Anomalous geomagnetic field behavior recorded by glacial sediments from northwestern Patagonia, Argentina.

Kodama, Kenneth P.; Evenson, Edward B.; Clinch, J.M.; Rabassa, Jorge

doi:10.5636/jgg.37.1035

Cited by 13 publications

(2 citation statements)

References 24 publications

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“…In addition, we also present anisotropy of magnetic susceptibility (AMS) data from this sedimentary sequence to help in understanding the changes in paleocurrent directions in Kashmir valley that occurred during the Pliocene‐Pleistocene time. AMS studies have been published for fluvial sediments [ Ellwood , personal communication, in Tarling and Hrouda , 1993; Gautam and Rösler , 1999; Gautam et al , 2000; Sangode et al , 2001; Hrouda , 2007] and glaciolacustrine sediments [ Kodama et al , 1985; Rosenbaum et al , 2000; Soto et al , 2009]. However, examples of fluviolacustrine sequences are rare in the literature [ Garćes et al , 1997].…”

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confidence: 99%

Revised magnetostratigraphy and characteristics of the fluviolacustrine sedimentation of the Kashmir basin, India, during Pliocene‐Pleistocene

Basavaiah¹,

Appel²,

Lakshmi³

et al. 2010

J. Geophys. Res.

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[1] The Pliocene-Pleistocene Karewa Group sediments of the Kashmir basin, India, provide an important continental archive for past climatic reconstruction. The present study reevaluates the magnetic polarity stratigraphy and the nature of the depositional environment at a 440-m-thick section along Romushi river near Pakharpur (33°48′50″N, 74°45′54″E). Magnetic remanences are predominantly carried by Ti-rich titanomagnetite and magnetite. We identified eight normal and eight reversed-polarity magnetozones in this succession, ranging between 4.40 and 0.77 Ma. The polarity sequence includes the new identification of the Cochiti and the Mammoth and their preceding and succeeding reversed/normal as well as the Jaramillo subchrons. Anisotropy of magnetic susceptibility data suggest the existence of northeast-and northwest-flowing fluvial system before 4.18 Ma, indicating the Pir Panjal range at the southwest as the sediment source area. Following this, the valley was under the influence of fluviolacustrine environment between 4.18 and 0.77 Ma. Our results suggest relatively strong flow velocity toward the northeast during the upper Gilbert, Gauss, and lower and middle Matuyama chrons (4.18-1.07 Ma). In the upper Matuyama chron (<1.07 Ma), the prevailing paleocurrent direction in the basin changed toward the northwest with a reduced flow velocity, indicating the emergence of the ancestral Jhelum river. On the basis of the magnetic polarity chronology, the sediment accumulation rate indicates a very low value of ∼4.6 cm kyr −1 before 1.95 Ma to ∼33 cm kyr −1 between 1.95 and 1.77 Ma and 23 cm kyr −1 after 1.77 Ma. We attribute temporal changes in sedimentation rate to the interplay between climate (predominantly westerlies) and tectonics (pulsating Pir Panjal uplift).

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Section: Introductionmentioning

confidence: 99%

Revised magnetostratigraphy and characteristics of the fluviolacustrine sedimentation of the Kashmir basin, India, during Pliocene‐Pleistocene

Basavaiah¹,

Appel²,

Lakshmi³

et al. 2010

J. Geophys. Res.

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“…A. 1981;GRANAR, L. 1958;KODAMA, K. P. et al 1985;LIU, X. et al 1988;LIU, B. et al 2005;REES, A. I. 1966REES, A. I. , 1968; REES, A. I.-WOODALL, W. A.…”

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Magyarországi lösztípusok mágneses szövetének összehasonlító elemzése és szerepük a pleisztocén kori környezetrekonstrukcióban

Bradák¹

2014

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Témavezet : Dr. Horváth Erzsébet habilitált egyetemi docens "Bármit csinálunk is, anyagból csináljuk -elmélkedett tovább Mikromill -, tehát az anyagban rejlik minden lehet ség. Ha házat gondolunk ki, házat építünk; ha palotát, akkor palotát; ha gondolkodó csillagot képzelünk el, azt is meg tudjuk csinálni. De az anyagban több lehet ség van, mint a mi fejünkben; tehát szájat kellene adni az anyagnak, hogy maga mondja meg, mit lehet még csinálni bel le!" STANISŁAWLEM(1987)

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Paleomagnetism of glacial varves from the last glaciation maximum in Patagonia at Lago Blanco

Sylwan

1990

Physics of the Earth and Planetary Interiors

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Anomalous geomagnetic field behavior recorded by glacial sediments from northwestern Patagonia, Argentina.

Cited by 13 publications

References 24 publications

Revised magnetostratigraphy and characteristics of the fluviolacustrine sedimentation of the Kashmir basin, India, during Pliocene‐Pleistocene

Revised magnetostratigraphy and characteristics of the fluviolacustrine sedimentation of the Kashmir basin, India, during Pliocene‐Pleistocene

Magyarországi lösztípusok mágneses szövetének összehasonlító elemzése és szerepük a pleisztocén kori környezetrekonstrukcióban

Paleomagnetism of glacial varves from the last glaciation maximum in Patagonia at Lago Blanco

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