Major and trace element content of the 17 lithostratigraphic units recovered during DSDP Leg 49 (Table 1)
IPOD Leg 49 recovered basalts from 9 holes at 7 sites along 3 transects across the Mid-Atlantic Ridge: 63°N (Reykjanes), 45°N and 36°N (FAMOUS area). This has provided further information on the nature of mantle heterogeneity in the North Atlantic by enabling studies to be made of the variation of b...
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Format: | Dataset |
Language: | English |
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PANGAEA
1979
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Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.710759 https://doi.org/10.1594/PANGAEA.710759 |
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.710759 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
49-407 49-408 49-409 49-410 49-410A 49-411 49-412A 49-413 Aluminium oxide Caesium Calcium oxide Carbon dioxide Cerium Chromium Cobalt Deep Sea Drilling Project DRILL Drilling/drill rig DSDP DSDP/ODP/IODP sample designation Elevation of event Europium Event label Gadolinium Glomar Challenger Hafnium Instrumental neutron activation analysis (INAA) (Reimann et al. 1998) Iron oxide Fe2O3 FeO Lanthanum Latitude of event Leg49 Longitude of event Lutetium Magnesium number Magnesium oxide Manganese oxide Neodymium Nickel Niobium North Atlantic/BASIN North Atlantic/FRACTURE ZONE North Atlantic/RIDGE Phosphorus oxide Potassium oxide Rubidium Samarium |
spellingShingle |
49-407 49-408 49-409 49-410 49-410A 49-411 49-412A 49-413 Aluminium oxide Caesium Calcium oxide Carbon dioxide Cerium Chromium Cobalt Deep Sea Drilling Project DRILL Drilling/drill rig DSDP DSDP/ODP/IODP sample designation Elevation of event Europium Event label Gadolinium Glomar Challenger Hafnium Instrumental neutron activation analysis (INAA) (Reimann et al. 1998) Iron oxide Fe2O3 FeO Lanthanum Latitude of event Leg49 Longitude of event Lutetium Magnesium number Magnesium oxide Manganese oxide Neodymium Nickel Niobium North Atlantic/BASIN North Atlantic/FRACTURE ZONE North Atlantic/RIDGE Phosphorus oxide Potassium oxide Rubidium Samarium Tarney, J Saunders, Andrew D Bougault, Henri Joron, Jean Louis Treuil, M Cann, Joe R Major and trace element content of the 17 lithostratigraphic units recovered during DSDP Leg 49 (Table 1) |
topic_facet |
49-407 49-408 49-409 49-410 49-410A 49-411 49-412A 49-413 Aluminium oxide Caesium Calcium oxide Carbon dioxide Cerium Chromium Cobalt Deep Sea Drilling Project DRILL Drilling/drill rig DSDP DSDP/ODP/IODP sample designation Elevation of event Europium Event label Gadolinium Glomar Challenger Hafnium Instrumental neutron activation analysis (INAA) (Reimann et al. 1998) Iron oxide Fe2O3 FeO Lanthanum Latitude of event Leg49 Longitude of event Lutetium Magnesium number Magnesium oxide Manganese oxide Neodymium Nickel Niobium North Atlantic/BASIN North Atlantic/FRACTURE ZONE North Atlantic/RIDGE Phosphorus oxide Potassium oxide Rubidium Samarium |
description |
IPOD Leg 49 recovered basalts from 9 holes at 7 sites along 3 transects across the Mid-Atlantic Ridge: 63°N (Reykjanes), 45°N and 36°N (FAMOUS area). This has provided further information on the nature of mantle heterogeneity in the North Atlantic by enabling studies to be made of the variation of basalt composition with depth and with time near critical areas (Iceland and the Azores) where deep mantle plumes are thought to exist. Over 150 samples have been analysed for up to 40 major and trace elements and the results used to place constraints on the petrogenesis of the erupted basalts and hence on the geochemical nature of their source regions. It is apparent that few of the recovered basalts have the geochemical characteristics of typical "depleted" midocean ridge basalts (MORB). An unusually wide range of basalt compositions may be erupted at a