Mineralogical Trends in Upper Paleocene-Lower Eocene Sediments of the Gulf Basin and Southern Rocky Mountains: Test for Synchroneity between Source Area Uplift and.....

海湾盆地和落基山脉南部上古新世-下始新世沉积物的矿物学趋势：源区隆起与……之间的同步性测试

• 批准号: 9205946
• 负责人: Earle McBride
• 金额: $ 14.12万
• 依托单位: University of Texas at Austin
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-06-15 至 1995-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9205946&HistoricalAwards=false
• 关键词: Mineralogical; Trends; Upper; Paleocene; Lower

Preliminary analysis of mineralogical trends through time in two large clastic wedges in the northwestern Gulf of New Mexico Basin (Wilcox and lower Claiborne Groups), and time-equivalent upper Paleocene-lower Eocene strata in Laramide basins of the Southern Rocky Mountains, suggests that the two-phase uplift history of Laramide orogeny described by Chapin and Cather (1983) may be recorded by detrital mineralogy. Temporal changes in composition also indicate that changing climate played a role in the evolution detrital mineralogy. The proposal is to study the temporal changes of detrital and diagenetic mineralogy in the Wilcox and lower Claiborne Groups of the northwestern Gulf of Mexico Basin, and coeval sediments in Laramide basins of the Southern Rocky Mountains. This information will provide a test of the theory that pulses of intracontinental Laramide tectonism are recorded by episodes of deltaic-wedge progradation in the Gulf of Mexico Basin. In particular, we will address the question: Is the response of delta growth geologically instantaneous, or does a geologically significant lag-time exist between filling of basins adjacent to interior uplifts and the deposition of associated sediment at the continental margin? Palynological analysis of sample intervals will place the trend of mineralogical changes within a time framework. This temporally constrained analysis of mineralogical changes will allow an assessment of synchroneity between interior-continental orogeny and continental-margin sedimentation.

中国大陆各时期矿物学趋势初步分析 位于新墨西哥州西北湾的两个大型碎屑楔 盆地（Wilcox和下Claiborne群）和时间等效 上古新统-下始新世地层 南落基山脉，表明两个阶段的隆起 Chapin和Cather（1983）描述的Laramide orthodox的历史 可能被碎屑矿物学记录下来。 的时间变化 此外，气候变化也在其中发挥了作用。 演化碎屑矿物学。 建议研究碎屑的时间变化， Wilcox和下Claiborne群的成岩矿物学 墨西哥湾盆地西北部， 洛矶山脉南部的拉腊米底盆地。 这些信息 将提供一个理论的测试， 三角洲-楔状体幕记录了Laramide构造作用 墨西哥湾盆地的扩张。 特别是要 解决这个问题：三角洲增长的反应是地质学上的吗？ 是瞬时的，还是存在地质上显著的滞后时间 与内部隆起相邻的盆地充填和 大陆边伴生沉积物的沉积？ 对样品间隔的孢粉学分析将确定 矿物学在时间框架内的变化。 这个暂时的 矿物学变化的约束分析将允许 海峡-大陆造山带同步性评价 大陆边缘沉积作用