Geology and Mineral Resources of Mesa del Oro Quadrangle
... The quadrangle is on the west flank of the Lucero uplift, a westward dipping monoclinal structure that forms the east boundary of the Acoma embayment of the San Juan Basin. The quadrangle is obliquely transected by Sierra Lucero, a northeastward trending, northwest-dipping expression of the structur ...
... The quadrangle is on the west flank of the Lucero uplift, a westward dipping monoclinal structure that forms the east boundary of the Acoma embayment of the San Juan Basin. The quadrangle is obliquely transected by Sierra Lucero, a northeastward trending, northwest-dipping expression of the structur ...
1.6 General age and tectonic setting of the Arabian Shield
... of exposed crystalline rocks. The crystalline rocks themselves, of course, extend beyond the limits of the shield, down dip beneath the covering sedimentary strata. In comparison to other areas of exposed Precambrian rock on Earth, the Arabian shield is of moderate size, but it is important as one o ...
... of exposed crystalline rocks. The crystalline rocks themselves, of course, extend beyond the limits of the shield, down dip beneath the covering sedimentary strata. In comparison to other areas of exposed Precambrian rock on Earth, the Arabian shield is of moderate size, but it is important as one o ...
Structural Controls on Massive Sulfide Deposition and Hydrothermal
... alteration zones was controlled by the morphology of the structural conduit. In rocks with vertical and/or lateral facies, permeability, and competency changes (e.g., Lyon Lake graben), there was an additional stratigraphic control over fluid migration. Some crosscutting synvolcanic structures, alte ...
... alteration zones was controlled by the morphology of the structural conduit. In rocks with vertical and/or lateral facies, permeability, and competency changes (e.g., Lyon Lake graben), there was an additional stratigraphic control over fluid migration. Some crosscutting synvolcanic structures, alte ...
Lac des Iles-Tib L. area: plutonic rocks
... terms set out on this page (“Terms of Use”). By downloading this Content, you (the “User”) have accepted, and have agreed to be bound by, the Terms of Use. Content: This Content is offered by the Province of Ontario’s Ministry of Northern Development and Mines (MNDM) as a public service, on an “as-i ...
... terms set out on this page (“Terms of Use”). By downloading this Content, you (the “User”) have accepted, and have agreed to be bound by, the Terms of Use. Content: This Content is offered by the Province of Ontario’s Ministry of Northern Development and Mines (MNDM) as a public service, on an “as-i ...
GEOLOGY OF THE BUCHANS–ROBERTS ARM VOLCANIC BELT
... deformed, pyritic chlorite schist and quartz-sericite schist are common. Where altered and mineralized, widespread gossans cap semi-massive, disseminated and stringer sulphide zones developed in mafic and felsic rock types. One of the more distinctive rock units in the Gullbridge tract is represente ...
... deformed, pyritic chlorite schist and quartz-sericite schist are common. Where altered and mineralized, widespread gossans cap semi-massive, disseminated and stringer sulphide zones developed in mafic and felsic rock types. One of the more distinctive rock units in the Gullbridge tract is represente ...
Geology and Mineral Resources of Lake County, Colorado
... pleased to present the Colorado Geological Survey Resource Series 42, Geology and Mineral Resources of Lake County, Colorado. Its purpose is to describe the geological setting and the various mineral deposits of Lake County. The report discusses known preciousand base metal deposits, molybdenum depo ...
... pleased to present the Colorado Geological Survey Resource Series 42, Geology and Mineral Resources of Lake County, Colorado. Its purpose is to describe the geological setting and the various mineral deposits of Lake County. The report discusses known preciousand base metal deposits, molybdenum depo ...
1:100 000 Geological Map Series Explanatory Notes Sheet 5172
... rainforest contains tall trees and thick growth, with the water table close to the surface. ...
... rainforest contains tall trees and thick growth, with the water table close to the surface. ...
Geology of the West-Central Cape Breton
... Between Rocky Brook and Jim Campbell's Brook, a heterogeneous assemblage of relatively coarse grained metasedimentary rocks structurally overlies the Faribault Brook metavolcanics (Fig. 1). Boulder conglomerate outcropping along Rocky Brook and in a small area south of Faribault Brook (Fig. 1) conta ...
... Between Rocky Brook and Jim Campbell's Brook, a heterogeneous assemblage of relatively coarse grained metasedimentary rocks structurally overlies the Faribault Brook metavolcanics (Fig. 1). Boulder conglomerate outcropping along Rocky Brook and in a small area south of Faribault Brook (Fig. 1) conta ...
Paleogene–early Miocene igneous rocks and geodynamics of the
... A review of Paleogene–early Miocene igneous rocks of the Alpine-CarpathianPannonian-Dinaric region is presented in this paper. We attempt to reveal the geodynamic link between Paleogene–early Miocene igneous rocks of the Mid-Hungarian zone and those of the Alps and Dinarides. Our summary suggests th ...
