Ge/Si ratios in marine siliceous microfossils
A procedure is presented to separate diatoms and radiolaria from marine sediments and from each other, to purify them of elements associated with other phases, and to dissolve them to determine their elemental composition. The cleaning procedure eliminates artifacts due to the presence of detrital c...
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1988
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.756978 2023-05-15T13:42:10+02:00 Ge/Si ratios in marine siliceous microfossils Shemesh, Aldo Mortlock, Richard A Smith, R J Froelich, Philip N MEDIAN LATITUDE: -46.505504 * MEDIAN LONGITUDE: 154.503432 * SOUTH-BOUND LATITUDE: -63.083000 * WEST-BOUND LONGITUDE: 37.904140 * NORTH-BOUND LATITUDE: 55.083000 * EAST-BOUND LONGITUDE: -0.355000 * DATE/TIME START: 1965-01-01T00:00:00 * DATE/TIME END: 1972-12-29T00:00:00 1988-02-07 application/zip, 3 datasets https://doi.pangaea.de/10.1594/PANGAEA.756978 https://doi.org/10.1594/PANGAEA.756978 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.756978 https://doi.org/10.1594/PANGAEA.756978 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Shemesh, Aldo; Mortlock, Richard A; Smith, R J; Froelich, Philip N (1988): Determination of Ge/Si in marine siliceous microfossils: separation, cleaning and dissolution of diatoms and radiolaria. Marine Chemistry, 25(4), 305-323, https://doi.org/10.1016/0304-4203(88)90113-2 28-265 Antarctic Ocean/RIDGE Deep Sea Drilling Project DRILL Drilling/drill rig DSDP ELT17 ELT17.009-PC ELT49 ELT49.007-PC ELT50 ELT50.013-PC Eltanin Glomar Challenger Leg28 PC Piston corer RC13 RC13-256 RC14 RC14-121 Robert Conrad V21 V21-156 Vema Dataset 1988 ftpangaea https://doi.org/10.1594/PANGAEA.756978 https://doi.org/10.1016/0304-4203(88)90113-2 2023-01-20T07:32:03Z A procedure is presented to separate diatoms and radiolaria from marine sediments and from each other, to purify them of elements associated with other phases, and to dissolve them to determine their elemental composition. The cleaning procedure eliminates artifacts due to the presence of detrital clays and the high sorption capacity of hydrated silica. The concentration of trace elements (Al, Fe, Mg, and Ba) that we find in alkaline dissolutions of clean diatoms are at least an order of magnitude lower than previously reported. The overall long-term precision in the determination of Ge/Si in a sub-standard of clean diatoms is ±0.024 * 10**-6 (1 sigma). Ge/Si measured in diatoms and radiolaria from core tops indicates that high-latitude Holocene diatoms accurately record the present-day oceanic Ge/Si, while radiolarian ratios are systematically lower and display more scatter. Evaluation of Ge/Si in diatoms and radiolaria from Hole DSDP 265 (Plio-Pleistocene) suggests that post-depositional alteration of the ratio does not occur at this site, but the average ratio carried by diatoms over this time interval was lower than that in the present ocean. Dataset Antarc* Antarctic Antarctic Ocean PANGAEA - Data Publisher for Earth & Environmental Science Antarctic Antarctic Ocean ENVELOPE(37.904140,-0.355000,55.083000,-63.083000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
28-265 Antarctic Ocean/RIDGE Deep Sea Drilling Project DRILL Drilling/drill rig DSDP ELT17 ELT17.009-PC ELT49 ELT49.007-PC ELT50 ELT50.013-PC Eltanin Glomar Challenger Leg28 PC Piston corer RC13 RC13-256 RC14 RC14-121 Robert Conrad V21 V21-156 Vema |
spellingShingle |
