Archive · collection · 2007
Chemical composition of rocks and minerals from the Weddell Sea
Listed in PANGAEA and DataCite — shown once because both records carry DOI 10.1594/pangaea.725523
Studied samples represent bedrock occurrences rather than products of transportation by floating ice.
Description
Two regions were distinguished: the East Antarctic margin (submarine Maud Ridge) characterized by intensive destruction and oceanization of the continental crust, and the northwestern part of the Weddell Sea (Powell Basin), where spreading processes are superimposed on the weakly destructed continental crust. Volcanic rocks of the Maud Ridge derive from an enriched mantle source.
The following geologic section was observed: young fresh porous basaltic porphyrites underlain by older massive basaltic porphyrites metamorphosed under greenschist-facies conditions. Presence of granulite-facies rocks suggests continental origin for these rocks. Mineralogical and geochemical features of magmatic rocks collected from various areas of the Weddell Sea floor may indicate contribution of deep fluids.
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We believe that the magmatic replacement of the Precambrian granite-metamorphic complex of the continental basement by basic-ultrabasic mantle material played the main role in transformation of the continental crust into the secondary oceanic crust. This process occurred under significant contribution of fluid flows and uneven activity of geologic processes, in contrast to formation of the primary oceanic crust because of seafloor spreading.
Our results suggest that the basement of the Weddell Sea is of continental origin and has experienced extensive destruction.
Links
Where it is published
- Repository landing page doi.pangaea.de/10.1594/PANGAEA.725523 ↗
landing page · from DataCite
- DOI doi.org/10.1594/pangaea.725523 ↗
DOI / persistent id · from PANGAEA
Documentation and papers
- Creative Commons Attribution 3.0 Unported creativecommons.org/licenses/by/3.0/legalcode ↗
license · from DataCite
- IsSupplementTo 10.1134/s0016702907070075 doi.org/10.1134/s0016702907070075 ↗
publication · from DataCite
Catalogue records · 3
- OAI-PMH record ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=oai_dc&identifier=o… ↗
metadata API · from PANGAEA
- DataCite API api.datacite.org/dois/10.1594/pangaea.725523 ↗
metadata API · from DataCite
- DataCite Commons commons.datacite.org/doi.org/10.1594/pangaea.725523 ↗
catalogue entry · from DataCite
Topics
- From keywords
- Earth & Environmental Science
Related
- Possibly the same asChemical composition of rocks and minerals from the Weddell Sea
Provenance · 2 source records, 7 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| PANGAEA | oai:pangaea.de:doi:10.1594/PANGAEA.725523 | 15 d ago | JSON v1 |
| DataCite | 10.1594/pangaea.725523 | 15 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · PANGAEA | connector:pangaea@1.0.0 | |
| concepts[field].local:field:earth-environmental | mapping · PANGAEA | connector:pangaea@1.0.0 | |
| description | source · PANGAEA | connector:pangaea@1.0.0 | /metadata/dc/description |
| license | source · PANGAEA | connector:pangaea@1.0.0 | /metadata/dc/rights |
| publication_date | source · PANGAEA | connector:pangaea@1.0.0 | |
| spatial | source · PANGAEA | connector:pangaea@1.0.0 | |
| title | source · PANGAEA | connector:pangaea@1.0.0 | /metadata/dc/title |