您的位置: 专家智库 > >

国家自然科学基金(40473019)

作品数:4 被引量:203H指数:4
相关作者:范蔚茗王岳军石玉若彭头平梁新权更多>>
相关机构:中国地质科学院中国科学院更多>>
发文基金:国家自然科学基金中国科学院知识创新工程更多>>
相关领域:天文地球更多>>

文献类型

  • 4篇中文期刊文章

领域

  • 4篇天文地球

主题

  • 4篇锆石
  • 2篇SHRIMP...
  • 1篇地壳物质
  • 1篇地球年代学
  • 1篇定年
  • 1篇岩石
  • 1篇岩石学
  • 1篇印支期
  • 1篇印支期花岗岩
  • 1篇早中生代
  • 1篇三叠
  • 1篇三叠世
  • 1篇年代学
  • 1篇年龄测定
  • 1篇热事件
  • 1篇中三叠世
  • 1篇中生代
  • 1篇流纹岩
  • 1篇铝质
  • 1篇花岗岩

机构

  • 2篇中国科学院
  • 2篇中国地质科学...

作者

  • 2篇彭头平
  • 2篇石玉若
  • 2篇王岳军
  • 2篇范蔚茗
  • 1篇刘敦一
  • 1篇梁新权
  • 1篇苗来成

传媒

  • 2篇Scienc...
  • 1篇科学通报
  • 1篇中国科学(D...

年份

  • 1篇2006
  • 3篇2005
4 条 记 录,以下是 1-4
排序方式:
Meso-Cenozoic uplifting and exhumation on Yunkaidashan:Evidence from fission track thermochronology被引量:8
2005年
Yunkaidashan, located at the southern South China block (SCB) and closely adjacent to the Indochina block, is an ideal region for better understanding the temporal and spatial framework of tectonothermal overprinting at the southern SCB since Mesozoic. Apatite and zircon fission track thermochronology of various-type rocks from Yunkaidashan is presented in this paper. The results show, no matter what rocks are, the apparent ages of zircon fission track range from 97.4 to 133.0 Ma, and those of apatite fission track from 43.2 to 68.4 Ma. The length of apatite fission track yields an average confined track length of ~13 μm and shows normal distribution of unimodal frequency. It is inferred that the uplifting amplitude has been more than 5 km in Yunkaidashan since late Mesozoic. The difference of fission track apparent ages at different locations in Yunkaidashan suggests a paleophysiognomic scenario of the heterogeneous uplift/denudation. These data of the fission track thermochronology provide new constraints for better understanding the tectonophysiognomic pattern of the SCB since late Mesozoic.
LIXiaomingWANGYuejunTANKaixuanPENGTouping
关键词:锆石风化作用
澜沧江南段早中生代酸性火成岩SHRIMP锆石U-PB定年及构造意义被引量:76
2006年
应用SHRIMP方法对澜沧江南段临沧花岗岩体和云县忙怀组流纹岩代表性样品进行了精确的SHRIMP锆石U-PB定年研究.临沧岩体北段黑云母二长花岗岩(02DX-137)锆石年龄为229.4±3.0MA,南段景洪地区黑云母二长花岗岩(20JH-10)锆石年龄为230.4±3.6MA,两者在误差范围具有一致的年龄,可能代表了临沧花岗岩体主体的形成年龄.云县棉花地忙怀组上段的流纹岩样品(02DX-95)给出了231.0±5.0MA的SHRIMP锆石U-PB年龄.这些资料为理解滇西古特提斯构造演化提供了重要信息.临沧岩体南段黑云母花岗岩中存在1977±44MA锆石年龄,表明区内可能存在着早元古代结晶基底.
彭头平王岳军范蔚茗刘敦一石玉若苗来成
关键词:中三叠世
湖南印支期花岗岩SHRIMP锆石U-Pb年龄及其成因启示被引量:98
2005年
针对湖南印支期花岗岩3个典型代表性岩体(沩山、关帝庙唐市超单元岩体和白马山龙潭超单元岩体)系统的SHRIMP锆石U-Pb年龄测定表明:上述3个黑云母二长花岗岩体的代表性样品分别给出了244±4,239±3和243±3Ma的谐和年龄,代表了区内印支期典型花岗岩体的形成时代.表明区内传统上被认为属印支期的过铝质花岗岩有着更局限的形成时代.结合其他年代学资料认为华南内陆印支期花岗岩很可能是同一次构造热事件的产物,其空间分布整体上似面状展布,其形成与陆内地壳物质叠置加厚作用有关,这为深入理解华南印支期花岗岩的精细时空格架及早中生代演化的动力学机制提供了重要依据.
王岳军范蔚茗梁新权彭头平石玉若
关键词:SHRIMP锆石U-PB年龄印支期U-PB年龄测定过铝质花岗岩构造热事件地壳物质
SHRIMP zircon U-Pb geochronology of Indosinian granites in Hunan Province and its petrogenetic implications被引量:41
2005年
The SHRIMP zircon U-Pb geochronology ofthree typically Indosinian granitic plutons with peralumi-nous and potassium-rich affinities (Tangshi ultraunit forWeishan and Baimashan, and Longtan ultraunit forGuandimiao) is presented in Hunan Province, South China.The analyses of zircons from biotite monozonite granites forWeishan, Baimashan and Guandimiao plutons show the sin-gle and tight clusters on the concordia, and yield theweighted mean 206Pb/238U ages of 244±4, 243±3 and 239±3Ma, respectively, representing the crystallized ages of theseIndosinian granites. These data suggest that the Indosiniangranitic plutons as previously thought formed at a narrowage span. In combination with other data, it is inferred thatthe Indosinian granites within the South China Block proba-bly distributed in Hunan, Jiangxi, Guangxi and Guangdongprovinces as planar shape, and were the derivation of thecrustal materials in the intracontinental thickening setting.These precisely geochronological data provide importantconstraints for better understanding the spatiotemporal pat-tern of the Indosinian peraluminous granites and earlyMesozoic tectonic evolution of the South China Block.
WANGYuejunFANWeimingLIANGXinquanPENGToupingSHIYuruo
关键词:锆石地球年代学岩石学
共1页<1>
聚类工具0