Preliminary study of the sandstones in the Torlesse terrane, New Zealand(MEMORIAL VOLUME TO THE LATE PROFESSOR TERUHIKO SAMESHIMA)
Heavy fractions of minerals in the sandstones from the Torlesse terrane are composed mainly of metamorphic minerals such as epidote, titanite and pumpellyite with subordinate amounts of detrital minerals such as zircon, garnet, apatite and ilmenite. Although metamorphism has been considered to be co...
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ftshizuoka:oai:shizuoka.repo.nii.ac.jp:00000387 2023-05-15T13:33:31+02:00 Preliminary study of the sandstones in the Torlesse terrane, New Zealand(MEMORIAL VOLUME TO THE LATE PROFESSOR TERUHIKO SAMESHIMA) Yokoyama Kazumi 1994-03 application/pdf http://hdl.handle.net/10297/329 https://shizuoka.repo.nii.ac.jp/?action=repository_uri&item_id=387 en eng Shizuoka University. Institute of Geosciences 110000413347 AN00103190 https://shizuoka.repo.nii.ac.jp/?action=repository_uri&item_id=387 http://hdl.handle.net/10297/329 Geoscience reports of Shizuoka University, 20, 63-70(1994-03) 03886298 sandstone heavy mineral Torlesse terrane New Zealand 458 Departmental Bulletin Paper 1994 ftshizuoka 2023-03-26T20:22:17Z Heavy fractions of minerals in the sandstones from the Torlesse terrane are composed mainly of metamorphic minerals such as epidote, titanite and pumpellyite with subordinate amounts of detrital minerals such as zircon, garnet, apatite and ilmenite. Although metamorphism has been considered to be continuous within the Torlesse terrane, modal proportions of metamorphic minerals, especially pumpellyite and epidote, are depleted in the centreil region. Compositions of detrital garnets vary consistently with the geological age of their host sandstones. Jurassic-Cretaceous sandstones contain garnets with a wide compositional range, whereas garnets in Triassic rocks have a narrow compositional range. Rocks of both ages contain Mg-rich and Ca-rich garnets, whereas Permian gar-nets are usually rich in Mn. Although dissolution of garnets is common in the sandstones due to diagenesis and metamorphism, the difference of the garnet com-position reflects compositional differences in the source rocks. Garnets in the Permian rocks were predominantly derived from granitic rocks, whereas those in the Triassic to Cretaceous rocks were derived from garnet amphibolite and gneiss which should be lower in metamorphic grade than metamorphic rocks in the eastern Antarctic. publisher Report Antarc* Antarctic SURE: Shizuoka University REpository Antarctic Gar’ ENVELOPE(162.014,162.014,57.140,57.140) New Zealand |
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collection |
SURE: Shizuoka University REpository |
op_collection_id |
ftshizuoka |
language |
English |
topic |
sandstone heavy mineral Torlesse terrane New Zealand 458 |
spellingShingle |
sandstone heavy mineral Torlesse terrane New Zealand 458 Yokoyama Kazumi Preliminary study of the sandstones in the Torlesse terrane, New Zealand(MEMORIAL VOLUME TO THE LATE PROFESSOR TERUHIKO SAMESHIMA) |
topic_facet |
sandstone heavy mineral Torlesse terrane New Zealand 458 |
description |
Heavy fractions of minerals in the sandstones from the Torlesse terrane are composed mainly of metamorphic minerals such as epidote, titanite and pumpellyite with subordinate amounts of detrital minerals such as zircon, garnet, apatite and ilmenite. Although metamorphism has been considered to be continuous within the Torlesse terrane, modal proportions of metamorphic minerals, especially pumpellyite and epidote, are depleted in the centreil region. Compositions of detrital garnets vary consistently with the geological age of their host sandstones. Jurassic-Cretaceous sandstones contain garnets with a wide compositional range, whereas garnets in Triassic rocks have a narrow compositional range. Rocks of both ages contain Mg-rich and Ca-rich garnets, whereas Permian gar-nets are usually rich in Mn. Although dissolution of garnets is common in the sandstones due to diagenesis and metamorphism, the difference of the garnet com-position reflects compositional differences in the source rocks. Garnets in the Permian rocks were predominantly derived from granitic rocks, whereas those in the Triassic to Cretaceous rocks were derived from garnet amphibolite and gneiss which should be lower in metamorphic grade than metamorphic rocks in the eastern Antarctic. publisher |
format |
Report |
author |
Yokoyama Kazumi |
author_facet |
Yokoyama Kazumi |
author_sort |
Yokoyama Kazumi |
title |
Preliminary study of the sandstones in the Torlesse terrane, New Zealand(MEMORIAL VOLUME TO THE LATE PROFESSOR TERUHIKO SAMESHIMA) |
title_short |
Preliminary study of the sandstones in the Torlesse terrane, New Zealand(MEMORIAL VOLUME TO THE LATE PROFESSOR TERUHIKO SAMESHIMA) |
title_full |
Preliminary study of the sandstones in the Torlesse terrane, New Zealand(MEMORIAL VOLUME TO THE LATE PROFESSOR TERUHIKO SAMESHIMA) |
title_fullStr |
Preliminary study of the sandstones in the Torlesse terrane, New Zealand(MEMORIAL VOLUME TO THE LATE PROFESSOR TERUHIKO SAMESHIMA) |
title_full_unstemmed |
Preliminary study of the sandstones in the Torlesse terrane, New Zealand(MEMORIAL VOLUME TO THE LATE PROFESSOR TERUHIKO SAMESHIMA) |
title_sort |
preliminary study of the sandstones in the torlesse terrane, new zealand(memorial volume to the late professor teruhiko sameshima) |
publisher |
Shizuoka University. Institute of Geosciences |
publishDate |
1994 |
url |
http://hdl.handle.net/10297/329 https://shizuoka.repo.nii.ac.jp/?action=repository_uri&item_id=387 |
long_lat |
ENVELOPE(162.014,162.014,57.140,57.140) |
geographic |
Antarctic Gar’ New Zealand |
geographic_facet |
Antarctic Gar’ New Zealand |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
110000413347 AN00103190 https://shizuoka.repo.nii.ac.jp/?action=repository_uri&item_id=387 http://hdl.handle.net/10297/329 Geoscience reports of Shizuoka University, 20, 63-70(1994-03) 03886298 |
_version_ |
1766043068410101760 |