MAGNETIC SUSCEPTIBILITY CYCLES IN UPPER PLIOCENE LACUSTRINE DEPOSITS OF THE NORTHERN APENNINES, ITALY

2004 ◽  
pp. 263-274 ◽  
Author(s):  
GIOVANNI NAPOLEONE ◽  
ANDREA ALBIANELLI ◽  
ALFRED G. FISCHER
Keyword(s):  
Magnetic Susceptibility ◽  
Northern Apennines ◽  
Lacustrine Deposits

scholarly journals Application of anisotropy of magnetic susceptibility (AMS) fabrics to determine the kinematics of active tectonics: examples from the Betic Cordillera, Spain, and the Northern Apennines, Italy

Solid Earth ◽  
2021 ◽  
Vol 12 (5) ◽  
pp. 1125-1142
Author(s):  
David J. Anastasio ◽  
Frank J. Pazzaglia ◽  
Josep M. Parés ◽  
Kenneth P. Kodama ◽  
Claudio Berti ◽  
...  
Keyword(s):  
Magnetic Susceptibility ◽  
Sierra Nevada ◽  
Plate Boundary ◽  
Active Tectonics ◽  
Anisotropy Of Magnetic Susceptibility ◽  
Northern Apennines ◽  
Alluvial Fan ◽  
Betic Cordillera ◽  
Tectonic Deformation ◽  
Gps Geodesy

Abstract. The anisotropy of magnetic susceptibility (AMS) technique provides an effective way to measure fabrics and, in the process, interpret the kinematics of actively deforming orogens. We collected rock fabric data of alluvial fan sediments surrounding the Sierra Nevada massif, Spain, and a broader range of Cenozoic sediments and rocks across the Northern Apennine foreland, Italy, to explore the deformation fabrics that contribute to the ongoing discussions of orogenic kinematics. The Sierra Nevada is a regional massif in the hinterland of the Betic Cordillera. We recovered nearly identical kinematics regardless of specimen magnetic mineralogy, structural position, crustal depth, or time. The principal elongation axes are NE–SW in agreement with mineral lineations, regional GPS geodesy, and seismicity results. The axes trends are consistent with the convergence history of the Africa–Eurasia plate boundary. In Italy, we measured AMS fabrics of specimens collected along a NE–SW corridor spanning the transition from crustal shortening to extension in the Northern Apennines. Samples have AMS fabrics compatible only with shortening in the Apennine wedge and have locked in penetrative contractional fabrics, even for those samples that were translated into the actively extending domain. In both regions, we found that specimens have a low degree of anisotropy and oblate susceptibility ellipsoids that are consistent with tectonic deformation superposed on compaction fabrics. Collectively, these studies demonstrate the novel ways that AMS can be combined with structural, seismic, and GPS geodetic data to resolve orogenic kinematics in space and time.

scholarly journals Application of anisotropy of magnetic susceptibility (AMS) fabrics to determine the kinematics of active tectonics: Examples from the Betic Cordillera, Spain and the northern Apennines, Italy

2021 ◽  
Author(s):  
David J. Anastasio ◽  
Frank J. Pazzaglia ◽  
Josep M. Parés ◽  
Kenneth P. Kodama ◽  
Claudio Berti ◽  
...  
Keyword(s):  
Magnetic Susceptibility ◽  
Sierra Nevada ◽  
Plate Boundary ◽  
Active Tectonics ◽  
Anisotropy Of Magnetic Susceptibility ◽  
Northern Apennines ◽  
Alluvial Fan ◽  
Betic Cordillera ◽  
Tectonic Deformation ◽  
Gps Geodesy

