SHORT COMMUNICATIONS 133
(Me75-83), aluminous diopside, green amphibole, colourless spinel, large poikilitic blue tourmaline, and a little calcite. Tourmaline includes everal minerals, especially clinopyroxene, spinel, and a few small crystals of serendibite. Scattered grains of the latter in one crystal of tourmaline are i...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.631.4842 2023-05-15T17:10:57+02:00 SHORT COMMUNICATIONS 133 The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.631.4842 http://www.minersoc.org/pages/Archive-MM/Volume_54/54-374-133.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.631.4842 http://www.minersoc.org/pages/Archive-MM/Volume_54/54-374-133.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.minersoc.org/pages/Archive-MM/Volume_54/54-374-133.pdf text ftciteseerx 2016-01-08T15:30:19Z (Me75-83), aluminous diopside, green amphibole, colourless spinel, large poikilitic blue tourmaline, and a little calcite. Tourmaline includes everal minerals, especially clinopyroxene, spinel, and a few small crystals of serendibite. Scattered grains of the latter in one crystal of tourmaline are in optical continuity, suggesting that tourmaline is a breakdown product after serendibite. The ser-endibite is colourless to very light green. The mineral is much less coloured than the prussian blue crystals in a calcsilicate rock associated with clintonite clinopyroxenites from Ianapera, in SW Madagascar (Nicollet, 1988, 1990). The Ihosy ser-endibite has low birefringence and fine polysyn-thetic twinning. It may be mistaken for sapphirine, but it is distinguishable from the latter by a larger extinction angle and by its occurrence in calcic rocks. The ferromagnesian minerals in the rock are magnesium rich. Tourmaline (Table 1) is a magnesian uvite and the XMg ratio of the spinel is greater than 0.9. Hornblende and clino-pyroxene are close to their Mg end-members (XMg~0.97). The Fe-Mg partitioning between tourmaline and serendibite (Kd) is ~0.4 as in the more iron rich pair from Ianapera; it is lower than the Ka of coexisting tourmaline and serendibite from Melville Peninsula, Canada (Kd=0.61: Hutcheon et al., 1977). The P-T conditions of the crystallization f this rock are similar to those estimated for the neigh-bouring seven-phase anatectic gneisses (Nicollet Text Melville Peninsula Unknown Canada Melville Peninsula ENVELOPE(-83.999,-83.999,68.001,68.001) |
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Open Polar |
collection |
Unknown |
op_collection_id |
ftciteseerx |
language |
English |
description |
(Me75-83), aluminous diopside, green amphibole, colourless spinel, large poikilitic blue tourmaline, and a little calcite. Tourmaline includes everal minerals, especially clinopyroxene, spinel, and a few small crystals of serendibite. Scattered grains of the latter in one crystal of tourmaline are in optical continuity, suggesting that tourmaline is a breakdown product after serendibite. The ser-endibite is colourless to very light green. The mineral is much less coloured than the prussian blue crystals in a calcsilicate rock associated with clintonite clinopyroxenites from Ianapera, in SW Madagascar (Nicollet, 1988, 1990). The Ihosy ser-endibite has low birefringence and fine polysyn-thetic twinning. It may be mistaken for sapphirine, but it is distinguishable from the latter by a larger extinction angle and by its occurrence in calcic rocks. The ferromagnesian minerals in the rock are magnesium rich. Tourmaline (Table 1) is a magnesian uvite and the XMg ratio of the spinel is greater than 0.9. Hornblende and clino-pyroxene are close to their Mg end-members (XMg~0.97). The Fe-Mg partitioning between tourmaline and serendibite (Kd) is ~0.4 as in the more iron rich pair from Ianapera; it is lower than the Ka of coexisting tourmaline and serendibite from Melville Peninsula, Canada (Kd=0.61: Hutcheon et al., 1977). The P-T conditions of the crystallization f this rock are similar to those estimated for the neigh-bouring seven-phase anatectic gneisses (Nicollet |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
title |
SHORT COMMUNICATIONS 133 |
spellingShingle |
SHORT COMMUNICATIONS 133 |
title_short |
SHORT COMMUNICATIONS 133 |
title_full |
SHORT COMMUNICATIONS 133 |
title_fullStr |
SHORT COMMUNICATIONS 133 |
title_full_unstemmed |
SHORT COMMUNICATIONS 133 |
title_sort |
short communications 133 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.631.4842 http://www.minersoc.org/pages/Archive-MM/Volume_54/54-374-133.pdf |
long_lat |
ENVELOPE(-83.999,-83.999,68.001,68.001) |
geographic |
Canada Melville Peninsula |
geographic_facet |
Canada Melville Peninsula |
genre |
Melville Peninsula |
genre_facet |
Melville Peninsula |
op_source |
http://www.minersoc.org/pages/Archive-MM/Volume_54/54-374-133.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.631.4842 http://www.minersoc.org/pages/Archive-MM/Volume_54/54-374-133.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766067620959748096 |