SUMMARY The time-averaged geomagnetic field is generally purported to be uniformitarian across Earth history—close a geocentric axial dipole, with average strength within one order of magnitude that at present. Nevertheless, recent studies have reported the was approximately ten times weaker than present in mid-Palaeozoic (∼410–360 Ma) and late Ediacaran (∼565 Ma). Here we first whole-rock palaeointensity determinations age outside Laurentia. These were obtained by Thellier-Coe, Wilson...

SUMMARY Changes in the geomagnetic field over geologic timescales can be used to study evolution and processes of its sources Earth's deep interior. As a stark contrast behaviour recent past, late Neoproterozoic is defined by ambiguous polar wander paths, ultralow strengths period extreme reversal hyperactivity. Palaeointensity data from this time are still scarce conclusions made these suffer large uncertainties brought low sampling density. In study, we present new palaeomagnetic...

The Antarctic Peninsula (AP) is a composite magmatic arc terrane formed at the Pacific margin of Gondwana. Through late Mesozoic and Cenozoic subduction has stopped progressively from southwest to northeast as result series ridge trench collisions. Subduction may be active today in northern part AP adjacent South Shetland Islands. system confined by Shackleton Hero fracture zones. continental marked high-amplitude gravity magnetic anomaly belts reaching highest amplitudes region Islands...

Summary The soil magnetism is the indicator of physical and chemical processes occurring in pedosphere. current war Ukraine arise new challenge related to studying magnetic properties at areas military activities, different drones missiles attacks, unexploded ordnance (UXO), other weapon pieces particulate matter which are constant sources organic inorganic pollution. study area Ozera-15 located Forest zone Ukraine. predominant Umbric Albeluvisols Abruptic according WRB-FAO. measurements...

A collection of 306 oriented samples from 43 Permian and Triassic intrusions the Ukrainian Shield, southwest portion East European Craton, has yielded valuable palaeomagnetic directions with new ages obtained using 40Ar/39Ar method. Andesitic have Late (six dating samples) 204.2 ± 1.6 Ma to 215.7 2.0 dual-polarity Dec/Inc = 60.1°/+64.4°, k 96, α95= 4.5°, derived N 12 sites. Trachyte dykes an early Artinskian (mid-Early Permian) age (one sample) 282.6 2.6 Ma, 204.3°/−23.8°, 27.7, 6.5°, 19 The...

A combined palaeodirectional and palaeointensity study of a representative collection plutonic rocks from the Antarctic Peninsula batholith western part Peninsula, near Ukrainian base 'Academik Vernadsky' were carried out. Petrographically, includes gabbros, diorites quartz diorites, tonalities, granodiorites granites. The ages igneous complex emplacement vary 50 to 117 Ma with most belonging Cretaceous Normal Superchron. characteristic remanent magnetizations isolated by stepwise thermal...

We provide a revised magnetostratigraphy and magnetic susceptibility stratigraphy of the most complete thickest (to nearly 60 m) loess-palaeosol sequences in Ukraine spanning past 1 My: Roksolany (Black Sea Lowland) Vyazivok (Dnieper sections. The Matuyama–Brunhes boundary has been detected both stratigraphically different palaeosol units according to current regional chronostratigraphic schemes. Hypotheses large lock-in depth at lithostratigraphic incompleteness do not resolve this...

New paleomagnetic and geochronological results on late Cretaceous-Paleogene intrusive effusive complexes of the western part Antarctic Peninsula have been obtained. isotopic dating "fills" regularly temporal gap from 96 to 61 Ma demonstrating uninterrupted character development considered active margin phase its origination collapse. For most analyzed rocks early associations Andian complex (96- 88 Ma) subductively-enriched lithospheric source can be definitely detected. younger Cenozoic...

We present evidence for the uppermost Jurassic–lowest Cretaceous interval in Crimea, coastal southern Ukraine. Three facies zones are distinguished upper Dvuyakornaya and Mayak formations of eastern Crimean Peninsula: basinal, slope toe-of-slope zones. In this we identify lowest Berriasian Jacobi Grandis subzones authors, expanded form, exceeding 160 metres thickness. new magnetostratigraphic interpretations, two normal reversed polarity intervals, assigned to M19n, M18r, M18n M17r, with...

The results of investigations in 2006–2010 for hydrocarbon and gas hydrates on the Antarctic Peninsula continental margin are given. In 2004 2006, marine geoelectric researches by methods forming a short-pulsed electromagnetic field (FSPEF) vertical electric-resonance sounding (VERS) had been conducted this region. “deposit” type anomaly was mapped FSPEF survey, anomalous polarized layers “hydrocarbon deposit” were chosen VERS within region UAS “Academician Vernadsky.” Anomalous zones “gas...

Over the past decade, development of unmanned aerial technologies has allowed them to be considered a tool for conducting remote Earth sensing research. The use such systems is primarily associated with solving geological and archaeological tasks. However, armed aggression by Russian Federation contaminated Ukrainian territory at an unprecedented scale, including unexploded ordnance (UXO). It necessary check vehicles (UAVs) can used address this issue. An efficient solution significantly...

Variations of rock magnetic parameters in loess-palaeosol sequences, related to climatic and environmental conditions during their formation, are a powerful tool for palaeoclimate reconstruction. Combined enviromagnetic study loess deposits Ukraine its assessment the palaeoreconstruction purposes carried out framework National Research Foundation project 2020.02/0406 ‘Magnetic proxies palaeoclimatic changes sequences Ukraine’. Environmental/climatic reconstructions past fulfilled using...

Background. One of the dangerous effects on environment caused by military actions in Ukraine is destruction soil. This includes its pollution, redistribution genetic horizons, compaction, change physical and chemical agronomic indicators, etc. Accumulated experience shows that most these processes are reflected magnetic properties soils. Methods. The applied method a full range field laboratory studies. More detailed mineralogical methods measurements described in. Results. On basis diagram...

Combined rock magnetic and palaeomagnetic studies of loess-soil sections — Lower Paleolithic sites in the valley Southern Bug (Medzhybizh, Holovchintsi) have been performed for first time order to determine suitability these objects study establishment magnetostratigraphic markers. Investigated by characteristics are closest Volynian Upland, refer intermediate «Chinese» type formation properties, with an admixture «Alaskan» mechanism. These characterized a low concentration ferrimagnetic...

Main principles of magnetostratigraphy, paleomagnetic method measurement and its applying in Quaternary stratigraphy have been set forth. Results Matuyama-Brunhes (M/B) boundary detection loess-soil sediments Ukraine other territories given the previous studies are presented. Attention has paid to contradictions determination M/B position episodes inverse polarity within Brunhes chron according data different authors. The situation is notably shown on Roxolany section West Black Sea region...