Characterization of sulfide deposits by airborne magnetic and gamma-ray responses in eastern Finland

Airo, Meri-Liisa; Loukola-Ruskeeniemi, Kirsti

doi:10.1016/j.oregeorev.2003.08.008

Cited by 48 publications

(19 citation statements)

References 17 publications

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“…The latter interpretation was motivated by the attempt to explain the magnetic response of the BMA and the spatial correlation of the SCCB due to a common source. Although serpentinite is a candidate for a magnetic anomalous source, modern electrical conductivity measurements on serpentinite reveal it as a poor electrical conductor (Airo and Loukola-Ruskeeniemi, 2004). Our magnetic modelling studies support the existence of an 100 to 150 km broad and 25 km deep reaching magnetic source, but are not consistent with such narrow conductivity anomalies found in both profiles beneath the centre of the BMA.…”

Section: Discussioncontrasting

confidence: 80%

Comparison of electrical conductivity structures and 2D magnetic modelling along two profiles crossing the Beattie Magnetic Anomaly, South Africa

Weckmann

Jung

Branch

et al. 2007

South African Journal of Geology

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Section: Discussioncontrasting

confidence: 80%

Comparison of electrical conductivity structures and 2D magnetic modelling along two profiles crossing the Beattie Magnetic Anomaly, South Africa

Weckmann

Jung

Branch

et al. 2007

South African Journal of Geology

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“…Magnetic derivatives have been widely used in studying basement structure in Finland (e.g., Airo, 1999;Airo and Loukola-Ruskeeniemi, 2004;Lipponen and Airo, 2006;.…”

Section: Magnetic Lineamentsmentioning

confidence: 99%

Application of regional aeromagnetic data in targeting detailed fracture zones

Airo

Wennerström

2010

Journal of Applied Geophysics

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“…Airborne radiometric and magnetic surveys have been used extensively in the mineral exploration industry predominantly for the delineation of mineral deposits [1]. Its application ranges from mineral exploration [2], structure mapping and rock characterization [3].…”

Section: Introductionmentioning

confidence: 99%

Geophysical Mapping, Geochemical Evidence and Mineralogy for Nuweibi Rare Metal Albite Granite, Eastern Desert, Egypt

Gaafar¹

2014

OJG

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The present study aims to shed light on the rare metals of Nuweibiareaalbite granite in the Eastern Desert through the chemical analyses of the two types of fine-grained albite granite (FAG) and medium-grained albite granite (MAG) in addition to mineralogical studies as well as ground spectrometric survey and aeromagnetic mapping. On the basis of ground spectrometric measurements K, eUand eTh distribution maps were obtained. The concentration of K, U and Th content shows maxima (4.5%, 13 ppm and 27 ppm on average, respectively) in the FAG, and (4.5%, 10 ppm and 35 ppm on average) in the MAG. The eU/eTh ratio significantly increases in FAG with higher magma differentiation than MAG reaching 0.63. This paper uses magnetic geophysical methods to investigate geometry and sense of motion across the Nuweibi area. The interpreted structures from the magnetic maps are characterized by two main intersecting sets of NW-SE and NE-SW trending faults in addition to other three minor faults that trend in N-S, NNW-SSE and ENE-WSW directions. The NW-SE trending faults represent the recent sets in the study area where they are dissected and displaced by the other old faults. The Werner depth map shows the interface depths of the granite and basement rocks that extend to great depths ranging from 10 to 380 m. FAG is extended underneath most of the surrounding schist rocks because of their attributed low magnetic intensity that confirmed also with drilling. Microscope and Microprobe analyses indicated that the most important radioactive minerals include uranothorite, thorite, zircon, and monazite. Columbite group minerals represent the most common Nb-Ta host in Nuweibi-albite granites that contain significant levels of Ta

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Characterization of sulfide deposits by airborne magnetic and gamma-ray responses in eastern Finland

Cited by 48 publications

References 17 publications

Comparison of electrical conductivity structures and 2D magnetic modelling along two profiles crossing the Beattie Magnetic Anomaly, South Africa

Comparison of electrical conductivity structures and 2D magnetic modelling along two profiles crossing the Beattie Magnetic Anomaly, South Africa

Application of regional aeromagnetic data in targeting detailed fracture zones

Geophysical Mapping, Geochemical Evidence and Mineralogy for Nuweibi Rare Metal Albite Granite, Eastern Desert, Egypt

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