Chronology and correlation of Quaternary magnetostratigraphy and nannofossil biostratigraphy in Norwegian-Greenland Sea sediments

Bleil, Ulrich; Gard, Gunilla

doi:10.1007/bf01829339

Cited by 73 publications

(48 citation statements)

References 22 publications

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“…Hence it is incorrect to correlate the 80 ka lava excursion to the Blake excursion. Possible candidates of excursion are the one found from sediments of NorwegianGreenland Sea and Arctic Ocean, which are stratigraphically between the Laschamp and the Blake excursions (Bleil and Gard, 1989;Nowaczyk et al, 1994). This excursion might also be recorded in the 1 km core of Hawaii lavas by Holt et al (1996), because, if the inclination record is carefully examined, anomalously low inclination (No.…”

Section: Discussionmentioning

confidence: 99%

Paleomagnetism of the late Quaternary Ontake Volcano, Japan: directions, intensities, and excursions

Tanaka

Kobayashi

2014

Earth Planet Sp

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Study of paleosecular variation was carried out to mostly andesite lavas from the late Quaternary Ontake Volcano which have detailed stratigraphy and accurate radiometric ages. Among 42 sites, some of the results from lava successions were combined due to possible equivalent ages, remaining 35 sites. After excluding two low latitude VGPs, angular dispersion of 15.6• was obtained for a period which is accurately confined between 20 ka and 90 ka. The obtained angular dispersion is not different from the typical value for the last 5 my, and this is not surprising if we consider that the global paleointensity was not necessarily low and rather oscillatory during the period of 40-100 ka which precedes the global low in 20-40 ka. Two low latitude VGPs from 48 ka lava (41.9• N, 196.2• E) and 80 ka lava (15.9• N, 183.3• E) indicate existence of excursions in Japan during the latest Pleistocene. Preliminary paleointensity experiments indicate that the 80 ka excursion is accompanied by a low paleointensity of about 5 μT while the 48 ka one is not. These two excursions are probably related to those reported previously not only from the Ontake Volcano and its proximity but also from other several sites in Japan, although they were not conclusive. The 48 ka excursion probably correlates to the Laschamp excursion. This is consistent with the fact that the VGP position from the 48 ka lava comes to the central Pacific region, similar to those from the Laschamp excursion found in New Zealand. Possible correlation of the 80 ka excursion is the one from Norwegian-Greenland Sea and Arctic Ocean, which are stratigraphically between the Laschamp and the Blake excursions.

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Section: Discussionmentioning

confidence: 99%

Paleomagnetism of the late Quaternary Ontake Volcano, Japan: directions, intensities, and excursions

Tanaka

Kobayashi

2014

Earth Planet Sp

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“…Closed circles in the Kolbeinsey Ridge area indicate sites of sediment cores investigated in this study and open circles sites investigated by Bleil and Gard (1989). Depth intervals are in thousands of metres Kolbeinsey Ridge area between Iceland and Jan Mayen ( Fig.…”

Section: Methodsmentioning

confidence: 98%

“…The same was done for three sediment cores from the Fram Strait area (site PS 1535) at 797N (Nowaczyk 1991;Nowaczyk and Baumann 1992). Included is also the event chronology of five cores investigated by Bleil and Gard (1989), displayed just as a simple black-and-white pattern in the middle of Fig. 14. Because neither susceptibility data nor a detailed age model is supplied in Bleil and Gard (1989), the cores could not be compared directly with the new cores of this study and the Fram Strait cores.…”

Section: Data Transformationsmentioning

confidence: 98%

Geomagnetic events and relative palaeointensity variations during the past 300 ka as recorded in Kolbeinsey Ridge sediments, Iceland Sea: indication for a strongly variable geomagnetic field

Nowaczyk¹,

Frederichs²

1999

International Journal of Earth Sciences

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Magnetostratigraphic analyses of five sediment cores recovered from the Kolbeinsey Ridge area revealed consistent records of several geomagnetic events linked with low relative palaeointensities within the past 300 ka. Interpretation of various rock magnetic parameters clearly rule out the possibility that the recorded non-normal polarity directions are linked to a deviating magnetomineralogical fraction or a distorted magnetic fabric. Therefore, these directions are interpreted as true recordings of geomagnetic field variations. Hysteresis parameters and thermomagnetic measurements revealed pure pseudo single-domain (PSD) magnetite with Curie temperatures of 580 7C as the dominant remanence carrier mineral. Due to the homogeneity of the rock magnetic parameters, the sediments are also suitable for relative palaeointensity determinations. Oxygen-isotope stratigraphies for two of the cores provided a time frame to estimate the age ranges for the recorded geomagnetic field variations. The obtained record of ten events of up to 12 ka duration during the past 300 ka and the related record of relative palaeointensity indicate a fairly dynamic character of the Earth's magnetic field, which is in clear contrast to published polarity time scales.

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“…3 . Investigations of sediments from the northern high latitudes yielded increasing evidence that the geomagnetic Brunhes Chron has been interrupted by a Ž series of short excursions and polarity events Bleil and Gard, 1989;Løvlie, 1989a,b;Løvlie et al, 1986;Schneider et al, 1996;Nowaczyk and Antonow, . 1997;Nowaczyk et al, 1994 .…”

Section: Biomarker Analysismentioning

confidence: 99%

A multiproxy approach to reconstruct the environmental changes along the Eurasian continental margin over the last 150 000 years

et al. 2000

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Chronology and correlation of Quaternary magnetostratigraphy and nannofossil biostratigraphy in Norwegian-Greenland Sea sediments

Cited by 73 publications

References 22 publications

Paleomagnetism of the late Quaternary Ontake Volcano, Japan: directions, intensities, and excursions

Paleomagnetism of the late Quaternary Ontake Volcano, Japan: directions, intensities, and excursions

Geomagnetic events and relative palaeointensity variations during the past 300 ka as recorded in Kolbeinsey Ridge sediments, Iceland Sea: indication for a strongly variable geomagnetic field

A multiproxy approach to reconstruct the environmental changes along the Eurasian continental margin over the last 150 000 years

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