Short-term spectral analysis of ODP Hole 114-704B
Short-term spectral analysis was carried out on geochemical logging data from ODP Site 704. The FFT was used to compute the amplitude spectra of short-term overlapping segments to produce depth-period-amplitude spectrograms of the logging data. The spectrograms provided a means of evaluating the sig...
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1991
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.754805 2023-05-15T18:21:09+02:00 Short-term spectral analysis of ODP Hole 114-704B Mwenifumbo, C J Blangy, J P LATITUDE: -46.880000 * LONGITUDE: 7.420500 * DATE/TIME START: 1987-04-26T06:45:00 * DATE/TIME END: 1987-05-03T10:14:00 1991-12-08 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.754805 https://doi.org/10.1594/PANGAEA.754805 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.754805 https://doi.org/10.1594/PANGAEA.754805 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Mwenifumbo, C J; Blangy, J P (1991): Short-Term spectral analysis of downhole logging measurements from Site 704. In: Ciesielski, PF; Kristoffersen, Y; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 114, 577-585, https://doi.org/10.2973/odp.proc.sr.114.166.1991 114-704B DRILL Drilling/drill rig Joides Resolution Leg114 Ocean Drilling Program ODP South Atlantic Ocean Dataset 1991 ftpangaea https://doi.org/10.1594/PANGAEA.754805 https://doi.org/10.2973/odp.proc.sr.114.166.1991 2023-01-20T07:31:59Z Short-term spectral analysis was carried out on geochemical logging data from ODP Site 704. The FFT was used to compute the amplitude spectra of short-term overlapping segments to produce depth-period-amplitude spectrograms of the logging data. The spectrograms provided a means of evaluating the significance of the observed periodic components. The periodic components that were consistently present and prominent across a given record interval were considered to be significant. Changes in the spectrogram characteristics seem to reflect changes in either lithology, sedimentation rates, or hiatuses and may therefore provide useful information to aid in stratigraphic and paleoenvironmental studies. The dominant periodicity during the late Pleistocene and Brunhes Chron (0.97 to 0.47 Ma) was determined to be > 100,000 yr whereas the upper Matuyama Chron was dominated by the 41,000-yr periodicity. These periodicities suggest that the sedimentation patterns within the upper Matuyama Chron (0.98-1.78 Ma) were influenced by the Milankovitch obliquity cycle and those within the latest Matuyama-Brunhes Chron (<0.98 Ma) by the eccentricity cycle. The Brunhes/Matuyama boundary therefore represents a major discontinuity. Periodicities observed within the lower Matuyama and the upper Gauss Chron did not correlate with any of the periodicities within the Milankovitch frequency bands. Dataset South Atlantic Ocean PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(7.420500,7.420500,-46.880000,-46.880000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
114-704B DRILL Drilling/drill rig Joides Resolution Leg114 Ocean Drilling Program ODP South Atlantic Ocean |
spellingShingle |
114-704B DRILL Drilling/drill rig Joides Resolution Leg114 Ocean Drilling Program ODP South Atlantic Ocean Mwenifumbo, C J Blangy, J P Short-term spectral analysis of ODP Hole 114-704B |
topic_facet |
114-704B DRILL Drilling/drill rig Joides Resolution Leg114 Ocean Drilling Program ODP South Atlantic Ocean |
description |
Short-term spectral analysis was carried out on geochemical logging data from ODP Site 704. The FFT was used to compute the amplitude spectra of short-term overlapping segments to produce depth-period-amplitude spectrograms of the logging data. The spectrograms provided a means of evaluating the significance of the observed periodic components. The periodic components that were consistently present and prominent across a given record interval were considered to be significant. Changes in the spectrogram characteristics seem to reflect changes in either lithology, sedimentation rates, or hiatuses and may therefore provide useful information to aid in stratigraphic and paleoenvironmental studies. The dominant periodicity during the late Pleistocene and Brunhes Chron (0.97 to 0.47 Ma) was determined to be > 100,000 yr whereas the upper Matuyama Chron was dominated by the 41,000-yr periodicity. These periodicities suggest that the sedimentation patterns within the upper Matuyama Chron (0.98-1.78 Ma) were influenced by the Milankovitch obliquity cycle and those within the latest Matuyama-Brunhes Chron (<0.98 Ma) by the eccentricity cycle. The Brunhes/Matuyama boundary therefore represents a major discontinuity. Periodicities observed within the lower Matuyama and the upper Gauss Chron did not correlate with any of the periodicities within the Milankovitch frequency bands. |
format |
Dataset |
author |
Mwenifumbo, C J Blangy, J P |
author_facet |
Mwenifumbo, C J Blangy, J P |
author_sort |
Mwenifumbo, C J |
title |
Short-term spectral analysis of ODP Hole 114-704B |
title_short |
Short-term spectral analysis of ODP Hole 114-704B |
title_full |
Short-term spectral analysis of ODP Hole 114-704B |
title_fullStr |
Short-term spectral analysis of ODP Hole 114-704B |
title_full_unstemmed |
Short-term spectral analysis of ODP Hole 114-704B |
title_sort |
short-term spectral analysis of odp hole 114-704b |
publisher |
PANGAEA |
publishDate |
1991 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.754805 https://doi.org/10.1594/PANGAEA.754805 |
op_coverage |
LATITUDE: -46.880000 * LONGITUDE: 7.420500 * DATE/TIME START: 1987-04-26T06:45:00 * DATE/TIME END: 1987-05-03T10:14:00 |
long_lat |
ENVELOPE(7.420500,7.420500,-46.880000,-46.880000) |
genre |
South Atlantic Ocean |
genre_facet |
South Atlantic Ocean |
op_source |
Supplement to: Mwenifumbo, C J; Blangy, J P (1991): Short-Term spectral analysis of downhole logging measurements from Site 704. In: Ciesielski, PF; Kristoffersen, Y; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 114, 577-585, https://doi.org/10.2973/odp.proc.sr.114.166.1991 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.754805 https://doi.org/10.1594/PANGAEA.754805 |
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.754805 https://doi.org/10.2973/odp.proc.sr.114.166.1991 |
_version_ |
1766200282899808256 |