Timing of Tectonothermal Events in Archean Basement of the North China Craton

被引:0
|
作者
Wan Y. [1 ]
Xie H. [1 ]
Dong C. [1 ]
Liu D. [1 ]
机构
[1] Beijing SHRIMP Center, Institute of Geology, Chinese Academy of Geological Sciences, Beijing
来源
Diqiu Kexue - Zhongguo Dizhi Daxue Xuebao/Earth Science - Journal of China University of Geosciences | 2020年 / 45卷 / 09期
关键词
Archean; Geochronology; Geological evolution; North China Craton; Tectonothermal events;
D O I
10.3799/dqkx.2020.121
中图分类号
学科分类号
摘要
The North China Craton (NCC) has a long-term formation and evolution history up to 3.8 Ga rock records, with 4.0-4.1 Ga zircons. This paper summarizes the Archean tectonothermal events of the Craton, mainly focusing on the timing of the events. The oldest metamorphic zircon ages are 3.71-3.75 Ga and 4.0 Ga identified for detrital or xenocrystic zircons from Paleozoic meta-volcano-sedimentary rock in western segment of the North Qinling Belt near the southern margin of the NCC. Paleoarchean (~3.3 Ga) tectonothermal event widely occurs in the Anshan area, resulting in formation of banded trondhjemite gneisses. Early Neoarchean-late Mesoarchean metamorphic zircon ages can be subdivided into two groups: 2.65-2.85 Ga and ~2.6 Ga. 2.65-2.85 Ga metamorphic zircon ages have been obtained in western Shandong, eastern Shandong and Lushan. It is difficult to determine the exact age of tectonothermal event because of strong overprinting of the late Neoarchean. However, late Mesoarchean to early Neoarchean tectonothermal event must have occurred in the NCC. Compared with the 2.65-2.85 Ga tectonothermal events, the ~2.6 Ga event was more clearly developed in the NCC, such as in eastern Shandong and Lushan, besides being widely identified in western Shandong. 2.6 Ga is a convenient time to set as the early Neoarchean-late Neoarchean boundary. The most important Archean tectonothermal events occurred at the late Neoarchean (2.49-2.53 Ga), which have been identified in every Archean basement area of the NCC. In general, its northern domain recorded higher-grade metamorpism than its southern domain probably due to the former exposuring deeper crustal level. In the NCC, metamorphic intensity and scope became stronger and larger with time going on, peaking at the end of the Noearchean, consistent with the Archean continental crust becoming larger in thickness and scale with time. In some areas where the late Paleoproterozoic tectonothermal event was well developed, some metamorphic zircons recorded the earlest Paleoproterozic and even younger ages (2.40-2.47 Ga). This may not mean the existence of these events, but is a result of strong overprinting of the late Paleoproterozoic events. © 2020, Editorial Department of Earth Science. All right reserved.
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页码:3119 / 3160
页数:41
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共 139 条
  • [61] Liu S. W., Wang M. J., Wan Y. S., Et al., A Reworked ∼3.45 Ga Continental Microblock of the North China Craton: Constraints from Zircon U-Pb-Lu-Hf Isotopic Systematics of the Archean Beitai-Waitoushan Migmatite-Syenogranite Complex, Precambrian Research, 303, pp. 332-354, (2017)
  • [62] Liu S. W., Wang W., Bai X., Et al., Lithological Assemblages of Archean Meta-Igneous Rocks in Eastern Hebei-Western Liaoning Provinces of North China Craton, and Their Geodynamic Implications, Earth Science, 43, 1, pp. 44-56, (2018)
  • [63] Lu S. N., Chen Z. H., Xiang Z. Q., The World Geopark of Taishan: Geochronological Framework of Ancient Intrusives, (2008)
  • [64] Ma M. Z., Dong C. Y., Xu Z. Y., Et al., Anatexis of Early Paleoproterozoic Garnet-Biotite Gneisses (Daqingshan Supracrustal Rocks) in Daqingshan, Inner Mongolia: Geology, Zircon Geochronology and Geochemistry, Acta Petrologica Sinica, 31, 6, pp. 1535-1548, (2015)
  • [65] Ma M. Z., Wan Y. S., Santosh M., Et al., Decoding Multiple Tectonothermal Events in Zircons from Single Rock Samples: SHRIMP Zircon U-Pb Data from the Late Neoarchean Rocks of Daqingshan, North China Craton, Gondwana Research, 22, 3-4, pp. 810-827, (2012)
  • [66] Ma M. Z., Xu Z. Y., Zhang L. C., Et al., SHRIMP Dating and Hf Isotope Analysis of Zircons from the Early Precambrian Basement in the Xi Ulanbulang Area, Wuchuan, Inner Mongolia, Acta Petrologica Sinica, 29, 2, pp. 501-516, (2013)
  • [67] Ma X. D., Fan H. R., Santosh M., Et al., Geochemistry and Zircon U-Pb Chronology of Charnockites in the Yinshan Block, North China Craton: Tectonic Evolution Involving Neoarchaean Ridge Subduction, International Geology Review, 55, 13, pp. 1688-1704, (2013)
  • [68] Ma X. D., Fan H. R., Santosh M., Et al., Origin of Sanukitoid and Hornblendite Enclaves in the Dajitu Pluton from the Yinshan Block, North China Craton: Product of Neoarchaean Ridge Subduction?, International Geology Review, 56, 10, pp. 1197-1212, (2014)
  • [69] Nutman A. P., Bennett V. C., The 3.9-3.6 Ga Itsaq Gneiss Complex of Greenland, Earth's Oldest Rocks, pp. 275-400, (2019)
  • [70] Nutman A. P., Wan Y. S., Du L. L., Et al., Multistage Late Neoarchaean Crustal Evolution of the North China Craton, Eastern Hebei, Precambrian Research, 189, 1-2, pp. 43-65, (2011)