(Table T1) Magnetic properties of MORB from ODP Leg 187 sites
The core samples of mid-ocean-ridge basalts (including Indian and Pacific type) recovered from the Southeast Indian Ridge (SEIR) area near the Australian Antarctic Discordance during Ocean Drilling Program Leg 187 were studied using rock magnetism, mineralogy, and petrography methods. On the basis o...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.780754 2023-05-15T13:55:15+02:00 (Table T1) Magnetic properties of MORB from ODP Leg 187 sites Shau, Yen-Hong Torii, Masayuki Horng, Chorng-Shern Liang, Wen-Tzong MEDIAN LATITUDE: -43.392231 * MEDIAN LONGITUDE: 129.132310 * SOUTH-BOUND LATITUDE: -45.956700 * WEST-BOUND LONGITUDE: 126.908300 * NORTH-BOUND LATITUDE: -41.271510 * EAST-BOUND LONGITUDE: 134.998350 * DATE/TIME START: 1999-08-12T23:30:00 * DATE/TIME END: 2000-01-06T09:00:00 * MINIMUM ELEVATION: -5736.4 m * MAXIMUM ELEVATION: -4354.0 m 2004-05-10 text/tab-separated-values, 1411 data points https://doi.pangaea.de/10.1594/PANGAEA.780754 https://doi.org/10.1594/PANGAEA.780754 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.780754 https://doi.org/10.1594/PANGAEA.780754 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Shau, Yen-Hong; Torii, Masayuki; Horng, Chorng-Shern; Liang, Wen-Tzong (2004): Magnetic properties of mid-ocean-ridge basalts from Ocean Drilling Program Leg 187. In: Pedersen, RB; Christie, DM; Miller, DJ (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 187, 1-25, https://doi.org/10.2973/odp.proc.sr.187.204.2004 187-1152A 187-1152B 187-1153A 187-1154A 187-1155A 187-1155B 187-1156A 187-1156B 187-1157A 187-1157B 187-1158A 187-1158B 187-1158C 187-1159A 187-1160A 187-1160B 187-1161A 187-1161B 187-1162A 187-1162B 187-1163A 187-1164A 187-1164B Bartington MS2 magnetic susceptibility meter Coercive force Coercivity of remanence Coercivity of remanence/coercive force Curie temperature Depth relative DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Event label Hysteresis saturation magnetization per unit volume saturation magnetization/ saturation remanence saturation remanence Indian Ocean Joides Resolution Leg187 MAG Magnetic susceptibility volume Magnetometer Dataset 2004 ftpangaea https://doi.org/10.1594/PANGAEA.780754 https://doi.org/10.2973/odp.proc.sr.187.204.2004 2023-01-20T08:53:55Z The core samples of mid-ocean-ridge basalts (including Indian and Pacific type) recovered from the Southeast Indian Ridge (SEIR) area near the Australian Antarctic Discordance during Ocean Drilling Program Leg 187 were studied using rock magnetism, mineralogy, and petrography methods. On the basis of thermomagnetic analyses and low-temperature magnetometry, the dominant magnetic carrier in most of the basalt samples (pillow basalts) is characterized as titanomaghemite, which presumably formed by low-temperature oxidation of primary titanomagnetite. Some samples from unaltered massive basalts contain nearly unoxidized titanomagnetite as the main magnetic mineral. A metadiabase sample showing greenschist facies metamorphism contains magnetic minerals dominated by magnetite. The pillow basalts contain titanomaghemite ranging from stable single-domain to pseudosingle-domain (PSD) grains, and the majority are characterized by a single stable component of remanence. The massive basalts show hysteresis features of larger PSD grains and contain a very low coercivity remanence. The values of natural remanent magnetization (NRM) of the samples in this SEIR area are on the same order as those of other oceanic ridge basalts. They show a general decreasing trend of NRM with increasing crust age. However, the values of NRM show no correlation either with the tectonic zonations (Zone A vs. Zone B) or with the mantle provinces (Pacific vs. Indian types). Dataset Antarc* Antarctic PANGAEA - Data Publisher for Earth & Environmental Science Antarctic Pacific Indian Southeast Indian Ridge ENVELOPE(110.000,110.000,-50.000,-50.000) Australian-Antarctic Discordance ENVELOPE(124.000,124.000,-49.000,-49.000) ENVELOPE(126.908300,134.998350,-41.271510,-45.956700) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
187-1152A 187-1152B 187-1153A 187-1154A 187-1155A 187-1155B 187-1156A 187-1156B 187-1157A 187-1157B 187-1158A 187-1158B 187-1158C 187-1159A 187-1160A 187-1160B 187-1161A 187-1161B 187-1162A 187-1162B 187-1163A 187-1164A 187-1164B Bartington MS2 magnetic susceptibility meter Coercive force Coercivity of remanence Coercivity of remanence/coercive force Curie temperature Depth relative DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Event label Hysteresis saturation magnetization per unit volume saturation magnetization/ saturation remanence saturation remanence Indian Ocean Joides Resolution Leg187 MAG Magnetic susceptibility volume Magnetometer |
spellingShingle |
