East Antarctic sediment carbonate mineralogy, 2020
Marine sediments often represent an important reservoir of carbonate minerals that will react rapidly to changing seawater chemistry as a result of ocean acidification. Ocean acidification (the reaction of CO2 with seawater) lowers the saturation state with respect to carbonate minerals and may lead...
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Online Access: | https://researchdata.edu.au/east-antarctic-sediment-mineralogy-2020/1675071 https://doi.org/10.26179/gy47-va91 https://data.aad.gov.au/metadata/records/AAS_4320_East_Antarctic_sediment_carbonate_mineralogy http://nla.gov.au/nla.party-617536 |
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ftands:oai:ands.org.au::1675071 2023-05-15T13:41:12+02:00 East Antarctic sediment carbonate mineralogy, 2020 POST, ALIX (hasPrincipalInvestigator) POST, ALIX (processor) SMITH, JODIE (hasPrincipalInvestigator) Australian Antarctic Data Centre (publisher) Spatial: northlimit=-64; southlimit=-69; westlimit=64; eastLimit=147; projection=WGS84 Temporal: From 2014-07-01 to 2020-06-30 https://researchdata.edu.au/east-antarctic-sediment-mineralogy-2020/1675071 https://doi.org/10.26179/gy47-va91 https://data.aad.gov.au/metadata/records/AAS_4320_East_Antarctic_sediment_carbonate_mineralogy http://nla.gov.au/nla.party-617536 unknown Australian Antarctic Data Centre https://researchdata.edu.au/east-antarctic-sediment-mineralogy-2020/1675071 0976569b-868a-4a7c-8232-296ea02b20f4 doi:10.26179/gy47-va91 AAS_4320_East_Antarctic_sediment_carbonate_mineralogy https://data.aad.gov.au/metadata/records/AAS_4320_East_Antarctic_sediment_carbonate_mineralogy http://nla.gov.au/nla.party-617536 Australian Antarctic Data Centre geoscientificInformation oceans WATER TEMPERATURE EARTH SCIENCE OCEAN TEMPERATURE MARINE SEDIMENTS CARBONATE OCEAN CHEMISTRY CARBONATE FORMATION SOLID EARTH GEOCHEMISTRY GEOCHEMICAL PROCESSES CALCITE OCEAN ACIDIFICATION HIGH-MAGNESIUM CALCITE XRD > X-ray Diffractometer LABORATORY CONTINENT > ANTARCTICA GEOGRAPHIC REGION > POLAR OCEAN > SOUTHERN OCEAN dataset ftands https://doi.org/10.26179/gy47-va91 2021-12-06T23:24:38Z Marine sediments often represent an important reservoir of carbonate minerals that will react rapidly to changing seawater chemistry as a result of ocean acidification. Ocean acidification (the reaction of CO2 with seawater) lowers the saturation state with respect to carbonate minerals and may lead to dissolution of these minerals if undersaturation occurs. There are three main carbonate minerals found in marine sediments: 1. aragonite 2. calcite (also referred to as low-magnesium calcite, containing less than 4mol% MgCO3) 3. high-magnesium calcite (greater than 4 mol% MgCO3) Due to the different structure of these minerals, they have different solubilities with high-Mg calcite the most soluble, followed by aragonite and then calcite. As seawater CO2 increases and the saturation state with respect to carbonate minerals decreases, high-Mg calcite will be the first mineral subject to undersaturation and dissolution. By measuring the carbonate mineral composition of sediments, we can determine which areas are most at risk from dissolution. This information forms an important baseline with which we can assess future climate change. The effect of ocean acidification on carbonates in marine sediments will occur around the world, but due to the lower seawater temperatures in Antarctica, solubility is much lower so the impacts will occur here first. This dataset is a compilation of carbonate mineralogy data from surface sediments collected from the East Antarctic margin. The dataset includes sample metadata, bulk carbonate content, %calcite, % aragonite and mol% MgCO3 (i.e. the magnesium content of high-Mg calcite). This dataset was compiled from new (up to 2020) and archived sediment samples that contacted sufficient carbonates (typically greater than 3% CaCO3)/ Dataset Antarc* Antarctic Antarctica Ocean acidification Southern Ocean Research Data Australia (Australian National Data Service - ANDS) Antarctic Southern Ocean ENVELOPE(64,147,-64,-69) |
institution |
Open Polar |
collection |
Research Data Australia (Australian National Data Service - ANDS) |
op_collection_id |
ftands |
language |
unknown |
topic |
geoscientificInformation oceans WATER TEMPERATURE EARTH SCIENCE OCEAN TEMPERATURE MARINE SEDIMENTS CARBONATE OCEAN CHEMISTRY CARBONATE FORMATION SOLID EARTH GEOCHEMISTRY GEOCHEMICAL PROCESSES CALCITE OCEAN ACIDIFICATION HIGH-MAGNESIUM CALCITE XRD > X-ray Diffractometer LABORATORY CONTINENT > ANTARCTICA GEOGRAPHIC REGION > POLAR OCEAN > SOUTHERN OCEAN |
