Quartz flux at Lake Motosu Site MOT15-2
Quantitative X-ray diffraction (XRD) analysis was performed on 109 samples to determine the amount of quartz in MOT15-2 core using a Bruker D2 Phaser at the Atmosphere and Ocean Research Institute, The University of Tokyo. Slit width was 0.4 mm, and with a 4˚ soller slit. Measurements were performed...
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Language: | English |
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PANGAEA
2024
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Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.965002 https://doi.org/10.1594/PANGAEA.965002 |
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.965002 |
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openpolar |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Calculated Calculated according to age-depth model of Obrochta et al. (2018) COMPCORE Composite Core Density DEPTH sediment/rock bottom/maximum top/minimum Gas Pycnometer Micromeritics AccuPyc II 1340 JSPS KAKENHI KAKENHI LATITUDE LONGITUDE MOT15-2 Peak area total quartz flux Quartz (peak area) Sedimentation rate X-ray diffraction (XRD) |
spellingShingle |
Calculated Calculated according to age-depth model of Obrochta et al. (2018) COMPCORE Composite Core Density DEPTH sediment/rock bottom/maximum top/minimum Gas Pycnometer Micromeritics AccuPyc II 1340 JSPS KAKENHI KAKENHI LATITUDE LONGITUDE MOT15-2 Peak area total quartz flux Quartz (peak area) Sedimentation rate X-ray diffraction (XRD) Nemoto, Karin Yokoyama, Yusuke Obrochta, Stephen P Miyairi, Yosuke Fujiwara, Osamu Yamamoto, Shinya Nakamura, Atsunori Hubert-Ferrari, Aurélia Heyvaert, Vanessa De Batist, Marc Quartz flux at Lake Motosu Site MOT15-2 |
topic_facet |
Calculated Calculated according to age-depth model of Obrochta et al. (2018) COMPCORE Composite Core Density DEPTH sediment/rock bottom/maximum top/minimum Gas Pycnometer Micromeritics AccuPyc II 1340 JSPS KAKENHI KAKENHI LATITUDE LONGITUDE MOT15-2 Peak area total quartz flux Quartz (peak area) Sedimentation rate X-ray diffraction (XRD) |
description |
Quantitative X-ray diffraction (XRD) analysis was performed on 109 samples to determine the amount of quartz in MOT15-2 core using a Bruker D2 Phaser at the Atmosphere and Ocean Research Institute, The University of Tokyo. Slit width was 0.4 mm, and with a 4˚ soller slit. Measurements were performed between 20˚ and 35˚ 2θ at a 0.01˚ step for 0.2 seconds per step. The area of the quartz peak (~26.6˚) was determined by trapezoidal numerical integration using MATLAB. Prior to XRD measurement, samples were first pretreated with H₂O₂ to dissolve organic matter, then treated with sodium hexametaphosphate to disaggregate the clay minerals. Next, samples were centrifuged for 5 minutes to settle particles coarser than 2 µm. The supernatant solution was reserved for later clay-mineral analysis, which is not discussed in this study. Samples were dried, crushed, and packed into measurement holders. Six standards were prepared for quantitative conversion of peak area to mineral percentage by mixing known amounts of quartz (Quartz Granular from Wako Pure Chemical Industries, Lot. SDE2986) and calcite (Calcium carbonate, 4N made by Kanto Kagaku, Lot. 208N2154). Calcite is used to dilute quartz because it is not naturally occurring in the lake and its peak does not interfere with quartz peaks. Standards consist of 5, 10, 15, 20, 25 and 30% quartz. These standards were measured under identical conditions as the samples. A linear model was fit to the known percentages and peak areas. Volume of samples freeze-dried in the cube was measured to obtain the quartz deposition flux by a Micromeritics Gas Pycnometer AccuPyc II (1340 series), which uses a substitution of He gas, at Atmosphere and Ocean Research Institute, University of Tokyo. We calculated quartz flux at Lake Motosu by multiplying obtained quartz percentage, dry bulk density and sedimentation rate. Volcanic layers are considered to be instantaneous when calculating sedimentation rate. Sedimentation rate is calculated using age-depth model provided by Obrochta et al. ... |
