lithosphere 2006 - Helsingin yliopisto
... T. Stålfors, C. Ehlers and A. Johnson. The granite-migmatite zone of southern Finland – A history of structural control and intrusions I.T. Kukkonen and L.S. Lauri. Modelling the thermal evolution of a Precambrian orogen: high heat production migmatitic granites of southern Finland L.S. Lauri, M. Cu ...
... T. Stålfors, C. Ehlers and A. Johnson. The granite-migmatite zone of southern Finland – A history of structural control and intrusions I.T. Kukkonen and L.S. Lauri. Modelling the thermal evolution of a Precambrian orogen: high heat production migmatitic granites of southern Finland L.S. Lauri, M. Cu ...
TECTONIC ANALYSIS OF NORTHWESTERN SOUTH AMERICA
... includes a complex and dangerous mosaic of tectonic plates that have produced devastating earthquakes, tsunamis, volcanic eruptions and landslides in the last decades. The region’s economic development has also seriously suffered because the region is poorly explored for natural resources. To more e ...
... includes a complex and dangerous mosaic of tectonic plates that have produced devastating earthquakes, tsunamis, volcanic eruptions and landslides in the last decades. The region’s economic development has also seriously suffered because the region is poorly explored for natural resources. To more e ...
Geosciences Course Descriptions - The University of Texas at Dallas
... selected region within North America and the Caribbean followed by a field trip to the selected region in order to study the relationships of geologic features within that region. This course can only be used to partially satisfy the field experience requirement and breadth requirement for geoscienc ...
... selected region within North America and the Caribbean followed by a field trip to the selected region in order to study the relationships of geologic features within that region. This course can only be used to partially satisfy the field experience requirement and breadth requirement for geoscienc ...
The Earth`s mantle
... bulk modulus K and density r are available, even under lowermantle conditions21,22, so © = KS/r = v2P - (4/3)v2S, rather than the individual seismic velocities vP and vS, provides a well-constrained comparison between seismology and mineralogical properties. (Here vP and vS are the velocities of P a ...
... bulk modulus K and density r are available, even under lowermantle conditions21,22, so © = KS/r = v2P - (4/3)v2S, rather than the individual seismic velocities vP and vS, provides a well-constrained comparison between seismology and mineralogical properties. (Here vP and vS are the velocities of P a ...
Supracrustal faults of the St. Lawrence rift system, Québec
... in Fig. 4A, particularly for NW- and SE-striking faults, may have been introduced by the existence of impact-related faults in this segment of the St. Lawrence rift system. 3.2. Nature of fault rocks Coastal sections of the St. Lawrence River that best expose the various types of fault rocks related ...
... in Fig. 4A, particularly for NW- and SE-striking faults, may have been introduced by the existence of impact-related faults in this segment of the St. Lawrence rift system. 3.2. Nature of fault rocks Coastal sections of the St. Lawrence River that best expose the various types of fault rocks related ...
Continent-sized anomalous zones with low
... LLSVP agree with large low δVP zones that explain P-wave corephase travel times11. If some regions exhibit disagreement between lower mantle δVS and δVP structure, a mechanism that affects VP differently from VS is required to explain the disagreement, such as the post-perovskite phase transition, a ...
... LLSVP agree with large low δVP zones that explain P-wave corephase travel times11. If some regions exhibit disagreement between lower mantle δVS and δVP structure, a mechanism that affects VP differently from VS is required to explain the disagreement, such as the post-perovskite phase transition, a ...
Mantle-driven deformation of orogenic zones and clutch tectonics
... creep must be active in at least the upper 250300 km of the mantle, since diffusion creep does not produce an LPO. This inference is consistent with experimental deformation, which suggests that dislocation creep occurs in olivine aggregates at upper mantle temperatures and pressures (e.g. Zhang & K ...
... creep must be active in at least the upper 250300 km of the mantle, since diffusion creep does not produce an LPO. This inference is consistent with experimental deformation, which suggests that dislocation creep occurs in olivine aggregates at upper mantle temperatures and pressures (e.g. Zhang & K ...
Cascadia subducting plate fluids channelled to fore
... released. Although the breakdown temperatures and pressures are quite well known from laboratory studies, metastability and slow release mean that the depth of fluid release is not accurately known. The water production rate from the crust has been estimated to be about 0.1 mm/yr from these sources, ...
