(Table 1) Composition of DSDP Hole 37-334 clinopyroxenes
Recent studies of abyssal peridotites (Johnson et al., 1990, doi:10.1029/JB095iB03p02661), mid-ocean-ridge basalts (MORBs) (McKenzie, 1985, doi:10.1016/0012-821X(85)90001-9) and their entrained melt inclusions (Sobolev and Shimizu, 1993, doi:10.1038/363151a0; Humler and Whitechurch, 1988, doi:10.101...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.769881 2023-05-15T17:36:14+02:00 (Table 1) Composition of DSDP Hole 37-334 clinopyroxenes Ross, Kent Elthon, Don LATITUDE: 37.035500 * LONGITUDE: -34.414500 * DATE/TIME START: 1974-07-14T00:00:00 * DATE/TIME END: 1974-07-14T00:00:00 * MINIMUM ELEVATION: -2619.0 m * MAXIMUM ELEVATION: -2619.0 m 1993-09-16 text/tab-separated-values, 252 data points https://doi.pangaea.de/10.1594/PANGAEA.769881 https://doi.org/10.1594/PANGAEA.769881 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.769881 https://doi.org/10.1594/PANGAEA.769881 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Ross, Kent; Elthon, Don (1993): Cumulates from strongly depleted mid-ocean-ridge basalt. Nature, 365(6449), 826-829, https://doi.org/10.1038/365826a0 37-334 Cerium Chromium Deep Sea Drilling Project DRILL Drilling/drill rig DSDP DSDP/ODP/IODP sample designation Dysprosium Electron microprobe (EMP) Erbium Europium Glomar Challenger Lanthanum Leg37 Lithology/composition/facies Magnesium number Neodymium North Atlantic/BASIN Samarium Sample code/label Sample code/label 2 Strontium Titanium Vanadium Ytterbium Yttrium Zirconium Dataset 1993 ftpangaea https://doi.org/10.1594/PANGAEA.769881 https://doi.org/10.1038/365826a0 2023-01-20T08:52:40Z Recent studies of abyssal peridotites (Johnson et al., 1990, doi:10.1029/JB095iB03p02661), mid-ocean-ridge basalts (MORBs) (McKenzie, 1985, doi:10.1016/0012-821X(85)90001-9) and their entrained melt inclusions (Sobolev and Shimizu, 1993, doi:10.1038/363151a0; Humler and Whitechurch, 1988, doi:10.1016/0012-821X(88)90055-6) have shown that fractional melting of the upwelling sub-oceanic mantle produces magmas with a much wider range of compositions than erupted MORBs. In particular, it seems that strongly depleted primary magmas are routinely produced by melting beneath ridges (Johnson et al., 1990, doi:10.1029/JB095iB03p02661). The absence of strongly depleted melts as erupted lavas prompts the question of how long such magmas survive beneath ridges, before their distinctive compositions are concealed by mixing with more enriched magmas. Here we report mineral compositions from a unique suite of oceanic cumulates recovered from DSDP Site 334 (Aumento et al., doi:10.2973/dsdp.proc.37.1977), which indicate that the rocks crystallized from basaltic liquids that were strongly depleted in Na, Ti, Zr, Y, Sr and rare-earth elements relative to any erupted MORB. It thus appears that the magmatic plumbing system beneath the Mid-Atlantic Ridge permitted strongly depleted magmas to accumulate in a magma chamber and remain sufficiently isolated to produce cumulate rocks. Even so, spatial heterogeneity in the compositions of high-calcium pyroxenes suggests that in the later stages of solidification these rocks reacted with infiltrating enriched basaltic liquids. Dataset North Atlantic PANGAEA - Data Publisher for Earth & Environmental Science Mid-Atlantic Ridge ENVELOPE(-34.414500,-34.414500,37.035500,37.035500) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
37-334 Cerium Chromium Deep Sea Drilling Project DRILL Drilling/drill rig DSDP DSDP/ODP/IODP sample designation Dysprosium Electron microprobe (EMP) Erbium Europium Glomar Challenger Lanthanum Leg37 Lithology/composition/facies Magnesium number Neodymium North Atlantic/BASIN Samarium Sample code/label Sample code/label 2 Strontium Titanium Vanadium Ytterbium Yttrium Zirconium |
spellingShingle |
