%0 Journal Article
%T The discovery of podiform chromite in west Liaoning and its implication for plate tectonics<br>辽西豆荚状铬铁矿的发现及其意义
%A LI JiangHai
%A NIU XiangLong
%A CHEN Zheng
%A FENG Jun
%A HUANG XiongNan
%A <br>李江海
%A 牛向龙
%J 岩石学报
%D 2002
%I 
%X The podiform chromite is identified associated with ultramafic blocks within a structural zone , which cut across a Neoarchean metamorphic terrain, west Liaoning. The characteristic structures of podiform chromite are shown by chromite deposits, such as structural layering, rootless folds, lenses, nodular structures, and antinodular structures etc. The geological occurrence and structures of the chromite ores are evidently comparable to the typical podiform chromites of ophiolites. As constrained by relevant isotopic age dating, the podiform chromite was generated about 2. 50Ga. Furthermore, the Neoarchean metamorphic mafic rocks of this area are chemically similar to MORB, and Neoarchean high-pressures are widely reported along the structural belt. It is suggested that the plate subduction and collision were regionally operated in the Neoarchean.
%K Podiform chromite
%K Nodular structure
%K Ultramafic blocks
%K Structural zone
%K Plate tectonics<br>豆荚状铬铁矿
%K 豆状构造
%K 超镁铁岩块
%K 构造带
%K 板块构造
%K 辽宁
%K 蛇绿岩
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=621CF755B1A341E5&jid=2013B5467E3054B1614CEC199353FCED&aid=BEE810D217C51416&yid=C3ACC247184A22C1&vid=13553B2D12F347E8&iid=0B39A22176CE99FB&sid=3E0812ED84A7B31D&eid=315348DC4A789ECBFDF7AF0D8618B345&journal_id=1000-0569&journal_name=岩石学报&referenced_num=13&reference_num=25