Deep Sea Drilling Project

Author(s): Supko, P. R.; Perch-Nielsen, K.
Author Affiliation(s): Primary:
Scripps Inst. Oceanogr., La Jolla, Calif., United States
Volume Title: Geotimes
Source: Geotimes, 20(1), p.19-20. Publisher: American Geological Institute, Alexandria, VA, United States. ISSN: 0016-8556 CODEN: GEOTAJ
Note: In English
Summary: Deep Sea Drilling Project (DSDP) operations in 1974 included Legs 34 and 37, which attempted deep crustal drilling in the Nazca Plate west of Peru and on the Mid-Atlantic Ridge; Legs 35 and 36 which constitute the second southern high-latitude program of the project; and Leg 38, an excursion into the Norwegian Sea area. Leg 35 (Feb.-Mar.) drilled 2 holes on the continental rise of the Bellingshausen Sea and 2 on the Bellingshausen Abyssal Plain. Major emphasis was on the age and nature of basement in this little-known area and on the study of facies to determine changes in erosion rates, glacial fluctuations, and paleocirculation effects with time. The predominantly terrigenous sediments indicate complex depositional mechanisms, including turbidity currents, ice rafting, and contour currents. Leg 36 (Apr.-May) was scheduled to operate in the Scotia Sea region but bad weather necessitated a mid-cruise reassignment of goals and plans, with emphasis then placed on the early history of the Falkland Plateau and the early opening of the southernmost Atlantic. The basement of the Plateau is meta-sedimentary gneiss and granite of the rifted Gondwana supercontinent overlain by sediments of coastal plain and then of euxinic marine facies. A Kimmeridgian-to-Neocomian hiatus may reflect crustal disruption associated with the opening of the South Atlantic.
Year of Publication: 1975
Research Program: DSDP Deep Sea Drilling Project
Key Words: 07 Marine Geology and Oceanography; 1974; Current research; Deep Sea Drilling Project; Oceanography; Practice; Review
Record ID: 1977002917
Copyright Information: GeoRef, Copyright 2017 American Geosciences Institute. Reference includes data from the Antarctic Bibliography, United States

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