%0 Journal Article
%T Characteristics of deep-derived enclave and its zircon LA-ICP-MS U-Pb age of Machangqing complex, Yunnan Province<br>云南马厂箐岩体中深源包体特征及其锆石LA-ICP-MSU-Pb年龄
%A GUO XiaoDong
%A GE LiangSheng
%A WANG Liang
%A WANG ZhiHua
%A SHI XiaoCui
%A <br>郭晓东
%A 葛良胜
%A 王梁
%A 王治华
%A 史小翠
%J 岩石学报
%D 2012
%I 
%X Machangqing complex is an important part of alkali-rich porphyry belt in western Yunnan. The deep-derived mafic enclaves that found in Machangqing complex are significant for studying the origin and evolution of alkali-rich porphyry, ore-forming process, and regional geodynamics. According to the geological features of the enclaves, the author analyzed the zircons from enclaves with the LA-ICP-MS and obtained a U-Pb weighted average age of 35.13±0.23Ma (MSWD=0.64). This age is consistent with the age of granite porphyry (35.0±0.2Ma) and porphyritic granite (33.78±0.21Ma) which are the host rocks of enclaves. The Th/U value and Ti thermometer tempetature of zircons from enclaves and host rocks suggest that the enclaves are from magma mixing. Studies show the Machangqing alkali-rich porphyry is the mixture of crust-derived and mantle-derived magma enclaves and their host rocks have the similar magma evolution process and the injection of mantle-derived magma is a key factor to the ore-formation of this series magma.
%K Deep-derived enclave
%K Zircon U-Pb Age
%K Mixing of crust and mantle magma
%K Machangqing complex
%K Yunnan Province<br>深源包体
%K 锆石U-Pb年龄
%K 壳-幔岩浆混合
%K 马厂箐岩体
%K 云南
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=621CF755B1A341E5&jid=2013B5467E3054B1614CEC199353FCED&aid=480439D8C603FECAE47792C325A303C4&yid=99E9153A83D4CB11&vid=D3E34374A0D77D7F&iid=94C357A881DFC066&sid=E645E14F118D0796&eid=AFD02B86BFB3C7FC&journal_id=1000-0569&journal_name=岩石学报&referenced_num=0&reference_num=106