high-sulphidation, epithermal-style
... high-sulphidation alteration assemblage pyrophyllite–alunite–quartz–kaolinite–hematite–rutile–lazulite, are associated with discrete areas of massive and, locally, vuggy silicic alteration, containing gold, and anomalous concentrations of copper, arsenic and/or antimony. On the northern Burin Penins ...
... high-sulphidation alteration assemblage pyrophyllite–alunite–quartz–kaolinite–hematite–rutile–lazulite, are associated with discrete areas of massive and, locally, vuggy silicic alteration, containing gold, and anomalous concentrations of copper, arsenic and/or antimony. On the northern Burin Penins ...
palaeozoic porphyry molybdenum-tungsten deposit in the myszków
... been identified within a poorly defined belt of Precambrian to Palaeozoic rocks in south-central Poland. It is in a complex of Proterozoic (Vendian) to early Palaeozoic (Early Cambrian)-aged metasedimentary rocks that was intruded by a predominantly granodioritic pluton. The intrusive rocks and asso ...
... been identified within a poorly defined belt of Precambrian to Palaeozoic rocks in south-central Poland. It is in a complex of Proterozoic (Vendian) to early Palaeozoic (Early Cambrian)-aged metasedimentary rocks that was intruded by a predominantly granodioritic pluton. The intrusive rocks and asso ...
document - OurEnergyPolicy.org
... Exhibit 3-34 Structural framework map of the Val Verde subbasin and Marathon-Ouachita foldthrust belt, west Texas (structural details created with info from Shumaker, 1992; Barden and Franklin, 2003; and Enegis, LLC). The envisioned CO2 plume is localized along the Permian basin detachment with trap ...
... Exhibit 3-34 Structural framework map of the Val Verde subbasin and Marathon-Ouachita foldthrust belt, west Texas (structural details created with info from Shumaker, 1992; Barden and Franklin, 2003; and Enegis, LLC). The envisioned CO2 plume is localized along the Permian basin detachment with trap ...
Exploring Geology: What-To-Know List
... Describe and sketch how magma is generated in a subduction zone. Describe what happens when subduction-derived magma encounters overlying crust. Describe how water gets into a subduction zone. Explain and sketch how magma forms during continental collisions. Explain partial melting of cont ...
... Describe and sketch how magma is generated in a subduction zone. Describe what happens when subduction-derived magma encounters overlying crust. Describe how water gets into a subduction zone. Explain and sketch how magma forms during continental collisions. Explain partial melting of cont ...
Analcime phenocrysts in igneous rocks: Primary or secondary
... contain l-2o/oFerO,(Pearce,1970a).Karlssonand Clayton appear to be of the opinion (following Coombs and Whetten, 1967) that the Fe reported in analcime is present as inclusions. This is not true for the Crowsnestisotropic brown analcime (of the type illustrated in Fig. l). The mineral contains no tr ...
... contain l-2o/oFerO,(Pearce,1970a).Karlssonand Clayton appear to be of the opinion (following Coombs and Whetten, 1967) that the Fe reported in analcime is present as inclusions. This is not true for the Crowsnestisotropic brown analcime (of the type illustrated in Fig. l). The mineral contains no tr ...
The Eastern Offshore Extension into the Western Mediterranean of
... relict bars are northeast-southwest trending sediment waves with their steep sides facing southeast. Similar, but having less reliefs also occur in secondary bars between bars 7 and 8 parallel to La Manga (Fig. 3B). These sediment drifts have been reported as far north as the Columbretes Islands at ...
... relict bars are northeast-southwest trending sediment waves with their steep sides facing southeast. Similar, but having less reliefs also occur in secondary bars between bars 7 and 8 parallel to La Manga (Fig. 3B). These sediment drifts have been reported as far north as the Columbretes Islands at ...
Geology and geochronology of mineral deposits in the Biga
... based on descriptive data. The GIS database, consisting of 128 deposits or prospects, helped to generate new prospects and potential prospects. This field-based study indicated that the Biga Peninsula forms a prime target for gold–copper exploration not only in Turkey but in the world. The current ec ...
... based on descriptive data. The GIS database, consisting of 128 deposits or prospects, helped to generate new prospects and potential prospects. This field-based study indicated that the Biga Peninsula forms a prime target for gold–copper exploration not only in Turkey but in the world. The current ec ...
bedrock geology of the piedmont of delaware and adjacent
... The Appalachian Piedmont province of Delaware and adjacent Pennsylvania records the collision of a magmatic arc with a continental landmass and adjacent forearc basin sediments during the early Paleozoic. As a result of this collision, the rocks are intensely deformed and metamorphosed to the amphib ...
