Chemical comparison of spherules from the Ross Sea and glacial sediment of Antarctica: an SEM study
Four (about 100 ?m in diameter) clear spherules from seafloor sediments of the Ross Sea differ physically and chemically from three microscopic dark spherules of about the same size from glacial deposits in Antarctica and upper New York state. The major-element concentrations (determined by SEM) sho...
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The Ohio State University
1995
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ftohiostateu:oai:kb.osu.edu:1811/57016 2023-05-15T13:38:14+02:00 Chemical comparison of spherules from the Ross Sea and glacial sediment of Antarctica: an SEM study Everett, Christopher R. Faure, Gunter 1995-08 application/pdf http://hdl.handle.net/1811/57016 en_US eng The Ohio State University The Ohio State University. Department of Geological Sciences Senior Theses; 1995 http://hdl.handle.net/1811/57016 Thesis 1995 ftohiostateu 2020-08-22T19:22:56Z Four (about 100 ?m in diameter) clear spherules from seafloor sediments of the Ross Sea differ physically and chemically from three microscopic dark spherules of about the same size from glacial deposits in Antarctica and upper New York state. The major-element concentrations (determined by SEM) show that the clear spherules differ in composition from the dark spherules. The clear spherules were found to be similiar in composition to the continental crust, indicating a terrestrial origin. Based on their physical structure and chemical composition, they are likely a biogenically-produced form of opal. The composition of each dark spherule was compared to the compositions of the continental crust and CI chondrites. The results are inconclusive. Therefore, they may be either terrestrial or extraterrestrial in origin. In addition, the dark spherules differ markedly in composition amongst themselves. Thesis Antarc* Antarctica Ross Sea Ohio State University (OSU): Knowledge Bank Ross Sea |
institution |
Open Polar |
collection |
Ohio State University (OSU): Knowledge Bank |
op_collection_id |
ftohiostateu |
language |
English |
description |
Four (about 100 ?m in diameter) clear spherules from seafloor sediments of the Ross Sea differ physically and chemically from three microscopic dark spherules of about the same size from glacial deposits in Antarctica and upper New York state. The major-element concentrations (determined by SEM) show that the clear spherules differ in composition from the dark spherules. The clear spherules were found to be similiar in composition to the continental crust, indicating a terrestrial origin. Based on their physical structure and chemical composition, they are likely a biogenically-produced form of opal. The composition of each dark spherule was compared to the compositions of the continental crust and CI chondrites. The results are inconclusive. Therefore, they may be either terrestrial or extraterrestrial in origin. In addition, the dark spherules differ markedly in composition amongst themselves. |
author2 |
Faure, Gunter |
format |
Thesis |
author |
Everett, Christopher R. |
spellingShingle |
Everett, Christopher R. Chemical comparison of spherules from the Ross Sea and glacial sediment of Antarctica: an SEM study |
author_facet |
Everett, Christopher R. |
author_sort |
Everett, Christopher R. |
title |
Chemical comparison of spherules from the Ross Sea and glacial sediment of Antarctica: an SEM study |
title_short |
Chemical comparison of spherules from the Ross Sea and glacial sediment of Antarctica: an SEM study |
title_full |
Chemical comparison of spherules from the Ross Sea and glacial sediment of Antarctica: an SEM study |
title_fullStr |
Chemical comparison of spherules from the Ross Sea and glacial sediment of Antarctica: an SEM study |
title_full_unstemmed |
Chemical comparison of spherules from the Ross Sea and glacial sediment of Antarctica: an SEM study |
title_sort |
chemical comparison of spherules from the ross sea and glacial sediment of antarctica: an sem study |
publisher |
The Ohio State University |
publishDate |
1995 |
url |
http://hdl.handle.net/1811/57016 |
geographic |
Ross Sea |
geographic_facet |
Ross Sea |
genre |
Antarc* Antarctica Ross Sea |
genre_facet |
Antarc* Antarctica Ross Sea |
op_relation |
The Ohio State University. Department of Geological Sciences Senior Theses; 1995 http://hdl.handle.net/1811/57016 |
_version_ |
1766102942795956224 |