Chemical composition and isotopic ratios of basic lavas from Iceland and the surrounding ocean floor
Major and trace dement data are used to establish the nature and extent of spatial and temporal chemical variations in basalts erupted in the Iceland region of the North Atlantic Ocean. The ocean floor samples are those recovered by legs 38 and 49 of the Deep Sea Drilling Project. Within each of the...
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1979
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.667460 2023-05-15T16:30:41+02:00 Chemical composition and isotopic ratios of basic lavas from Iceland and the surrounding ocean floor Wood, D A Joron, Jean Louis Treuil, M Norry, Michael J Tarney, J MEDIAN LATITUDE: 66.676566 * MEDIAN LONGITUDE: -9.471563 * SOUTH-BOUND LATITUDE: 62.616300 * WEST-BOUND LONGITUDE: -30.576000 * NORTH-BOUND LATITUDE: 76.149700 * EAST-BOUND LONGITUDE: 7.875300 * DATE/TIME START: 1974-08-07T00:00:00 * DATE/TIME END: 1976-08-02T00:00:00 1979-11-07 application/zip, 14 datasets https://doi.pangaea.de/10.1594/PANGAEA.667460 https://doi.org/10.1594/PANGAEA.667460 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.667460 https://doi.org/10.1594/PANGAEA.667460 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; Joron, Jean Louis; Treuil, M; Norry, Michael J; Tarney, J (1979): Elemental and Sr isotope variations in basic lavas from Iceland and the surrounding ocean floor. Contributions to Mineralogy and Petrology, 70(3), 319-339, https://doi.org/10.1007/BF00375360 38-336 38-337 38-338 38-342 38-343 38-344 38-345 38-348 38-350 49-407 49-408 49-409 Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Iceland Leg38 Leg49 MULT Multiple investigations North Atlantic/Greenland Sea/RIDGE North Atlantic/Norwegian Sea North Atlantic/Norwegian Sea/BASIN North Atlantic/Norwegian Sea/PLATEAU North Atlantic/Norwegian Sea/RIDGE North Atlantic/RIDGE Dataset 1979 ftpangaea https://doi.org/10.1594/PANGAEA.667460 https://doi.org/10.1007/BF00375360 2023-01-20T07:31:05Z Major and trace dement data are used to establish the nature and extent of spatial and temporal chemical variations in basalts erupted in the Iceland region of the North Atlantic Ocean. The ocean floor samples are those recovered by legs 38 and 49 of the Deep Sea Drilling Project. Within each of the active zones on Iceland there are small scale variations in the light rare earth elements and ratios such as K/Y: several central complexes and their associated fissure swarms erupt basalts with values of K/Y distinct from those erupted at adjacent centres; also basalts showing a wide range of immobile trace element ratios occur together within single vertical sections and ocean floor drill holes. Although such variations can be explained in terms of the magmatic processes operating on Iceland they make extrapolations from single basalt samples to mantle sources underlying the outcrop of the sample highly tenuous. 87Sr/86Sr ratios measured for 25 of the samples indicate a total range from 0.7028 in a tholeiite from the Reykjanes Ridge to 0.7034 in an alkali basalt from Iceland and are consistent with other published ratios from the region. A positive correlation between 87Sr/86Sr and Ce/Yb ratios indicates the existence of systematic isotopic and elemental variations in the mantle source region. An approximately fivefold variation in Ce/Yb ratio observed in basalts with the same 87Sr/86Sr ratio implies that different degrees and types of partial melting have been involved in magma genesis from a single mantle composition. 87Sr/86Sr ratios above 0.7028, Th/U ratios close to 4 and La/Ta ratios close to 10 distinguish most basalts erupted in this part of the North Atlantic Ocean from normal mid-ocean ridge basalt (N-type MORB) – although N-type MORB has been erupted at extinct spreading axes just to the north and northeast of Iceland as well as the presently active Iceland-Jan Mayen Ridge. Comparisons with the hygromagmatophile element and radiogenic isotope ratios of MORB and the estimated primordial mantle indicate ... Dataset Greenland Greenland Sea Iceland Jan Mayen North Atlantic Norwegian Sea PANGAEA - Data Publisher for Earth & Environmental Science Greenland Jan Mayen Jan Mayen Ridge ENVELOPE(-8.000,-8.000,69.000,69.000) Norwegian Sea Reykjanes ENVELOPE(-22.250,-22.250,65.467,65.467) ENVELOPE(-30.576000,7.875300,76.149700,62.616300) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
38-336 38-337 38-338 38-342 38-343 38-344 38-345 38-348 38-350 49-407 49-408 49-409 Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Iceland Leg38 Leg49 MULT Multiple investigations North Atlantic/Greenland Sea/RIDGE North Atlantic/Norwegian Sea North Atlantic/Norwegian Sea/BASIN North Atlantic/Norwegian Sea/PLATEAU North Atlantic/Norwegian Sea/RIDGE North Atlantic/RIDGE |
spellingShingle |
