Smear slide grain counts from IODP Site 323-U1342
Here we present new grain count data from from Integrated Ocean Drilling Program (IODP) Expedition 323 Site U1342 Holes A, C, and D. New records of sediment composition from laminated and non-laminated were determined from smear slide (quantitative grain counts) and particle size analyses. A subset...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.933699 2024-09-15T17:59:36+00:00 Smear slide grain counts from IODP Site 323-U1342 Aiello, Ivano W Knudson, Karla P Ravelo, Ana Christina Drake, Michelle K MEDIAN LATITUDE: 54.828337 * MEDIAN LONGITUDE: 176.916882 * SOUTH-BOUND LATITUDE: 54.828312 * WEST-BOUND LONGITUDE: 176.916712 * NORTH-BOUND LATITUDE: 54.828362 * EAST-BOUND LONGITUDE: 176.917053 * MINIMUM ELEVATION: -818.8 m * MAXIMUM ELEVATION: -818.2 m text/tab-separated-values, 906 data points https://doi.pangaea.de/10.1594/PANGAEA.933699 en eng PANGAEA Knudson, Karla P; Ravelo, Ana Christina; Aiello, Ivano W; Knudson, C P; Drake, Michelle K; Sakamoto, Tatsuhiko (accepted): Causes and Timing of Subarctic Pacific Hypoxia. Science Advances https://doi.pangaea.de/10.1594/PANGAEA.933699 CC-BY-4.0: Creative Commons Attribution 4.0 International (License comes into effect after moratorium ends) Access constraints: access rights needed info:eu-repo/semantics/restrictedAccess 323-U1342C 323-U1342D AGE Bering Sea Bering Sea Paleoceanography Calcareous spicules Clay Coccolithophores Coccoliths Depth bottom/max top/min diatoms centrales pennales DRILL Drilling/drill rig Event label Exp323 Foraminifera grain counts iron fertilization Joides Resolution laminated North Pacific Opaque minerals Radiolarians Run Sample code/label Sample mass Sample type sediments see abstract Siliciclastics Silicoflagellates Size fraction Size fraction mode size smear slide sponge spicules Standard deviation Total Volcanic components dataset ftpangaea 2024-07-24T02:31:34Z Here we present new grain count data from from Integrated Ocean Drilling Program (IODP) Expedition 323 Site U1342 Holes A, C, and D. New records of sediment composition from laminated and non-laminated were determined from smear slide (quantitative grain counts) and particle size analyses. A subset of samples from three laminated intervals (672-697 ka, 826-836 ka, and 847-851 ka) and four adjacent massive intervals (668-671 ka, 822-825 ka, 803-845 ka, and 853-856 ka) were selected for analyses. Sediment smear slides were examined with a transmitted light petrographic microscope equipped with a standard eyepiece micrometer. Biogenic (pennate and centric diatoms, silicoflagellates, sponge spicules, foraminifers, and coccolithophores), mineral (clay minerals, silt- to sand-size siliciclastics), and volcaniclastic components were identified and their percentage abundances were visually determined under a petrographic microscope using a 40X objective and 10X eyepiece. For each sample, 3 counts were done on different parts of a smear slide using a random walk, and the average value of the 3 counts was used. Particle size analyses on the same samples were carried out with a Beckman-Coulter LS 13 320 laser particle size analyzer (LPSA) attached to an aqueous module equipped with a pump and a built-in ultrasound unit. Size distributions were analyzed from 0.04 µm to 2 mm. Measurements of such a wide particle size range are possible because the particle sizer is composed of two units: a laser beam for conventional (Fraunhofer) diffraction (from 0.4 µm to 2 mm) and a polarized intensity differential scatter (PIDS) unit, which measures particles based on the Mie theory of light scattering (0.04 µm). The samples for the analyses were subsampled and dispersed in the deionized water of the aqueous module of the particle sizer until obscuration values of 10%–15% and PIDS obscuration values of 48%–52% were obtained. The optical model chosen for the grain size determination is the default Fraunhofer model, based on the Fraunhofer ... Dataset Bering Sea PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(176.916712,176.917053,54.828362,54.828312) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
323-U1342C 323-U1342D AGE Bering Sea Bering Sea Paleoceanography Calcareous spicules Clay Coccolithophores Coccoliths Depth bottom/max top/min diatoms centrales pennales DRILL Drilling/drill rig Event label Exp323 Foraminifera grain counts iron fertilization Joides Resolution laminated North Pacific Opaque minerals Radiolarians Run Sample code/label Sample mass Sample type sediments see abstract Siliciclastics Silicoflagellates Size fraction Size fraction mode size smear slide sponge spicules Standard deviation Total Volcanic components |
spellingShingle |
