Geochemistry of microtektites from Victoria Land Transantarctic Mountains
We extended the petrographic and geochemical dataset for the recently discovered Transantarctic Mountain microtektites in order to check our previous claim that they are related to the Australasian strewn field. Based on color and composition, the 465 microtektites so far identified include two grou...
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Format: | Dataset |
Language: | English |
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PANGAEA
2009
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Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.783473 https://doi.org/10.1594/PANGAEA.783473 |
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.783473 |
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Open Polar |
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PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
124-769A 184-1143A 22-213 Antarctic Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Frontier_Mountain Glomar Challenger HAND Indian Ocean//BASIN Joides Resolution Leg124 Leg184 Leg22 McMurdo Dry Valleys southern Victorica Land Antarctica Miller_Butte Mistake_Peak Mount_Aeolus Mount_Fleming Ocean Drilling Program ODP PC Pian_delle_Tectiti Piston corer RC08 RC08-52 Robert Conrad Sampling by hand South China Sea Sulu Sea Trap micrometeorite TRAPMET V28 V28-239 Vema |
spellingShingle |
124-769A 184-1143A 22-213 Antarctic Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Frontier_Mountain Glomar Challenger HAND Indian Ocean//BASIN Joides Resolution Leg124 Leg184 Leg22 McMurdo Dry Valleys southern Victorica Land Antarctica Miller_Butte Mistake_Peak Mount_Aeolus Mount_Fleming Ocean Drilling Program ODP PC Pian_delle_Tectiti Piston corer RC08 RC08-52 Robert Conrad Sampling by hand South China Sea Sulu Sea Trap micrometeorite TRAPMET V28 V28-239 Vema Folco, L D'Oratio, M Tiepolo, Massimo Tonarini, Sonia Ottolini, L Perchiazzi, N Rochette, Pierre Glass, B P Geochemistry of microtektites from Victoria Land Transantarctic Mountains |
topic_facet |
124-769A 184-1143A 22-213 Antarctic Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Frontier_Mountain Glomar Challenger HAND Indian Ocean//BASIN Joides Resolution Leg124 Leg184 Leg22 McMurdo Dry Valleys southern Victorica Land Antarctica Miller_Butte Mistake_Peak Mount_Aeolus Mount_Fleming Ocean Drilling Program ODP PC Pian_delle_Tectiti Piston corer RC08 RC08-52 Robert Conrad Sampling by hand South China Sea Sulu Sea Trap micrometeorite TRAPMET V28 V28-239 Vema |
description |
We extended the petrographic and geochemical dataset for the recently discovered Transantarctic Mountain microtektites in order to check our previous claim that they are related to the Australasian strewn field. Based on color and composition, the 465 microtektites so far identified include two groups of transparent glass spheres less than ca. 800 µm in diameter: the most abundant pale-yellow, or normal, microtektites, and the rare pale-green, or high-Mg, microtektites. The major element composition of normal microtektites determined through electron microprobe analysis is characterized by high contents of silica (SiO2 = 71.5 ± 3.6 (1 sigma) wt%) and alumina (Al2O3 = 15.5 ± 2.2 (1 sigma) wt%), low total alkali element contents (0.50-1.85 wt%), and MgO abundances <6 wt%. The high-Mg microtektites have a distinctly higher MgO content >10 wt%. Transantarctic Mountain microtektites contain rare silica-rich (up to 93 wt% SiO2) glassy inclusions similar to those found in two Australasian microtektites analyzed here for comparison. These inclusions are interpreted as partially digested, lechatelierite-like inclusions typically found in tektites and microtektites. The major and trace element (by laser ablation - inductively coupled plasma - mass spectrometry) abundance pattern of the Transantarctic Mountain microtektites matches the average upper continental crust composition for most elements. Major deviations include a strong to moderate depletion in volatile elements including Pb, Zn, Na, K, Rb, Sr and Cs, as a likely result of severe volatile loss during the high temperature melting and vaporization of crustal target rocks. The normal and high-Mg Transantarctic Mountain microtektites have compositions similar to the most volatile-poor normal and high-Mg Australasian microtektites reported in the literature. Their very low H2O and B contents (by secondary ion mass spectrometry) of 85 ± 58 (1 sigma) ?g/g and 0.53 ± 0.21 ?g/g, respectively, evidence the extreme volatile loss characteristically observed in ... |
format |
Dataset |
author |
Folco, L D'Oratio, M Tiepolo, Massimo Tonarini, Sonia Ottolini, L Perchiazzi, N Rochette, Pierre Glass, B P |
author_facet |
Folco, L D'Oratio, M Tiepolo, Massimo Tonarini, Sonia Ottolini, L Perchiazzi, N Rochette, Pierre Glass, B P |
author_sort |
Folco, L |
title |
Geochemistry of microtektites from Victoria Land Transantarctic Mountains |
title_short |
Geochemistry of microtektites from Victoria Land Transantarctic Mountains |
title_full |
Geochemistry of microtektites from Victoria Land Transantarctic Mountains |
title_fullStr |
Geochemistry of microtektites from Victoria Land Transantarctic Mountains |
title_full_unstemmed |
Geochemistry of microtektites from Victoria Land Transantarctic Mountains |
title_sort |
geochemistry of microtektites from victoria land transantarctic mountains |
