Zobrazeno 1 - 10
of 17
pro vyhledávání: '"Janna Riisager"'
Autor:
Asger K. Pedersen, Niels Abrahamsen, Peter Riisager, AG Schmidt, Janna Riisager, R Van der Voo
Publikováno v:
Bulletin of the Geological Society of Denmark. 52:27-38
The results of a paleomagnetic sampling carried out along two vertical profiles (altogether 19 lava flows, 126 samples) covering the entire stratigraphy of the Talerua Member lavas (similar to 39 Myr old) that outcrop on the island Hareoen are presen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::be7c192636e49d175ab5b308fbcad92e
https://doi.org/10.37570/bgsd-2005-52-04
https://doi.org/10.37570/bgsd-2005-52-04
Publikováno v:
Physics of the Earth and Planetary Interiors. 141:131-140
We present new Thellier–Thellier palaeointensity results from three cooling units (32 samples) of Inner Mongolia lava flows (91.7 Ma) emplaced during the Cretaceous Normal Superchron (CNS). Based on rock-magnetic and microscopy observations the mag
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d5ca77fab5dc604e44f2415672819078
https://doi.org/10.1016/j.pepi.2003.12.003
https://doi.org/10.1016/j.pepi.2003.12.003
Publikováno v:
Earth and Planetary Science Letters. 214:409-425
We present new paleomagnetic and multi-model stereo photogrammetry data from lava sequences in the West Greenland part of the North Atlantic igneous province (NAIP). The joint analyses of paleomagnetic and photogrammetric data yield a well-defined pa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5ca50484e2cb999ab5a337a6adaf26d3
https://doi.org/10.1016/s0012-821x(03)00367-4
https://doi.org/10.1016/s0012-821x(03)00367-4
Autor:
Avto Goguitchaichvili, Jaime Urrutia-Fucugauchi, Janna Riisager, Peter Riisager, Omar Ferreira Lopes, Luis M. Alva-Valdivia
Publikováno v:
Physics of the Earth and Planetary Interiors. 138:183-196
A paleomagnetic study was carried out along two sections (altogether 35 lava flows, 300 samples) in the central Parana Magmatic Province (PMP), Brazil. The two sections, distanced ca. 200 km apart, yield statistically indistinguishable paleomagnetic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::14dca88496040fb0e96b3061859b3761
https://doi.org/10.1016/s0031-9201(03)00158-4
https://doi.org/10.1016/s0031-9201(03)00158-4
Publikováno v:
Earth and Planetary Science Letters. 201:261-276
A paleomagnetic sampling was carried out along four sections (altogether 86 lava flows, 548 samples) in the North Atlantic Igneous Province outcropping in Faroe Islands, Denmark. The four polarity zones in the 700-m-thick exposed part of the Faroes l
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::83798237dcdbd535a64808dd96953992
https://doi.org/10.1016/s0012-821x(02)00720-3
https://doi.org/10.1016/s0012-821x(02)00720-3
Publikováno v:
Physics of the Earth and Planetary Interiors. 131:91-100
Based on palaeomagnetic and rock magnetic results, 108 samples from 27 flows from Palaeogene flood basalts of Faroe Islands were chosen for whole-rock Thellier palaeointensity experiments. Altogether 90 samples were rejected due to either chemical al
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2ed37368d977de30b74a170bedf02c76
https://doi.org/10.1016/s0031-9201(02)00031-6
https://doi.org/10.1016/s0031-9201(02)00031-6
Publikováno v:
Geophysical Journal International
Geophysical Journal International, Oxford University Press (OUP), 2002, 149, pp.44-63
Geophysical Journal International, Oxford University Press (OUP), 2002, 149, pp.44-63
20 pages, 15 figures, 3 tables; A refined palaeointensity experiment, accompanied by rock-magnetic studies, has been carried out on six lava flows from 1910 and 1928 from Mt. Etna. The purpose of the study was to try to understand why these very youn
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::341e670aa831bbe80ba3d9434ca9c4b1
https://doi.org/10.1046/j.1365-246x.2002.01619.x
https://doi.org/10.1046/j.1365-246x.2002.01619.x
Autor:
Peter Riisager, Janna Riisager
Publikováno v:
Physics of the Earth and Planetary Interiors. 125:111-117
The Thellier technique is the most commonly used method for absolute palaeointensity studies. It is based on Thellier’s laws stating that partial thermoremanent magnetisations (pTRMs) are independent and additive, which however only are true for no
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::04f5ee9e4fc258083857f2c8f819b3de
https://doi.org/10.1016/s0031-9201(01)00236-9
https://doi.org/10.1016/s0031-9201(01)00236-9
Publikováno v:
Journal of African Earth Sciences. 32:503-518
For a palaeomagnetic study of the Late Cretaceous flood basalts of Madagascar (age ∼ 88 Ma), 144 oriented drill cores from 15 sites located in the northwestern part of the island were sampled. Despite the very common occurrence of secondary isother
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::19ffd955b2280cc8205de4b8278bfa28
https://doi.org/10.1016/s0899-5362(01)90111-3
https://doi.org/10.1016/s0899-5362(01)90111-3
Publikováno v:
Journal of Geophysical Research: Solid Earth. 105:883-896
Paleomagnetic study of Miocene basalts and baked sediments from Velay Oriental, France, yields a paleomagnetic pole with coordinates 84.1°N, 171.2°E (A95 = 8.6°, K = 29, N = 11). The pole is supported by a positive reversal test, and it correspond
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4d9d3dcd0d20172bd5d4ff5bcd8769a6
https://doi.org/10.1029/1999jb900337
https://doi.org/10.1029/1999jb900337