Project "RECONSTRUCTION OF THE GEOMAGNETIC FIELD EVOLUTION DURING THE HOLOCENE FOR FORECASTING OF GEODYNAMIC AND CLIMATIC CHANGES IN THE FUTURE"
Field trips: "Bukhara-2018"
Project objectives and research areas
Construction of a new research infrastructure and development of new methods in paleo/archeomagnetism
a) Construction of a new world-class archeomagnetic laboratory, with state-of-the-art experimentaltechniques.
b) Development or purchasing of new equipments for the acquisition of new reliable geomagnetic field directionand intensity data.
c) Development and test of new methods and procedures for data acquisition and analysis, including the use of thenew rehydroxylation dating method applicable to archeological baked clays.
Magnetic reversal frequency during the Precambrian and Early Paleozoic
a) Acquisition of new magnetostratigraphic data from Mesoproterozoic, Neoproterozoic and Cambrian keysedimentary sections.
b) Constraining the occurrence of superchrons during the Mesoproterozoic and the Neoproterozoic.
c) Deciphering the variations in magnetic reversal frequency during the late Precambrian, in particular the abruptchanges between periods characterized by frequent polarity reversals and long time intervals without anyreversal (superchrons).
d) Testing a possible evolution in geomagnetic field behavior between the Precambrian and the Phanerozoic thatmight be related with the late growth (<1 Gy) of the inner core.
e) Testing the occurrence of True Polar Wander events and/or of million-scale time intervals of “unstable” geomagnetic field during the Ediacaran and the Lower Cambrian periods.
Russian regional archeomagnetic variation curves, and their implication for the construction of new global geomagnetic field models over the past few millennia
a) Acquisition of new archeomagnetic data (direction and intensity) from the analysis of numerous well-datedarcheological artifacts from Central Russia, Tatarstan, Urals and Eastern Siberia.
b) Re-evaluation of old Russian archeomagnetic data using modern criteria.
c) Paleomagnetic studies of lake sediments in Urals and adjacent regions to constrain the geomagnetic secularvariations over the past few millennia.
d) Paleomagnetic study of Holocene volcanic series from Kamchatka.
e) Construction of regional and global millennial-scale secular variation (direction and intensity) curves using upto-date field modeling techniques.
Snapshots of geomagnetic field paleointensity
a) Investigations of thermochemical processes (oxidation) and their bearing on natural remanent magnetizationacquisition in volcanics.
b) Acquisition of new paleointensity data for the Paleoproterozoic, Devonian and Middle Jurassic.
c) Constraining a possible relationship between magnetic field reversal frequency and dipole field moment.
Snapshots of geomagnetic field secular variation during the Phanerozoic
a) Determination of directional and paleointensity geomagnetic field variations during the Late Cenozoic from Kamchatka volcanic series.
b) Determination of directional and paleointensity variations at the Paleozoic-Mesozoic boundary (~ 250 Ma) inthe Norilsk and Maymecha-Kotuy volcanic series from the Siberian traps.
c) Constraining the secular variation in other Phanerozoic magmatic series from different regions (Ordovician toPermian island-arc complexes in the Urals and Kazakhstan, Late Permian to Late Triassic-Early Jurassic lava sequences in Mongolia.
Neoproterozoic to Early Phanerozoic paleogeographic evolution of Northern Eurasia
a) Construction of the Neoproterozoic segment of the Siberian apparent polar wander path (APWP), and itsimplication for the paleogeographic evolution of Siberia.
b) Construction of the Ediacaran APWP of Baltica and kinematics of this craton around the Precambrian-Phanerozoic boundary.
c) Deciphering the Central Asiatic Orogenic System (CAOS) formation.
d) Acquisition of new paleomagnetic and geochronological data to constrain the formation of the Baikal-Patomfold belt.
Paleomagnetic cross-section of Eurasia along the Permo-Triassic paleomeridian
a) Acquisition of multiple reliable paleomagnetic data on Upper Permian to Lower Triassic rocks in Southern,Central and Eastern Europe, the Urals and the Siberian platform spreading along a paleomeridian, fromequatorial to polar paleolatitudes. Development and test of an inclination-shallowing correction method forsediment paleomagnetic data.
b) Testing the geocentric axial dipole (GAD) model for the geomagnetic field at the Paleozoic-Mesozoic boundary.
c) Constraining the geomagnetic field dipole/non-dipole ratios at different geological timeintervals d. Modeling of magnetization acquisition in red beds.