... A review of Paleogene–early Miocene igneous rocks of the Alpine-CarpathianPannonian-Dinaric region is presented in this paper. We attempt to reveal the geodynamic link between Paleogene–early Miocene igneous rocks of the Mid-Hungarian zone and those of the Alps and Dinarides. Our summary suggests th ...
Diversity in Nature
... The geological processes that have formed these deposits in the Nordic countries are closely linked to glacial erosion and the transport of clay, sand, gravel and boulders towards the ice margin. At the same time large rivers have transported material out towards the sea. However there are differenc ...
... The geological processes that have formed these deposits in the Nordic countries are closely linked to glacial erosion and the transport of clay, sand, gravel and boulders towards the ice margin. At the same time large rivers have transported material out towards the sea. However there are differenc ...
Mafic eclogites in the Czech part of the Erzgebirge
... At the locality near Měděnec Village (Fig. 2), we will examine eclogite with a discrete zone that contains atoll garnet formed under eclogite facies conditions. Atoll garnets occur in several localities, but their relations to eclogites lacking atoll garnet are not always clear (Faryad et al., 2010) ...
... At the locality near Měděnec Village (Fig. 2), we will examine eclogite with a discrete zone that contains atoll garnet formed under eclogite facies conditions. Atoll garnets occur in several localities, but their relations to eclogites lacking atoll garnet are not always clear (Faryad et al., 2010) ...
chapter - ii geochemistry of uranium
... oxidizing to U (VI) species, other in-situ remediation approaches are needed. Phosphate addition is a potential strategy for in-situ uranium immobilization for oxidizing conditions. The injection of phosphate-containing compounds may facilitate formation of uranyl phosphate solids; these solids have ...
... oxidizing to U (VI) species, other in-situ remediation approaches are needed. Phosphate addition is a potential strategy for in-situ uranium immobilization for oxidizing conditions. The injection of phosphate-containing compounds may facilitate formation of uranyl phosphate solids; these solids have ...
Geochemical characteristics of the alkaline basalts and the phonolite
... cations were not representing the actual volcanic rocks of the ...
... cations were not representing the actual volcanic rocks of the ...
NORSK GEOLOGISK TIDSSKRIFT 45 DISTRIBUTION PATTERNS
... 3. Any failure of the REE to act coherently may be attributed to: a) differences in ionic radius (the radius decreases from La to Lu), b) differences in basicity (the basicity decreases from La to Lu), or c) ability of a number of REE to exist in an oxidation state other than +3 (i.e. Ce-+4, Sm+2, E ...
... 3. Any failure of the REE to act coherently may be attributed to: a) differences in ionic radius (the radius decreases from La to Lu), b) differences in basicity (the basicity decreases from La to Lu), or c) ability of a number of REE to exist in an oxidation state other than +3 (i.e. Ce-+4, Sm+2, E ...
Stratigraphy and structural geology of the hangingwall to the
... stratigraphic order from oldest to youngest. In these descriptions, a nongenetic terminology for volcaniclastic rocks is used because distinguishing primary and resedimented volcaniclastic deposits in the field is difficult. The deposits are described using the nongenetic, granulometric names tuff, la ...
... stratigraphic order from oldest to youngest. In these descriptions, a nongenetic terminology for volcaniclastic rocks is used because distinguishing primary and resedimented volcaniclastic deposits in the field is difficult. The deposits are described using the nongenetic, granulometric names tuff, la ...
Fluorite (2013) - Department of Natural Resources
... Lord and Lady Gulch, Blue Beach, and Hares Ears veins environments but most commonly occurs as veins (Figure 3). Individual veins range from ~ 0.3 to 7 m in deposited from hydrothermal solutions, and in related width and extend for 1 to 2.5 km. The replacement deposits. Fluorite-bearcontinuity and c ...
... Lord and Lady Gulch, Blue Beach, and Hares Ears veins environments but most commonly occurs as veins (Figure 3). Individual veins range from ~ 0.3 to 7 m in deposited from hydrothermal solutions, and in related width and extend for 1 to 2.5 km. The replacement deposits. Fluorite-bearcontinuity and c ...
New Mexico Geological Society
... marine sea. The Glance Conglomerate is predominantly a coarse fanglomerate and was deposited on alluvial fans in local basins bounded on at least one side by normal faults. This synorogenic, unfossiliferous, nonmarine deposit is related to substantial vertical tectonic movements which preceded moder ...
... marine sea. The Glance Conglomerate is predominantly a coarse fanglomerate and was deposited on alluvial fans in local basins bounded on at least one side by normal faults. This synorogenic, unfossiliferous, nonmarine deposit is related to substantial vertical tectonic movements which preceded moder ...
Geologic Structures
... of minerals (Fig. 1–2). Although more than 3500 different minerals exist, fewer than a dozen are common. Geologists study the origins, properties, and compositions of both rocks and minerals. Geologists also explore the Earth for the resources needed in our technological world: fossil fuels such as ...
