Magnetic anisotropy of limestones from Limhamn, Southern
The magnetic fabric of the Limhamn limestones is characterized by a low initial magnetic susceptibility Of 68 specimens with a positive susceptibility, 10 show a distinct anisotropy In nine of these, the axes of minimum susceptibility are practically normal to the magnetic foliation plane The observed anisotropy pattern has some resemblance to a magnetic fabric acquired by deposition adshelp[at]cfaharvardedu The ADS is operated by the Smithsonian Astrophysical Observatory under NASA Cooperative Agreement NNX16AC86AMagnetic anisotropy of limestones from Limhamn, Southern These magnetic minerals occur in different combinations in the marine limestones of central Europe and the Mediterranean realm Pyrite is common in certain limestones, where it can be the precursor of an unwelcome late goethite Pyrrhotite may be responsible for unstable magnetization in the Swiss Helvetic limestones but otherwise is rareMagnetic properties of marine limestones Lowrie 1982 Magnetic anisotropy of limestones from Limhamn, The magnetic fabric of the Limhamn limestones is characterized by a low initial magnetic susceptibility Of 68 specimens with a positive susceptibility, 10 show a distinct anisotropy In nine of these, the axes of minimum susceptibility are practically normal to the magnetic foliation planemagnetic anisotropy of limestones from limhamn southern The Maastrichtian and Danian limestone sequence known from Limhamn (southern Sweden) contains ferromagnetic minerals dispersed in a diamagnetic matrix The initial magnetic susceptibility measured does, on the whole, agree with the iron amounts registered by XrayInvestigation of magnetic and sedimentary fluctuations in
Investigation of rocks with low remanent magnetization
A 290 m sequence of Maastrichtian and Danian limestones from Limhamn, southern Sweden, has been investigated magnetically The observed mean natural rMagnetic hysteresis of limestones: facies control? NASA/ADS The hysteresis properties of 116 nonred, marine limestones from 92 localities indicate that remanence is carried by magnetite of pseudosingledomain (PSD) and small multidomain (MD) size Pelagic limestones have paramagnetic matrices and hysteresis properties compatible with larger PSD or MD grain sizes of magnetite, probably magnetic properties of marine limestonesThe magnetic fabric of a collection of Trenton Limestone specimens has been determined using this method, as well as by conventional anisotropy of magnetic susceptibility The results demonstrate the usefulness of the new method for finding the magnetic fabric of rock units such as the Trenton in which the bulk magnetic susceptibilities are lowMagnetic anisotropy in the Trenton Limestone: Results of a The anisotropy is probably responsible for the anomalous NRM directions of these limestones The stable component of the natural remanent magnetization (NRM) of the Upper Triassic “Calcari con Selce” limestone formation at Marsico Nuovo (Lagonegro Basin, Southern Italy) has an inclination which is about 45° too steep for the expected paleogeographic positionRock magnetism of deformed Upper Triassic limestones from Sjôberg, B, Magnetic anisotropy of limestones from Limhamn, southem SwedenMagnetic fabric of the granitegneiss complex of Askersund
Rock magnetism of deformed Upper Triassic limestones from
The stable component of the natural remanent magnetization (NRM) of the Upper Triassic “Calcari con Selce” limestone formation at Marsico Nuovo (Lagonegro Basin, Southern Italy) has an inclination which is about 45° too steep for the expected paleogeographic position In order to explain this abnormal magnetization direction, several rock magnetic properties such as the dependence of The anisotropy is probably responsible for the anomalous NRM directions of these limestones The stable component of the natural remanent magnetization (NRM) of the Upper Triassic “Calcari con Selce” limestone formation at Marsico Nuovo (Lagonegro Basin, Southern Italy) has an inclination which is about 45° too steep for the expected paleogeographic positionRock magnetism of deformed Upper Triassic limestones from Upper Triassic cherty limestones which are part of the lower imbricate exhibit a variable anisotropy of low field magnetic susceptibility (AMS) from 5% to 40% The AMS ellipsoids show a lack of (PDF) Rock magnetism of deformed Upper Triassic limestones The rock magnetic study showed that the main minerals responsible for the magnetic properties of the greywackes and mudstones are pyrrhotite and magnetite In limestones pyrrhotite is the only magnetic carrier Our palaeomagnetic study revealed four components of NRM (D, C, P and R) carried by pyrrhotite or sometimes by magnetite The positive Palaeomagnetic and rock magnetic study of Devonian Rockmagnetic studies of Upper Jurassic limestones from southern Germany, The measurement of the anisotropy of magnetic susceptibility of rocks by the torque method, (1962) The Onondaga limestone and the Schoharie formation in southeastern New York, in Guide Book to Field Trips' (1970) The use of magnetic fabric in paleocurrent estimation, To submit an update or takedown request for Paleomagnetism of the Devonian Onondaga Limestone
POST‐DEPOSITIONAL DETRITAL REMANENT MAGNETIZATION IN
