Earth Planet. Sci. Lett., 2003, 217(n1–2): 207–210.
Shi, G. H., Miao, L. C., Zhang, F. Q. et al., Emplacement age and tectonic implications of the Xilinhot A-type granite in Inner Mongolia, China, Chin. Sci. Bull., 2004, 49(n7): 723–729.
Li, J. Y., Some new ideas on tectonics of NE China and its neighboring areas, Geol. Rev. (in Chinese), 1998, 44(n4): 339–347.
Li, J. Y., Mo, S. G., He, Z. J. et al., The timing of crustal sinistral strike-slip movement in the northern Great Khing'n Range and its constraint on reconstruction of the crustal tectonic evolution of NE China and adjacent areas since the Mesozoic, Earth Sci. Frontiers (in Chinese), 2004, 11(n3): 157–168.
Biao, S. H., Li, Y. C., He, X. H. et al., The geochemical characteristics of the Xinghuadukou Group in the Lulin forestry center, Tahe, Heilongjiang Province, Regional Geol. China (in Chinese), 1999, 18(n1): 28–33.
Sun, G. R., Li, Y. C., Zhang, Y., The basement tectonics of Ergun massif, Geol. Res. (in Chinese), 2002, 11(n3): 129–139.
Li, R. S., Xinlin ophiolite, Heilongjiang Geol. (in Chinese), 1991, 2(n1): 129–139.
Zhou, C. Y., Ge, W. C., Wu, F. Y. et al., Petrological characteristics and tectonic implications of the Tahe gabbro in the northern part of the Great Xing'an Range, J. Jilin Uni. (Earth Sci.) (in Chinese), 2005, 35(n2): 143–149.
Yuan, H. L., Wu, F. Y., Gao, S. et al., Determination of U-Pb age and rare earth element concentrations of zircons from Cenozoic intrusions in northeastern China by laser ablation ICP-MS. Chin, Sci. Bull., 2003, 48(n22): 2411–2421.
Song, B., Zhang, Y. H., Wan, Y. S. et al., Mount making and procedure of SHRIMP dating, Geol. Rev. (in Chinese), 2002, 48(Supp.): 26–30.
Andersen, T., Correction of common lead in U-Pb analyses that do not report204Pb, Chem. Geol., 2002, 192(n1–2): 59–79.
Heilongjiang Bureau of Geology and Mineral Resources, Regional Geology of Heilongjiang Province (in Chinese), Beijing: Geol. Pub. House, 1993, 734.
Wu, G., Sun, F. Y., Zhao, C. S. et al., Discovery of Early Paleozoic Post Orogenic Granite at the Northern Edge of the Ergun Block and its significance, Chin. Sci. Bull. (in Chinese), 2005, in press.
Sorokin, A. A., Kudryashov, N. M., Li, J. Y. et al., Early Paleozoic granitoids in the Eastern Margin of the Argun’ Terrane, Amur area: first geochemical and geochronologic data, Petrology, 2004, 12(n4): 367–376.
Badarch, G., Cunningham, W. D., Windley, B. F., A new terrane subdivision for Mongolia: implications for the Phanerozoic crustal growth of Central Asia, J. Asian Earth Sci., 2002, 21(n1): 87–110.
Salnikova, E. B., Kozakov, I. K., Kotov, A. B. et al., Age of Palaeozoic granites and metamorphism in the Tuvino-Mongolian Massif of the Central Asian Mobile Belt: loss of a Precambrian microcontinent, Precambrian Res., 2001, 110(n1–4): 143–164.
Salnikova, E. B., Sergeev, S. A., Kotov, A. B. et al., U-Pb zircon dating of granulite metamorphism in the Sludyanskiy Complex, eastern Siberia, Gondwana Res., 1998, 1(n2): 195–205.
Bonin, B., Azzouni-Sekkal, A., Bussy, F. et al., Alkali-calcic and alkaline post-orogenic (PO) granite magmatism: petrologic constraints and geodynamic settings, Lithos, 1998, 45(n1–4): 45–70.
Liegeois, J. P., Some words on the post-collisional magmatism, Lithos, 1998, 45(n1–4): XV–XI.
England, C., Houseman, G. A., Extension during continental convergence with application to the Tibetan plateau, J. Geophys. Res., 1989, 94(n12): 17561–17579.
Wu, F. Y., Sun, D. Y., Li, H. M. et al., A-type granites in northeastern China: Age and geochemical constraints on their petrogenesis, Chem. Geol., 2002, 187(n1–2): 143–173.
Robinson, P. T., Zhou, M. F., Hu, X. F. et al., Geochemical constraints on the petrogenesis and tectonic setting of the Hegenshan ophiolite, Northern China, J. Asian Earth Sci., 1999, 17(n4): 423–442.