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Geoscience ›› 2011, Vol. 25 ›› Issue (5): 965-974.

• structural geology • Previous Articles     Next Articles

Main Progresses in the Study of Precambrian Basement of Jiaobei Terrane,Eastern China

 XU  Yang-1, 2 , FENG  Yan-3, LI  Ri-Hui-1, 2   

  1. 1Key Laboratory of Marine Hydrocarbon Resources and Environmental Geology, Ministry of Land and Resources, Qingdao,
    Shandong266071,China; 2Qingdao Institute of Marine Geology, Qingdao, Shandong266071,China;
    3School of Energy Resources,China University of Geosciences,Beijing100083,China
  • Received:2011-05-11 Revised:2011-09-10 Online:2011-10-26 Published:2011-11-03

Abstract:

The Jiaodong terrane located between Yishu fault and WulianYantai fault in eastern Shandong Province, is characterized by an Archean to Paleoproterozoic crystalline basement experienced different degrees of metamorphism traditionally. Its assemblage includes TTG (tonalitictrondhjemiticgranodioritic) gneisses and a little supracrustal rocks(metavolcanite and metasedimentary), which combined to granitegreenstone belts of Jiaodong terrane. The research of lithological, geochemical, geochronological data indicated that its continental crust was chiefly generated in Neoarchean (28-27 Ga), and then it started intracratonic deposit of Paleoproterozoic khondalite after tectonic event at 25 Ga,finally it undergone the metamorphic event at 18 Ga. Different from Sulu orogen,some characteristics of Precambrian basement of Jiaobei terrane are related to North China Craton, and the boundary between them maybe locate along the WulianYantai fault.

Key words: TTG, ultra basicbasic metamorphic rock, Precambrian basement, Jiaobei terrane