39. crustal structure along the leg 152 drilling transect
... data (Larsen and Thorning, 1980), 24-fold 7-s MCS data (with regional sonobuoy refraction data; Larsen and Jakobsdóttir, 1988), 6fold 3-s high-resolution data (Larsen et al., 1994b), and deeper 60fold 14-s MCS data (with some wide-angle data close to the shore). In addition, regional marine gravity, ...
... data (Larsen and Thorning, 1980), 24-fold 7-s MCS data (with regional sonobuoy refraction data; Larsen and Jakobsdóttir, 1988), 6fold 3-s high-resolution data (Larsen et al., 1994b), and deeper 60fold 14-s MCS data (with some wide-angle data close to the shore). In addition, regional marine gravity, ...
Kings Mountain National Military Park Geologic Resources Inventory
... and applicability to a broad readership in the National Park Service and to others in the management of natural resources, including the scientific community, the public, and the NPS conservation and environmental constituencies. Manuscripts are peer-reviewed to ensure that the information is scient ...
... and applicability to a broad readership in the National Park Service and to others in the management of natural resources, including the scientific community, the public, and the NPS conservation and environmental constituencies. Manuscripts are peer-reviewed to ensure that the information is scient ...
A crustal transect across the Oman Mountains
... Data Data used in the seismic interpretation consisted of 152 km of 2-D reflection profiles along the transect (Figure 3), 100 km of which were in digital form and 52 km were analog paper copies. Seismic reflection data processing involved depth conversion of the 2-D seismic profiles using stack and ...
... Data Data used in the seismic interpretation consisted of 152 km of 2-D reflection profiles along the transect (Figure 3), 100 km of which were in digital form and 52 km were analog paper copies. Seismic reflection data processing involved depth conversion of the 2-D seismic profiles using stack and ...
The Kaapvaal craton (South Africa): no evidence for a supercontinental
... with no evidence of any major terrane amalgamations with the Kaapvaal. From ~26422432 Ma, the craton was drowned with a long-lived epeiric marine carbonate-banded iron formation platform covering much of it, and preserved in all three Transvaal basins. During this general period, at ~2691-2610 Ma, K ...
... with no evidence of any major terrane amalgamations with the Kaapvaal. From ~26422432 Ma, the craton was drowned with a long-lived epeiric marine carbonate-banded iron formation platform covering much of it, and preserved in all three Transvaal basins. During this general period, at ~2691-2610 Ma, K ...
fracture analysis of surface- and through-cracked
... of the net-section stress (solid line). The slope of the line is a negative m. If the applied stress is greater than the uniaxial yield stress, the function F becomes non-linear and is estimated by the dashed curve. Because the state of stress in the region of the crack front is not uniaxial and the ...
... of the net-section stress (solid line). The slope of the line is a negative m. If the applied stress is greater than the uniaxial yield stress, the function F becomes non-linear and is estimated by the dashed curve. Because the state of stress in the region of the crack front is not uniaxial and the ...
FOSI BeritaSedimentologi BS 23 March2012
... (IAGI) in 1996. About 300 members were registered in 1999, including industrial and academic fellows, as well as students. ...
... (IAGI) in 1996. About 300 members were registered in 1999, including industrial and academic fellows, as well as students. ...
Cambrian palaeomagnetic data confirm a Natal Embayment location
... of conglomerates, quartzites, argillites and mafic lava. Lateral facies variations reveal a northward change in depositional environment from coarse-grained fluvial deposits, through transitional deltaic to fine-grained shallow marine units. The Springer Peak Formation is estimated to be 1000 m thic ...
... of conglomerates, quartzites, argillites and mafic lava. Lateral facies variations reveal a northward change in depositional environment from coarse-grained fluvial deposits, through transitional deltaic to fine-grained shallow marine units. The Springer Peak Formation is estimated to be 1000 m thic ...
Sedimentary Phosphate Deposits Mineral Deposit Profile F07
... layer, creating favourable conditions for intense algal bloom. Algae die, or are eaten by other life forms, then accumulate on the seafloor as fecal pellets and/or organic debris beneath sites of active coastal upwelling. Decomposition of organic debris in an oxygen-deprived environment by bacteria ...
... layer, creating favourable conditions for intense algal bloom. Algae die, or are eaten by other life forms, then accumulate on the seafloor as fecal pellets and/or organic debris beneath sites of active coastal upwelling. Decomposition of organic debris in an oxygen-deprived environment by bacteria ...
The Relevance of Brittle Fault Zones in Tunnel Construction
... construction of the Brixlegg-East and Vomp-East reconBrittle fault zones have great influence on underground naissance tunnels, different types of brittlely deformed construction projects, especially in the case of deep lying rocks were encountered and led to serious tunnel engineertunnels, where th ...
