227 documents found in 185ms
# 1
Balling, Niels • Tilmann, Frederik • Kind, Rainer
Abstract: This project investigates the crust and upper mantle along a north-south oriented, about 350 km long profile from around the town of Ringkøbing in western Jutland to south of Hamburg in northwestern Germany, with a focus on teleseismic receiver functions and seismic tomography. A number of tectonic processes have affected the crust and uppermost mantle beneath southern Scandinavia and northern Germany: Precambrian crustal accretion in southern Baltica, Caledonian collision between Baltica and Avalonia along the Tornquist Suture Zone (TSZ), followed by Variscan collision and formation of the North German and the Norwegian-Danish basins, and more recent magmatic activity to the south. This study is particularly focused on the closure of the Tornquist Sea and the Caledonian collision between Baltica and Avalonia. A total of 29 stations, provided by GFZ and the University of Aarhus, were deployed between autumn 2010 and summer 2012, of which 25 form the main profile, and 4 are positioned in an off-line location. Waveform data are available from the GEOFON data centre, under network code ZW, and are available under CC-BY 4.0 license according to GIPP-rules.
# 2
Dias, N.A. • Silveira, G. • Haberland, C.
Abstract: The lithosphere of Iberia has been formed through a number of processes of continental collision and extension. In Lower Paleozoic, the collision of three tectonics blocks produced the Variscan Orogeny, the main event of formation of the Iberian lithosphere. The subsequent Mesozoic rifting and breakup of the Pangea had a profound effect on the continental crust of the western border of Iberia. Since the Miocene, the southern interaction between Africa and Iberia is characterized by a diffuse convergent margin that originates a vast area of deformation. The impact of this complex tectonic in the structure of the Iberian Lithosphere remains an incognito, especially in its western part beneath Portugal. While the surface geology is considerably studied and documented, the crustal and lithospheric structures are not well constrained. The existing knowledge relating the observed surface geology and Lithospheric deep structures is sparse and sometimes incoherent. The seismic activity observed along West Iberia is intensely clustered on few areas, namely on north Alentejo, Estremadura and Regua-Verin fault systems. Some of the problems to address are: What is the relation between surface topography and the deep crustal/lithospheric structure? How was it influenced by the past tectonic events? Which was the deep driving factor behind the tectonic units observed at surface: Lithosphere-Astenosphere boundary structure or deeper mantle structure? How the upper mantle and the Lithosphere-Astenosphere transition zone accommodated the past subduction? Which is its role and influence of the several tectonic units, and their contacts, in the present tectonic regime and in the stress field observed today? Is the anomalous seismicity and associated crustal deformation rates, due to an inherited structure from past orogenies? The main goal of this work is a 3D detailed image of the “slice” of the Earth beneath Western Iberia, by complementing the permanent seismic networks operating in Portugal and Spain. The different scales involved require the usage of several passive seismological methods: Local-Earthquake Tomography for fine structure of seismogenic areas, ambient noise tomography for regional crustal structure, Receiver Functions for Lithospheric structure and Surface-wave tomography for large scale Listosphere-Astenosphere structure. Crustal and Mantle seismic anisotropy analysis, coupled with source analysis and correlation with current geodetic measurements will allow establishing a reference 3D anisotropy model of present and past processes.
# 3
Waldhoff, Guido
Abstract: This data set contains the land use classification of 2009 for the study area of the CRC/Transregio 32: "Patterns in Soil-Vegetation-Atmosphere Systems: monitoring, modelling and data assimilation", which is the catchment of the river Rur. The study area is mainly situated in the western part of North Rhine-Westphalia (Germany) and parts of the Netherlands and Belgium, covering an area of approximately 2365 square kilometres. The land use classification is derived from a supervised, multi temporal remote sensing data analysis using "Advanced Spaceborne Thermal Emission and Reflection Radiometer" (ASTER) and RapidEye data. ASTER is a multispectral satellite sensor, which has three bands in the visible and near infrared (VNIR) with 15 m spatial resolution, six bands in the shortwave infrared (SWIR) with 30 m, and five bands in the thermal infrared (TIR) with 90 m. For the land use classification the VNIR data acquired on July 27, 2009 were used. Each sensor of the RapidEye earth observation satellite system has five multispectral bands in the visible to near infrared wavelength region with a spatial resolution of 6.5 m. The incorporated data set was acquired on May 24, 2009. To enhance the information content of the land use data the Multi-Data Approach was used to combine the remote sensing data with additional data sets like the "Authorative Topographic-Cartographic Information System" (ATKIS Basic-DLM). The classification is provided in GeoTIFF and in ASCII format. Spatial resolution: 15 m; projection: WGS84, UTM Zone 32N.
# 4
KTB, WG Geochemistry
Abstract: Infrared-Spectrometry on Cutting Samples of the KTB Main Hole (Drill Section HB1i), 8732-9101 m.
# 5
KTB, WG Geochemistry
Abstract: Infrared-Spectrometry on Cutting Samples of the KTB Main Hole (Drill Section HB1h), 7392-8728 m.
# 6
KTB, WG Geochemistry
Abstract: Infrared-Spectrometry on Cutting Samples of the KTB Main Hole (Drill Section HB1g), 7220-8322 m.
# 7
KTB, WG Geochemistry
Abstract: Infrared-Spectrometry on Cutting Samples of the KTB Main Hole (Drill Section HB1d), 6770-7218 m.
# 8
KTB, WG Geochemistry
Abstract: Infrared-Spectrometry on Cutting Samples of the KTB Main Hole (Drill Section HB1a), 5596-6760 m.
# 9
KTB, WG Geochemistry
Abstract: Infrared-Spectrometry on Cutting Samples of the KTB Main Hole (Drill Section HB1), 7-5590 m.
# 10
KTB, WG Geochemistry
Abstract: The main objective of this drilling fluid analysis was the detection of inflows of formation fluids. Therefore different gases dissolved in the drilling mud were measured continuously and automatically at drill site with three different methodes (Fig.: KTB-Report 92-2 page C13). The operation principles of the mass spectrometer and the gaschromatograph have been explained by STROH et al. (1988) and FIGGEMEIER et al. (1991). The principle of radon determination is published by ERZINGER et al. (1992).
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