... released. Although the breakdown temperatures and pressures are quite well known from laboratory studies, metastability and slow release mean that the depth of fluid release is not accurately known. The water production rate from the crust has been estimated to be about 0.1 mm/yr from these sources, ...
An olivine-free mantle source of Hawaiian shield basalts
... More than 50 per cent of the Earth’s upper mantle consists of olivine and it is generally thought that mantle-derived melts are generated in equilibrium with this mineral. Here, however, we show that the unusually high nickel and silicon contents of most parental Hawaiian magmas are inconsistent wit ...
... More than 50 per cent of the Earth’s upper mantle consists of olivine and it is generally thought that mantle-derived melts are generated in equilibrium with this mineral. Here, however, we show that the unusually high nickel and silicon contents of most parental Hawaiian magmas are inconsistent wit ...
Journal of Volcanology and Geothermal Research
... Integration of geophysical and geological data show that the Yellowstone hotspot resulted from a mantle plume interacting with the overriding North America plate, a process that has highly modified continental lithosphere by magmatic and tectonic processes and produced the 16-17 Ma, 700-km-long Yello ...
... Integration of geophysical and geological data show that the Yellowstone hotspot resulted from a mantle plume interacting with the overriding North America plate, a process that has highly modified continental lithosphere by magmatic and tectonic processes and produced the 16-17 Ma, 700-km-long Yello ...
Receiver function constraints on crustal seismic velocities and
... did not obtain a viable variation of crustal structure across the rift axis. Refraction results from a profile, sourced near Assab in southeastern Eritrea with a WSW strike directed toward the Tendaho graben, inferred a crustal thickness between 26 and 28 km beneath the overlap zone but did not exten ...
... did not obtain a viable variation of crustal structure across the rift axis. Refraction results from a profile, sourced near Assab in southeastern Eritrea with a WSW strike directed toward the Tendaho graben, inferred a crustal thickness between 26 and 28 km beneath the overlap zone but did not exten ...
PDF
... persistent, low-amplitude tremor activity throughout the October 2003 through February 2007 period of monitoring. These signals exhibit either monochromatic or polychromatic spectral characteristics, with a 6 Hz fundamental frequency and up to two harmonics. Individual events cannot be correlated b ...
... persistent, low-amplitude tremor activity throughout the October 2003 through February 2007 period of monitoring. These signals exhibit either monochromatic or polychromatic spectral characteristics, with a 6 Hz fundamental frequency and up to two harmonics. Individual events cannot be correlated b ...
Constraints on the source parameters of low
... earthquake locations in cross section (note 4 times vertical compression). ...
... earthquake locations in cross section (note 4 times vertical compression). ...
FOSI BeritaSedimentologi BS 23 March2012
... The stratigraphy and tectonics of both areas need to be taken into account. Here, we draw on the tectonics and stratigraphy of the Browse Basin on the NW Shelf (Hill & Hoffman 2004; Hoffman & Hill 2004), the nearest area unaffected by Mesozoic and Tertiary orogenesis, and compare it to the tectonics ...
... The stratigraphy and tectonics of both areas need to be taken into account. Here, we draw on the tectonics and stratigraphy of the Browse Basin on the NW Shelf (Hill & Hoffman 2004; Hoffman & Hill 2004), the nearest area unaffected by Mesozoic and Tertiary orogenesis, and compare it to the tectonics ...
here - GeoPRISMS
... observations of the behavior of active plate boundaries, and tremendous investment into the infrastructure needed to carry out their investigation. Overall, MARGINS was a success exceeding expectations, paving the way for new discoveries through a successor program as recommended by the 2009 Decadal ...
... observations of the behavior of active plate boundaries, and tremendous investment into the infrastructure needed to carry out their investigation. Overall, MARGINS was a success exceeding expectations, paving the way for new discoveries through a successor program as recommended by the 2009 Decadal ...
seismic performance of double eps geofoam buffer systems
... Fig. 6. Seismic isolation efficiency in relation to the EPS panel spacing for double EPS geofoam buffer system with individual EPS panel thicknesses t1 = t2 = 60 cm. thicknesses (t1 = t2) of 30, 60 and 137.5 cm. The seismic isolation efficiency is defined as the difference between the peak dynamic t ...
... Fig. 6. Seismic isolation efficiency in relation to the EPS panel spacing for double EPS geofoam buffer system with individual EPS panel thicknesses t1 = t2 = 60 cm. thicknesses (t1 = t2) of 30, 60 and 137.5 cm. The seismic isolation efficiency is defined as the difference between the peak dynamic t ...