Zobrazeno 1 - 10
of 44
pro vyhledávání: '"F. H. Chamalaun"'
Publikováno v:
Geochemistry, Geophysics, Geosystems. 15:509-515
[1] We discovered and mapped a 1200 km-long zone of enhanced electrical conductivity through a large array of magnetometers, over a narrow corridor parallel to the Paraguay and Araguaia belts which surround the Amazon craton. The anomaly has been fur
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6146689c0ffe56f5e2d407856c0f7a4e
https://doi.org/10.1002/2013gc004970
https://doi.org/10.1002/2013gc004970
Autor:
H. Porath, F. H. Chamalaun
Publikováno v:
Geophysical Journal of the Royal Astronomical Society. 14:451-462
Summary The results of a palaeomagnetic study on high-grade hematite ore bodies of South Australia are reported. The two major ore bodies, Iron Monarch and Iron Prince, gave consistent directions of magnetization with either steep to moderate negativ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0f2e5409ea29d2394974dfebb035aeec
https://doi.org/10.1111/j.1365-246x.1967.tb06263.x
https://doi.org/10.1111/j.1365-246x.1967.tb06263.x
Publikováno v:
Physics of the Earth and Planetary Interiors. 119:285-298
Magnetovariational (MV) data from 14 sites on a transect of the South Island of New Zealand are presented. The induction arrows clearly show the effects of induction in the surrounding oceans. Comparison with the responses of an analogue model of the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2f3d7a7b90945921bf8bed782ac9b5ec
https://doi.org/10.1016/s0031-9201(99)00173-9
https://doi.org/10.1016/s0031-9201(99)00173-9
Publikováno v:
GEOPHYSICS. 65:553-558
In recent years, considerable advances have taken place in aeromagnetic surveying. These improvements involved data acquisition (instruments and survey design), processing, and interpretation. In addition to improved spatial resolution, the high‐re
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::11b4ca06b17ed5346f3d76b7171e4b07
https://doi.org/10.1190/1.1444750
https://doi.org/10.1190/1.1444750
Publikováno v:
Physics of the Earth and Planetary Interiors. 116:105-115
A band across northern Queensland, Australia, was studied in 1995 by a magnetometer array experiment in two parts: a western part (Q1), and an eastern part (Q2). Forty-three sites were occupied in all, by Flinders University magnetometers which recor
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bd4b2970a14714d7e2146be2b65eb7c2
https://doi.org/10.1016/s0031-9201(99)00126-0
https://doi.org/10.1016/s0031-9201(99)00126-0
Autor:
Antonio L. Padilha, Augustinho Rigoti, F. H. Chamalaun, Nalin Babulal Trivedi, Ícaro Vitorello, B. R. Arora, Sergio L. Fontes
Publikováno v:
Tectonophysics. 302:57-69
A magnetometer array study in the north-northeast of Brazil has revealed a roughly NE–SW-trending conductive structure in the southeastern part of the intracratonic Parnaiba Basin. The magnetovariational response functions of this structure are num
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::addce95f80e2b2e2716ff0ca38f63bc7
https://doi.org/10.1016/s0040-1951(98)00272-8
https://doi.org/10.1016/s0040-1951(98)00272-8
Autor:
Ícaro Vitorello, B. R. Arora, Nalin Babulal Trivedi, Antonio L. Padilha, Augustinho Rigoti, F. H. Chamalaun
Publikováno v:
Pure and Applied Geophysics. 152:349-375
—Magnetovariational fields recorded by an array of magnetometers in the equatorial region of north-northeast Brazil are analyzed to infer the configuration of internal induced currents in and around the extensive intracratonic Parnaiba basin. Only
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::39431f2a1db77f7b11fb1834aad7aaf2
https://doi.org/10.1007/s000240050158
https://doi.org/10.1007/s000240050158
Publikováno v:
Earth, Planets and Space. 50:347-360
This study concerns the use of selected geomagnetic field records to establish the 1990 quiet-day current system (Sq) for Australia and to use the ionospheric current source of Sq for a determination of the Earth’s deep electrical conductivity. The
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f195242f99f2d357005aa12244529ffc
https://doi.org/10.1186/bf03352121
https://doi.org/10.1186/bf03352121
Autor:
B. R. Arora, J. M. Da Costa, S. L. G. Dutra, Nalin Babulal Trivedi, Augustinho Rigoti, F. H. Chamalaun, Antonio L. Padilha
Publikováno v:
Geophysical Research Letters. 24:1683-1686
Analysis of the globally coherent Pc5 geomagnetic pulsation event of March 24, 1991, from a chain of stations extending from the auroral oval to the equatorial region along the American sector, has shown unequivocal evidence on the enhancement of pul
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ee76a8874ce136a1cc174a3f8c411c49
https://doi.org/10.1029/97gl00215
https://doi.org/10.1029/97gl00215
Publikováno v:
Exploration Geophysics. 28:150-155
A range of sets of electromagnetic observational data (geomagnetic depth sounding and magnetotelluric sounding) now exist for the Australian continent. These data show regions of the continent where the conductivity structure is approximately one-dim
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::95449345e4202f20a52450681622e70f
https://doi.org/10.1071/eg997150
https://doi.org/10.1071/eg997150