Provenance Dates and Feldspar Fractionation in Late Wisconsin Till of the Cuba Moraine, Ohio
Author Institution: Department of Geology and Mineralogy, The Ohio State University Late Wisconsin till of the Cuba Moraine in Ohio consists of sediment contributed by local Paleozoic bedrock and by the igneous and metamorphic rocks of the Canadian Precambrian Shield. Feldspar in this till is derive...
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ftohiostateu:oai:kb.osu.edu:1811/22946 2023-05-15T14:04:30+02:00 Provenance Dates and Feldspar Fractionation in Late Wisconsin Till of the Cuba Moraine, Ohio Taylor, Karen S. Faure, Gunter 1983-09 1096832 bytes application/pdf http://hdl.handle.net/1811/22946 en_US eng The Ohio Journal of Science. v83, n4 (September, 1983), 177-182 0030-0950 http://hdl.handle.net/1811/22946 1983 ftohiostateu 2020-08-22T19:36:00Z Author Institution: Department of Geology and Mineralogy, The Ohio State University Late Wisconsin till of the Cuba Moraine in Ohio consists of sediment contributed by local Paleozoic bedrock and by the igneous and metamorphic rocks of the Canadian Precambrian Shield. Feldspar in this till is derived predominantly from the Grenville and Superior structural provinces of Canada which are 1.07 b.y. and 2.70 b.y. old, respectively. Rb-Sr provenance dates of feldspar in the — 18 +35 mesh fractions of till range from 1.21 b.y. to 2.01 b.y. and confirm that the feldspar is a mixture of grains from these 2 provinces. The K-feldspar/plagioclase ratio of the — 18 +35 mesh fraction is consistently greater than that of the —120 +250 mesh fraction. This relationship also was seen in the till of the Powell Moraine of Ohio and in Cenozoic till of Antarctica and may be caused by preferential grinding of plagioclase during transport at the base of the ice. The feldspar in the — 18 +35 mesh fraction is enriched in K-feldspar by about 25% compared to feldspar in the — 120 +250 mesh fraction of till in the Cuba Moraine. Other/Unknown Material Antarc* Antarctica Ohio State University (OSU): Knowledge Bank Canada |
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Open Polar |
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Ohio State University (OSU): Knowledge Bank |
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ftohiostateu |
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English |
description |
Author Institution: Department of Geology and Mineralogy, The Ohio State University Late Wisconsin till of the Cuba Moraine in Ohio consists of sediment contributed by local Paleozoic bedrock and by the igneous and metamorphic rocks of the Canadian Precambrian Shield. Feldspar in this till is derived predominantly from the Grenville and Superior structural provinces of Canada which are 1.07 b.y. and 2.70 b.y. old, respectively. Rb-Sr provenance dates of feldspar in the — 18 +35 mesh fractions of till range from 1.21 b.y. to 2.01 b.y. and confirm that the feldspar is a mixture of grains from these 2 provinces. The K-feldspar/plagioclase ratio of the — 18 +35 mesh fraction is consistently greater than that of the —120 +250 mesh fraction. This relationship also was seen in the till of the Powell Moraine of Ohio and in Cenozoic till of Antarctica and may be caused by preferential grinding of plagioclase during transport at the base of the ice. The feldspar in the — 18 +35 mesh fraction is enriched in K-feldspar by about 25% compared to feldspar in the — 120 +250 mesh fraction of till in the Cuba Moraine. |
author |
Taylor, Karen S. Faure, Gunter |
spellingShingle |
Taylor, Karen S. Faure, Gunter Provenance Dates and Feldspar Fractionation in Late Wisconsin Till of the Cuba Moraine, Ohio |
author_facet |
Taylor, Karen S. Faure, Gunter |
author_sort |
Taylor, Karen S. |
title |
Provenance Dates and Feldspar Fractionation in Late Wisconsin Till of the Cuba Moraine, Ohio |
title_short |
Provenance Dates and Feldspar Fractionation in Late Wisconsin Till of the Cuba Moraine, Ohio |
title_full |
Provenance Dates and Feldspar Fractionation in Late Wisconsin Till of the Cuba Moraine, Ohio |
title_fullStr |
Provenance Dates and Feldspar Fractionation in Late Wisconsin Till of the Cuba Moraine, Ohio |
title_full_unstemmed |
Provenance Dates and Feldspar Fractionation in Late Wisconsin Till of the Cuba Moraine, Ohio |
title_sort |
provenance dates and feldspar fractionation in late wisconsin till of the cuba moraine, ohio |
publishDate |
1983 |
url |
http://hdl.handle.net/1811/22946 |
geographic |
Canada |
geographic_facet |
Canada |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_relation |
The Ohio Journal of Science. v83, n4 (September, 1983), 177-182 0030-0950 http://hdl.handle.net/1811/22946 |
_version_ |
1766275609599672320 |