single site: the range of rare earth patterns within the short section cored at Site 413, for instance, encompasses the total variation of REE patterns previously reported from the FAMOUS area. Nevertheless it is possible to account for most of the compositional variation at a single site by partial melting processes (including dynamic melting) and fractional crystallization. Partial melting mechanisms seem to be the dominant processes relating basalt compositions, particularly at 36°N and 45°N, suggesting that long-lived sub-axial magma chambers may not be a consistent feature of the slow-spreading Mid-Atlantic Ridge. Comparisons of basalts erupted at the same ridge segment for periods of the order of 35 m.y. (now lying along the same mantle flow line) do show some significant inter-site differences in Rb/Sr, Ce/Yb, 87Sr/86Sr, etc., which cannot be accounted for by fractionation mechanisms and which must reflect heterogeneities in the mantle source. However when hygromagmatophile (HYG) trace element levels and ratios are considered, it is the constancy or consistency of these HYG ratios which is the more remarkable, implying that the mantle source feeding a ... |
format |
Dataset |
author |
Tarney, J Saunders, Andrew D Bougault, Henri Joron, Jean Louis Treuil, M Cann, Joe R |
author_facet |
Tarney, J Saunders, Andrew D Bougault, Henri Joron, Jean Louis Treuil, M Cann, Joe R |
author_sort |
Tarney, J |
title |
Major and trace element content of the 17 lithostratigraphic units recovered during DSDP Leg 49 (Table 1) |
title_short |
Major and trace element content of the 17 lithostratigraphic units recovered during DSDP Leg 49 (Table 1) |
title_full |
Major and trace element content of the 17 lithostratigraphic units recovered during DSDP Leg 49 (Table 1) |
title_fullStr |
Major and trace element content of the 17 lithostratigraphic units recovered during DSDP Leg 49 (Table 1) |
title_full_unstemmed |
Major and trace element content of the 17 lithostratigraphic units recovered during DSDP Leg 49 (Table 1) |
title_sort |
major and trace element content of the 17 lithostratigraphic units recovered during dsdp leg 49 (table 1) |
publisher |
PANGAEA |
publishDate |
1979 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.710759 https://doi.org/10.1594/PANGAEA.710759 |
op_coverage |
MEDIAN LATITUDE: 48.852688 * MEDIAN LONGITUDE: -30.515238 * SOUTH-BOUND LATITUDE: 36.543200 * WEST-BOUND LONGITUDE: -33.388300 * NORTH-BOUND LATITUDE: 63.938700 * EAST-BOUND LONGITUDE: -25.952800 * DATE/TIME START: 1976-07-23T00:00:00 * DATE/TIME END: 1976-08-28T00:00:00 * MINIMUM ELEVATION: -2977.0 m * MAXIMUM ELEVATION: -832.0 m |
long_lat |
ENVELOPE(-22.250,-22.250,65.467,65.467) ENVELOPE(-33.388300,-25.952800,63.938700,36.543200) |
geographic |
Mid-Atlantic Ridge Reykjanes |
geographic_facet |
Mid-Atlantic Ridge Reykjanes |
genre |
Iceland North Atlantic |
genre_facet |
Iceland North Atlantic |
op_source |
Supplement to: Wood, D A; Tarney, J; Varet, J; Saunders, Andrew D; Bougault, Henri; Joron, Jean Louis; Treuil, M; Cann, Joe R (1979): Geochemistry of basalts drilled in the North Atlantic by IPOD Leg 49: implications for mantel heterogeneity. Earth and Planetary Science Letters, 42(1), 77-97, https://doi.org/10.1016/0012-821X(79)90192-4 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.710759 https://doi.org/10.1594/PANGAEA.710759 |
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.710759 https://doi.org/10.1016/0012-821X(79)90192-4 |
_version_ |
1766043707044265984 |