28-265 Antarctic Ocean/RIDGE Deep Sea Drilling Project DRILL Drilling/drill rig DSDP ELT17 ELT17.009-PC ELT49 ELT49.007-PC ELT50 ELT50.013-PC Eltanin Glomar Challenger Leg28 PC Piston corer RC13 RC13-256 RC14 RC14-121 Robert Conrad V21 V21-156 Vema Shemesh, Aldo Mortlock, Richard A Smith, R J Froelich, Philip N Ge/Si ratios in marine siliceous microfossils |
topic_facet |
28-265 Antarctic Ocean/RIDGE Deep Sea Drilling Project DRILL Drilling/drill rig DSDP ELT17 ELT17.009-PC ELT49 ELT49.007-PC ELT50 ELT50.013-PC Eltanin Glomar Challenger Leg28 PC Piston corer RC13 RC13-256 RC14 RC14-121 Robert Conrad V21 V21-156 Vema |
description |
A procedure is presented to separate diatoms and radiolaria from marine sediments and from each other, to purify them of elements associated with other phases, and to dissolve them to determine their elemental composition. The cleaning procedure eliminates artifacts due to the presence of detrital clays and the high sorption capacity of hydrated silica. The concentration of trace elements (Al, Fe, Mg, and Ba) that we find in alkaline dissolutions of clean diatoms are at least an order of magnitude lower than previously reported. The overall long-term precision in the determination of Ge/Si in a sub-standard of clean diatoms is ±0.024 * 10**-6 (1 sigma). Ge/Si measured in diatoms and radiolaria from core tops indicates that high-latitude Holocene diatoms accurately record the present-day oceanic Ge/Si, while radiolarian ratios are systematically lower and display more scatter. Evaluation of Ge/Si in diatoms and radiolaria from Hole DSDP 265 (Plio-Pleistocene) suggests that post-depositional alteration of the ratio does not occur at this site, but the average ratio carried by diatoms over this time interval was lower than that in the present ocean. |
format |
Dataset |
author |
Shemesh, Aldo Mortlock, Richard A Smith, R J Froelich, Philip N |
author_facet |
Shemesh, Aldo Mortlock, Richard A Smith, R J Froelich, Philip N |
author_sort |
Shemesh, Aldo |
title |
Ge/Si ratios in marine siliceous microfossils |
title_short |
Ge/Si ratios in marine siliceous microfossils |
title_full |
Ge/Si ratios in marine siliceous microfossils |
title_fullStr |
Ge/Si ratios in marine siliceous microfossils |
title_full_unstemmed |
Ge/Si ratios in marine siliceous microfossils |
title_sort |
ge/si ratios in marine siliceous microfossils |
publisher |
PANGAEA |
publishDate |
1988 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.756978 https://doi.org/10.1594/PANGAEA.756978 |
op_coverage |
MEDIAN LATITUDE: -46.505504 * MEDIAN LONGITUDE: 154.503432 * SOUTH-BOUND LATITUDE: -63.083000 * WEST-BOUND LONGITUDE: 37.904140 * NORTH-BOUND LATITUDE: 55.083000 * EAST-BOUND LONGITUDE: -0.355000 * DATE/TIME START: 1965-01-01T00:00:00 * DATE/TIME END: 1972-12-29T00:00:00 |
long_lat |
ENVELOPE(37.904140,-0.355000,55.083000,-63.083000) |
geographic |
Antarctic Antarctic Ocean |
geographic_facet |
Antarctic Antarctic Ocean |
genre |
Antarc* Antarctic Antarctic Ocean |
genre_facet |
Antarc* Antarctic Antarctic Ocean |
op_source |
Supplement to: Shemesh, Aldo; Mortlock, Richard A; Smith, R J; Froelich, Philip N (1988): Determination of Ge/Si in marine siliceous microfossils: separation, cleaning and dissolution of diatoms and radiolaria. Marine Chemistry, 25(4), 305-323, https://doi.org/10.1016/0304-4203(88)90113-2 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.756978 https://doi.org/10.1594/PANGAEA.756978 |
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.756978 https://doi.org/10.1016/0304-4203(88)90113-2 |
_version_ |
1766163969975779328 |