| 1 | 中国中部东段高压-超高压变质岩的^(40)Ar/^(39)Ar地质年代学和剥露作用显示文摘中国中部东段红安—大别山地区高压和超高压(HP-UHP)变质杂岩新的^(40)Ar/^(39)Ar年龄数据证明,紧随三叠纪大陆碰撞和变质作用之后,该区存在两期冷却的剥露作用历史。红安地区蓝片岩-含蓝晶石榴辉岩相岩石内多硅白云母的年龄数据,记录了碰撞带内在230~195Ma之间的初期剥露作用。而大别山混合岩和含榴辉岩片麻岩中黑云母与角闪石的年龄则记录了128~117Ma间的一次冷却事件,该事件与一区域性地亮深熔作用幕和花岗岩体侵位相当。 三叠纪—早侏罗世的^(40)Ar/^(39)Ar冷却年龄证实了以前发表的U-Pb和Sm-Nd变质作用年龄,暗示这些岩石的初期剥露作用进行得很快。在变质作用之后,HP-UHP岩系中花岗质熔体约80Ma的侵位表明,该变质岩或者以缓慢的速率剥露,或者在初期快速剥露之后,剥露作用在深部中止。 | E.A.Eide 李志昌 | 1995 | 国外花岗岩类地质与矿产1995，0，2： | 0 |
| 2 | High-pressure/low-temperature Metamorphism in Northern Hubei Province,Central China显示文摘The Qinling-Dabie accretionary fold belt in east-central China represents the E-W trending suture zone between the Sino-Korean and Yangtze cratons. A portion of the accretionary complex exposed in northern Hubei Province contains a high-pressure / low-temperature metamorphic sequence progressively metamorphosed from the blueschist through greenschist to epidote-amphibolite / eclogite facies. The Hongan metamorphic belt can be divided into three metamorphic zones,based on progressive changes in mineral assemblages: Zone Ⅰ,in the south,is characterized by transitional blueschist-greenschist facies; ZoneⅡis characterized by greenschist facies; ZoneⅢ,in the northern most portion of the belt,is characterized by eclogite and epidote-amphibolite facies sequences. Changes in amphibole compositions from south to north as well as the appearance of increasingly higher pressure mineral assemblages toward the north document differences in metamorphic P-T conditions during formation of this belt. Preliminary P-T estimates for Zone I metamorphism are 5 ~ 7 kbar,350 ~ 450℃; estimates for Zone III eclogites are 10 ~ 22 kbar,500 ±50℃. The petrographic,chemical and structural characteristics of this metamorphic belt indicate its evolutionin a northward-dipping subduction zone and subsequent uplift prior to and during the final collisionbetween the Sino-Korean and Yangtze cratons. | G.Zhou Y.J.Liu E.A.Eide J.G.Liou W.G.Ernst | 2016 | 资源环境与工程2016，30，B04： | 0 |
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