气候变化领域集成服务门户(CCPortal): Cretaceous strata at the west edge of the Canadian Rocky Mountains- A piggyback basin remnant of the Western Canada foreland basin

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DOI	10.1130/B31821.1
	Cretaceous strata at the west edge of the Canadian Rocky Mountains- A piggyback basin remnant of the Western Canada foreland basin
	McMechan M.E.; Currie L.D.; Matthews W.A.; Sweet A.R.; Reyes J.
发表日期	2018
ISSN	167606
起始页码	1216
结束页码	1230
卷号	130 期号:2021-07-08
英文摘要	Outliers of Cretaceous strata at the west edge of the Canadian Rocky Mountains, deposited 110 km west of the Western Canada foreland basin foredeep, provide the first direct evidence of a piggyback basin in the Canadian Cordillera and impart new insights on the stratigraphy, U-Pb detrital zircon provenance, burial history, and tectonic setting of this area. Three successions are preserved in down-dropped, fault-bounded slices along the Redwall fault: late Middle Albian to Upper Albian Blairmore Group mixed clastics and minor limestone deposited in floodplain and swamp environments; unnamed Cenomanian mixed clastic floodplain deposits; and an unnamed alluvial/fluvial conglomeratic unit dominated by proximal eastern-sourced pebble to cobble conglomerate of probable Coniacian to Santonian age. All units are in the oil window. Estimated maximum temperatures for Cenomanian strata are 115-135 °C. U-Pb detrital zircon ages indicate that Upper Cretaceous units were primarily recycled from Mesozoic and Upper Paleozoic strata. with minimal input from both older sedimentary and western sources. Blairmore strata overlapped an eroded Upper Jurassic-Lower Cretaceous orogenic wedge and appear to have been contiguous with the foredeep succession. Upper Cretaceous conglomerates were derived from highlands to the east formed by uplift along thrust faults. These sediments were deposited in a piggyback basin on the hinterland side of the Simpson Pass and Bourgeau thrusts and were carried > 70 km toward the foreland while being buried by an additional 4-5 km of sediment. The presence of this piggyback basin indicates a very low taper wedge with an extremely weak basal detachment. © 2018 The Authors.
语种	英语
来源期刊	Bulletin of the Geological Society of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185018
作者单位	Geological Survey of Canada-Calgary, Natural Resources Canada, 3303 33rd Street NW, Calgary, AB T2L 2A7, Canada; Department of Geoscience, University of Calgary, 2500 University Drive NW, Calgary, AB T2N 1N4, Canada
推荐引用方式 GB/T 7714	McMechan M.E.,Currie L.D.,Matthews W.A.,et al. Cretaceous strata at the west edge of the Canadian Rocky Mountains- A piggyback basin remnant of the Western Canada foreland basin[J],2018,130(2021-07-08).
APA	McMechan M.E.,Currie L.D.,Matthews W.A.,Sweet A.R.,&Reyes J..(2018).Cretaceous strata at the west edge of the Canadian Rocky Mountains- A piggyback basin remnant of the Western Canada foreland basin.Bulletin of the Geological Society of America,130(2021-07-08).
MLA	McMechan M.E.,et al."Cretaceous strata at the west edge of the Canadian Rocky Mountains- A piggyback basin remnant of the Western Canada foreland basin".Bulletin of the Geological Society of America 130.2021-07-08(2018).