spellingShingle |
geoscientificInformation oceans WATER TEMPERATURE EARTH SCIENCE OCEAN TEMPERATURE MARINE SEDIMENTS CARBONATE OCEAN CHEMISTRY CARBONATE FORMATION SOLID EARTH GEOCHEMISTRY GEOCHEMICAL PROCESSES CALCITE OCEAN ACIDIFICATION HIGH-MAGNESIUM CALCITE XRD > X-ray Diffractometer LABORATORY CONTINENT > ANTARCTICA GEOGRAPHIC REGION > POLAR OCEAN > SOUTHERN OCEAN East Antarctic sediment carbonate mineralogy, 2020 |
topic_facet |
geoscientificInformation oceans WATER TEMPERATURE EARTH SCIENCE OCEAN TEMPERATURE MARINE SEDIMENTS CARBONATE OCEAN CHEMISTRY CARBONATE FORMATION SOLID EARTH GEOCHEMISTRY GEOCHEMICAL PROCESSES CALCITE OCEAN ACIDIFICATION HIGH-MAGNESIUM CALCITE XRD > X-ray Diffractometer LABORATORY CONTINENT > ANTARCTICA GEOGRAPHIC REGION > POLAR OCEAN > SOUTHERN OCEAN |
description |
Marine sediments often represent an important reservoir of carbonate minerals that will react rapidly to changing seawater chemistry as a result of ocean acidification. Ocean acidification (the reaction of CO2 with seawater) lowers the saturation state with respect to carbonate minerals and may lead to dissolution of these minerals if undersaturation occurs. There are three main carbonate minerals found in marine sediments: 1. aragonite 2. calcite (also referred to as low-magnesium calcite, containing less than 4mol% MgCO3) 3. high-magnesium calcite (greater than 4 mol% MgCO3) Due to the different structure of these minerals, they have different solubilities with high-Mg calcite the most soluble, followed by aragonite and then calcite. As seawater CO2 increases and the saturation state with respect to carbonate minerals decreases, high-Mg calcite will be the first mineral subject to undersaturation and dissolution. By measuring the carbonate mineral composition of sediments, we can determine which areas are most at risk from dissolution. This information forms an important baseline with which we can assess future climate change. The effect of ocean acidification on carbonates in marine sediments will occur around the world, but due to the lower seawater temperatures in Antarctica, solubility is much lower so the impacts will occur here first. This dataset is a compilation of carbonate mineralogy data from surface sediments collected from the East Antarctic margin. The dataset includes sample metadata, bulk carbonate content, %calcite, % aragonite and mol% MgCO3 (i.e. the magnesium content of high-Mg calcite). This dataset was compiled from new (up to 2020) and archived sediment samples that contacted sufficient carbonates (typically greater than 3% CaCO3)/ |
author2 |
POST, ALIX (hasPrincipalInvestigator) POST, ALIX (processor) SMITH, JODIE (hasPrincipalInvestigator) Australian Antarctic Data Centre (publisher) |
format |
Dataset |
title |
East Antarctic sediment carbonate mineralogy, 2020 |
title_short |
East Antarctic sediment carbonate mineralogy, 2020 |
title_full |
East Antarctic sediment carbonate mineralogy, 2020 |
title_fullStr |
East Antarctic sediment carbonate mineralogy, 2020 |
title_full_unstemmed |
East Antarctic sediment carbonate mineralogy, 2020 |
title_sort |
east antarctic sediment carbonate mineralogy, 2020 |
publisher |
Australian Antarctic Data Centre |
url |
https://researchdata.edu.au/east-antarctic-sediment-mineralogy-2020/1675071 https://doi.org/10.26179/gy47-va91 https://data.aad.gov.au/metadata/records/AAS_4320_East_Antarctic_sediment_carbonate_mineralogy http://nla.gov.au/nla.party-617536 |
op_coverage |
Spatial: northlimit=-64; southlimit=-69; westlimit=64; eastLimit=147; projection=WGS84 Temporal: From 2014-07-01 to 2020-06-30 |
long_lat |
ENVELOPE(64,147,-64,-69) |
geographic |
Antarctic Southern Ocean |
geographic_facet |
Antarctic Southern Ocean |
genre |
Antarc* Antarctic Antarctica Ocean acidification Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica Ocean acidification Southern Ocean |
op_source |
Australian Antarctic Data Centre |
op_relation |
https://researchdata.edu.au/east-antarctic-sediment-mineralogy-2020/1675071 0976569b-868a-4a7c-8232-296ea02b20f4 doi:10.26179/gy47-va91 AAS_4320_East_Antarctic_sediment_carbonate_mineralogy https://data.aad.gov.au/metadata/records/AAS_4320_East_Antarctic_sediment_carbonate_mineralogy http://nla.gov.au/nla.party-617536 |
op_doi |
https://doi.org/10.26179/gy47-va91 |
_version_ |
1766147010372567040 |