| DOI: | 10.1306/11051009105
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| Scopus记录号: | 2-s2.0-80051517297
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| 论文题名: | Multiple cycles of wave-dominated estuarine deposits in low-accommodation settings, Cretaceous J sandstone, northwestern Nebraska |
| 作者: | Antia J.; Fielding C.R.; Joeckel R.M.
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| 刊名: | AAPG Bulletin
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| ISSN: | 0149-1845
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| EISSN: | 1558-9575
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| 出版年: | 2011
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| 发表日期: | 2011
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| 卷: | 95, 期:7 | | 起始页码: | 1227
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| 结束页码: | 1256
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| 语种: | 英语
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| Scopus关键词: | Estuarine deposits
; Estuarine settings
; Litho-stratigraphic
; Lithofacies
; Nebraska
; Reservoir characterization
; Sequence stratigraphy
; Shoreface
; Study areas
; Third-order
; Transgressive systems tracts
; Upper Cretaceous
; Vertical stacking
; Wyoming
; Crystallography
; Hydrocarbons
; Mineralogy
; Minerals
; Petroleum reservoirs
; Sandstone
; Stratigraphy
; Estuaries
; correlation
; craton
; Cretaceous
; data set
; depositional environment
; estuarine environment
; fossil record
; hydrocarbon
; identification method
; landscape
; lithofacies
; magnitude
; mineralogy
; mudstone
; paleoenvironment
; paleosol
; sandstone
; stratigraphy
; wave
; Nebraska
; United States
; Cruziana
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| Scopus学科分类: | Energy
; Earth and Planetary Sciences
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| 英文摘要: | The J sandstone comprises less than 46 m (151 ft) of sandstonedominated strata within the mudrock-dominated lower Upper Cretaceous succession of northwestern Nebraska. The unit is a prolific hydrocarbon producer in this region (Denver-Julesburg Basin), but its lithostratigraphic and sequence-stratigraphic framework, critical for reservoir characterization and mapping, is poorly known. We have achieved an improved understanding of depositional history and sequence stratigraphy by describing and correlating cores and wireline logs from wells within Sioux, Dawes, and Box Butte counties, Nebraska, and Niobrara and Goshen counties, Wyoming. Coals, paleosols, fluvial or inner estuarine sandstones, estuarine mudstones, fluvial conglomerate, shoreface sandstone, and reworked volcanic fallout (bentonite) lithofacies were identified. Trace fossil assemblages representing stressed expressions of the Sholithos and Cruziana ichnofacies are common. These lithofacies are arranged vertically into three erosionally based cycles, each less than 28 m (92 ft) thick, and each grade upward from fluvial or inner estuarine sandstones into estuarine mudstones and in turn into shoreface sandstones. The lateral and vertical stacking patterns of the lithofacies are complex, however, and the upper cycles appear to fill space eroded into the underlying ones. Northeast-southwest-elongate isochore trends appear in all three cycles. Lithofacies transition downdip from inner estuarine sandstones in the northeast to estuarine basin mudstones and shoreface sandstones toward the southwest. Detrital mineralogy indicates an easterly (cratonic) provenance for the entire unit. Our data suggest that the J sandstone in northwestern Nebraska accumulated in wave-dominated estuarine settings, as part of a long-lived transgressive systems tract. The unit as a whole occupies a complexly incised landscape cut during a thirdorder lowstand ca. 98 Ma. Coeval cycles of similar magnitude throughout the Western Interior suggest that the three cycles represent eustatic fluctuations. The highest quality reservoirs occur at the base of the unit in inner estuarine lithofacies in the central and southwestern parts of the study area. Copyright ©2011. The American Association of Petroleum Geologists. All rights reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-80051517297&doi=10.1306%2f11051009105&partnerID=40&md5=b13a48bdc080fb3670255773d437dd4d
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/13414
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| Appears in Collections: | 过去全球变化的重建
影响、适应和脆弱性
科学计划与规划
气候变化与战略
全球变化的国际研究计划
气候减缓与适应
气候变化事实与影响
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| Recommended Citation: | |
Antia J.,Fielding C.R.,Joeckel R.M.. Multiple cycles of wave-dominated estuarine deposits in low-accommodation settings, Cretaceous J sandstone, northwestern Nebraska[J]. AAPG Bulletin,2011-01-01,95(7)
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