... The Appalachian Piedmont province of Delaware and adjacent Pennsylvania records the collision of a magmatic arc with a continental landmass and adjacent forearc basin sediments during the early Paleozoic. As a result of this collision, the rocks are intensely deformed and metamorphosed to the amphib ...
3 Tectonostratigraphic evolution of the Andean Orogen - U
... parallel to the strike of the range, and oroclinal bends around which are major changes in the orientation of the morphology and structure of the range (Fig. 3.1). Two oroclinal bends are present, comprising the Bolivian and the Patagonian oroclines, in northernmost and southernmost Chile respective ...
... parallel to the strike of the range, and oroclinal bends around which are major changes in the orientation of the morphology and structure of the range (Fig. 3.1). Two oroclinal bends are present, comprising the Bolivian and the Patagonian oroclines, in northernmost and southernmost Chile respective ...
short and long-term folding and faulting of the lithosphere under
... é como se inicia a deformação da litosfera sob compressão horizontal.“Falhamento e dobramento de curto e longo-termo da litosfera sob compressão” é um problema geofísico ainda não resolvido, apesar de vários estudos se terem debruçado sobre ele. Numa litosfera reologicamente estratificada, existe a ...
... é como se inicia a deformação da litosfera sob compressão horizontal.“Falhamento e dobramento de curto e longo-termo da litosfera sob compressão” é um problema geofísico ainda não resolvido, apesar de vários estudos se terem debruçado sobre ele. Numa litosfera reologicamente estratificada, existe a ...
Mitchell Range introduction: The Mitchell Range, 240 km northwest
... Core areas of boudins and dykes are usually most ...
... Core areas of boudins and dykes are usually most ...
Experimental Constraints on TTG Petrogenesis: Implications
... experimental melting of amphibolites allows a mineralogical model for amphibolite melting to be derived for three different starting lithologies. A major and trace element model for melt compositions is produced using the mineralogical model. This model suggests that TTGs formed at P > 15 kbar and T ...
... experimental melting of amphibolites allows a mineralogical model for amphibolite melting to be derived for three different starting lithologies. A major and trace element model for melt compositions is produced using the mineralogical model. This model suggests that TTGs formed at P > 15 kbar and T ...
Teacher Resouces Booklet - CIOSS
... The width of the Cascadia subduction zone fault varies along its length, depending on the temperature of the subducted oceanic plate, which heats up as it is pushed deeper beneath the continent. As it becomes hotter and more molten, it eventually loses the ability to store mechanical stress and gene ...
... The width of the Cascadia subduction zone fault varies along its length, depending on the temperature of the subducted oceanic plate, which heats up as it is pushed deeper beneath the continent. As it becomes hotter and more molten, it eventually loses the ability to store mechanical stress and gene ...
First- and Second-Order Patterns of Stress in the
... thickness of the upper brittle lithosphere. The "first-order" midplate stress fields are believed to be largely the result of compressional forces applied at plate boundaries, primarily ridge push and continental collision. The orientation of the intraplate stress field is thus largely controlled by ...
... thickness of the upper brittle lithosphere. The "first-order" midplate stress fields are believed to be largely the result of compressional forces applied at plate boundaries, primarily ridge push and continental collision. The orientation of the intraplate stress field is thus largely controlled by ...
The chemical composition of subducting sediment and its
... an ideal tracer of young surface materials. The presence of 10 Be in arc lavas, and its absence in lavas from other tectonic settings, has made sediment subduction and recycling to volcanic arcs not only vi- ...
... an ideal tracer of young surface materials. The presence of 10 Be in arc lavas, and its absence in lavas from other tectonic settings, has made sediment subduction and recycling to volcanic arcs not only vi- ...
Resolving the lithosphereasthenosphere boundary with seismic
... within the lithosphere and asthenosphere. It is still a matter of debate, however, how accurately and under what conditions surface waves can resolve the depth and thickness of the lithosphere–asthenosphere boundary (LAB). We investigate the sensitivity of Rayleigh waves to LAB properties and find t ...