spelling |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.710759 2023-05-15T16:53:12+02:00 Major and trace element content of the 17 lithostratigraphic units recovered during DSDP Leg 49 (Table 1) Tarney, J Saunders, Andrew D Bougault, Henri Joron, Jean Louis Treuil, M Cann, Joe R MEDIAN LATITUDE: 48.852688 * MEDIAN LONGITUDE: -30.515238 * SOUTH-BOUND LATITUDE: 36.543200 * WEST-BOUND LONGITUDE: -33.388300 * NORTH-BOUND LATITUDE: 63.938700 * EAST-BOUND LONGITUDE: -25.952800 * DATE/TIME START: 1976-07-23T00:00:00 * DATE/TIME END: 1976-08-28T00:00:00 * MINIMUM ELEVATION: -2977.0 m * MAXIMUM ELEVATION: -832.0 m 1979-12-17 text/tab-separated-values, 722 data points https://doi.pangaea.de/10.1594/PANGAEA.710759 https://doi.org/10.1594/PANGAEA.710759 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.710759 https://doi.org/10.1594/PANGAEA.710759 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Wood, D A; Tarney, J; Varet, J; Saunders, Andrew D; Bougault, Henri; Joron, Jean Louis; Treuil, M; Cann, Joe R (1979): Geochemistry of basalts drilled in the North Atlantic by IPOD Leg 49: implications for mantel heterogeneity. Earth and Planetary Science Letters, 42(1), 77-97, https://doi.org/10.1016/0012-821X(79)90192-4 49-407 49-408 49-409 49-410 49-410A 49-411 49-412A 49-413 Aluminium oxide Caesium Calcium oxide Carbon dioxide Cerium Chromium Cobalt Deep Sea Drilling Project DRILL Drilling/drill rig DSDP DSDP/ODP/IODP sample designation Elevation of event Europium Event label Gadolinium Glomar Challenger Hafnium Instrumental neutron activation analysis (INAA) (Reimann et al. 1998) Iron oxide Fe2O3 FeO Lanthanum Latitude of event Leg49 Longitude of event Lutetium Magnesium number Magnesium oxide Manganese oxide Neodymium Nickel Niobium North Atlantic/BASIN North Atlantic/FRACTURE ZONE North Atlantic/RIDGE Phosphorus oxide Potassium oxide Rubidium Samarium Dataset 1979 ftpangaea https://doi.org/10.1594/PANGAEA.710759 https://doi.org/10.1016/0012-821X(79)90192-4 2023-01-20T08:47:03Z IPOD Leg 49 recovered basalts from 9 holes at 7 sites along 3 transects across the Mid-Atlantic Ridge: 63°N (Reykjanes), 45°N and 36°N (FAMOUS area). This has provided further information on the nature of mantle heterogeneity in the North Atlantic by enabling studies to be made of the variation of basalt composition with depth and with time near critical areas (Iceland and the Azores) where deep mantle plumes are thought to exist. Over 150 samples have been analysed for up to 40 major and trace elements and the results used to place constraints on the petrogenesis of the erupted basalts and hence on the geochemical nature of their source regions. It is apparent that few of the recovered basalts have the geochemical characteristics of typical "depleted" midocean ridge basalts (MORB). An unusually wide range of basalt compositions may be erupted at a single site: the range of rare earth patterns within the short section cored at Site 413, for instance, encompasses the total variation of REE patterns previously reported from the FAMOUS area. Nevertheless it is possible to account for most of the compositional variation at a single site by partial melting processes (including dynamic melting) and fractional crystallization. Partial melting mechanisms seem to be the dominant processes relating basalt compositions, particularly at 36°N and 45°N, suggesting that long-lived sub-axial magma chambers may not be a consistent feature of the slow-spreading Mid-Atlantic Ridge. Comparisons of basalts erupted at the same ridge segment for periods of the order of 35 m.y. (now lying along the same mantle flow line) do show some significant inter-site differences in Rb/Sr, Ce/Yb, 87Sr/86Sr, etc., which cannot be accounted for by fractionation mechanisms and which must reflect heterogeneities in the mantle source. However when hygromagmatophile (HYG) trace element levels and ratios are considered, it is the constancy or consistency of these HYG ratios which is the more remarkable, implying that the mantle source feeding a ... Dataset Iceland North Atlantic PANGAEA - Data Publisher for Earth & Environmental Science Mid-Atlantic Ridge Reykjanes ENVELOPE(-22.250,-22.250,65.467,65.467) ENVELOPE(-33.388300,-25.952800,63.938700,36.543200) |