Element concentrations of plagioclase and clinopyroxene in poikilitic olivine gabbros from ODP Hole 153-923A (Table 4)
Ocean Drilling Program Hole 923A, located on the western flank of the Mid-Atlantic Ridge south of the Kane Fracture Zone, recovered primitive gabbros that have mineral trace element compositions inconsistent with growth from a single parental melt. Plagioclase crystals commonly show embayed anorthit...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.711293 2024-09-15T18:24:28+00:00 Element concentrations of plagioclase and clinopyroxene in poikilitic olivine gabbros from ODP Hole 153-923A (Table 4) Coogan, Laurence A Kempton, Pamela D Saunders, Andrew D Norry, Michael J LATITUDE: 23.542600 * LONGITUDE: -45.031600 * DATE/TIME START: 1994-01-07T17:27:00 * DATE/TIME END: 1994-01-13T02:45:00 * MINIMUM ORDINAL NUMBER: 1 * MAXIMUM ORDINAL NUMBER: 17 2000 text/tab-separated-values, 401 data points https://doi.pangaea.de/10.1594/PANGAEA.711293 https://doi.org/10.1594/PANGAEA.711293 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.711293 https://doi.org/10.1594/PANGAEA.711293 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Coogan, Laurence A; Kempton, Pamela D; Saunders, Andrew D; Norry, Michael J (2000): Melt aggregation within the crust beneath the Mid-Atlantic Ridge: evidence from plagioclase and clinopyroxene major and trace element compositions. Earth and Planetary Science Letters, 176(2), 245-257, https://doi.org/10.1016/S0012-821X(00)00006-6 153-923A Aluminium oxide Calcium/(Calcium+Sodium+Potassium) ratio Calcium oxide Calculated Cerium Chromium(III) oxide Clinopyroxene Comment DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Dysprosium Electron Probe Microanalysis (EPMA) Erbium Europium Gadolinium Holmium Ion probe analysis Iron oxide FeO Joides Resolution Lanthanum Leg153 Magnesium number Magnesium oxide Manganese oxide Minerals Neodymium North Atlantic Ocean Ocean Drilling Program ODP Olivine ORDINAL NUMBER Plagioclase Praseodymium Samarium Sample code/label Sample comment Silicon dioxide Sodium oxide Strontium Terbium Titanium Titanium dioxide Ytterbium Yttrium Zirconium dataset 2000 ftpangaea https://doi.org/10.1594/PANGAEA.71129310.1016/S0012-821X(00)00006-6 2024-08-21T00:02:26Z Ocean Drilling Program Hole 923A, located on the western flank of the Mid-Atlantic Ridge south of the Kane Fracture Zone, recovered primitive gabbros that have mineral trace element compositions inconsistent with growth from a single parental melt. Plagioclase crystals commonly show embayed anorthitic cores overgrown by more albitic rims. Ion probe analyses of plagioclase cores and rims show consistent differences in trace element ratios, indicating variation in the trace element characteristics of their respective parental melts. This requires the existence of at least two distinct melt compositions within the crust during the generation of these gabbros. Melt compositions calculated to be parental to plagioclase cores are depleted in light rare earth elements, but enriched in yttrium, compared to basalts from this region of the Mid-Atlantic Ridge, which are normal mid-ocean ridge basalt (N-MORB). Clinopyroxene trace element compositions are similar to those predicted to be in equilibrium with N-MORB. However, primitive clinopyroxene crystals are much more magnesian than those produced in one-atmosphere experiments on N-MORB, suggesting that the major element composition of the melt was unlike N-MORB. These data require that the diverse array of melt compositions generated within the mantle beneath mid-ocean ridges are not always fully homogenised during melt extraction from the mantle and that the final stage of mixing can occur efficiently within crustal magma chambers. This has implications for the process of melt extraction from the mantle and the liquid line of descent of MORB Dataset North Atlantic PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-45.031600,-45.031600,23.542600,23.542600) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
153-923A Aluminium oxide Calcium/(Calcium+Sodium+Potassium) ratio Calcium oxide Calculated Cerium Chromium(III) oxide Clinopyroxene Comment DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Dysprosium Electron Probe Microanalysis (EPMA) Erbium Europium Gadolinium Holmium Ion probe analysis Iron oxide FeO Joides Resolution Lanthanum Leg153 Magnesium number Magnesium oxide Manganese oxide Minerals Neodymium North Atlantic Ocean Ocean Drilling Program ODP Olivine ORDINAL NUMBER Plagioclase Praseodymium Samarium Sample code/label Sample comment Silicon dioxide Sodium oxide Strontium Terbium Titanium Titanium dioxide Ytterbium Yttrium Zirconium |
spellingShingle |