W Lowrie and AM Hirt, Anisotropy of magnetic susceptibility in the Scaglia Rossa pelagic limestone, Earth and Planetary Science Letters, 82, 34, (349), (1987) CrossrefHigher magnetic susceptibility values (025 to 56 x 103) were measured on sandstone on outcrops of the Beaver Mines Formation (middle Blairmore Group) In the Limestone and Marble mountains areas, the magnetic susceptibility of the diamagnetic carbonaceous rocks ranges from – 012 to – 015 x 10 –4 Figure 3 Radially averaged energy Aeromagnetic Anomalies from the SouthCentral Alberta is found in Mesozoic limestones and Paleocene‐Eocene red beds Magnitude of rotation decreasestowardtheeastfrom(R=−356°±128°)inthecentralblockto(R=−45°±84°) south of the town of Cuzco The anisotropy of magnetic susceptibility (AMS) recorded by the red beds sediments is the consequence of compaction and tectonic strain during the early stages of deformation We show that Tectonic rotations and transcurrent deformation south of In the westernmost block, a large counterclockwise rotation (R = 650° ± 111°) is found in Mesozoic limestones and PaleoceneEocene red beds Magnitude of rotation decreases toward the east from (R = 356° ± 128°) in the central block to (R = 45° ± 84°) south of the town of Cuzco The anisotropy of magnetic susceptibility (AMS) recorded by the red beds sediments is the Repositorio Institucional INGEMMET: Tectonic rotations and the atomic magnetic moments and their interaction in the crystals, and thus completely independent from the regional magnetic fabric The degree of anisotropy in lava flows is mostly low, the magnetic fabric is mostly planar, and the magnetic foliation is parallel to the flow base (HerreroBervera et al, 2002) It is an expected model in lavas Paleocurrent direction measurements in a volcanic setting
Palaeomagnetic and rock magnetic study of Devonian
The rock magnetic study showed that the main minerals responsible for the magnetic properties of the greywackes and mudstones are pyrrhotite and magnetite In limestones pyrrhotite is the only magnetic carrier Our palaeomagnetic study revealed four components of NRM (D, C, P and R) carried by pyrrhotite or sometimes by magnetite The positive is found in Mesozoic limestones and Paleocene‐Eocene red beds Magnitude of rotation decreasestowardtheeastfrom(R=−356°±128°)inthecentralblockto(R=−45°±84°) south of the town of Cuzco The anisotropy of magnetic susceptibility (AMS) recorded by the red beds sediments is the consequence of compaction and tectonic strain during the early stages of deformation We show that Tectonic rotations and transcurrent deformation south of Magnetic susceptibility (MS), its frequencydependence and anisotropy of the Middle Ordovician Dapingian and Darriwilian sedimentary sequence from three sites (Uuga, Testepere and Leetse) in the Pakri Peninsula, NW Estonia are analysed in combination with the mineralogical composition The study is based on 463 cores drilled at intervals of a few centimetres to a maximum of about 1 m All the Magnetic susceptibility of Middle Ordovician sedimentary W Lowrie and AM Hirt, Anisotropy of magnetic susceptibility in the Scaglia Rossa pelagic limestone, Earth and Planetary Science Letters, 82, 34, (349), (1987) CrossrefPOST‐DEPOSITIONAL DETRITAL REMANENT MAGNETIZATION IN mineral generally found in marine limestone, is probably biogenic1 Under certain physical and chemical conditions, pyrite will transform to ferro magnetic minerals, ie, pyrrhotite (FeS 1+X), magnetite and haematite 2, 3, 4 Therefore magnetic characteristics of rocks can be related to the palaeoenvironment during the long history of rocks Magnetic properties measured in rock include an Magnetic Characterization of the ThungYai Redbed of
Magnetic susceptibility, its anisotropy, and magnetic
measurements of anisotropy of magnetic susceptibility (AMS) were carried out From the AMS data it is also possible to determine the direction of paleoflow directions which could better describe the sedimentary environment To determine the magnetic remanence carriers, or more importantly the presence of primary magnetite that is suitable for palaeomagnetical studies, thermal demagnetization Higher magnetic susceptibility values (025 to 56 x 103) were measured on sandstone on outcrops of the Beaver Mines Formation (middle Blairmore Group) In the Limestone and Marble mountains areas, the magnetic susceptibility of the diamagnetic carbonaceous rocks ranges from – 012 to – 015 x 10 –4 Figure 3 Radially averaged energy Aeromagnetic Anomalies from the SouthCentral Alberta In the westernmost block, a large counterclockwise rotation (R = 650° ± 111°) is found in Mesozoic limestones and PaleoceneEocene red beds Magnitude of rotation decreases toward the east from (R = 356° ± 128°) in the central block to (R = 45° ± 84°) south of the town of Cuzco The anisotropy of magnetic susceptibility (AMS) recorded by the red beds sediments is the Repositorio Institucional INGEMMET: Tectonic rotations and Fleming, T H, Grunow, A M, Priest*, J, Calhoun*, A, Marshak, S, and Whittington, A (2006) Magnetic Anisotropy in Ferrar Sills from the Upper Taylor Glacier Region, Southern Victoria Land, Antarctica 10th annual Connecticut State University Faculty Research Conference Abstract Volume, October 14, 2006, Western Connecticut State University p 26Earth Science Student Research Southern Connecticut
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