%0 Journal Article
%T K-cymrite in the Sulu UHP eclogites<br>苏鲁超高压榴辉岩中钾长石的超高压相
%A ZENG LingSen
%A CHEN Jing
%A CHEN ZhenYu
%A CHEN FangYuan
%A GAO LiE
%A <br>曾令森
%A 陈晶
%A 陈振宇
%A 陈方远
%A 高利娥
%J 岩石学报
%D 2009
%I 
%X Recent studies have shown that both garnet and omphacite in the Sulu ultrahigh-pressure (UHP) eclogites contain various types of polycrystalline K-feldspar-bearing micro-inclusions. Whether K-feldspar within these inclusions had experienced UHP metamorphic reactions or not is a key question. Answers to this question could not only provide tight constraints on the formation mechanisms for the quartzo-feldspathic inclusions in mafic eclogites, but also help to promote understandings on the physical and chemical behaviors of continental crustal rocks during UHP metamorphism. Eclogite sample B174 was collected from the main borehole of the Chinese Continental Scientific Drilling Project (CCSD). Garnets from this sample contain a number of single-phase and polyphase polycrystalline inclusions including K-feldspar and calcite single-phase inclusions, K-feldspar+quartz and K-feldspar+calcite polycrystalline inclusions. Laser Raman Spectroscopy analyses show that part of the K-feldspar grains within these inclusions contains K-cymrite, a UHP phase of K-feldspar. This result indicates that (1) K-feldspar grains within these inclusions are polymorph after K-cymrite; and (2) K-feldspar-bearing inclusions in the Sulu eclogites formed at UHP conditions.
%K UHP metamorphism
%K Eclogite
%K K-feldspar
%K K-cymrite
%K Polyphase inclusion<br>超高压变质作用
%K 榴辉岩
%K 钾长石
%K 钾质钡铝沸石
%K 多晶包裹体
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=621CF755B1A341E5&jid=2013B5467E3054B1614CEC199353FCED&aid=B565C58D3ADEEC4110753AF291C669C9&yid=DE12191FBD62783C&vid=C5154311167311FE&iid=9CF7A0430CBB2DFD&sid=F77EA1B361947C8B&eid=49A922F48C3B1A31&journal_id=1000-0569&journal_name=岩石学报&referenced_num=3&reference_num=76