publisher |
PANGAEA |
publishDate |
2009 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.783473 https://doi.org/10.1594/PANGAEA.783473 |
op_coverage |
MEDIAN LATITUDE: -56.948106 * MEDIAN LONGITUDE: 150.435577 * SOUTH-BOUND LATITUDE: -77.550000 * WEST-BOUND LONGITUDE: 93.896200 * NORTH-BOUND LATITUDE: 9.361980 * EAST-BOUND LONGITUDE: 162.239600 * DATE/TIME START: 1964-01-28T00:00:00 * DATE/TIME END: 1999-03-06T23:45:00 |
long_lat |
ENVELOPE(93.896200,162.239600,9.361980,-77.550000) |
geographic |
Antarctic Victoria Land McMurdo Dry Valleys Transantarctic Mountains Indian |
geographic_facet |
Antarctic Victoria Land McMurdo Dry Valleys Transantarctic Mountains Indian |
genre |
Antarc* Antarctic Antarctica McMurdo Dry Valleys Victoria Land |
genre_facet |
Antarc* Antarctic Antarctica McMurdo Dry Valleys Victoria Land |
op_source |
Supplement to: Folco, L; D'Oratio, M; Tiepolo, Massimo; Tonarini, Sonia; Ottolini, L; Perchiazzi, N; Rochette, Pierre; Glass, B P (2009): Transantarctic Mountain microtektites: Geochemical affinity with Australasian microtektites. Geochimica et Cosmochimica Acta, 73(12), 3694-3722, https://doi.org/10.1016/j.gca.2009.03.021 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.783473 https://doi.org/10.1594/PANGAEA.783473 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.783473 https://doi.org/10.1016/j.gca.2009.03.021 |
_version_ |
1766164254174478336 |
spelling |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.783473 2023-05-15T13:42:10+02:00 Geochemistry of microtektites from Victoria Land Transantarctic Mountains Folco, L D'Oratio, M Tiepolo, Massimo Tonarini, Sonia Ottolini, L Perchiazzi, N Rochette, Pierre Glass, B P MEDIAN LATITUDE: -56.948106 * MEDIAN LONGITUDE: 150.435577 * SOUTH-BOUND LATITUDE: -77.550000 * WEST-BOUND LONGITUDE: 93.896200 * NORTH-BOUND LATITUDE: 9.361980 * EAST-BOUND LONGITUDE: 162.239600 * DATE/TIME START: 1964-01-28T00:00:00 * DATE/TIME END: 1999-03-06T23:45:00 2009-06-01 application/zip, 7 datasets https://doi.pangaea.de/10.1594/PANGAEA.783473 https://doi.org/10.1594/PANGAEA.783473 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.783473 https://doi.org/10.1594/PANGAEA.783473 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Folco, L; D'Oratio, M; Tiepolo, Massimo; Tonarini, Sonia; Ottolini, L; Perchiazzi, N; Rochette, Pierre; Glass, B P (2009): Transantarctic Mountain microtektites: Geochemical affinity with Australasian microtektites. Geochimica et Cosmochimica Acta, 73(12), 3694-3722, https://doi.org/10.1016/j.gca.2009.03.021 124-769A 184-1143A 22-213 Antarctic Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Frontier_Mountain Glomar Challenger HAND Indian Ocean//BASIN Joides Resolution Leg124 Leg184 Leg22 McMurdo Dry Valleys southern Victorica Land Antarctica Miller_Butte Mistake_Peak Mount_Aeolus Mount_Fleming Ocean Drilling Program ODP PC Pian_delle_Tectiti Piston corer RC08 RC08-52 Robert Conrad Sampling by hand South China Sea Sulu Sea Trap micrometeorite TRAPMET V28 V28-239 Vema Dataset 2009 ftpangaea https://doi.org/10.1594/PANGAEA.783473 https://doi.org/10.1016/j.gca.2009.03.021 2023-01-20T07:32:34Z We extended the petrographic and geochemical dataset for the recently discovered Transantarctic Mountain microtektites in order to check our previous claim that they are related to the Australasian strewn field. Based on color and composition, the 465 microtektites so far identified include two groups of transparent glass spheres less than ca. 800 µm in diameter: the most abundant pale-yellow, or normal, microtektites, and the rare pale-green, or high-Mg, microtektites. The major element composition of normal microtektites determined through electron microprobe analysis is characterized by high contents of silica (SiO2 = 71.5 ± 3.6 (1 sigma) wt%) and alumina (Al2O3 = 15.5 ± 2.2 (1 sigma) wt%), low total alkali element contents (0.50-1.85 wt%), and MgO abundances <6 wt%. The high-Mg microtektites have a distinctly higher MgO content >10 wt%. Transantarctic Mountain microtektites contain rare silica-rich (up to 93 wt% SiO2) glassy inclusions similar to those found in two Australasian microtektites analyzed here for comparison. These inclusions are interpreted as partially digested, lechatelierite-like inclusions typically found in tektites and microtektites. The major and trace element (by laser ablation - inductively coupled plasma - mass spectrometry) abundance pattern of the Transantarctic Mountain microtektites matches the average upper continental crust composition for most elements. Major deviations include a strong to moderate depletion in volatile elements including Pb, Zn, Na, K, Rb, Sr and Cs, as a likely result of severe volatile loss during the high temperature melting and vaporization of crustal target rocks. The normal and high-Mg Transantarctic Mountain microtektites have compositions similar to the most volatile-poor normal and high-Mg Australasian microtektites reported in the literature. Their very low H2O and B contents (by secondary ion mass spectrometry) of 85 ± 58 (1 sigma) ?g/g and 0.53 ± 0.21 ?g/g, respectively, evidence the extreme volatile loss characteristically observed in ... Dataset Antarc* Antarctic Antarctica McMurdo Dry Valleys Victoria Land PANGAEA - Data Publisher for Earth & Environmental Science Antarctic Victoria Land McMurdo Dry Valleys Transantarctic Mountains Indian ENVELOPE(93.896200,162.239600,9.361980,-77.550000) |