, 2021 The knowledge of the secular variation of the geomagnetic field at different time scales is important to determine the mechanisms that maintain the geomagnetic field and can help to establish constraints in dynamo theories.
A. González-López +5 more
semanticscholar +1 more source
Paleomagnetism, rock magnetism and geochemical aspects of early Cretaceous basalts of the Paraná Magmatic Province, from Misiones, Argentina [PDF]
, 2006 The basalts of the Posadas Formation were extruded during the huge continental volcanism that affected the Parana Basin in the Lower Cretaceous. We have carried out a paleomagnetic and rock-magnetic study on samples collected along a basalt outcrop ...
Lagorio, Silvia Leonor +2 more
core +1 more source
More stable yet bimodal geodynamo during the Cretaceous superchron?
Geophysical Research Letters, 2016 We report palaeomagnetic and 40Ar/39Ar dating results from two sequences of basaltic lava flows deposited at the same locality in western China, yet separated in time by ~50 Myr: one set lies within the Cretaceous normal superchron at 112–115 Ma and a ...
Florian Lhuillier +8 more
doaj +1 more source
Detection and correction of inclination shallowing in deep sea sediments using the anisotropy of anhysteretic remanence [PDF]
, 1993 Paleomagnetic data from recent Pleistocene to recent deep sea sediments from the continental rise of eastern North America exhibit a cyclical inclination shallowing, up to 30° with respect to the geocentric axial dipole value. This shallowing is strongly
Collombat, Helene +2 more
core +2 more sources
First paleomagnetic results of mid-to late Holocene sediments from Lake Issyk-Kul (Kyrgyzstan): Implications for paleosecular variation in central Asia [PDF]
, 2012 We present new paleomagnetic and rock magnetic data from mid and late Holocene sediments recovered in two gravity cores (C087 and C142a) from Lake Issyk-Kul (central Asia), for which independent radiocarbon-based age models are available.
Giralt, Santiago +3 more
core +1 more source
Paleosecular variation and the average geomagnetic field at ±20° latitude [PDF]
Geochemistry, Geophysics, Geosystems, 2006 We assembled a new paleomagnetic directional data set from lava flows and thin dikes for four regions centered on ±20° latitude: Hawaii, Mexico, the South Pacific, and Reunion. We investigate geomagnetic field behavior over the past 5 Myr and address whether geographical differences are recorded by our data set.
K. P. Lawrence +2 more
openaire +1 more source
Investigating Maar Formation and the climate history of Southern Argentina–the Potrok Aike Maar Lake Sediment Archive Drilling Project (PASADO) [PDF]
, 2006 Evidence is increasing that the Southern Ocean plays a key role in the global climate system. The southern hemisphere contains more than 90% of the world’s ice, and eighty-one percent of its total surface area is covered by oceans.
Corbella, Hugo +3 more
core +3 more sources
Paleomagnetic evidence for episodic construction of the Mamiyadake tephra ring
Earth, Planets and Space, 2023 Tephra rings that surround maar craters are typically inferred from field observations to have been emplaced rapidly over a time period of days to years and thus monogenetic, which is, however, rarely assessed quantitatively.
Yuki Yasuda
doaj +1 more source
Reconstructing Holocene geomagnetic field variation: new methods, models and implications [PDF]
, 2014 Reconstructions of the Holocene geomagnetic field and how it varies on millennial timescales are important for understanding processes in the core but may also be used to study long-term solar-terrestrial relationships and as relative dating tools for ...
Hill, M +4 more
core +1 more source