Search Results - "Abrajevitch, Alexandra"

Diagenetic formation of bedded chert: Implications from a rock magnetic study of siliceous precursor sediments by Abrajevitch, Alexandra

“…•Rock magnetic study of alternating bands of clay-rich and Radiolarian-rich sediment.•Sediments are similar to chert but different from shales in magnetic…”
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Unexpected Magnetic Behavior of Natural Hematite‐Bearing Rocks at Low Temperatures by Alexandra Abrajevitch, Andrew P. Roberts, Brad J. Pillans, Rie S. Hori

“…Abstract Hematite is a commonly occurring magnetic mineral in nature that has numerous scientific and technological applications. A characteristic property of…”
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Hematite (α-Fe2O3) quantification in sedimentary magnetism: limitations of existing proxies and ways forward by Roberts, Andrew P., Zhao, Xiang, Heslop, David, Abrajevitch, Alexandra, Chen, Yen-Hua, Hu, Pengxiang, Jiang, Zhaoxia, Liu, Qingsong, Pillans, Brad J.

“…Determination of hematite contributions to sedimentary magnetizations is an important but difficult task in quantitative environmental studies. The poorly…”
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Haematite pigmentation events and palaeomagnetic recording: implications from the Pilbara Print Stone, Western Australia by Abrajevitch, Alexandra, Pillans, Brad J., Roberts, Andrew P.

“…Haematite pigment is a common constituent of sedimentary rocks, but its contribution to the natural remanent magnetization of rocks is poorly understood. Here,…”
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Palaeomagnetism of the West Sakhalin Basin: evidence for northward displacement during the Cretaceous by Abrajevitch, Alexandra, Zyabrev, Sergey, Didenko, Alexei N., Kodama, Kazuto

“…SUMMARY A significant margin‐parallel translation of terranes is postulated by all models for tectonic evolution of the East Asian continental margin, although…”
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Magnetic properties of iron minerals produced by natural iron- and manganese-reducing groundwater bacteria by Abrajevitch, Alexandra, Kondratyeva, Lubov M., Golubeva, Evgeniya M., Kodama, Kazuto, Hori, Rie S.

“…Understanding the contribution of biogenic magnetic particles into sedimentary assemblages is a current challenge in palaeomagnetism. It has been demonstrated…”
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Volcanic iron fertilization of primary productivity at Kerguelen Plateau, Southern Ocean, through the Middle Miocene Climate Transition by Abrajevitch, Alexandra, Roberts, Andrew P., Kodama, Kazuto

“…ODP Site 747, central Kerguelen Plateau, contains a nearly complete record of the Middle Miocene Climate Transition (MMCT). Its unusually well preserved and…”
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Variations in relative abundances of goethite and hematite in Bengal Fan sediments: Climatic vs. diagenetic signals by Abrajevitch, Alexandra, der Voo, Rob Van, Rea, David K.

“…Relative abundances of goethite and hematite in marine sediments have been increasingly used in reflectance spectrometry studies to infer the precipitation…”
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Magnetic Domain State and Anisotropy in Hematite (α‐Fe2O3) From First‐Order Reversal Curve Diagrams by Roberts, Andrew P., Zhao, Xiang, Hu, Pengxiang, Abrajevitch, Alexandra, Chen, Yen‐Hua, Harrison, Richard J., Heslop, David, Jiang, Zhaoxia, Li, Jinhua, Liu, Qingsong, Muxworthy, Adrian R., Oda, Hirokuni, O’Neill, Hugh St. C., Pillans, Brad J., Sato, Tetsuro

“…Hematite carries magnetic signals of interest in tectonic, paleoclimatic, paleomagnetic, and planetary studies. First‐order reversal curve (FORC) diagrams have…”
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Bainang Terrane, Yarlung-Tsangpo Suture, southern Tibet (Xizang, China); a record of intra-Neotethyan subduction-accretion processes preserved on the roof of the world by Ziabrev, Sergey V, Aitchison, Jonathan C, Abrajevitch, Alexandra V, Badengzhu, Badengzhu, Davis, Aileen M, Luo Hui, Luo Hui

