DOI: 10.1306/08181009203
Scopus记录号: 2-s2.0-79955635239
论文题名: Stratigraphy and static connectivity of braided fluvial deposits of the lower Escanilla Formation, south central Pyrenees, Spain
作者: Labourdette R.
刊名: AAPG Bulletin
ISSN: 0149-1868
EISSN: 1558-9598
出版年: 2011
发表日期: 2011
卷: 95, 期: 4 起始页码: 585
结束页码: 617
语种: 英语
Scopus关键词: Field description
; Fluvial deposits
; Light detection and ranging
; Object based
; Orthophotographs
; Pyrenees
; Random simulation
; Single channels
; Stochastic simulations
; Three-dimensional model
; Vertical channels
; Deposits
; Morphology
; Sandstone
; Stochastic models
; Three dimensional
; Stratigraphy
; braided river
; channel morphology
; connectivity
; floodplain
; fluvial deposit
; geomorphological mapping
; mud
; numerical model
; orthophoto
; outcrop
; sandstone
; sedimentology
; static response
; stochasticity
; stratigraphy
; three-dimensional modeling
; Pyrenees
; Spain
Scopus学科分类: Energy
; Earth and Planetary Sciences
英文摘要: This study addressed the architecture and dimension distributions of fluvial deposits of the Olson Member of the Esca-nilla Formation through analysis of outcrops in the southern Buil syncline, Ainsa Basin, south central Pyrenees, Spain. The Olson Member consists of wide multistory channels alternating with mud-rich intervals composed of flood-plain deposits and "isolated" individual channels. Field descriptions and a combination of terrestrial light detection and ranging data and digital orthophotographs were used to map and document the abundance, distribution, and dimensions of sandstone bodies. These data show that channels are distributed according to the local stratigraphie framework and differential subsiding areas. Morphology (width, depth, and sinuosity) of the channels throughout the sequence evolve according to their strati-graphic position. During low-accommodation periods, channels stacked laterally, forming wide multistory channel belts. Under these conditions, single channels have a mean width-to- thickness (W:T) ratio of 49. During high-accommodation periods, single channels have a mean W:T ratio of 29. Moreover, the tendency of narrower and thicker channels having developed during high-accommodation periods is also clearly observable vertically from the base to the top of high-accommodation intervals throughout the sequence. This pattern of deposition results in increasing vertical connectivity, even in mud-rich high-accommodation periods. A geocellular three dimensional model has been performed using object-based simulations. A succession of stochastic simulations was performed from the simplest one (random simulations) to more elaborated simulations, integrating successively outcrop observations. These simulations serve to image sandstone bodies' connectivity evolution according to outcrop observations and sedimentologic knowledge. Subsurface application of such vertical channel morphology evolutions and distribution could lead to more predictive flow-unit definitions and extensions. Copyright ©2011. The American Association of Petroleum Geologists. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-79955635239&doi=10.1306%2f08181009203&partnerID=40&md5=743aa4e294c7f3a288bbdec1ba2eb5ad
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/13437
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:
Labourdette R.. Stratigraphy and static connectivity of braided fluvial deposits of the lower Escanilla Formation, south central Pyrenees, Spain[J]. AAPG Bulletin,2011-01-01,95(4)