37-334 Cerium Chromium Deep Sea Drilling Project DRILL Drilling/drill rig DSDP DSDP/ODP/IODP sample designation Dysprosium Electron microprobe (EMP) Erbium Europium Glomar Challenger Lanthanum Leg37 Lithology/composition/facies Magnesium number Neodymium North Atlantic/BASIN Samarium Sample code/label Sample code/label 2 Strontium Titanium Vanadium Ytterbium Yttrium Zirconium Ross, Kent Elthon, Don (Table 1) Composition of DSDP Hole 37-334 clinopyroxenes |
topic_facet |
37-334 Cerium Chromium Deep Sea Drilling Project DRILL Drilling/drill rig DSDP DSDP/ODP/IODP sample designation Dysprosium Electron microprobe (EMP) Erbium Europium Glomar Challenger Lanthanum Leg37 Lithology/composition/facies Magnesium number Neodymium North Atlantic/BASIN Samarium Sample code/label Sample code/label 2 Strontium Titanium Vanadium Ytterbium Yttrium Zirconium |
description |
Recent studies of abyssal peridotites (Johnson et al., 1990, doi:10.1029/JB095iB03p02661), mid-ocean-ridge basalts (MORBs) (McKenzie, 1985, doi:10.1016/0012-821X(85)90001-9) and their entrained melt inclusions (Sobolev and Shimizu, 1993, doi:10.1038/363151a0; Humler and Whitechurch, 1988, doi:10.1016/0012-821X(88)90055-6) have shown that fractional melting of the upwelling sub-oceanic mantle produces magmas with a much wider range of compositions than erupted MORBs. In particular, it seems that strongly depleted primary magmas are routinely produced by melting beneath ridges (Johnson et al., 1990, doi:10.1029/JB095iB03p02661). The absence of strongly depleted melts as erupted lavas prompts the question of how long such magmas survive beneath ridges, before their distinctive compositions are concealed by mixing with more enriched magmas. Here we report mineral compositions from a unique suite of oceanic cumulates recovered from DSDP Site 334 (Aumento et al., doi:10.2973/dsdp.proc.37.1977), which indicate that the rocks crystallized from basaltic liquids that were strongly depleted in Na, Ti, Zr, Y, Sr and rare-earth elements relative to any erupted MORB. It thus appears that the magmatic plumbing system beneath the Mid-Atlantic Ridge permitted strongly depleted magmas to accumulate in a magma chamber and remain sufficiently isolated to produce cumulate rocks. Even so, spatial heterogeneity in the compositions of high-calcium pyroxenes suggests that in the later stages of solidification these rocks reacted with infiltrating enriched basaltic liquids. |
format |
Dataset |
author |
Ross, Kent Elthon, Don |
author_facet |
Ross, Kent Elthon, Don |
author_sort |
Ross, Kent |
title |
(Table 1) Composition of DSDP Hole 37-334 clinopyroxenes |
title_short |
(Table 1) Composition of DSDP Hole 37-334 clinopyroxenes |
title_full |
(Table 1) Composition of DSDP Hole 37-334 clinopyroxenes |
title_fullStr |
(Table 1) Composition of DSDP Hole 37-334 clinopyroxenes |
title_full_unstemmed |
(Table 1) Composition of DSDP Hole 37-334 clinopyroxenes |
title_sort |
(table 1) composition of dsdp hole 37-334 clinopyroxenes |
publisher |
PANGAEA |
publishDate |
1993 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.769881 https://doi.org/10.1594/PANGAEA.769881 |
op_coverage |
LATITUDE: 37.035500 * LONGITUDE: -34.414500 * DATE/TIME START: 1974-07-14T00:00:00 * DATE/TIME END: 1974-07-14T00:00:00 * MINIMUM ELEVATION: -2619.0 m * MAXIMUM ELEVATION: -2619.0 m |
long_lat |
ENVELOPE(-34.414500,-34.414500,37.035500,37.035500) |
geographic |
Mid-Atlantic Ridge |
geographic_facet |
Mid-Atlantic Ridge |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Supplement to: Ross, Kent; Elthon, Don (1993): Cumulates from strongly depleted mid-ocean-ridge basalt. Nature, 365(6449), 826-829, https://doi.org/10.1038/365826a0 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.769881 https://doi.org/10.1594/PANGAEA.769881 |
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.769881 https://doi.org/10.1038/365826a0 |
_version_ |
1766135649321091072 |