Active faulting, mountain growth, and erosion at the margins of the Tibetan Plateau constrained by in situ-produced cosmogenic nuclides

Abstract HKT-ISTP 2013 A

Phases of Enhanced Exhumation During the Cretaceous and Cenozoic Orogenies in the Eastern European Alps: New Insights From Thermochronological Data and Thermokinematic Modeling

Austroalpine nappes in the Eastern European Alps have preserved the record of orogenies in the Cretaceous and Cenozoic but their cooling and exhumation history remains poorly constrained. Here we use low-temperature thermochronology and thermokinematic modeling to unravel the exhumation history of the Austroalpine nappes in the Gurktal Alps. Our data reveal marked differences between the exhumation of units located at different positions within the nappe stack and relative to the Adriatic indenter. Units located at a high structural level and farther away from the indenter cooled through the zircon fission track closure temperature in the Late Cretaceous and have resided at depths of ≤5–6 km since the Oligocene, as indicated by apatite fission track ages of 35–30 Ma. Thermokinematic modeling constrained that these units experienced enhanced exhumation (∼0.60 km/Ma) between ∼99 and ∼83 Ma due to syn- to late-orogenic Late Cretaceous extension. After a phase of slow exhumation (∼0.02 km/Ma), the exhumation rate increased to ∼0.16 km/Ma at ∼34 Ma due to the onset of the Europe-Adria collision. In contrast, zircon fission track ages from units at a lower structural level and near the indenter indicate cooling during the Eocene; apatite fission track ages cluster at ∼15 Ma. These units were rapidly exhumed (∼0.76 km/Ma) from ∼44 to ∼39 Ma during an Eocene phase of shortening prior to the Europe-Adria collision. After slow exhumation (∼0.13 km/Ma) between ∼39 and ∼18 Ma, the exhumation rate increased to ∼0.27 km/Ma in the wake of Miocene escape tectonics in the Eastern Alps

LGM ice extent and deglaciation history in the Gurktal and Lavantal Alps (eastern European Alps): first constraints from 10Be surface exposure dating of glacially polished quartz veins

Compared with the western European Alps, the ice extent during the Last Glacial Maximum (LGM) and the subsequent deglaciation history of the eastern Alps east of the Tauern Window remain less well constrained. Also, considerable discrepancies exist between the mapped LGM ice margin and the ice extent predicted by ice-sheet models. Here we present the first 10Be surface exposures ages from two regions east of the Tauern Window (the Gurktal and Lavantal Alps), which provide constraints on the LGM ice extent and the deglaciation history. Our results show that the deglaciation of the Gurktal Alps occurred between 16 and 14 ka, which agrees with the predictions from ice-sheet models. In contrast, the 10Be ages from the Lavantal Alps located farther east are either LGM in age or predate the LGM, indicating that these regions were ice free or only partially covered by LGM ice. This finding suggests that ice-sheet models may have overestimated the LGM ice extent in the easternmost Alps. In conclusion, our study highlights the need for more age data from the eastern Alps to refine the location of the LGM ice margin and the deglaciation history, which is also crucial for climate-evolution and postglacial-rebound models

The tax burden in Russia

Main directions of fiscal policy allow economic agents to identify their business objectives, given the proposed changes in the tax area. This increases the certainty of the terms of reference of the economic activities on the territory of the Russian Federation

Spatial patterns of erosion and landscape evolution in a bivergent metamorphic core complex revealed by cosmogenic 10Be: The central Menderes Massif (western Turkey)

In extensional provinces with low-angle normal faulting (such as the Aegean region), both tectonic processes and erosion induce landscape change, but their interaction during the evolution of topography and relief accompanying continental extension has rarely been addressed. Here we present local and catchment-wide 10Be erosion rates that document the spatial pattern of erosion in the central Menderes Massif, a metamorphic core complex consisting of two asymmetric mountain ranges (Bozdağ and Aydın) bound by detachment faults and active grabens. Catchment-wide erosion rates on the northern flank of the Bozdağ Range are rather low (40–110 mm/k.y.) but reach values of >300 mm/k.y. on the steep southern escarpment—a pattern that reflects both topography and bedrock lithology. In the Aydın Range, erosion rates are generally higher, with mean erosion rates of ∼190 and ∼260 mm/k.y. on the northern and southern flank, respectively, and more variable along strike. In both ranges, erosion rates of ridge crests derived from amalgamated clasts are 30–90 mm/k.y. The difference between local and catchment-wide erosion rates indicates that topographic relief increases in most parts of the massif in response to ongoing fault-related uplift and concomitant river incision. Our findings document that tectonic processes exert a significant control on landscape evolution during active continental extension and are reflected in both the topographic signature and the spatial pattern of erosion. In the Menderes Massif, rock susceptibility to weathering and erosion is a dominant factor that controls the erosional contribution to rock exhumation, which varies spatially between ∼10% and ∼50%