153-923A Aluminium oxide Calcium/(Calcium+Sodium+Potassium) ratio Calcium oxide Calculated Cerium Chromium(III) oxide Clinopyroxene Comment DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Dysprosium Electron Probe Microanalysis (EPMA) Erbium Europium Gadolinium Holmium Ion probe analysis Iron oxide FeO Joides Resolution Lanthanum Leg153 Magnesium number Magnesium oxide Manganese oxide Minerals Neodymium North Atlantic Ocean Ocean Drilling Program ODP Olivine ORDINAL NUMBER Plagioclase Praseodymium Samarium Sample code/label Sample comment Silicon dioxide Sodium oxide Strontium Terbium Titanium Titanium dioxide Ytterbium Yttrium Zirconium Coogan, Laurence A Kempton, Pamela D Saunders, Andrew D Norry, Michael J Element concentrations of plagioclase and clinopyroxene in poikilitic olivine gabbros from ODP Hole 153-923A (Table 4) |
topic_facet |
153-923A Aluminium oxide Calcium/(Calcium+Sodium+Potassium) ratio Calcium oxide Calculated Cerium Chromium(III) oxide Clinopyroxene Comment DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Dysprosium Electron Probe Microanalysis (EPMA) Erbium Europium Gadolinium Holmium Ion probe analysis Iron oxide FeO Joides Resolution Lanthanum Leg153 Magnesium number Magnesium oxide Manganese oxide Minerals Neodymium North Atlantic Ocean Ocean Drilling Program ODP Olivine ORDINAL NUMBER Plagioclase Praseodymium Samarium Sample code/label Sample comment Silicon dioxide Sodium oxide Strontium Terbium Titanium Titanium dioxide Ytterbium Yttrium Zirconium |
description |
Ocean Drilling Program Hole 923A, located on the western flank of the Mid-Atlantic Ridge south of the Kane Fracture Zone, recovered primitive gabbros that have mineral trace element compositions inconsistent with growth from a single parental melt. Plagioclase crystals commonly show embayed anorthitic cores overgrown by more albitic rims. Ion probe analyses of plagioclase cores and rims show consistent differences in trace element ratios, indicating variation in the trace element characteristics of their respective parental melts. This requires the existence of at least two distinct melt compositions within the crust during the generation of these gabbros. Melt compositions calculated to be parental to plagioclase cores are depleted in light rare earth elements, but enriched in yttrium, compared to basalts from this region of the Mid-Atlantic Ridge, which are normal mid-ocean ridge basalt (N-MORB). Clinopyroxene trace element compositions are similar to those predicted to be in equilibrium with N-MORB. However, primitive clinopyroxene crystals are much more magnesian than those produced in one-atmosphere experiments on N-MORB, suggesting that the major element composition of the melt was unlike N-MORB. These data require that the diverse array of melt compositions generated within the mantle beneath mid-ocean ridges are not always fully homogenised during melt extraction from the mantle and that the final stage of mixing can occur efficiently within crustal magma chambers. This has implications for the process of melt extraction from the mantle and the liquid line of descent of MORB |
format |
Dataset |
author |
Coogan, Laurence A Kempton, Pamela D Saunders, Andrew D Norry, Michael J |
author_facet |
Coogan, Laurence A Kempton, Pamela D Saunders, Andrew D Norry, Michael J |
author_sort |
Coogan, Laurence A |
title |
Element concentrations of plagioclase and clinopyroxene in poikilitic olivine gabbros from ODP Hole 153-923A (Table 4) |
title_short |
Element concentrations of plagioclase and clinopyroxene in poikilitic olivine gabbros from ODP Hole 153-923A (Table 4) |
title_full |
Element concentrations of plagioclase and clinopyroxene in poikilitic olivine gabbros from ODP Hole 153-923A (Table 4) |
title_fullStr |
Element concentrations of plagioclase and clinopyroxene in poikilitic olivine gabbros from ODP Hole 153-923A (Table 4) |
title_full_unstemmed |
Element concentrations of plagioclase and clinopyroxene in poikilitic olivine gabbros from ODP Hole 153-923A (Table 4) |
title_sort |
element concentrations of plagioclase and clinopyroxene in poikilitic olivine gabbros from odp hole 153-923a (table 4) |
publisher |
PANGAEA |
publishDate |
2000 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.711293 https://doi.org/10.1594/PANGAEA.711293 |
op_coverage |
LATITUDE: 23.542600 * LONGITUDE: -45.031600 * DATE/TIME START: 1994-01-07T17:27:00 * DATE/TIME END: 1994-01-13T02:45:00 * MINIMUM ORDINAL NUMBER: 1 * MAXIMUM ORDINAL NUMBER: 17 |
long_lat |
ENVELOPE(-45.031600,-45.031600,23.542600,23.542600) |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Supplement to: Coogan, Laurence A; Kempton, Pamela D; Saunders, Andrew D; Norry, Michael J (2000): Melt aggregation within the crust beneath the Mid-Atlantic Ridge: evidence from plagioclase and clinopyroxene major and trace element compositions. Earth and Planetary Science Letters, 176(2), 245-257, https://doi.org/10.1016/S0012-821X(00)00006-6 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.711293 https://doi.org/10.1594/PANGAEA.711293 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.71129310.1016/S0012-821X(00)00006-6 |
_version_ |
1810464826970865664 |