geo.tu-freiberg.de - TU Bergakademie Freiberg
... The Westphalian macrofloral record from the cratonic Central Pennines Basin, UK First results from the 2004 expedition to the lower Permian of Sumatra: are the different plant associations from the Mengkarang Formation related to differences in lithofacies? ...
... The Westphalian macrofloral record from the cratonic Central Pennines Basin, UK First results from the 2004 expedition to the lower Permian of Sumatra: are the different plant associations from the Mengkarang Formation related to differences in lithofacies? ...
CPC-2014 - TU Freiberg
... we, the members of the Department of Palaeontology of Freiberg University are very delighted to welcome you to this international meeting at our faculty! We are pleased to welcome colleagues from eleven countries of five continents and we hope that you enjoy the scientific programm and excursion, bu ...
... we, the members of the Department of Palaeontology of Freiberg University are very delighted to welcome you to this international meeting at our faculty! We are pleased to welcome colleagues from eleven countries of five continents and we hope that you enjoy the scientific programm and excursion, bu ...
Mafic to Intermediate Plutons
... Metamorphism Samples have been variably metamorphosed under medium pressures and temperatures in the amphibolite facies with differing degrees of metamorphic fabric present. Relict igneous textures and minerals (clinopyroxene) have been overprinted by metamorphic processes, both prograde and retrogr ...
... Metamorphism Samples have been variably metamorphosed under medium pressures and temperatures in the amphibolite facies with differing degrees of metamorphic fabric present. Relict igneous textures and minerals (clinopyroxene) have been overprinted by metamorphic processes, both prograde and retrogr ...
Lecture 6
... be vertical, inclined or even horizontal. There dip and strike are measured in the same way as that of sedimentary strata. Formation of Joints: Joints are formed as a result of contraction due to cooling or consolidation of rocks. They are also formed when rocks are subjected to compression or tensi ...
... be vertical, inclined or even horizontal. There dip and strike are measured in the same way as that of sedimentary strata. Formation of Joints: Joints are formed as a result of contraction due to cooling or consolidation of rocks. They are also formed when rocks are subjected to compression or tensi ...
File
... vertical and the two limbs have the same amount of dip. Asymmetrical folds: An asymmetrical folds is one where the axial plane is inclined and the limbs dip at different angles, and in opposite directions. Overturned folds: Overturned folds is one in which the axial plane is inclined and one limb is ...
... vertical and the two limbs have the same amount of dip. Asymmetrical folds: An asymmetrical folds is one where the axial plane is inclined and the limbs dip at different angles, and in opposite directions. Overturned folds: Overturned folds is one in which the axial plane is inclined and one limb is ...
File
... be vertical, inclined or even horizontal. There dip and strike are measured in the same way as that of sedimentary strata. Formation of Joints: Joints are formed as a result of contraction due to cooling or consolidation of rocks. They are also formed when rocks are subjected to compression or tensi ...
... be vertical, inclined or even horizontal. There dip and strike are measured in the same way as that of sedimentary strata. Formation of Joints: Joints are formed as a result of contraction due to cooling or consolidation of rocks. They are also formed when rocks are subjected to compression or tensi ...
provenance analysis and detrital zircons: keys to - ETH E
... sedimentary rocks in these accretionary complexes permits understanding the Cretaceous to Paleogene geological evolution, the geodynamic context and the tectonic-sedimentation relationships. The multidisciplinary provenance study, including sandstone framework, heavy mineral analysis, in situ U-Pb d ...
... sedimentary rocks in these accretionary complexes permits understanding the Cretaceous to Paleogene geological evolution, the geodynamic context and the tectonic-sedimentation relationships. The multidisciplinary provenance study, including sandstone framework, heavy mineral analysis, in situ U-Pb d ...
27 Mineralogy and geochemistry of recent detrital sediments from
... evolved (felsic) material in the source rocks [47]. The alkaline oxides (Na2O and K2O) have relatively high contents, those in Na2O vary from 0.03 to 2.4 wt.% and those in K 2O from 0.85 to 2 wt.%. Besides, the contents in Na2O of the alluvial materials of the first alluvial profile are quite higher ...
... evolved (felsic) material in the source rocks [47]. The alkaline oxides (Na2O and K2O) have relatively high contents, those in Na2O vary from 0.03 to 2.4 wt.% and those in K 2O from 0.85 to 2 wt.%. Besides, the contents in Na2O of the alluvial materials of the first alluvial profile are quite higher ...
Support of high elevation in the southern Basin and Range based
... crust atop normal mantle or alternatively normal lower crust atop fast or high density mantle. The receiver functions show few converted phases below the Moho Ps. There is evidence of a diffuse 5% positive Ps (B) at 40–55 km beneath all stations except DSRT (Fig. 2). Noise may obscure this interface ...