“…The Bainang terrane, an intra-oceanic island arc subduction complex into which Tethyan oceanic rocks were accreted during the Cretaceous, is preserved within…”
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Precise radiolarian age constraints on the timing of ophiolite generation and sedimentation in the Dazhuqu Terrane, Yarlung-Tsangpo suture zone, Tibet by Ziabrev, Sergey V, Aitchison, Jonathan C, Abrajevitch, Alexandra V, Badengzhu, Badengzhu, Davis, Aileen M, Luo Hui, Luo Hui

“…Well-preserved, abundant radiolarians provide high-precision biostratigraphic age constraints on the timing of the eruption of ophiolitic basalts exposed along…”
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Discussion of the paper “Switch of NE Asia from extension to contraction at the mid-Cretaceous: A tale of the Okhotsk oceanic plateau from initiation by the Perm Anomaly to extrusion in the Mongol–Okhotsk ocean?” by Kai-Jun Zhang, Li-Long Yan, Chen Ji by Zyabrev, Sergey, Abrajevitch, Alexandra

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Incompatible Ediacaran paleomagnetic directions suggest an equatorial geomagnetic dipole hypothesis by Abrajevitch, Alexandra, Van der Voo, Rob

“…Paleomagnetic results obtained from rocks of Ediacaran age in several localities in Laurentia and Baltica persistently display co-existence of two…”
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Asteroid impact vs. Deccan eruptions: The origin of low magnetic susceptibility beds below the Cretaceous–Paleogene boundary revisited by Abrajevitch, Alexandra, Font, Eric, Florindo, Fabio, Roberts, Andrew P.

“…The respective roles of an asteroid impact and Deccan Traps eruptions in biotic changes at the Cretaceous–Paleogene (K–Pg) boundary are still debated. In many…”
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Biochemical vs. detrital mechanism of remanence acquisition in marine carbonates: A lesson from the K–T boundary interval by Abrajevitch, Alexandra, Kodama, Kazuto

“…An apparently complete carbonate-rich Cretaceous–Tertiary boundary interval in ODP section 119-738C-20R-5 from the southern Kerguelen Plateau provides a unique…”
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Tracing acidification induced by Deccan Phase 2 volcanism by Font, Eric, Ponte, Jorge, Adatte, Thierry, Fantasia, Alicia, Florindo, Fabio, Abrajevitch, Alexandra, Mirão, José

“…The Deccan Volcanic Province (DVP) was built up by three major phases of eruptions; the most voluminous of which, the Deccan Phase 2, encompassed the…”
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Unraveling the early–middle Paleozoic paleogeography of Kazakhstan on the basis of Ordovician and Devonian paleomagnetic results by Bazhenov, Mikhail L., Levashova, Natalia M., Degtyarev, Kirill E., Van der Voo, Rob, Abrajevitch, Alexandra V., McCausland, Phil J.A.

“…It is a common concept that different tectonic units in the western part of the Central Asian Orogenic Belt were united into the landmass of the Kazakhstania…”
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Magnetization carriers and remagnetization of bedded chert by Abrajevitch, Alexandra, Hori, Rie S., Kodama, Kazuto

“…Bedded chert is the only sediment type representative of the Paleozoic to early Mesozoic pelagic marine environment. Because of their association with…”
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Editorial: Magnetic Records of Extreme Geological Events by Font, Eric, Abrajevitch, Alexandra, Florindo, Fabio

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The role of the Kazakhstan orocline in the late Paleozoic amalgamation of Eurasia by Abrajevitch, Alexandra, Van der Voo, Rob, Bazhenov, Mikhail L., Levashova, Natalia M., McCausland, Phil J.A.

“…The Kazakhstan orocline, a horseshoe-shaped belt with volcanic arcs of Devonian (external) and late Paleozoic (internal) age, is thought to have formed as a…”
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