(Table T1) Paleomagnetic characterization of sedimentary rocks from ODP Hole 198-1213B

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Main Authors:	Sager, William W, Evans, Helen F, Channell, James E T
Format:	Dataset Open Access
Language:	en
Published:	PANGAEA 2005
Subjects:	198-1213B; ChRM, Inclination; Demagnetization step; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Joides Resolution; Leg198; Magnetometer, DC-SQUID, 2G Enterprises; Maximum angular deviation; North Pacific Ocean; NRM, Intensity; NRM, median destructive field of natural remanent magnetization, alternating field; Number; Ocean Drilling Program; ODP; Polarity; Principal component analyses (PCA); Sample code/label; Single sample demagnetization
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_version_	1867168104160690176
author	Sager, William W Evans, Helen F Channell, James E T
author_facet	Sager, William W Evans, Helen F Channell, James E T
collection	Datos científicos de ciencias marinas y ambientales
contents	Coring in Hole 1213B on the south flank of Shatsky Rise recovered sedimentary rocks (chalk and claystone) of earliest Cretaceous (Berriasian) age. Because few samples of this age are available for the Pacific plate, this recovery provides an opportunity to use paleomagnetism to determine a value for the paleolatitude of the site and of the Pacific plate for Berriasian time. A total of 22 vertically oriented samples were measured, yielding consistent alternating-field demagnetization results and low paleoinclination values consistent with magnetization near the equator. Samples can be grouped by inclination sign to produce a magnetic stratigraphy. If negative inclinations are assumed to represent reversed polarity (i.e., the site was magnetized north of the equator), the result is consistent with the Berriasian reversal timescale, which contains more reversed polarity (Chrons M16r-M18r) than normal polarity. Likewise, the assumption of a Northern Hemisphere magnetization produces a paleoinclination (9.1° + 13.6°/-14.2°; N = 17) and paleolatitude (4.6° + 7.2°/-6.9°) that is consistent with independent Pacific paleomagnetic data of Late Jurassic and Early Cretaceous age. This paleolatitude implies that the Pacific Apparent Polar Wander Path trends southward from this time until the mid-Cretaceous.
format	Dataset Open Access
id	pangaea_https___doi_org_10_1594_PANGAEA_778257
institution	PANGAEA
language	en
publishDate	2005
publisher	PANGAEA
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spellingShingle	(Table T1) Paleomagnetic characterization of sedimentary rocks from ODP Hole 198-1213B Sager, William W Evans, Helen F Channell, James E T 198-1213B; ChRM, Inclination; Demagnetization step; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Joides Resolution; Leg198; Magnetometer, DC-SQUID, 2G Enterprises; Maximum angular deviation; North Pacific Ocean; NRM, Intensity; NRM, median destructive field of natural remanent magnetization, alternating field; Number; Ocean Drilling Program; ODP; Polarity; Principal component analyses (PCA); Sample code/label; Single sample demagnetization Coring in Hole 1213B on the south flank of Shatsky Rise recovered sedimentary rocks (chalk and claystone) of earliest Cretaceous (Berriasian) age. Because few samples of this age are available for the Pacific plate, this recovery provides an opportunity to use paleomagnetism to determine a value for the paleolatitude of the site and of the Pacific plate for Berriasian time. A total of 22 vertically oriented samples were measured, yielding consistent alternating-field demagnetization results and low paleoinclination values consistent with magnetization near the equator. Samples can be grouped by inclination sign to produce a magnetic stratigraphy. If negative inclinations are assumed to represent reversed polarity (i.e., the site was magnetized north of the equator), the result is consistent with the Berriasian reversal timescale, which contains more reversed polarity (Chrons M16r-M18r) than normal polarity. Likewise, the assumption of a Northern Hemisphere magnetization produces a paleoinclination (9.1° + 13.6°/-14.2°; N = 17) and paleolatitude (4.6° + 7.2°/-6.9°) that is consistent with independent Pacific paleomagnetic data of Late Jurassic and Early Cretaceous age. This paleolatitude implies that the Pacific Apparent Polar Wander Path trends southward from this time until the mid-Cretaceous.
title	(Table T1) Paleomagnetic characterization of sedimentary rocks from ODP Hole 198-1213B
topic	198-1213B; ChRM, Inclination; Demagnetization step; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Joides Resolution; Leg198; Magnetometer, DC-SQUID, 2G Enterprises; Maximum angular deviation; North Pacific Ocean; NRM, Intensity; NRM, median destructive field of natural remanent magnetization, alternating field; Number; Ocean Drilling Program; ODP; Polarity; Principal component analyses (PCA); Sample code/label; Single sample demagnetization
url	https://doi.org/10.1594/PANGAEA.778257

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