format |
Dataset |
author |
Nemoto, Karin Yokoyama, Yusuke Obrochta, Stephen P Miyairi, Yosuke Fujiwara, Osamu Yamamoto, Shinya Nakamura, Atsunori Hubert-Ferrari, Aurélia Heyvaert, Vanessa De Batist, Marc |
author_facet |
Nemoto, Karin Yokoyama, Yusuke Obrochta, Stephen P Miyairi, Yosuke Fujiwara, Osamu Yamamoto, Shinya Nakamura, Atsunori Hubert-Ferrari, Aurélia Heyvaert, Vanessa De Batist, Marc |
author_sort |
Nemoto, Karin |
title |
Quartz flux at Lake Motosu Site MOT15-2 |
title_short |
Quartz flux at Lake Motosu Site MOT15-2 |
title_full |
Quartz flux at Lake Motosu Site MOT15-2 |
title_fullStr |
Quartz flux at Lake Motosu Site MOT15-2 |
title_full_unstemmed |
Quartz flux at Lake Motosu Site MOT15-2 |
title_sort |
quartz flux at lake motosu site mot15-2 |
publisher |
PANGAEA |
publishDate |
2024 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.965002 https://doi.org/10.1594/PANGAEA.965002 |
op_coverage |
LATITUDE: 35.450000 * LONGITUDE: 138.580000 * DATE/TIME START: 2015-11-01T00:00:00 * DATE/TIME END: 2015-11-01T00:00:00 * MINIMUM DEPTH, sediment/rock: 0.040 m * MAXIMUM DEPTH, sediment/rock: 3.595 m |
long_lat |
ENVELOPE(138.580000,138.580000,35.450000,35.450000) |
genre |
Arctic |
genre_facet |
Arctic |
op_relation |
Nemoto, Karin; Yokoyama, Yusuke; Obrochta, Stephen P; Miyairi, Yosuke; Fujiwara, Osamu; Yamamoto, Shinya; Nakamura, Atsunori; Hubert-Ferrari, Aurélia; Heyvaert, Vanessa; De Batist, Marc (in review): Reductions of Aeolian Dust accumulation in Lake Motosu, Mt. Fuji during the Last 8,000 Years Related to a Change in the Path of the Westerlies Associated with Prolonged Negative Arctic Oscillation Phase. Paleoceanography and Paleoclimatology Obrochta, Stephen P; Yokoyama, Yusuke; Yoshimoto, Mitsuhiro; Yamamoto, Shinya; Miyairi, Yosuke; Nagano, Gen; Nakamura, Atsunori; Tsunematusu, Kae; Lamair, Laura; Hubert-Ferrari, Aurélia; Lougheed, Bryan C; Yasuda, Atsushi; Hokanishi, Natsumi; Heyvaer, Vanessa; De Batist, Marc; Fujiwara, Osamu; The QuakeRecNankai Team (2018): Widespread Tephra geochemistry, Lake Motosu Site MOT15-2 age model, and Mt. Fuji eruption ages [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.893286 https://doi.pangaea.de/10.1594/PANGAEA.965002 https://doi.org/10.1594/PANGAEA.965002 |
op_rights |
CC-BY-4.0: Creative Commons Attribution 4.0 International Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.96500210.1594/PANGAEA.893286 |
_version_ |
1810293842525552640 |
spelling |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.965002 2024-09-15T17:51:50+00:00 Quartz flux at Lake Motosu Site MOT15-2 Nemoto, Karin Yokoyama, Yusuke Obrochta, Stephen P Miyairi, Yosuke Fujiwara, Osamu Yamamoto, Shinya Nakamura, Atsunori Hubert-Ferrari, Aurélia Heyvaert, Vanessa De Batist, Marc LATITUDE: 35.450000 * LONGITUDE: 138.580000 * DATE/TIME START: 2015-11-01T00:00:00 * DATE/TIME END: 2015-11-01T00:00:00 * MINIMUM DEPTH, sediment/rock: 0.040 m * MAXIMUM DEPTH, sediment/rock: 3.595 m 2024 text/tab-separated-values, 872 data points https://doi.pangaea.de/10.1594/PANGAEA.965002 https://doi.org/10.1594/PANGAEA.965002 en eng PANGAEA Nemoto, Karin; Yokoyama, Yusuke; Obrochta, Stephen