%0 Journal Article
%T Fluid during the UHP metamorphism: constraints from the petrology, oxygen isotope and fluid inclusion studies of the Sulu UHP metamorphic rocks.<br>超高压变质作用过程中的流体——来自苏鲁超高压变质岩岩石学、氧同位素和流体包裹体研究的限定
%A ZHANG ZeMing
%A SHEN Kun
%A ZHAO XuDong
%A SHI Chao
%A <br>张泽明
%A 沈昆
%A 赵旭东
%A 石超
%J 岩石学报
%D 2006
%I 
%X Based on the comprehensive investigations of the petrology, oxygen isotope, fluid inclusion and nominally anhydrous minerals (NAMs) of the ultrahigh-pressure (UHP) metamorphic rocks from the Sulu orogenic belt it has been shown that fluids have played important and multiple roles and experienced complicated evolution processes by fluid-rock interactions during the subduction and exhumation of the continental crust. The features are as follows. (1) The supracrustal materials were extensively hydrated by the interaction with cold meteoric water with extremely low oxygen isotopic compositions. (2) A series of dehydration reactions took place during subduction of the hydrated continental crust; the released fluids mainly entered into volatile-bearing HP and UHP minerals, such as glaucophane, phengite and epidote, apatite, and into nominally anhydrous minerals, such as garnet, omphacite, rutile and coesite. (3) The salinity of the fluids increased by selective reactions with UHP metamorphic minerals; consequently high-salinity and high density aqueous fluids were produced at the peak-UHP metamorphism. In addition, fluids of CO2, N2, CH4 or their mixtures occurred locally that are probably related with decomposition of organic substances. (4) Fluids exsolved from the NAMs are the main source for the HP hydrations of retrogression and for the forming of local HP veins during the early stage of uplift of UHP rocks. (5) Extensive amphibolite-facies retrograde metamorphism of UHP rocks took place by pervasive activities of low-salinity aqueous fluids. (6) The greenschist-facies overprinting and low-pressure quartz veins were produced by low-temperature fluid-rock interactions along the ductile-shear zones and brittle faults during the late stage of uplift of UHP rocks. (7) H2O and/or CO2-HO2 fluids with variable salinity were dominated during the subduction and exhumation of the continental crust.
%K Continental deep subduction
%K UHP metamorphism
%K Fluid-rock interactions<br>大陆深俯冲
%K 超高压变质
%K 流体-岩石相互作用
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=621CF755B1A341E5&jid=2013B5467E3054B1614CEC199353FCED&aid=1426E2D655F53DB1&yid=37904DC365DD7266&vid=BC12EA701C895178&iid=DF92D298D3FF1E6E&sid=74E41645C164CD61&eid=8CAA3A429E3EA654&journal_id=1000-0569&journal_name=岩石学报&referenced_num=7&reference_num=130