Magnetostratigraphic dating of loess deposits in china
In this paper, we present a detailed magnetostratigraphy of the Bastau Formation (Fm) as a fundamental basis for better understanding the Neogene climate dynamics in Central Asia.
The Bastau Fm, with its depositional variability and magneto-mineralogical alteration effects, is an example of a complex continental setting. doi: 10.1111/j.1365-246X.1984.tb01909.x Cross Ref Full Text | Google Scholar Tauxe, L., Kent, D.
The overlying Ili Fm roughly resembles the underlying Kokterek Fm but with more organic rich horizons (Bodina, 1961; Voigt et al., 2017). Late Cenozoic central Asian drying inferred from a palynological record from the northern Tian Shan.
Secondary magnetic overprints due to viscous remanences, new formation of magnetic minerals and magneto-mineralogical alteration associated with burial, diagenesis, exhumation and exposure may complicate the analysis of characteristic remanences. A semi-arid desert, steppe vegetation and the Ili River dominate the today's landscape. The basin is surrounded by the foothills of the Dzhungarian Alatau Mountains to the north and the foothills of the Tien Shan Mountains to the south. (A) Overview map of Central Asia and the Tibetan Plateau (red star marking the location of the studied Aktau Mountains), (B) topographic map of the Ili Basin and the Tien Shan belt with major fault zones after Jolivet et al. The Aktau Mountains provide an exceptionally well-exposed, long and continuous succession of Cenozoic sediments. The extent of the Paratethys, together with its advance and retreat largely influenced the atmospheric moisture supply in Central Asia (Fluteau et al., 1999; Bosboom et al., 2011). Mena (Geological Society, London, Special Publications), 23–53 Google Scholar Voigt, S., Weber, Y., Frisch, K., Bartenstein, A., Hellwig, A., Petschick, R., et al. Climatically forced moisture supply, sediment flux and pedogenesis in Miocene mudflat deposits of south-east Kazakhstan, Central Asia. To investigate these influencing factors, we study a well-exposed paleoclimatic archive, the Neogene sedimentary succession in the Aktau Mountains (SE Kazakhstan).