P; Miyairi, Yosuke; Fujiwara, Osamu; Yamamoto, Shinya; Nakamura, Atsunori; Hubert-Ferrari, Aurélia; Heyvaert, Vanessa; De Batist, Marc (in review): Reductions of Aeolian Dust accumulation in Lake Motosu, Mt. Fuji during the Last 8,000 Years Related to a Change in the Path of the Westerlies Associated with Prolonged Negative Arctic Oscillation Phase. Paleoceanography and Paleoclimatology Obrochta, Stephen P; Yokoyama, Yusuke; Yoshimoto, Mitsuhiro; Yamamoto, Shinya; Miyairi, Yosuke; Nagano, Gen; Nakamura, Atsunori; Tsunematusu, Kae; Lamair, Laura; Hubert-Ferrari, Aurélia; Lougheed, Bryan C; Yasuda, Atsushi; Hokanishi, Natsumi; Heyvaer, Vanessa; De Batist, Marc; Fujiwara, Osamu; The QuakeRecNankai Team (2018): Widespread Tephra geochemistry, Lake Motosu Site MOT15-2 age model, and Mt. Fuji eruption ages [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.893286 https://doi.pangaea.de/10.1594/PANGAEA.965002 https://doi.org/10.1594/PANGAEA.965002 CC-BY-4.0: Creative Commons Attribution 4.0 International Access constraints: unrestricted info:eu-repo/semantics/openAccess Calculated Calculated according to age-depth model of Obrochta et al. (2018) COMPCORE Composite Core Density DEPTH sediment/rock bottom/maximum top/minimum Gas Pycnometer Micromeritics AccuPyc II 1340 JSPS KAKENHI KAKENHI LATITUDE LONGITUDE MOT15-2 Peak area total quartz flux Quartz (peak area) Sedimentation rate X-ray diffraction (XRD) dataset 2024 ftpangaea https://doi.org/10.1594/PANGAEA.96500210.1594/PANGAEA.893286 2024-08-13T23:45:38Z Quantitative X-ray diffraction (XRD) analysis was performed on 109 samples to determine the amount of quartz in MOT15-2 core using a Bruker D2 Phaser at the Atmosphere and Ocean Research Institute, The University of Tokyo. Slit width was 0.4 mm, and with a 4˚ soller slit. Measurements were performed between 20˚ and 35˚ 2θ at a 0.01˚ step for 0.2 seconds per step. The area of the quartz peak (~26.6˚) was determined by trapezoidal numerical integration using MATLAB. Prior to XRD measurement, samples were first pretreated with H₂O₂ to dissolve organic matter, then treated with sodium hexametaphosphate to disaggregate the clay minerals. Next, samples were centrifuged for 5 minutes to settle particles coarser than 2 µm. The supernatant solution was reserved for later clay-mineral analysis, which is not discussed in this study. Samples were dried, crushed, and packed into measurement holders. Six standards were prepared for quantitative conversion of peak area to mineral percentage by mixing known amounts of quartz (Quartz Granular from Wako Pure Chemical Industries, Lot. SDE2986) and calcite (Calcium carbonate, 4N made by Kanto Kagaku, Lot. 208N2154). Calcite is used to dilute quartz because it is not naturally occurring in the lake and its peak does not interfere with quartz peaks. Standards consist of 5, 10, 15, 20, 25 and 30% quartz. These standards were measured under identical conditions as the samples. A linear model was fit to the known percentages and peak areas. Volume of samples freeze-dried in the cube was measured to obtain the quartz deposition flux by a Micromeritics Gas Pycnometer AccuPyc II (1340 series), which uses a substitution of He gas, at Atmosphere and Ocean Research Institute, University of Tokyo. We calculated quartz flux at Lake Motosu by multiplying obtained quartz percentage, dry bulk density and sedimentation rate. Volcanic layers are considered to be instantaneous when calculating sedimentation rate. Sedimentation rate is calculated using age-depth model provided by Obrochta et al. ... Dataset Arctic PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(138.580000,138.580000,35.450000,35.450000) |