187-1152A 187-1152B 187-1153A 187-1154A 187-1155A 187-1155B 187-1156A 187-1156B 187-1157A 187-1157B 187-1158A 187-1158B 187-1158C 187-1159A 187-1160A 187-1160B 187-1161A 187-1161B 187-1162A 187-1162B 187-1163A 187-1164A 187-1164B Bartington MS2 magnetic susceptibility meter Coercive force Coercivity of remanence Coercivity of remanence/coercive force Curie temperature Depth relative DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Event label Hysteresis saturation magnetization per unit volume saturation magnetization/ saturation remanence saturation remanence Indian Ocean Joides Resolution Leg187 MAG Magnetic susceptibility volume Magnetometer Shau, Yen-Hong Torii, Masayuki Horng, Chorng-Shern Liang, Wen-Tzong (Table T1) Magnetic properties of MORB from ODP Leg 187 sites |
topic_facet |
187-1152A 187-1152B 187-1153A 187-1154A 187-1155A 187-1155B 187-1156A 187-1156B 187-1157A 187-1157B 187-1158A 187-1158B 187-1158C 187-1159A 187-1160A 187-1160B 187-1161A 187-1161B 187-1162A 187-1162B 187-1163A 187-1164A 187-1164B Bartington MS2 magnetic susceptibility meter Coercive force Coercivity of remanence Coercivity of remanence/coercive force Curie temperature Depth relative DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Event label Hysteresis saturation magnetization per unit volume saturation magnetization/ saturation remanence saturation remanence Indian Ocean Joides Resolution Leg187 MAG Magnetic susceptibility volume Magnetometer |
description |
The core samples of mid-ocean-ridge basalts (including Indian and Pacific type) recovered from the Southeast Indian Ridge (SEIR) area near the Australian Antarctic Discordance during Ocean Drilling Program Leg 187 were studied using rock magnetism, mineralogy, and petrography methods. On the basis of thermomagnetic analyses and low-temperature magnetometry, the dominant magnetic carrier in most of the basalt samples (pillow basalts) is characterized as titanomaghemite, which presumably formed by low-temperature oxidation of primary titanomagnetite. Some samples from unaltered massive basalts contain nearly unoxidized titanomagnetite as the main magnetic mineral. A metadiabase sample showing greenschist facies metamorphism contains magnetic minerals dominated by magnetite. The pillow basalts contain titanomaghemite ranging from stable single-domain to pseudosingle-domain (PSD) grains, and the majority are characterized by a single stable component of remanence. The massive basalts show hysteresis features of larger PSD grains and contain a very low coercivity remanence. The values of natural remanent magnetization (NRM) of the samples in this SEIR area are on the same order as those of other oceanic ridge basalts. They show a general decreasing trend of NRM with increasing crust age. However, the values of NRM show no correlation either with the tectonic zonations (Zone A vs. Zone B) or with the mantle provinces (Pacific vs. Indian types). |
format |
Dataset |
author |
Shau, Yen-Hong Torii, Masayuki Horng, Chorng-Shern Liang, Wen-Tzong |
author_facet |
Shau, Yen-Hong Torii, Masayuki Horng, Chorng-Shern Liang, Wen-Tzong |
author_sort |
Shau, Yen-Hong |
title |
(Table T1) Magnetic properties of MORB from ODP Leg 187 sites |
title_short |
(Table T1) Magnetic properties of MORB from ODP Leg 187 sites |
title_full |
(Table T1) Magnetic properties of MORB from ODP Leg 187 sites |
title_fullStr |
(Table T1) Magnetic properties of MORB from ODP Leg 187 sites |
title_full_unstemmed |
(Table T1) Magnetic properties of MORB from ODP Leg 187 sites |
title_sort |
(table t1) magnetic properties of morb from odp leg 187 sites |
publisher |
PANGAEA |
publishDate |
2004 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.780754 https://doi.org/10.1594/PANGAEA.780754 |
op_coverage |
MEDIAN LATITUDE: -43.392231 * MEDIAN LONGITUDE: 129.132310 * SOUTH-BOUND LATITUDE: -45.956700 * WEST-BOUND LONGITUDE: 126.908300 * NORTH-BOUND LATITUDE: -41.271510 * EAST-BOUND LONGITUDE: 134.998350 * DATE/TIME START: 1999-08-12T23:30:00 * DATE/TIME END: 2000-01-06T09:00:00 * MINIMUM ELEVATION: -5736.4 m * MAXIMUM ELEVATION: -4354.0 m |
long_lat |
ENVELOPE(110.000,110.000,-50.000,-50.000) ENVELOPE(124.000,124.000,-49.000,-49.000) ENVELOPE(126.908300,134.998350,-41.271510,-45.956700) |
geographic |
Antarctic Pacific Indian Southeast Indian Ridge Australian-Antarctic Discordance |
geographic_facet |
Antarctic Pacific Indian Southeast Indian Ridge Australian-Antarctic Discordance |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Supplement to: Shau, Yen-Hong; Torii, Masayuki; Horng, Chorng-Shern; Liang, Wen-Tzong (2004): Magnetic properties of mid-ocean-ridge basalts from Ocean Drilling Program Leg 187. In: Pedersen, RB; Christie, DM; Miller, DJ (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 187, 1-25, https://doi.org/10.2973/odp.proc.sr.187.204.2004 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.780754 https://doi.org/10.1594/PANGAEA.780754 |
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.780754 https://doi.org/10.2973/odp.proc.sr.187.204.2004 |
_version_ |
1766261606310739968 |