Abstract. The anisotropy of magnetic susceptibility (AMS) technique provides an effective way to measure fabrics and in the process, interpret the kinematics of actively deforming orogens. We collected rock fabric data of alluvial fan sediments surrounding the Sierra Nevada massif, Spain, and a broader range of Cenozoic sediments and rocks across the northern Apennine foreland, Italy, to explore the deformation fabrics that contribute to the ongoing discussions of orogenic kinematics. Sierra Nevada is a regional massif in the hinterland of the Betic Cordillera. We recovered nearly identical kinematics regardless of specimen magnetic minerology, structural position, crustal depth, or time. The principal elongation axes are NE-SW in agreement with mineral lineations, regional GPS geodesy, and seismicity results. The axes trends are consistent with the convergence history of the Africa-Eurasia plate boundary. In Italy, we measured AMS fabrics of specimens collected along a NE-SW corridor spanning the transition from crustal shortening to extension in the northern Apennines. Samples have AMS fabrics compatible only with shortening in the Apennine wedge and have locked in penetrative contractional fabrics, even for those samples that were translated into the actively extending domain. In both regions we found that specimens have a low degree of anisotropy and oblate susceptibility ellipsoids that are consistent with tectonic deformation superposed on compaction fabrics. Collectively, these studies demonstrate the novel ways that AMS can be combined with structural, seismic, and GPS geodetic data to resolve orogenic kinematics in space and time.

Red-coloured pedosediments of the Lori Basin, Armenia 

2021 ◽  
Author(s):  
Anna Revunova ◽  
Olga Khokhlova
Keyword(s):  
Magnetic Susceptibility ◽  
Volcanic Ash ◽  
Subtropical Climate ◽  
Basaltic Lava ◽  
Basalt Lava ◽  
Lacustrine Deposits ◽  
Cobalt Nickel ◽  
Rfbr Grant ◽  
Micromorphological Analysis

<p>In this work, the samples of red-coloured pedosediments were analyzed. They were found in two sections of the Lori Basin, Armenia - Kurtan-IV and Yagdan. Micromorphological analysis, the measurement of magnetic susceptibility, particle size distribution, CHN, determination of bulk, and biomorphic composition was made. Based on the results of previous studies, the age of the deposits overlying these sections was known. The pedosediment from the Kurtan-IV section is overlain by a mixture of sand and volcanic ash, which is dated at about 1.4 Ma (Calabrian). The pedosediment from the Yagdan section is overlain by 2-2.5 Ma basaltic lava (Gelasian). As a result of our research, it was revealed that both pedosediments were formed in conditions differ from current ones and have differences between themselves also. The pedosediment from the Yagdan section was formed during the dominance of the subtropical climate. It was revealed the presence of manganese-ferruginous and clayey films, a low index of carbonization and salinity, and a relatively high index of weathering. Pedo-sediments from the Yagdan section can be classified as Cambisols with vitric, argic, chromic qualifiers. By the time the later section Kurtan-IV was formed, the climate became cooler, which was reconstructed by the appearance of phytoliths of coniferous plants. Pedosediment from the Kurtan-IV section can be classified as Stagnic Luvisols. The later factors influencing the preservation of pedosediments and changes in their composition and properties were identified. Thus, the upper horizon of the Yagdan section sharply differs from the underlying ones in increased weathering and oxidation, and these properties are retained up to the third layer. It has increased indicators of magnetic susceptibility and the content of copper elements, cobalt, nickel, vanadium, chromium, which were brought in by basalt lava. The pedosediment from the Kurtan-IV section was overlain by lacustrine deposits, which led to a decrease in the magnetic susceptibility and an increase in the SiO<sub>2</sub> content and carbonation index. This work was supported by RFBR, grant N19-29-05024 mk.</p>

MAGNETIC SUSCEPTIBILITY AND ANISOTROPY OF THE ORGANIC SUPERCONDUCTOR (TMTSF)2ClO4

1983 ◽  
Vol 44 (C3) ◽  
pp. C3-893-C3-901 ◽  
Author(s):  
M. Miljak ◽  
J. R. Cooper ◽  
K. Bechgaard
Keyword(s):  
Magnetic Susceptibility ◽  
Organic Superconductor

Magnetic susceptibility of dilute alloys of rare earths in magnesium

1979 ◽  
Vol 40 (C5) ◽  
pp. C5-17-C5-18
Author(s):  
M. de Jong ◽  
P. Touborg ◽  
J. Bijvoet
Keyword(s):  
Magnetic Susceptibility ◽  
Rare Earths ◽  
Dilute Alloys

Magnetic susceptibility of U1-xThxAl2

1979 ◽  
Vol 40 (C4) ◽  
pp. C4-147-C4-149 ◽  
Author(s):  
M. B. Brodsky
Keyword(s):  
Magnetic Susceptibility
Sign in / Sign up

Export Citation Format

Share Document