... construction of the Brixlegg-East and Vomp-East reconBrittle fault zones have great influence on underground naissance tunnels, different types of brittlely deformed construction projects, especially in the case of deep lying rocks were encountered and led to serious tunnel engineertunnels, where th ...
Mineral deposits and structural pattern of the Big Burro Mountains
... explores some region of New Mexico (or surrounding states). Always well attended, these conferences provide a guidebook to participants. Besides detailed road logs, the guidebooks contain many well written, edited, and peer-reviewed geoscience papers. These books have set the national standard for g ...
... explores some region of New Mexico (or surrounding states). Always well attended, these conferences provide a guidebook to participants. Besides detailed road logs, the guidebooks contain many well written, edited, and peer-reviewed geoscience papers. These books have set the national standard for g ...
Document
... airborne magnetic and electromagnetic data and shows examples of the types of geological feature that can be identified from the data on a regional scale. A few comments on the radiometric results are also included together with a brief evaluation of the mineral potential of Northern Ireland based o ...
... airborne magnetic and electromagnetic data and shows examples of the types of geological feature that can be identified from the data on a regional scale. A few comments on the radiometric results are also included together with a brief evaluation of the mineral potential of Northern Ireland based o ...
The strength of faults in the crust in the western
... element code instead of a flat-Earth one in order to avoid unphysical boundary conditions at the edges of our area of interest. A global code has never been used before to model the behavior of a regional area in such detail, therefore our work is as much an investigation of fault strength as it is a ...
... element code instead of a flat-Earth one in order to avoid unphysical boundary conditions at the edges of our area of interest. A global code has never been used before to model the behavior of a regional area in such detail, therefore our work is as much an investigation of fault strength as it is a ...
Recommendations for Exploration 2013-2014
... new information or concepts derivative from the current year’s activities. Please review our current recommendations and feel free to discuss these in detail with any of our geoscientists. ...
... new information or concepts derivative from the current year’s activities. Please review our current recommendations and feel free to discuss these in detail with any of our geoscientists. ...
Metasedimentary rocks, associated intrusions and tec
... aerial photo coverage to identify apparent fold structures and went on to confirm their existence by detailed field studies involving measurement of foliation surfaces, fold axes and lineations. He concluded that the granitic rocks were formed “synkinematically through the transformation of a pre-ex ...
... aerial photo coverage to identify apparent fold structures and went on to confirm their existence by detailed field studies involving measurement of foliation surfaces, fold axes and lineations. He concluded that the granitic rocks were formed “synkinematically through the transformation of a pre-ex ...
Regional Geologic Setting and Volcanic Stratigraphy
... northern portion where first-order mapping and stratigraphic studies are complete, and a southern portion where first-order studies are still in progress. Our discussion of the northern portion of the field is based primarily on work by the U. S. Geological Survey for the Challis 1 x 2 degree CUSMAP ...
... northern portion where first-order mapping and stratigraphic studies are complete, and a southern portion where first-order studies are still in progress. Our discussion of the northern portion of the field is based primarily on work by the U. S. Geological Survey for the Challis 1 x 2 degree CUSMAP ...
Microseismicity and focal mechanisms at the western termination of
... This region lies outside our network. Because the strongest event (Md>4.5) and the related aftershocks were also recorded by the permanent network of the Aristotle University of Thessaloniki, we could determine more precise locations than would have been possible with our network alone and we comput ...
... This region lies outside our network. Because the strongest event (Md>4.5) and the related aftershocks were also recorded by the permanent network of the Aristotle University of Thessaloniki, we could determine more precise locations than would have been possible with our network alone and we comput ...
Gulf of Mexico tectonic history: Hotspot tracks, crustal
... to define the size, shape, and extent of major structures in the basin and at its margins. Integration of gravity and seismic refraction data to interpret the Gulf of Mexico Basin has been practiced since the mid-1960s via two-dimensional (2-D) gravity models constrained by depths and densities deri ...
... to define the size, shape, and extent of major structures in the basin and at its margins. Integration of gravity and seismic refraction data to interpret the Gulf of Mexico Basin has been practiced since the mid-1960s via two-dimensional (2-D) gravity models constrained by depths and densities deri ...
Highland Valley Property 43-101 - MOAG Copper
... hectares (36 square miles). There is a long history of mineral exploration in the vicinity of the Property. Intensive field exploration began in the late 1800’s -- and very small-scale mining commenced at about the same time. More than 40 accounts of prior exploration were consulted in the preparati ...
... hectares (36 square miles). There is a long history of mineral exploration in the vicinity of the Property. Intensive field exploration began in the late 1800’s -- and very small-scale mining commenced at about the same time. More than 40 accounts of prior exploration were consulted in the preparati ...
