Proceedings of the Ocean Drilling Program 1992
DOI: 10.2973/odp.proc.sr.129.142.1992
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Milankovitch Cycles in Upper Jurassic and Lower Cretaceous Radiolarites of the Equatorial Pacific: Spectral Analysis and Sedimentation Rate Curves

Abstract: Periodic changes in depositional environments due to Milankovitch astronomical climate cycles can cause cyclic patterns in sedimentation properties as recorded by logging data. Ocean Drilling Program Site 801 recovered Callovian (upper Middle Jurassic) through Valanginian (Lower Cretaceous) clayey radiolarites, originally deposited in a near-equatorial setting. Cycles of variable concentration of radiolarians and clay, and associated changes in degree of silicification were apparent in the geophysical logs, es… Show more

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Cited by 19 publications
(15 citation statements)
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References 47 publications
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“…This rate of sedimentation is comparable with data on the sedimentation rates of different Mesozoic and Cenozoic ribbon-banded radiolarites (Molinie & Ogg, 1992) and comparable with those from zones of modern accumulations of radiolarian oozes, despite the fact that modern oozes contain a significant siliciclasitic input (Sadler, 1981;Schindel, 1980). This rate of sedimentation is comparable with data on the sedimentation rates of different Mesozoic and Cenozoic ribbon-banded radiolarites (Molinie & Ogg, 1992) and comparable with those from zones of modern accumulations of radiolarian oozes, despite the fact that modern oozes contain a significant siliciclasitic input (Sadler, 1981;Schindel, 1980).…”
Section: C Eutrophic Oceanssupporting
confidence: 86%
“…This rate of sedimentation is comparable with data on the sedimentation rates of different Mesozoic and Cenozoic ribbon-banded radiolarites (Molinie & Ogg, 1992) and comparable with those from zones of modern accumulations of radiolarian oozes, despite the fact that modern oozes contain a significant siliciclasitic input (Sadler, 1981;Schindel, 1980). This rate of sedimentation is comparable with data on the sedimentation rates of different Mesozoic and Cenozoic ribbon-banded radiolarites (Molinie & Ogg, 1992) and comparable with those from zones of modern accumulations of radiolarian oozes, despite the fact that modern oozes contain a significant siliciclasitic input (Sadler, 1981;Schindel, 1980).…”
Section: C Eutrophic Oceanssupporting
confidence: 86%
“…This Milankovitch cycle produces cyclic changes in global climate and ocean fertility and temperature (e.g., Molinie andOgg, 1992a, 1992b). The predicted magnitude of these Milankovitch-induced oscillations of sea-level in nonglacial intervals is probably equivalent to the combined effect of ocean thermohaline volume changes (-0.1-10 m, depending upon the magnitude of cyclical heating and cooling of deep ocean waters) and postulated changes in groundwater storage on the continents (up to 10-20 m; Revelle, 1990;Hay and Leslie, 1990;Plint et al, 1992).…”
Section: Model Of Depositional Faciesmentioning
confidence: 99%
“…The FMS tool creates high-resolution images of the borehole by measuring the electrical resistivity contrast across an array of small electrodes (Ekstrom et al, 1986;Pezard and Luthi, 1988;Bourke et al, 1989;Molinie and Ogg, 1992b). The ODP FMS has four orthogonal pads containing 16 pad-mounted button electrodes that are pressed against the borehole.…”
Section: Processing Of Formation Microscanner Resistivity Imagerymentioning
confidence: 99%
See 1 more Smart Citation
“…Denomina-se neste estudo de índice colorimétrico os dados numéricos que representam as variações de cores das litologias recuperadas no testemunho. Atualmente, existe um grande número de estudos cicloestratigráficos realizados em séries temporais que representam as variações de cores, comprovando a eficiência destas técnicas (Busch, 1991;Molinie & Ogg, 1992;Sageman et al,1997;Yang & Kominz, 1999;Balsam et al, 1999). A análise espectral das curvas que expressam o índice colorimétrico segue o método descrito em Sageman et ai.…”
Section: Na Prática Pequenos Valores De (1) Produzem Wavelets Deunclassified