Insights from scientific drilling on rifted continental margins

Author(s): Louden, Keith; Lau, Helen
Author Affiliation(s): Primary:
Dalhousie University, Department of Oceanography, Halifax, NS, Canada
Husky Oil Operations, Canada
Volume Title: Ocean drilling; successes, opportunities and challenges
Volume Author(s): Srivastava, Shiri, convener; Salisbury, Matthew; Enachescu, Michael
Source: Geoscience Canada, 28(4), p.187-195; GeoCanada 2000 millennium conference; ODP's 100 greatest hits, Calgary, AB, Canada, June 1, 2000, convened by Shiri Srivastava, Matthew Salisbury and Michael Enachescu. Publisher: Geological Association of Canada, Toronto, ON, Canada. ISSN: 0315-0941 CODEN: GSCNA5
Note: In English with French summary. 23 refs.; illus., incl. sects., geol. sketch maps
Summary: Sampling of sedimentary and crustal formations across rifted continental margins has long been a priority of DSDP, ODP, and other scientific ocean drilling. Recent results of drilling and related geophysical surveys across several margin segments in the North Atlantic have revealed that continents break apart in two fundamentally different ways. Volcanic margins form when rapid mantle upwelling produces a large amount of melt just prior to and during rifting. On non-volcanic margins, slow rates of rifting the continental crust expose regions of serpentinized mantle with little evidence of melting. Sampling, however, has thus far been restricted to regions of thin sediment cover, which has limited our ability to study the full range of rifted margin evolution. The next phase of scientific drilling will have enhanced capabilities that will allow drilling of both shallow-and deep-water basins, including those with thick sediments with hydrocarbon potential, such as the outer Grand Banks and Scotian margins. To make this a reality, it will be essential to combine both industry and academic interests and work to ensure continued Canadian participation.
Year of Publication: 2001
Research Program: DSDP Deep Sea Drilling Project
ODP Ocean Drilling Program
Key Words: 07 Marine Geology and Oceanography; 29 Economic Geology, Energy Sources; Arctic region; Atlantic Ocean; Boreholes; Continental crust; Continental margin; Crust; Deep Sea Drilling Project; Drilling; Europe; Geophysical methods; Geophysical profiles; Geophysical surveys; Grand Banks; Greenland; Iberian Peninsula; Lithosphere; Mantle; North Atlantic; Ocean Drilling Program; Oceanic crust; Petroleum; Petroleum exploration; Potential deposits; Reflection methods; Rift zones; Scotian Shelf; Seismic methods; Seismic profiles; Southern Europe; Surveys
Record ID: 2002076711
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute.

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