Heavy minerals from Paleogene sediments at DSDP Leg 81 Holes ...
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 Pl...
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| Format: | Article in Journal/Newspaper |
| Language: | English |
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PANGAEA
1984
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| Online Access: | https://dx.doi.org/10.1594/pangaea.806761 https://doi.pangaea.de/10.1594/PANGAEA.806761 |
| Summary: | 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 ... : Supplement to: Morton, Andrew C (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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