| DOI: | 10.1306/03261211119
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| Scopus记录号: | 2-s2.0-84867638152
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| 论文题名: | Deltaic process and architectural evolution during cross-shelf transits, Maastrichtian Fox Hills Formation, Washakie Basin, Wyoming |
| 作者: | Olariu M.L.; Carvajal C.R.; Olariu C.; Steel R.J.
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| 刊名: | AAPG Bulletin
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| ISSN: | 0149-1728
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| EISSN: | 1558-9458
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| 出版年: | 2012
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| 发表日期: | 2012
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| 卷: | 96, 期:10 | | 起始页码: | 1931
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| 结束页码: | 1956
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| 语种: | 英语
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| Scopus关键词: | Architectural evolution
; Compensational stacking
; Deltaic deposits
; External shape
; In-process
; Laramide
; Process change
; Progradation
; Shelf edges
; Well logs
; Wyoming
; Well logging
; Petroleum geology
; architecture
; deltaic deposit
; landscape evolution
; Maastrichtian
; progradation
; sandstone
; shelf break
; United States
; Washakie Basin
; Wyoming
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| Scopus学科分类: | Energy
; Earth and Planetary Sciences
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| 英文摘要: | The topset compartments of two Maastrichtian basin-scale clinothems are characterized, with focus on the function they played in constructing the Lance-Fox Hills-Lewis shelf-margin sedimentary prism in the Laramide Washakie Basin, south Wyoming. Approximately 1000 well logs were used to map the delta lobes and complexes on the Fox Hills shelf and to detail their depositional character, dimensions, and orientation as they autogenically shifted during transit from an inner-shelf to shelf-edge position. The regressive transits of the deltas initiated up to 40 km (25 mi) landward from the preexisting shelfedge and preserved river and wave-dominated deltaic deposits that thicken and concentrate sand on the outer shelf. Tidally influenced deltas (now outcropping) also occur in localized areas along the paleoshelf edge, probably where wave influence was reduced along invaginated coastal segments. Net sandstone maps of the individual clinothem topsets show that (1) coeval delta lobes exist within each clinothem, suggesting multiple rivers; (2) delta lobes have a likely autogenic compensational stacking pattern; and (3) deltas thicken and storm-wave influence become dominant closer to the shelf edge. Our results support the ideas of (1) predictable increased wave influence and (2) change to strike-elongate architecture as deltas transit the shelf. In addition, along-strike changes in process dominance cause deltaic reservoirs to be highly variable in their orientation, external shape, and internal character. Some process changes are interpreted to be autogenic responses during overall shoreline progradation. The study also provides new data on delta-lobe and delta-complex thicknesses as well as on deltaic coastline versus shelf-edge progradation rates. © 2012. The American Association of Petroleum Geologists. All rights reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84867638152&doi=10.1306%2f03261211119&partnerID=40&md5=e3f2ebce5420787d0c7def577de03e51
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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/13298
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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: | |
Olariu M.L.,Carvajal C.R.,Olariu C.,et al. Deltaic process and architectural evolution during cross-shelf transits, Maastrichtian Fox Hills Formation, Washakie Basin, Wyoming[J]. AAPG Bulletin,2012-01-01,96(10)
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