• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Convention of the Gulf Coast Association of Geological Societies American Association of Petroleum Geologists Sectional Meeting;Meeting of the Gulf Coast Section of the Society of Economic Paleontologists and Mineralogists >Laramide Deformation along the Southern Rocky Mountain Front: Provenance Record from the Raton and Galisteo-EI Rito Basins of Colorado and New Mexico
【24h】

Laramide Deformation along the Southern Rocky Mountain Front: Provenance Record from the Raton and Galisteo-EI Rito Basins of Colorado and New Mexico

机译：沿着南岩石山前面的拉拉山脉变形：来自raton和Galisteo-ei rito盆地的种源记录科罗拉多州和新墨西哥州

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Large-scale partitioning of the Cretaceous Cordilleran (Sevier) foreland basin into isolated Laramide basins is addressed through analysis of the provenance record in the Paleogene Raton and Galisteo-El Rito basins of southern Colorado and northern New Mexico. These broken foreland basins, flanked by Laramide basement uplifts, recorded the retreat of the Cretaceous Western Interior Seaway and Paleogene progradation of fluvial and alluvial-fan systems. We conducted detrital zircon U-Pb geochronology on strata from the Raton and Galisteo-El Rito basins in order to constrain sediment sources and patterns of regional exhumation related to changing deformation patterns. In addition, heavy mineral analyses on Galisteo-El Rito deposits provide supplementary evidence for provenance shifts. Major grain populations derive from: (a) Mazatzal-Yavapai transitional basement (1800 to 1600 Ma) of the Sangre de Cristo range; (b) 1400 Ma granitic intrusions; (c) 1200 to 900 Ma Grenville crystalline rocks; (d) Paleozoic rocks from the Appalachian orogen (500 to 300 Ma); (e) recycled grains from Mesozoic strata; and (f) Mesozoic igneous rocks from the Cordilleran magmatic arc (<250 Ma). These basins record the partitioning of the Cretaceous foreland basin by Laramide basement uplifts, recognizable in both provenance signals and depositional styles, corresponding to eastward propagation of the Laramide deformation front and resultant advance of flexural depocenters in the North American interior. In the Raton Basin, Cordilleran, Appalachian, and Grenville peaks are only found in the Cretaceous Dakota and Vermejo formations associated with the Western Interior Seaway of the Sevier foreland. Cordilleran peaks are absent from Paleocene-Eocene samples, consistent with significant, continental drainage reorganization during Laramide deformation. In the Galisteo-El Rito basin system, we recognize a shift to dominantly Mazatzal-Yavapai basement ages in the Paleocene El Rito Formation and Oligocene Ritito Formation. The heavy mineral results show a shift to a more immature, metamorphic source composition. These new datasets bear upon reconstructions of North American paleodrainage and have important implications for potential linkages between major fluvial systems of the southern Rocky Mountains and Paleogene deepwater reservoir units in the Gulf of Mexico basin.
机译：通过分析科罗拉多州南部和新墨西哥州北部的古代raton和Galisteo-El Rito盆地的出处记录，解决了Cretapous Cordillan（Sevier）前陆盆地的大规模分区。这些破碎的前陆盆地，侧翼的是Laramide地下室隆起，记录了白垩纪西部室内海路和古常工促成的河流和冲积风扇系统的撤退。我们在Raton和Galisteo-El Rito盆地中对地层进行了替代锆石U-PB地理学，以限制沉积物来源和与改变变形模式相关的区域挖掘模式。此外，Galisteo-El Rito沉积物上的重型矿物分析提供了归属班次的补充证据。主要粮食种群来自：（a）萨格拉尔 - 亚维亚海过渡地下室（1800至1600 ma）的Sangre de Cristo系列; （b）1400 mA花岗岩入侵; （c）1200至900 ma Grenville结晶岩石; （d）来自阿巴拉契亚orenogen（500至300 mA）的古生代岩石; （e）来自中生代地层的再生谷物; （f）来自Cordilleran岩浆弧（<250 mA）的中生代火岩。这些盆地记录了Laramide地下室隆起的白垩纪前陆盆地的分区，可识别出原子生物信号和沉积款式，对应于北美内部弯曲吊舱的弯曲复印前后的东方传播。在Raton盆地，Cordilleran，Appalachian和Grenville Peaps仅在与Sevier Foreland的西部室内海滨相关联的白垩纪达科他州和谷梅族地球中发现。古典 - 埃世样品中缺乏古典峰，始终如一，在Linaide变形期间符合显着的欧式排水重组。在Galisteo-El Rito盆地系统中，我们认识到古典elRito形成和少茂丽托形成的古典玛萨达拉亚拜达地下室的转变。重型矿物质结果显示转变为更不成熟的变质源组合物。这些新的数据集承受了北美古植物的重建，对墨西哥湾湾南岩石山脉和古代深水储层单位的主要河流系统之间的潜在联系有重要意义。

著录项

相似文献

  • 外文文献
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号