... within the lithosphere and asthenosphere. It is still a matter of debate, however, how accurately and under what conditions surface waves can resolve the depth and thickness of the lithosphere–asthenosphere boundary (LAB). We investigate the sensitivity of Rayleigh waves to LAB properties and find t ...
Geophysics and Tectonics of the Snake River Plain, Idaho
... Snake River Plain in Idaho is well known and many shallow and a few deep holes have been drilled on the plain, major uncertainties remain concerning the structure of the plain. Seismic refraction profiles have revealed that under the plain a thin upper crust overlies a lower crust which is thicker t ...
... Snake River Plain in Idaho is well known and many shallow and a few deep holes have been drilled on the plain, major uncertainties remain concerning the structure of the plain. Seismic refraction profiles have revealed that under the plain a thin upper crust overlies a lower crust which is thicker t ...
Synthesis of Existing Structural Data for the Auckland Volcanic Field
... east end of the Whangaparaoa Peninsula. .................................................................... 48 Figure 19. Faulting within the Waitemata group on the Whangaparaoa Peninsula. ...... 51 Figure 20. Summary of observed and inferred fault orientations for the Auckland area.52 Figure 21. F ...
... east end of the Whangaparaoa Peninsula. .................................................................... 48 Figure 19. Faulting within the Waitemata group on the Whangaparaoa Peninsula. ...... 51 Figure 20. Summary of observed and inferred fault orientations for the Auckland area.52 Figure 21. F ...
ATLAS of plutonic rocks and orthogneisses in the Bohemian Massif
... migmatites and granitic plutons have found evidence which supports the view that granitic intrusions were initiated as crystal-poor silicic liquids rather than largely crystalline magmas (Pitcher 1993). Clusters of magmatic dykes often associated with volcanic rocks help to locate original volcanoes ...
... migmatites and granitic plutons have found evidence which supports the view that granitic intrusions were initiated as crystal-poor silicic liquids rather than largely crystalline magmas (Pitcher 1993). Clusters of magmatic dykes often associated with volcanic rocks help to locate original volcanoes ...
Late Mesozoic – Early Cenozoic structural evolution of - UiO
... 2008). Furthermore, Faleide et al. (2008) suggested that this horizon mark the transition to glacial sediment deposition during the Northern Hemisphere Glaciation since about 2.6 Ma. Large Plio-Pleistocene depocenters formed fans in front of bathymetric throughs scoured by ice streams eroding the sh ...
... 2008). Furthermore, Faleide et al. (2008) suggested that this horizon mark the transition to glacial sediment deposition during the Northern Hemisphere Glaciation since about 2.6 Ma. Large Plio-Pleistocene depocenters formed fans in front of bathymetric throughs scoured by ice streams eroding the sh ...
Volcanogenic Massive Sulfide Deposits
... volumes of rhyolite associated with many deposits are unlikely to have been responsible for large-scale hydrothermal convection. Rather, the spatial association with felsic volcanic rocks most likely reflects anomalous heat flow during rifting and partial melting of basaltic crust, generating the sm ...
... volumes of rhyolite associated with many deposits are unlikely to have been responsible for large-scale hydrothermal convection. Rather, the spatial association with felsic volcanic rocks most likely reflects anomalous heat flow during rifting and partial melting of basaltic crust, generating the sm ...
10. Stress and stress release in the lithosphere
... by the strong earthquake at the Japanese coastline in April 2011 that led to political shut-down of power plants in Germany - located more or less on the other side of the globe. A number of system components of the Fukushima nuclear power plant could not withstand peak ground accelerations from the ...
... by the strong earthquake at the Japanese coastline in April 2011 that led to political shut-down of power plants in Germany - located more or less on the other side of the globe. A number of system components of the Fukushima nuclear power plant could not withstand peak ground accelerations from the ...
Large igneous province
A large igneous province (LIP) is an extremely large accumulation of igneous rocks, including liquid rock (intrusive) or volcanic rock formations (extrusive), when hot magma extrudes from inside the Earth and flows out. The source of many or all LIPs is variously attributed to mantle plumes or to processes associated with plate tectonics. Types of LIPs can include large volcanic provinces (LVP), created through flood basalt and large plutonic provinces (LPP). Eleven distinct flood basalt episodes occurred in the past 250 million years, creating volcanic provinces, which coincided with mass extinctions in prehistoric times. Formation depends on a range of factors, such as continental configuration, latitude, volume, rate, duration of eruption, style and setting (continental vs. oceanic), the preexisting climate state, and the biota resilience to change.