Anisotropy of Magnetic Susceptibility (AMS) Characteristics of Tide-Influenced Sediments in the Late Pleistocene-Holocene Changjiang Incised-Valley Fill, China

2005 ◽  
Vol 215 ◽  
pp. 1031-1041 ◽  
Author(s):  
Baozhu Liu ◽  
Yoshiki Saito ◽  
Toshitsugu Yamazaki ◽  
Abdelaziz Abdeldayem ◽  
Hirokuni Oda ◽  
...  
Keyword(s):  
Magnetic Susceptibility ◽  
Late Pleistocene ◽  
Anisotropy Of Magnetic Susceptibility ◽  
Incised Valley ◽  
Valley Fill

scholarly journals Stratigraphy and sedimentology of a late Pleistocene incised valley fill: a depositional and paleogeographic model for “Cancagua” deposits in north-western Patagonia, Chile

2018 ◽  
Vol 45 (2) ◽  
pp. 161
Author(s):  
Rodrigo M. Vega ◽  
Mauricio Mella ◽  
Sven N. Nielsen ◽  
Mario Pino
Keyword(s):  
Late Pleistocene ◽  
Substantial Part ◽  
Glacial Cycle ◽  
Incised Valley ◽  
Last Glacial ◽  
Valley Fill ◽  
Sedimentary Deposits ◽  
Facies Associations ◽  
North Western ◽  
The Last Glacial

Late Pleistocene sedimentary deposits outcropping around Valdivia city, locally known as Cancagua, have been subject of contrasting interpretations, from glacial to interglacial sediments. Opposing views emerge from focusing on upstream or coastal sedimentary controls, within a zone were these potentially overlap through a full glacial cycle. Here we present the first detailed facies analysis and a broad chronological framework, reconciling previous interpretations in a single paleogeographic model that encompasses the last glacial cycle. Seven facies associations are described, interpreted as an estuarine complex developed primarily during the last glacial cycle’s highstand, yet accumulating sediments during a substantial part of the falling stage. These results offer the opportunity to extend paleoenvironmental records through a full glacial cycle in northern Patagonia.

scholarly journals Nature, origin and evolution of a Late Pleistocene incised valley‐fill, Sunda Shelf, Southeast Asia

Sedimentology ◽  
2015 ◽  
Vol 62 (4) ◽  
pp. 1198-1232 ◽  
Author(s):  
Faisal A. Alqahtani ◽  
Howard D. Johnson ◽  
Christopher A.‐L. Jackson ◽  
Mohd Rapi B. Som
Keyword(s):  
Southeast Asia ◽  
Late Pleistocene ◽  
Sunda Shelf ◽  
Incised Valley ◽  
Origin And Evolution ◽  
Valley Fill

scholarly journals Nature, origin and evolution of a Late Pleistocene incised valley-fill, Sunda Shelf, Southeast Asia

2017 ◽  
Author(s):  
Faisal Alqahtani ◽  
Howard Johnson ◽  
Christopher Jackson ◽  
Rapi Som
Keyword(s):  
Southeast Asia ◽  
Late Pleistocene ◽  
Sunda Shelf ◽  
Incised Valley ◽  
Origin And Evolution ◽  
Valley Fill

Variations in magnetic properties of Mexican serpentinites and related micro-textures 

2021 ◽  
Author(s):  
Sandra B. Ramírez-García ◽  
Luis M. Alva-Valdivia
Keyword(s):  
Grain Size ◽  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
Anisotropy Of Magnetic Susceptibility ◽  
Ultramafic Rocks ◽  
Magnetic Carrier ◽  
Temperature Dependent ◽  
Geochemical Studies ◽  
The Relationship ◽  
Magnetite Formation

<p>Magnetite formation of serpentinized ultramafic rocks leads to variations in the magnetic properties of serpentinites; however, magnetite precipitation is still on debate.</p><p>In this work, we analyzed 60 cores of ultramafic rocks with a variety of serpentinization degrees. These rocks belong to the ultramafic-mafic San Juan de Otates complex in Guanajuato, Mexico. Geochemical studies have been previously conducted, enabling us to compare changes in the magnetic properties against the chemical variations generated by the serpentinization process. By studying the density and magnetic properties such as anisotropy of magnetic susceptibility, hysteresis curves as well as magnetic and temperature-dependent susceptibility and, we were able to identify the relationship between magnetic content and serpentinization degree, the predominant magnetic carrier, and to what extent the magnetite grain size depends on the serpentinization.  Variations in these parameters allowed us to better constrain the temperature at which serpentinization occurred, the generation of other Fe-rich phases such as Fe-brucite and/or Fe-rich serpentine as well as distinctive rock textures formed at different serpentinization degrees.</p>

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