Skip to content
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Menu
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Menu
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
Further studies of the nature, composition and ages of contemporary phosphorite from the Namibian Shelf
Earth and Planetary Science Letters, Volume 69, No. 2, Year 1984
Notification
URL copied to clipboard!
Description
Major and minor element and radiochemical data are examined for a set of phosphorite concretions and other phosphatic material from the Namibian Shelf. The concretions were separated on a morphological basis from grab samples taken in a transect of shallowing depth over the diatomaceous ooze belt. Compositional data indicate that the samples are fairly pure carbonate-fluorapatite, and trend towards a maximum 32% P2O5 content. A range of compositional variability similar to other samples from the Namibian Shelf is observed. Radiochemical systematics confirm that pelletal phosphorite and glauconitized pelletal phosphorite from depths > 170 m are at radioactive equilibrium, and are therefore old and reworked. The concretions, collected from depths shallower than 78 m, are entirely Recent, with maximum ages in the range 500-3800 years. They may be much younger. Despite distinct textural and small compositional differences, similar ages are found for separates from the same grab. Samples of fish scales and an unidentified high-magnesian phosphate mineral are also shown to have incorporated uranium recently. © 1984.
Authors & Co-Authors
Thomson, John C.
United Kingdom, Southampton
National Oceanography Centre Southampton
Calvert, Stephen E.
Canada, Vancouver
The University of British Columbia
Mukherjee, S.
Canada, Vancouver
The University of British Columbia
Burnett, William C.
United States, Tallahassee
Florida State University
Bremner, James Michael
South Africa, Cape Town
University of Cape Town
Statistics
Citations: 34
Authors: 5
Affiliations: 4
Identifiers
Doi:
10.1016/0012-821X(84)90193-6
ISSN:
0012821X