... crust atop normal mantle or alternatively normal lower crust atop fast or high density mantle. The receiver functions show few converted phases below the Moho Ps. There is evidence of a diffuse 5% positive Ps (B) at 40–55 km beneath all stations except DSRT (Fig. 2). Noise may obscure this interface ...
Thrust-top basin formation along a suture
... provides direct evidence that thrust fault deformation and lower Cantwell Formation sedimentation were synchronous. Distinctive Cantwell Formation conglomerate clasts derived from the uplifted hanging walls of nearby thrust sheets adjacent to the southern basin margin also support a syndepositional ...
... provides direct evidence that thrust fault deformation and lower Cantwell Formation sedimentation were synchronous. Distinctive Cantwell Formation conglomerate clasts derived from the uplifted hanging walls of nearby thrust sheets adjacent to the southern basin margin also support a syndepositional ...
Plate Tectonic Evolution and Mineral Resource
... the Lancang River Zone (Lancangjiang) is believed to hold a key position in tracing the major divide between Gondwana and Eurasia and has been the subject of a range of interpretations since the early 1980’s. This study re-evaluates the existing data and presents an integrated tectono-sedimentologic ...
... the Lancang River Zone (Lancangjiang) is believed to hold a key position in tracing the major divide between Gondwana and Eurasia and has been the subject of a range of interpretations since the early 1980’s. This study re-evaluates the existing data and presents an integrated tectono-sedimentologic ...
Thermo-rheological, shear heating model for leucogranite
... This paper evaluates thermotectonic models for metamorphism and leucogranite generation during the Proterozoic TransHudson orogeny, as recorded in rocks exposed in the Black Hills, SD. Intrusion of the Harney Peak Granite and associated pegmatites at 1715 Ma occurred at the waning stages of region ...
... This paper evaluates thermotectonic models for metamorphism and leucogranite generation during the Proterozoic TransHudson orogeny, as recorded in rocks exposed in the Black Hills, SD. Intrusion of the Harney Peak Granite and associated pegmatites at 1715 Ma occurred at the waning stages of region ...
UNITED STATES DEPARTMENT OF THE INTERIOR CECIL D
... amphibolite-facies gneisses, greenschist-facies fine-grained siliceous and carbonaceous metasedimentary rocks, and a variety of carbonate rocks. Lithologic units within the metamorphic terrane trend generally north-northeast and dip moderately toward the southeast. Thrust faults locally juxtapose li ...
... amphibolite-facies gneisses, greenschist-facies fine-grained siliceous and carbonaceous metasedimentary rocks, and a variety of carbonate rocks. Lithologic units within the metamorphic terrane trend generally north-northeast and dip moderately toward the southeast. Thrust faults locally juxtapose li ...
Aseismic zone and earthquake segmentation associated with a
... If we take 47 mm yr−1 as the subduction rate in the direction orthogonal to the trench14 , then the seamount would have been at the subduction front around ∼4 Myr ago. The age of volcanism on the oceanic plate is not well known, but the age of the lithosphere is about 68 Myr (ref. 28), and hence it ...
... If we take 47 mm yr−1 as the subduction rate in the direction orthogonal to the trench14 , then the seamount would have been at the subduction front around ∼4 Myr ago. The age of volcanism on the oceanic plate is not well known, but the age of the lithosphere is about 68 Myr (ref. 28), and hence it ...
A Dynamic Model of Rifting Between Galicia Bank and Flemish Cap
... cross section in Fig. 2. Restoration of the cross section to a uniform crust thickness of 32 km requires an extension rate of 20 mm/yr to produce the observed amount of stretching in 25 m.y. Pre-rift lithospheric structure, rheology, and thermal constraints – Breakup between the Galicia Bank and New ...
... cross section in Fig. 2. Restoration of the cross section to a uniform crust thickness of 32 km requires an extension rate of 20 mm/yr to produce the observed amount of stretching in 25 m.y. Pre-rift lithospheric structure, rheology, and thermal constraints – Breakup between the Galicia Bank and New ...
Ocean Drilling Program Initial Reports Volume 160
... carbonates, again of middle Eocene age, were recovered farther south at Site 966. The sedimentary structures and the nature of the benthic foraminifers indicate a bathyal, relatively deep-water environment, with pelagic carbonate deposition in a regionally stable tectonic setting, free of input from ...
... carbonates, again of middle Eocene age, were recovered farther south at Site 966. The sedimentary structures and the nature of the benthic foraminifers indicate a bathyal, relatively deep-water environment, with pelagic carbonate deposition in a regionally stable tectonic setting, free of input from ...
Imaging subduction from the trench to 300 km depth beneath the
... mantle of the subducted slab is almost always >8.5 km s−1 , which requires the ca. 120 Myr slab to be unusually cold. The low Vp/Vs within the subducted plate closely parallels the lower plane of the dipping seismic zone. It most likely indicates fluid resulting from dehydration of serpentine in the ...
