%0 Journal Article
%T Zircon U-Pb SHRIMP ages of sub-volcanic bodies related with porphyritic Fe-deposits in the Luzong and Ningwu basins, Middle and Lower Yangtze River Reaches, Central China<br>长江中下游地区庐(江)-枞(阳)和宁(南京)-芜(湖)盆地内与成矿有关潜火山岩体的SHRIMP锆石U-Pb年龄
%A XUE HuaiMin
%A DONG ShuWen
%A MA Fang
%A <br>薛怀民
%A 董树文
%A 马芳
%J 岩石学报
%D 2010
%I 
%X Luzong basin and Ningwu basin, which are two largest basins among several Mesozoic volcanic basins distributed in the Middle and Lower Yangtze River Reaches, developed a suite of unique rock series (shoshonitic series ) and abundant iron- sulfur iron- and nonmetal ore deposits, especially porphyry Fe-deposits. The dominant metallogenic bodies are sub-volcanic rocks formed in second volcanic activity cycle, syenite-porphyry for the Luzong basin and augite diorite porphyrite for Ningwu basin. In this work, we used zircon SHRIMP U-Pb technique accurately dating their emplacement ages of the Bajiatan body and the Jiaochong body in the Luzong basin and the Yinshan body in the Ningwu basin. The results are as follows: The zircon grains from these three bodies yield an emplacement ages of 131.0±1.1Ma, 131.5±1.6Ma and 127.8±1.8Ma respectively. The volcanic-subvolcanic rocks in Luzong basin and Ningwu basin (as well as all Middle and Lower Yangtze River Reaches) formed in very short time, predicate that "suddenly" lithospheric thinning was dominant mechanism of magmatism and cosmically metallogenesis in the reaches.
%K Shoshonite
%K Sub-volcanic rock
%K SHRIMP zircon U-Pb dating
%K Luzong basin
%K Ningwu basin
%K Middle and Lower Yangtze River Reaches<br>橄榄玄粗岩
%K 潜火山岩
%K SHRIMP锆石U-Pb定年
%K 庐-枞盆地
%K 宁-芜盆地
%K 长江中下游地区
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=621CF755B1A341E5&jid=2013B5467E3054B1614CEC199353FCED&aid=E3D616C3F200FEE75DCFBDC108FB3A09&yid=140ECF96957D60B2&vid=96C778EE049EE47D&iid=9CF7A0430CBB2DFD&sid=1B1665F6502C32A4&eid=8ACDF1140B67B9CB&journal_id=1000-0569&journal_name=岩石学报&referenced_num=2&reference_num=44