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Regional Diagenesis of Sandstones in the Upper Jurassic Morrison Formation, San Juan Basin, New Mexico and Colorado: Geologic, Chemical, and Kinetic Constraints

机译:圣胡安盆地,新墨西哥州和科罗拉多州上侏罗统莫里森组砂岩的区域成岩作用:地质,化学和动力学约束

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The Upper Jurassic Morrison Formation is the major uranium- and vanadium-bearing unit on the Colorado Plateau and, as such, has been the focus of numerous sedimentologic, petrologic, and geochemical studies. As a result, most research has concentrated on uranium ore-bearing strata; few studies have examined the regional petrology of the Morrison Formation. The major goal of the research discussed in this report was to extend a petrologic study of the Morrison Formation in eight U.S. Geological Survey (USGS) cores taken from drill holes in the Grants uranium region in the southwestern part of the San Juan basin to the rest of the basin in order to determine if observed diagenetic alteration patterns identified in the cores reflect basin-wide trends. A second objective was to use the mineralogy and paragenetic relationships of diagenetic assemblages to infer chemical processes responsible for observed postdepositional modifications of sandstones.

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