... mantle of the subducted slab is almost always >8.5 km s−1 , which requires the ca. 120 Myr slab to be unusually cold. The low Vp/Vs within the subducted plate closely parallels the lower plane of the dipping seismic zone. It most likely indicates fluid resulting from dehydration of serpentine in the ...
No. 51. The Sveconorwegian Orogen of southern Scandinavia
... segments that were displaced and reworked during a succession of compressional (and extensional) orogenic phases at between 1.14-0.96 Ga. Sveconorwegian orogenesis culminated in a continent-continent collision phase at 0.98-0.96 Ga that involved regional scale high-pressure granulite metamorphism an ...
... segments that were displaced and reworked during a succession of compressional (and extensional) orogenic phases at between 1.14-0.96 Ga. Sveconorwegian orogenesis culminated in a continent-continent collision phase at 0.98-0.96 Ga that involved regional scale high-pressure granulite metamorphism an ...
The role of basement inheritance faults in the recent fracture system
... Spatial variation in fracture orientation was calculated by means of a grid of square cells, representing the length and number of fractures in each cell (Fig. 6a). The results show a ubiquitous pattern of dominant NW–SE direction, with secondary maxima similar to those obtained in the analysis of t ...
... Spatial variation in fracture orientation was calculated by means of a grid of square cells, representing the length and number of fractures in each cell (Fig. 6a). The results show a ubiquitous pattern of dominant NW–SE direction, with secondary maxima similar to those obtained in the analysis of t ...
suprastrcuture of the metamorphic terrains in south bulgaria
... (Fig. 3a,b). Because of which their geometry is difficult to study and understand. Sub-vertical fracture or crenulation cleavage is usually related to the upright folds. Only small number of F 1s and F1r folds is directly observable on the field (e.g. the Marvodol synformal anticline in Southwest Bu ...
... (Fig. 3a,b). Because of which their geometry is difficult to study and understand. Sub-vertical fracture or crenulation cleavage is usually related to the upright folds. Only small number of F 1s and F1r folds is directly observable on the field (e.g. the Marvodol synformal anticline in Southwest Bu ...
Metamorphic reworking of a high pressure–low temperature
... strongly overprinted by a lower pressure assemblage and, along with associated HP/LT rocks, give much younger 40Ar/39Ar ages of 88–55 Ma indicating a later amphibolite facies metamorphic event. We propose therefore that all serpentinite hosted eclogites along the Motagua fault formed at essentially ...
... strongly overprinted by a lower pressure assemblage and, along with associated HP/LT rocks, give much younger 40Ar/39Ar ages of 88–55 Ma indicating a later amphibolite facies metamorphic event. We propose therefore that all serpentinite hosted eclogites along the Motagua fault formed at essentially ...
Heterogeneous crustal deformation along the central-northern
... was not a step-like one but a trend change. We need more detailed investigation for this deformation in the future. At station 950268, E-W displacement time series show irregular changes, which may be attributed to a volcanic activity of Mt. Asama. We calculated a displacement rate for each GPS stat ...
... was not a step-like one but a trend change. We need more detailed investigation for this deformation in the future. At station 950268, E-W displacement time series show irregular changes, which may be attributed to a volcanic activity of Mt. Asama. We calculated a displacement rate for each GPS stat ...
EPS116_chapter4
... Listric normal faults: concave upward faults whose dip decreases with increasing depth. Features of fault surfaces are variable and depend on the fault’s shape, the depth of movement, and brittle vs. ductile deformation. Surface features such as cataclastic rocks and slickensides are evidence of nor ...
... Listric normal faults: concave upward faults whose dip decreases with increasing depth. Features of fault surfaces are variable and depend on the fault’s shape, the depth of movement, and brittle vs. ductile deformation. Surface features such as cataclastic rocks and slickensides are evidence of nor ...
55. The Western Rockall Plateau
... trends northeast-southwest parallel to the northwest margin of the plateau. At 57°N, the main part of the basin consists of a 60-km-wide graben underlain by an irregular relief of about 0.5 s that may be indicative of block faulting. At 57°N, there is a major change in the trend, structure and depth ...
... trends northeast-southwest parallel to the northwest margin of the plateau. At 57°N, the main part of the basin consists of a 60-km-wide graben underlain by an irregular relief of about 0.5 s that may be indicative of block faulting. At 57°N, there is a major change in the trend, structure and depth ...
Lithosphere
... blocks defined by bedding orientations, wireline log character, physical properties, and lithologic characteristics. A clay-rich zone between 2530 and 2680 mmd is characterized by low Vp and an enlarged borehole. The lower arkose lies between 2680 and 3150 mmd. Fission-track detrital zircon cooling ...
... blocks defined by bedding orientations, wireline log character, physical properties, and lithologic characteristics. A clay-rich zone between 2530 and 2680 mmd is characterized by low Vp and an enlarged borehole. The lower arkose lies between 2680 and 3150 mmd. Fission-track detrital zircon cooling ...