... of minerals (Fig. 1–2). Although more than 3500 different minerals exist, fewer than a dozen are common. Geologists study the origins, properties, and compositions of both rocks and minerals. Geologists also explore the Earth for the resources needed in our technological world: fossil fuels such as ...
Alpine Granites
... granite intrusions are represented by the Biella, Bergell, Adamello, Rieserferner, Karawanken and Pohorje plutons. They are plutons of calc-alkaline composition and mainly of I-type origin, i.e. the magma is derived from source rocks of igneous composition (GRATZER ET AL., 1993). Magmatism occurred ...
... granite intrusions are represented by the Biella, Bergell, Adamello, Rieserferner, Karawanken and Pohorje plutons. They are plutons of calc-alkaline composition and mainly of I-type origin, i.e. the magma is derived from source rocks of igneous composition (GRATZER ET AL., 1993). Magmatism occurred ...
Alteration of the oceanic lithosphere and its implications for seafloor
... processes. Serpentinization involves hydration of olivine, the dominant mineral in the oceanic mantle, and typically incorporates >10 weight % H2O into the rocks. Hydration reactions are accompanied by a 20-40% increase in volume, a decrease in bulk density, and changes in mineralogy and rheology th ...
... processes. Serpentinization involves hydration of olivine, the dominant mineral in the oceanic mantle, and typically incorporates >10 weight % H2O into the rocks. Hydration reactions are accompanied by a 20-40% increase in volume, a decrease in bulk density, and changes in mineralogy and rheology th ...
Steady state, erosional continuity, and the topography of landscapes
... resistant bedrock and less steep within more erodible rocks (Hack, 1957; Moglen and Bras, 1995; Pazzaglia et al., 1998; Duvall et al., 2004). However, this result depends on an implicit assumption of vertical contacts between strata as in Fig. 1a. Strictly speaking, topographic equilibrium does not ...
... resistant bedrock and less steep within more erodible rocks (Hack, 1957; Moglen and Bras, 1995; Pazzaglia et al., 1998; Duvall et al., 2004). However, this result depends on an implicit assumption of vertical contacts between strata as in Fig. 1a. Strictly speaking, topographic equilibrium does not ...
Intrusive felsic-mafic net-veined complexes in north
... fine to medium-grained leucogranite and dolerite (Donchak & others, 1979). The granite and dolerite here could be of similar age, although the dolerite is thought to be somewhat younger than the granite; both are Proterozoic. BurstaU Granite and Lunch Creek Gabbro. Con• tacts between these two Prote ...
... fine to medium-grained leucogranite and dolerite (Donchak & others, 1979). The granite and dolerite here could be of similar age, although the dolerite is thought to be somewhat younger than the granite; both are Proterozoic. BurstaU Granite and Lunch Creek Gabbro. Con• tacts between these two Prote ...
NWGS NWCS
... structure of the North Cascades (Fig. 1) was established at this Haugerud and others (1994) summarize evidence and arguments time. Eocene orogeny was almost as profound in its effects • for these opposing views. Thrusting has been interpreted to be as mid-Cretaceous orogeny. a second-order effect of ...
... structure of the North Cascades (Fig. 1) was established at this Haugerud and others (1994) summarize evidence and arguments time. Eocene orogeny was almost as profound in its effects • for these opposing views. Thrusting has been interpreted to be as mid-Cretaceous orogeny. a second-order effect of ...
Geology - Purdue Extension
... leader, had planned. Sometimes youth talk among themselves rather than listening to you; sometimes no one cames to a planned field trip; or sometimes no one speaks up to answer your questions when you are trying to involve the youth in the discussion. If you are working with a broad age range, the a ...
... leader, had planned. Sometimes youth talk among themselves rather than listening to you; sometimes no one cames to a planned field trip; or sometimes no one speaks up to answer your questions when you are trying to involve the youth in the discussion. If you are working with a broad age range, the a ...
Geochronological constraint on the brittle-plastic deformation along the
... areas or that the western side in the northern area had been exhumed from deeper part. K-Ar ages of hornblende and biotite of granitic rocks do not show their intrusion age, and it is difficult to infer which possibilities are reasonable for this different cooling history. In spite of the difference ...
... areas or that the western side in the northern area had been exhumed from deeper part. K-Ar ages of hornblende and biotite of granitic rocks do not show their intrusion age, and it is difficult to infer which possibilities are reasonable for this different cooling history. In spite of the difference ...
Clastic rock
Clastic rocks are composed of fragments, or clasts, of pre-existing minerals and rock. A clast is a fragment of geological detritus, chunks and smaller grains of rock broken off other rocks by physical weathering. Geologists use the term clastic with reference to sedimentary rocks as well as to particles in sediment transport whether in suspension or as bed load, and in sediment deposits.