38-336 38-337 38-338 38-342 38-343 38-344 38-345 38-348 38-350 49-407 49-408 49-409 Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Iceland Leg38 Leg49 MULT Multiple investigations North Atlantic/Greenland Sea/RIDGE North Atlantic/Norwegian Sea North Atlantic/Norwegian Sea/BASIN North Atlantic/Norwegian Sea/PLATEAU North Atlantic/Norwegian Sea/RIDGE North Atlantic/RIDGE Wood, D A Joron, Jean Louis Treuil, M Norry, Michael J Tarney, J Chemical composition and isotopic ratios of basic lavas from Iceland and the surrounding ocean floor |
topic_facet |
38-336 38-337 38-338 38-342 38-343 38-344 38-345 38-348 38-350 49-407 49-408 49-409 Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Iceland Leg38 Leg49 MULT Multiple investigations North Atlantic/Greenland Sea/RIDGE North Atlantic/Norwegian Sea North Atlantic/Norwegian Sea/BASIN North Atlantic/Norwegian Sea/PLATEAU North Atlantic/Norwegian Sea/RIDGE North Atlantic/RIDGE |
description |
Major and trace dement data are used to establish the nature and extent of spatial and temporal chemical variations in basalts erupted in the Iceland region of the North Atlantic Ocean. The ocean floor samples are those recovered by legs 38 and 49 of the Deep Sea Drilling Project. Within each of the active zones on Iceland there are small scale variations in the light rare earth elements and ratios such as K/Y: several central complexes and their associated fissure swarms erupt basalts with values of K/Y distinct from those erupted at adjacent centres; also basalts showing a wide range of immobile trace element ratios occur together within single vertical sections and ocean floor drill holes. Although such variations can be explained in terms of the magmatic processes operating on Iceland they make extrapolations from single basalt samples to mantle sources underlying the outcrop of the sample highly tenuous. 87Sr/86Sr ratios measured for 25 of the samples indicate a total range from 0.7028 in a tholeiite from the Reykjanes Ridge to 0.7034 in an alkali basalt from Iceland and are consistent with other published ratios from the region. A positive correlation between 87Sr/86Sr and Ce/Yb ratios indicates the existence of systematic isotopic and elemental variations in the mantle source region. An approximately fivefold variation in Ce/Yb ratio observed in basalts with the same 87Sr/86Sr ratio implies that different degrees and types of partial melting have been involved in magma genesis from a single mantle composition. 87Sr/86Sr ratios above 0.7028, Th/U ratios close to 4 and La/Ta ratios close to 10 distinguish most basalts erupted in this part of the North Atlantic Ocean from normal mid-ocean ridge basalt (N-type MORB) – although N-type MORB has been erupted at extinct spreading axes just to the north and northeast of Iceland as well as the presently active Iceland-Jan Mayen Ridge. Comparisons with the hygromagmatophile element and radiogenic isotope ratios of MORB and the estimated primordial mantle indicate ... |
format |
Dataset |
author |
Wood, D A Joron, Jean Louis Treuil, M Norry, Michael J Tarney, J |
author_facet |
Wood, D A Joron, Jean Louis Treuil, M Norry, Michael J Tarney, J |
author_sort |
Wood, D A |
title |
Chemical composition and isotopic ratios of basic lavas from Iceland and the surrounding ocean floor |
title_short |
Chemical composition and isotopic ratios of basic lavas from Iceland and the surrounding ocean floor |
title_full |
Chemical composition and isotopic ratios of basic lavas from Iceland and the surrounding ocean floor |
title_fullStr |
Chemical composition and isotopic ratios of basic lavas from Iceland and the surrounding ocean floor |
title_full_unstemmed |
Chemical composition and isotopic ratios of basic lavas from Iceland and the surrounding ocean floor |
title_sort |
chemical composition and isotopic ratios of basic lavas from iceland and the surrounding ocean floor |
publisher |
PANGAEA |
publishDate |
1979 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.667460 https://doi.org/10.1594/PANGAEA.667460 |
op_coverage |
MEDIAN LATITUDE: 66.676566 * MEDIAN LONGITUDE: -9.471563 * SOUTH-BOUND LATITUDE: 62.616300 * WEST-BOUND LONGITUDE: -30.576000 * NORTH-BOUND LATITUDE: 76.149700 * EAST-BOUND LONGITUDE: 7.875300 * DATE/TIME START: 1974-08-07T00:00:00 * DATE/TIME END: 1976-08-02T00:00:00 |
long_lat |
ENVELOPE(-8.000,-8.000,69.000,69.000) ENVELOPE(-22.250,-22.250,65.467,65.467) ENVELOPE(-30.576000,7.875300,76.149700,62.616300) |
geographic |
Greenland Jan Mayen Jan Mayen Ridge Norwegian Sea Reykjanes |
geographic_facet |
Greenland Jan Mayen Jan Mayen Ridge Norwegian Sea Reykjanes |
genre |
Greenland Greenland Sea Iceland Jan Mayen North Atlantic Norwegian Sea |
genre_facet |
Greenland Greenland Sea Iceland Jan Mayen North Atlantic Norwegian Sea |
op_source |
Supplement to: Wood, D A; Joron, Jean Louis; Treuil, M; Norry, Michael J; Tarney, J (1979): Elemental and Sr isotope variations in basic lavas from Iceland and the surrounding ocean floor. Contributions to Mineralogy and Petrology, 70(3), 319-339, https://doi.org/10.1007/BF00375360 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.667460 https://doi.org/10.1594/PANGAEA.667460 |
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.667460 https://doi.org/10.1007/BF00375360 |
_version_ |
1766020416513507328 |