323-U1342C 323-U1342D AGE Bering Sea Bering Sea Paleoceanography Calcareous spicules Clay Coccolithophores Coccoliths Depth bottom/max top/min diatoms centrales pennales DRILL Drilling/drill rig Event label Exp323 Foraminifera grain counts iron fertilization Joides Resolution laminated North Pacific Opaque minerals Radiolarians Run Sample code/label Sample mass Sample type sediments see abstract Siliciclastics Silicoflagellates Size fraction Size fraction mode size smear slide sponge spicules Standard deviation Total Volcanic components Aiello, Ivano W Knudson, Karla P Ravelo, Ana Christina Drake, Michelle K Smear slide grain counts from IODP Site 323-U1342 |
topic_facet |
323-U1342C 323-U1342D AGE Bering Sea Bering Sea Paleoceanography Calcareous spicules Clay Coccolithophores Coccoliths Depth bottom/max top/min diatoms centrales pennales DRILL Drilling/drill rig Event label Exp323 Foraminifera grain counts iron fertilization Joides Resolution laminated North Pacific Opaque minerals Radiolarians Run Sample code/label Sample mass Sample type sediments see abstract Siliciclastics Silicoflagellates Size fraction Size fraction mode size smear slide sponge spicules Standard deviation Total Volcanic components |
description |
Here we present new grain count data from from Integrated Ocean Drilling Program (IODP) Expedition 323 Site U1342 Holes A, C, and D. New records of sediment composition from laminated and non-laminated were determined from smear slide (quantitative grain counts) and particle size analyses. A subset of samples from three laminated intervals (672-697 ka, 826-836 ka, and 847-851 ka) and four adjacent massive intervals (668-671 ka, 822-825 ka, 803-845 ka, and 853-856 ka) were selected for analyses. Sediment smear slides were examined with a transmitted light petrographic microscope equipped with a standard eyepiece micrometer. Biogenic (pennate and centric diatoms, silicoflagellates, sponge spicules, foraminifers, and coccolithophores), mineral (clay minerals, silt- to sand-size siliciclastics), and volcaniclastic components were identified and their percentage abundances were visually determined under a petrographic microscope using a 40X objective and 10X eyepiece. For each sample, 3 counts were done on different parts of a smear slide using a random walk, and the average value of the 3 counts was used. Particle size analyses on the same samples were carried out with a Beckman-Coulter LS 13 320 laser particle size analyzer (LPSA) attached to an aqueous module equipped with a pump and a built-in ultrasound unit. Size distributions were analyzed from 0.04 µm to 2 mm. Measurements of such a wide particle size range are possible because the particle sizer is composed of two units: a laser beam for conventional (Fraunhofer) diffraction (from 0.4 µm to 2 mm) and a polarized intensity differential scatter (PIDS) unit, which measures particles based on the Mie theory of light scattering (0.04 µm). The samples for the analyses were subsampled and dispersed in the deionized water of the aqueous module of the particle sizer until obscuration values of 10%–15% and PIDS obscuration values of 48%–52% were obtained. The optical model chosen for the grain size determination is the default Fraunhofer model, based on the Fraunhofer ... |
format |
Dataset |
author |
Aiello, Ivano W Knudson, Karla P Ravelo, Ana Christina Drake, Michelle K |
author_facet |
Aiello, Ivano W Knudson, Karla P Ravelo, Ana Christina Drake, Michelle K |
author_sort |
Aiello, Ivano W |
title |
Smear slide grain counts from IODP Site 323-U1342 |
title_short |
Smear slide grain counts from IODP Site 323-U1342 |
title_full |
Smear slide grain counts from IODP Site 323-U1342 |
title_fullStr |
Smear slide grain counts from IODP Site 323-U1342 |
title_full_unstemmed |
Smear slide grain counts from IODP Site 323-U1342 |
title_sort |
smear slide grain counts from iodp site 323-u1342 |
publisher |
PANGAEA |
url |
https://doi.pangaea.de/10.1594/PANGAEA.933699 |
op_coverage |
MEDIAN LATITUDE: 54.828337 * MEDIAN LONGITUDE: 176.916882 * SOUTH-BOUND LATITUDE: 54.828312 * WEST-BOUND LONGITUDE: 176.916712 * NORTH-BOUND LATITUDE: 54.828362 * EAST-BOUND LONGITUDE: 176.917053 * MINIMUM ELEVATION: -818.8 m * MAXIMUM ELEVATION: -818.2 m |
long_lat |
ENVELOPE(176.916712,176.917053,54.828362,54.828312) |
genre |
Bering Sea |
genre_facet |
Bering Sea |
op_relation |
Knudson, Karla P; Ravelo, Ana Christina; Aiello, Ivano W; Knudson, C P; Drake, Michelle K; Sakamoto, Tatsuhiko (accepted): Causes and Timing of Subarctic Pacific Hypoxia. Science Advances https://doi.pangaea.de/10.1594/PANGAEA.933699 |
op_rights |
CC-BY-4.0: Creative Commons Attribution 4.0 International (License comes into effect after moratorium ends) Access constraints: access rights needed info:eu-repo/semantics/restrictedAccess |
_version_ |
1810436705045446656 |