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Morton, Andrew C (1984): Heavy minerals from Paleogene sediments at DSDP Leg 81 Holes [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.806761, Supplement to: Morton, AC (1984): Heavy minerals from Paleogene sediments, Deep Sea Drilling Project Leg 81: Their bearing on stratigraphy, sediment provenance, and the evolution of the North Atlantic. In: Roberts, DG; Schnittker, D; et al. (eds.), Initial Reports of the Deep Sea Drilling Project, Washington (U.S. Govt. Printing Office), 81, 653-661

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Abstract:
Five heavy mineral associations occur in the Paleocene and Eocene sediments recovered during Leg 81 of the Deep Sea Drilling Project (DSDP) in the SW Rockall area. Association 1, consisting of augite, iddingsite, and olivine, was derived from the basaltic rocks of the northern part of the Rockall Plateau. Association 2 consists of epidote group minerals, including piedmontite, and amphiboles of actinolite, actinolitic hornblende, and magnesio-hornblende compositions, and was derived from the metamorphic basement of south Greenland. Association 3 comprises garnet, augite, apatite, and edenitic and pargasitic amphiboles and has a provenance in the southern Rockall Plateau. Associations 4 (garnet, apatite, edenitic/pargasitic amphiboles) and 5 (garnet, apatite) are intrastratal solution derivatives of Association 3, with successive removal of first pyroxene and then amphibole with increasing depth of burial. Throughout the SW Rockall Plateau area there is a significant change in the spectrum of the above assemblages in the lower part of the Eocene. This change has been noted at Sites 403, 404, 553, and 555 and is defined by the last appearance of Association 2. This level therefore marks the cessation of sediment supply from southern Greenland and is the result of the final separation of Rockall and Greenland immediately prior to magnetic Anomaly 24.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Median Latitude: 56.212200 * Median Longitude: -22.530230 * South-bound Latitude: 56.042700 * West-bound Longitude: -23.343500 * North-bound Latitude: 56.561700 * East-bound Longitude: -20.782200
Date/Time Start: 1981-07-31T00:00:00 * Date/Time End: 1981-08-31T00:00:00
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
5 datasets

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Datasets listed in this publication series

  1. Morton, AC (1984): (Table 1) Heavy minerals at DSDP Site 81-552. https://doi.org/10.1594/PANGAEA.806739
  2. Morton, AC (1984): (Table 6) Heavy mineral and volcanic particle proportions at DSDP Site 81-552. https://doi.org/10.1594/PANGAEA.806748
  3. Morton, AC (1984): (Table 5) Compositions of amphibole populations at DSDP Holes 81-553A and 81-555. https://doi.org/10.1594/PANGAEA.806747
  4. Morton, AC (1984): (Table 2) Heavy minerals at DSDP Hole 81-553A. https://doi.org/10.1594/PANGAEA.806742
  5. Morton, AC (1984): (Table 3) Heavy minerals at DSDP Hole 81-555. https://doi.org/10.1594/PANGAEA.806746