| Citation: | Zhendong You, Zengqiu Zhong, Shutian Suo, Zeming Zhang, Bize Wei. New Findings in High-Pressure and Ultrahigh-Pressure Metamorphic Belt of Tongbaishan-Dabieshan Regions, Central China. Journal of Earth Science, 2000, 11(3): 228-233.
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The Tongbai-Dabieshan high-pressure (HP) and ultrahigh-pressure (UHP) belt is sandwiched between the Yangtze and the Sinokorean cratons. It connects the Qinling orogenic belt in the west and links toward the east to the Sulu ultrahigh-pressure (UHP) belt. At present there is a consensus that the UHP metamorphic rocks are the products of the oblique collision between the Yangtze and Sinokorean cratons during the Triassic. However, there is still a lot of controversies about the formation and exhumation of the HP-and UHP-metamorphic belts. The present research work on the composition and the structural geometry and kinetics of the HP-and UHP-metamorphic belt has shown the following new results: (1) The overall structural geometry pattern of Dabieshan is similar to the metamorphic core complex developed in the western North America; (2) The discoveries of HP and UHP metamorphic rocks in the north of Dabieshan indicate that the significance of Shuihou-Wuhe fault should be re-evaluated; (3) A series of micro-structural evidence, including the newly-found retrograde granulite facies assemblages in the garnet pyroxenites, substantiate the extensional processes following the collision event; (4) The discovery of partial melting phenomena in the UHP-metamorphic belts illuminates the relationship between the HP-and UHP metamorphic rocks and their associated granite gneiss. All of these new findings will greatly improve our understanding of the formation and exhumation of the high-pressure and ultrahigh pressure metamorphic belts.
| Cong B, Wang Q, 1999. The New Advances in the Study of the Ultra-232 You Zhendong, Zhong Zengqiu, Suo Shutian, Zhang Zeming and Wei Bizehigh Pressure Belt in the Dabieshan and Sulu Regions. Chinese Science Bulletin, 44(11): 27-41 (in Chinese) |
| You Z, Suo S, Zhong Z, et al, 1998. The Extensional Tectonics and Retrometamorphic Processes Subsequent to the High-Pressure and Ultrahigh-Pressure Metamorphic Events in Dabieshan, China. Continental Dynamics, 3(1-2): 63-71 |
| Zhou G, Liu J, Liu Y, 1996. High-Pressure and Ultrahigh Pressure Metamorphic Belts in Northern Hubei Province, China. Wuhan: China University of Geosciences Press. 53-81 (in Chinese) |
| Han Y, Chen Y, 1993. Metamorphism of Glaucophane Greenschist in Dabie Mountains—As Evidenced by Mulan Mountain Blueschist Belt. In: Suo S, ed. The Petrology and Tectonics in Dabie Precambrian Metamorphic Terranes, Central China. Wuhan: China University of Geosciences Press. 212-214 |
| Zhong Z, Suo S, You Z, 1999. Regional Scale Extensional Tectonic Pattern of Ultrahigh-Pressure and High Pressure Metamorphic Belts from the Dabie Massif, China. International Geology Review, 41: 1033-1041 doi: 10.1080/00206819909465188 |
| Suo S, Zhong Z, 1999. Multi-Layered Low-Angle Ductile Detachment System in Dabie-Sulu UHPM and HPM Belts, China. Jof China University of Geosciences, 10(3): 187-193 |
| Davies G H, 1983. Shear Zone Model for the Origin of Metamorphic Core Complexes. Geology, 11: 342-347 |
| Xu S, Su W, Liu Y, et al, 1999. The Discovery of Eclogite and its Petrographic Features in the Northern Part of Dabieshan. Chinese Science Bulletin, 44(13): 1452-1456 (in Chinese) doi: 10.1360/csb1999-44-13-1452 |
| You Z, Zhong Z, Suo S, et al, 2000. A Petrogenetic Study of the Garnet Pyroxenite Enclaves in Raobazhai Spinel Peridotite, North Dabieshan, Anhui, China. Science in China (Ser D) (in press) |
| Ellis D J, Green D H, 1979. An Experimental Study of the Effect of Ca upon Garnet-Clinopyroxene Fe-Mg Exchange Equilibria. Contr Mineral and Petrol, 71: 13-22 doi: 10.1007/BF00371878 |
| Coleman R G, Lee D E, Beatty L B, et al, 1965. Eclogites and Eclogites: Their Differences and Similarities. Geological Society of America Bulletin, 76: 483-508 doi: 10.1130/0016-7606(1965)76[483:EAETDA]2.0.CO;2 |
| You Z, Suo S, Han Y, et al, 1991. The Metamorphic Processes and Tectonic Analyses in the Core Complex of an Orogenic Belt: An Example from the Eastern Qinling Mountains. Wuhan: China University of Geosciences Press. 166-183 |
| Zhou H, Li X, Liu Y, 1997. Geochemical Variation of Cold Eclogites from Hualianting in the South Dabie Mountains during Retrograde Metamorphic Processes. Geochimica, 26(5): 25-33 |
| You Z, Chen N, Zhang Z, 1997. The Metamorphic Evidences for Post Orogenic Uplift of the Tongbai-Dabie Tectonic Belt, Central China. In: Qian X, Rou Z, eds. Proc 30th Int' l Geol Congr Vol. 17, Part Ⅱ. Netherland: VSP. 251-268 |
| Zhang Z, You Z, Han Y, et al., 1995. Petrology, Metamorphic Processes and Petrogenetic Study of the Eclogite Belts in Dabie and Sulu Areas. Acta Geologica Sinica, 69(4): 306-325 |
| Liu J, Wu Y, Guo L, 1997. The Relationships between Eclogites and Their Gneiss Hosts: Implications of the Microinclusions within Accessory Minerals from the Gneiss. Chinese Science Bulletin, 42(23): 2531-2534 (in Chinese) doi: 10.1360/csb1997-42-23-2531 |
| You Z, Zhong Z, Tang Z, et al, 1996. Corrosion-Reaction Margin with Inversion of Polysynthetic Twinning of Plagioclase in Migmatites: An Example from Quartzofeldspathic Gneiss in Dabieshan. Earth Science—J of China University of Geosciences, 21 (5): 511-518 |
| Xu S, Wu W, Su W, et al, 1998. The Metamorphic Granite in the Eclogite Belt of East Dabieshan and Its Geological Significance. Acta Petrologica Sinica, 14(1): 42-59 |
| Zhong Z, Zhang H, Suo S, et al, 1999. Partial Melting Processes during Exhumation of Ultrahigh-Pressure Metamorphic Rocks in Dabieshan, China. Jof China University of Geosciences, 10(3): 194-199 |
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