Post-Paleozoic activity
... stable forelands; 3, orogenic deformational fronts; and 4, major continental fracture zones. After Arthaud and Matte, 1977; and Ziegler, 1982. Inset, modified from Arthaud and Matte, 1977, showing Variscan shear zone, interpreted as a 2,000-km-wide Riedel shear system that led to the formation of th ...
... stable forelands; 3, orogenic deformational fronts; and 4, major continental fracture zones. After Arthaud and Matte, 1977; and Ziegler, 1982. Inset, modified from Arthaud and Matte, 1977, showing Variscan shear zone, interpreted as a 2,000-km-wide Riedel shear system that led to the formation of th ...
Pull-apart basins at releasing bends of the sinistral Late Jurassic
... accumulated in basins formed within zones of dilation at releasing bends. Several basins that appear to have pull-apart origins are described below with the intent to provide information about age of formation, regional distribution, and stratigraphic and structural characteristics. Stratigraphic se ...
... accumulated in basins formed within zones of dilation at releasing bends. Several basins that appear to have pull-apart origins are described below with the intent to provide information about age of formation, regional distribution, and stratigraphic and structural characteristics. Stratigraphic se ...
Crustal thickness variation in south
... synthetics, similar to Sheehan et al. (1995). An F test is used to generate confidence limits on a fully nonlinear grid search (see Ferris et al., 2003). Each stack provides one crustal thickness estimate. The lateral offset of the Moho piercing point was determined for each stack. The lateral offse ...
... synthetics, similar to Sheehan et al. (1995). An F test is used to generate confidence limits on a fully nonlinear grid search (see Ferris et al., 2003). Each stack provides one crustal thickness estimate. The lateral offset of the Moho piercing point was determined for each stack. The lateral offse ...
Author`s personal copy
... underlain by the Pelagian Platform with Mesozoic carbonates that include the Pantelleria–Malta grabens as well as the Malta plateau. The Iblean plateau located onshore in the SE of Sicily is the major subaerial exposure of the Pelagian platform. This setting firmly ties the geology of Sicily to that ...
... underlain by the Pelagian Platform with Mesozoic carbonates that include the Pantelleria–Malta grabens as well as the Malta plateau. The Iblean plateau located onshore in the SE of Sicily is the major subaerial exposure of the Pelagian platform. This setting firmly ties the geology of Sicily to that ...
Stratigraphy and Structure Canberra 1:50 000 Geological Map Area
... base of the Canberra Group has been lowered to include the Camp Hill Sandstone, which is thought to conformably underlie the Turner Mudstone, and the upper limit of the Canberra Group has been raised to include the St John's Church Beds which are known to conformably overlie the City Hill Shale. Opi ...
... base of the Canberra Group has been lowered to include the Camp Hill Sandstone, which is thought to conformably underlie the Turner Mudstone, and the upper limit of the Canberra Group has been raised to include the St John's Church Beds which are known to conformably overlie the City Hill Shale. Opi ...
Water-rock interaction observed in the brittle-plastic transition zone
... are numerous zones of localized deformation with a thickness of mm to cm scale. Such deformation localized zones are abundant in the central part of the outcrop, where deformation is strong. Sometimes the central part of deformation localized zones is crushed and epidote fracture-fill is present (Fi ...
... are numerous zones of localized deformation with a thickness of mm to cm scale. Such deformation localized zones are abundant in the central part of the outcrop, where deformation is strong. Sometimes the central part of deformation localized zones is crushed and epidote fracture-fill is present (Fi ...
CHAPTER 9 RECONNAISSANCE PHOTOGEOLOGIC MAP OF
... lava flows extend from the range crest to the axis of the adjacent basin documenting extensive and widely distributed post-late-Miocene faulting across the intervening piedmont; however, no evidence of faulting is visible on the adjacent piedmont surface. This faulting, which is clearly defined by p ...
... lava flows extend from the range crest to the axis of the adjacent basin documenting extensive and widely distributed post-late-Miocene faulting across the intervening piedmont; however, no evidence of faulting is visible on the adjacent piedmont surface. This faulting, which is clearly defined by p ...
TaskForceMajella
The TaskForceMajella (TFM) is an industry funded geoscientific research project conducted between the years 1998 and 2005. The project involved numerous universities distributed worldwide, and was sponsored by a number of international major oil companies. The area of research was the Majella Mountain in Central Italy, regarded as an analogue of a faulted and fractured hydrocarbon reservoir as can be found in major provinces like the Middle East, Caspian Basin, Mediterranean Basin, and other areas. The scope was to obtain knowledge on the relation between fracture and fault generation, and all types of geological aspects of the evolution of the geological structure.