%0 Journal Article
%T Magmatic sequence of Early Palaeozoic granitic intrusions and its tectonic implications in north Altay orogen, Xinjiang<br>新疆北阿尔泰造山带早古生代花岗岩类侵入序列及其构造意义
%A DONG LianHui
%A QU Xun
%A ZHAO TongYang
%A XU ShiQi
%A ZHOU RuHong
%A WANG KeZhuo
%A ZHU ZhiXin
%A <br>董连慧
%A 屈迅
%A 赵同阳
%A 徐仕琪
%A 周汝洪
%A 王克卓
%A 朱志新
%J 岩石学报
%D 2012
%I 
%X The Early Paleozoic intrusive rocks occupy 50% proportion of whole north Altay orogenic belt in Xinjiang. Based on a large number of high precision SHRIMP and LA-ICP-MS U-Pb zircon geochronology data in recent years, we have identified the Ordovician sequence before the collision and Silurian to Early Devonian sequence after collision in the orogenic belt. The former was composed of tonalite/oligoclase granite and granodiorite-monzonitic granite series, which belongs to the TTG combination, with isotopic age peak between 450Ma and 465Ma. The latter was composed of monzonitic granite-syenogranite and a small amount of alkali feldspar granite, belonging to the generalized GG combination, with isotopic age peak between 390Ma and 415Ma. The former was mainly distributed in the south, the latter mainly distributed in the northern, showing that subduction zone was distributed in the south. According to the same isotopic ages, authors suggest that the both Armantai ophiolite belt on the south side and Altay magma belt on the north constitute ridge subduction system. The south Altay Late Paleozoic accretionary zones, the Erqisi deformation belt, north Junggar Late Paleozoic intra-oceanic arc belt are later on laminated products.
%K Granite
%K TTG combination
%K Ridge subduction
%K Early Paleozoic
%K Altay
%K Xinjiang<br>花岗岩
%K TTG组合
%K 洋脊俯冲
%K 早古生代
%K 阿尔泰
%K 新疆
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=621CF755B1A341E5&jid=2013B5467E3054B1614CEC199353FCED&aid=B5A93E035C82D3EF87FAB16F8AEF3499&yid=99E9153A83D4CB11&vid=D3E34374A0D77D7F&iid=5D311CA918CA9A03&sid=AA3F137B8886F769&eid=52F119C047AB1C71&journal_id=1000-0569&journal_name=岩石学报&referenced_num=0&reference_num=35