Snapshot of the Matuyama-Brunhes reversal process recorded in 40 Ar/39 Ar-dated lavas from Guadeloupe, West Indies
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The Kamikatsura event and the Matuyama-Brunhes reversal recorded in lavas from Tjörnes Peninsula, northern Iceland
We report paleomagnetic results from four overlapping stratigraphic sections (55 flows) through the lava pile in Tjörnes peninsula (North Iceland). The initial aim of our study was to check the existence of intermediate directions previously interpreted as belonging to the Matuyama-Brunhes geomagnetic reversal (MBR), and complete this record with ThellierThellier paleointensity determinations a...
متن کاملMatuyama – Brunhes reversal and Kamikatsura event on Maui : paleomagnetic directions , 40 Ar / 39 Ar ages and implications $
Eighty-nine basaltic lava flows from the northwest wall of Haleakala caldera preserve a concatenated paleomagnetic record of portions of the Matuyama–Brunhes (M–B) reversal and the preceding Kamikatsura event as well as secular variation of the full-polarity reversed and normal geomagnetic field. They provide the most detailed volcanic record to date of the M–B transition. The 24 flows in the t...
متن کاملA detailed paleomagnetic and rock-magnetic investigation of the Matuyama-Brunhes geomagnetic reversal recorded in the tephra-paleosol sequence of Tlaxcala (Central Mexico)
Citation: Soler-Arechalde AM, Goguitchaichvili A, Carrancho Á, Sedov S, Caballero-Miranda CI, Ortega B, Solis B, Morales Contreras JJ, Urrutia-Fucugauchi J and Bautista F (2015) A detailed paleomagnetic and rock-magnetic investigation of the Matuyama-Brunhes geomagnetic reversal recorded in the tephra-paleosol sequence of Tlaxcala (Central Mexico). Front. Earth Sci. 3:11. doi: 10.3389/feart.201...
متن کاملDating transitionally magnetized lavas of the late Matuyama Chron: Toward a new Ar/Ar timescale of reversals and events
The K-Ar based geomagnetic polarity timescale was constructed using data from lavas and tuffs that bracketed, but rarely dated, the transitions between polarity intervals. Subsequent Ar/Ar dating indicated that the ages of some polarity transitions had been underestimated by about 6%. Although the accepted ages of the polarity chron boundaries have increased, their precise temporal definition r...
متن کاملHigh-resolution record of the Matuyama-Brunhes transition constrains the age of Javanese Homo erectus in the Sangiran dome, Indonesia.
A detailed paleomagnetic study conducted in the Sangiran area, Java, has provided a reliable age constraint on hominid fossil-bearing formations. A reverse-to-normal polarity transition marks a 7-m thick section across the Upper Tuff in the Bapang Formation. The transition has three short reversal episodes and is overlain by a thick normal polarity magnetozone that was fission-track dated to th...
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ژورنال
عنوان ژورنال: Geochemistry, Geophysics, Geosystems
سال: 2013
ISSN: 1525-2027
DOI: 10.1002/ggge.20263