TESIN Schlussbericht

Der vorliegende Schlussbericht dokumentiert die Weiterentwicklung von Hochtemperaturwärmespeichern für Industrieprozesse. Das Projekt umfasste die Systemanalyse von Elektrostahlwerken und Heiz(kraft)werken und die Auslegung von Wärmespeichern hierfür, sowie die Entwicklung, Auslegung, Bau, Integration und Inbetriebnahme eines Hochtemperatur-Latentwärmespeichers für ein laufendes Heizkraftwerk. Hierbei wurden Erkenntnisse und Bauweisen aus vorhergehenden Projekten wie dem ITES Projekts (FKZ 16UM0064), und dem zeitweise parallel laufenden DSGSTORE Projekt (FKZ 0325333) angewendet und weiter entwickelt. Die Ergebnisse zeigen, dass durch die Weiterentwicklung die Produktion von überhitztem Dampf bei hohen Temperaturen durch Latentwärmespeicher sowie die Integration und Aufbau nach aktuellen Richtlinien möglich ist. Zudem wurde gezeigt, dass eine Integration in verschiedene Prozesse eine Energieeinsparung ermöglichen würde, die aber bei einer nachträglichen Integration deutlich geringer ausfällt als bei einer Integration während der Prozessentwicklung. Die beim Bau des Speichers gewonnenen Daten und Erkenntnisse sollen zukünftig die Integration von thermischen Energiespeichern in Industrieprozesse erleichtern

Технология сборки и сварки стропильной фермы

Цель работы заключается в разработке технологии сборки и сварки полигональных стропильных ферм и выполнении плана расстановки оборудования в производственном цеху. В результате выполнения выпускной квалификационной работы был определен перечень необходимых операций для производственного цикла, выбран способ сварки, а так же сварочное оборудование, материалы и приспособления, облегчающие сборку. Предложен план расстановки оборудования в производственном цеху. Проведен анализ конкурентоспособности, ресурсоэффективности предлагаемой технологии и анализ вредных и опасных факторов на производстве.The aim of the work is to develop a technology for assembling and welding polygonal rafters and implementing a plan for arranging equipment in the production hall. As a result of the final qualification work, a list of necessary operations for the production cycle was determined, a welding method, as well as welding equipment, materials and devices facilitating assembly was selected. A plan is proposed for arranging equipment in the production shop. The analysis of competitiveness, resource efficiency of the proposed technology and the analysis of harmful and dangerous factors in production are carried out

First Search for Axion-Like Particles in a Storage Ring Using a Polarized Deuteron Beam

Based on the notion that the local dark-matter field of axions or axion-like particles (ALPs) in our Galaxy induces oscillating couplings to the spins of nucleons and nuclei (via the electric dipole moment of the latter and/or the paramagnetic axion-wind effect), we performed the first experiment to search for ALPs using a storage ring. For that purpose, we used an in-plane polarized deuteron beam stored at the Cooler Synchrotron COSY, scanning momenta near 970 MeV/c. This entailed a scan of the spin precession frequency. At resonance between the spin precession frequency of deuterons and the ALP-induced EDM oscillation frequency there will be an accumulation of the polarization component out of the ring plane. Since the axion frequency is unknown, the momentum of the beam and consequently the spin precession frequency were ramped to search for a vertical polarization change that would occur when the resonance is crossed. At COSY, four beam bunches with different polarization directions were used to make sure that no resonance was missed because of the unknown relative phase between the polarization precession and the axion/ALP field. A frequency window of 1.5-kHz width around the spin precession frequency of 121 kHz was scanned. We describe the experimental procedure and a test of the methodology with the help of a radiofrequency Wien filter located on the COSY ring. No ALP resonance was observed. As a consequence an upper limit of the oscillating EDM component of the deuteron as well as its axion coupling constants are provided.Comment: 25 pages, 24 figures, 7 tables, 67 reference