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Sedimentary response to mantle plumes; implications from Paleocene onshore successions, West and East Greenland

Gregers Dam, Michael Larsen and Martin Sonderholm
Sedimentary response to mantle plumes; implications from Paleocene onshore successions, West and East Greenland
Geology (Boulder) (March 1998) 26 (3): 207-210

Abstract

The uplift history of the Upper Cretaceous-Paleocene sedimentary successions underneath the extensive Tertiary flood basalts of West and East Greenland supports recently described models for the generation of flood basalt provinces in response to rising, hot, mantle plumes. However, the sedimentary development indicates that the period of plume-related uplift prior to eruption of volcanic rocks was very short (<5 m.y.). Substantial regional uplift and faulting took place in West and East Greenland in the early Paleocene to earliest(?) late Paleocene, resulting in a basinwide unconformity. In West Greenland, the uplift was associated with fluvial peneplanation, valley incision, and catastrophic deposition; in East Greenland, it was associated with fluvial peneplanation. The cumulative uplift in West Greenland is probably on the order of several hundred meters, whereas in East Greenland, the observed uplift cannot be quantified. In both West and East Greenland, this phase was shortly followed by rapid, major subsidence associated with extensive volcanism. It is suggested that this sequence of events reflects the arrival of the North Atlantic mantle plume or plumes.


ISSN: 0091-7613
EISSN: 1943-2682
Coden: GLGYBA
Serial Title: Geology (Boulder)
Serial Volume: 26
Serial Issue: 3
Title: Sedimentary response to mantle plumes; implications from Paleocene onshore successions, West and East Greenland
Affiliation: Geological Survey of Denmark and Greenland, Copenhagen, Denmark
Pages: 207-210
Published: 199803
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 31
Accession Number: 1998-025821
Categories: Sedimentary petrologyStratigraphy
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. strat. col., sketch map
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States
Update Code: 199810
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