%0 Journal Article
%T LA-ICPMS zircon U-Pb ages and geochemistry of Neoproterozoic low-grade metavolcanic rocks in Wuyuan-Dexing area of northeastern Jianxi Province<br>赣东北婺源-德兴地区新元古代浅变质火山岩的地球化学和锆石U-Pb年龄
%A LIU ShuWen
%A YANG PengTao
%A WANG ZongQi
%A LUO Ping
%A WANG YongQing
%A LUO GuoHui
%A WANG Wei
%A GUO BoRan
%A <br>刘树文
%A 杨朋涛
%A 王宗起
%A 罗平
%A 王永庆
%A 罗国辉
%A 王伟
%A 郭博然
%J 岩石学报
%D 2013
%I 
%X Low-grade metamorphosed volcanic rocks consist mainly of metamorphic basalt, dacite and rhyolite in the Wuyuan to Dexing region of the northeastern Jiangxi Province. Whole-rock geochemical analyses reveal that the metabasalt has chemical features of the tholeiite, and the basaltic magma originated from low-degreed partial melting of a spinel lhezolite in disturbed deleted mantle. However, the dacitic magma was derived from a partial melting of a meta-greywacke, and the rhyolite was produced by the fractionation of the dacitic magma. LA-ICP-MS zircon U-Pb isotope dating indicates low-grade meta-dacite from the Wuyuan area was formed at 861±8Ma, and meta-rhyolite and tuffaceous slate from the Dexing area at 860±3Ma and 860±6Ma, respectively, which indicate that these metamorphic volcanic rocks erupted at Neoproterozoic Tonian era. Meanwhile, these samples also preserved some signatures of Neoarchean (2.8~2.5Ga), Middle-Late Paleoproterozoic (2.0~1.7Ga) and Mesoproterozoic (~1.0 Ga) inherited and/or captured zircon ages. Integrated the whole-rock geochemistry, petrogenesis and zircon ages, we suggest that these metamorphic volcanic rocks formed under an Early Neoproterozoic tectonic background of back-arc basin in Andes-type actively continental margin.
%K Low-grade metamorphosed volcanic rocks
%K Whole-rock petrochemistry
%K LA-ICP-MS zircon U-Pb isotope ages
%K Petrogenesis
%K Tectonic background
%K Northeast Jiangxi Province<br>浅变质火山
%K 岩石地球化学
%K LA-ICP-MS锆石U-Pb年龄
%K 岩石成因
%K 构造背景
%K 赣东北地区
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=621CF755B1A341E5&jid=2013B5467E3054B1614CEC199353FCED&aid=423E4EA2B40352F0C976ABD8630F997C&yid=FF7AA908D58E97FA&vid=771469D9D58C34FF&iid=0B39A22176CE99FB&sid=93ADA2AA3F969E58&eid=2EAE52BA5B1222A9&journal_id=1000-0569&journal_name=岩石学报&referenced_num=0&reference_num=47