Geology of Teslin-Quiet Lake Area, Yukon
... According to current usage southern Yukon is divided into three major physiographic provinces, Coast range, Yukon plateau, and Mackenzie mountains. Teslin-Quiet Lake area lies within the Yukon plateau, which in the vicinity of this area is broken by higher mountains that rise above its upland surfac ...
... According to current usage southern Yukon is divided into three major physiographic provinces, Coast range, Yukon plateau, and Mackenzie mountains. Teslin-Quiet Lake area lies within the Yukon plateau, which in the vicinity of this area is broken by higher mountains that rise above its upland surfac ...
Geology and petrology of the felsic intrusions in the
... Promotor: Prof. Dr. J. De Grave Co-promotor: Prof. Dr. L. Tack Leescommissie: Prof. Dr. P. Van den haute, Prof. Dr. M. Fernandez-Alonso ...
... Promotor: Prof. Dr. J. De Grave Co-promotor: Prof. Dr. L. Tack Leescommissie: Prof. Dr. P. Van den haute, Prof. Dr. M. Fernandez-Alonso ...
Holocene yardangs in volcanic terrains in the southern Andes
... that a similar vegetational cover prevailed during Holocene times. The major physiographic changes in the Payun plateau in Holocene times were the volcanic eruptions of cinder cones and lava flows. Yardang troughs are observed in two areas: east and west of the main Payun Matru volcano. The western ...
... that a similar vegetational cover prevailed during Holocene times. The major physiographic changes in the Payun plateau in Holocene times were the volcanic eruptions of cinder cones and lava flows. Yardang troughs are observed in two areas: east and west of the main Payun Matru volcano. The western ...
Magma genesis, plate tectonics, and chemical
... also provide clues about the nature of the source material at (volume 25, numbers 2, 3, 5, and 6, 1987). Volcanoes have played a significant role in the development depth. The theme common to the different parts of this review of geology sinceAbraham Werner at the beginning of the last relates to th ...
... also provide clues about the nature of the source material at (volume 25, numbers 2, 3, 5, and 6, 1987). Volcanoes have played a significant role in the development depth. The theme common to the different parts of this review of geology sinceAbraham Werner at the beginning of the last relates to th ...
Metamorphic Intro
... An assemblage of coexisting phases (thermodynamic equilibrium and the phase rule) • A basaltic composition can be either: – Melt – Cpx + plag ( olivine, ilmenite…) – Or any combination of melt + minerals along the liquid line of descent – If uplifted and eroded surface, will weather a combina ...
... An assemblage of coexisting phases (thermodynamic equilibrium and the phase rule) • A basaltic composition can be either: – Melt – Cpx + plag ( olivine, ilmenite…) – Or any combination of melt + minerals along the liquid line of descent – If uplifted and eroded surface, will weather a combina ...
capturing key attributes of fine-grained sedimentary rocks in
... Shale, for example, has been widely used as a class name for all fine-grained sedimentary rocks. It has also been used as a field term for any fissile fine-grained sedimentary rock. Fissility, in some instances, is incorrectly used interchangeably with lamination. Fissility, however, is a byproduct ...
... Shale, for example, has been widely used as a class name for all fine-grained sedimentary rocks. It has also been used as a field term for any fissile fine-grained sedimentary rock. Fissility, in some instances, is incorrectly used interchangeably with lamination. Fissility, however, is a byproduct ...
Ni – Nickel
... table, along with Pd and Pt. The element has an atomic number of 28, an atomic mass of 59, two main oxidation states (+2 and +3) and five naturally occurring isotopes (58Ni, 60Ni, 61Ni, 62Ni and 64Ni), of which 58Ni is the most abundant at 68.3% of the total mass. Nickel is a siderophile metallic el ...
... table, along with Pd and Pt. The element has an atomic number of 28, an atomic mass of 59, two main oxidation states (+2 and +3) and five naturally occurring isotopes (58Ni, 60Ni, 61Ni, 62Ni and 64Ni), of which 58Ni is the most abundant at 68.3% of the total mass. Nickel is a siderophile metallic el ...
34 - School of Ocean and Earth Science and Technology
... Oceanic crust is dense enough that it can be recycled back into the mantle by subduction. In contrast, continental crust strongly resists subduction. This is why the continents contain rocks dating back billions of years, whereas the oldest crust in the ocean basins is only about 180 Ma. ...
... Oceanic crust is dense enough that it can be recycled back into the mantle by subduction. In contrast, continental crust strongly resists subduction. This is why the continents contain rocks dating back billions of years, whereas the oldest crust in the ocean basins is only about 180 Ma. ...
Minerals 101 Program Script - South Florida Science Center and
... made out of matter that used to be alive. An alive insect is organic. A dead, squished insect is still organic. The loaf of bread in your kitchen may not seem very alive. It doesn’t get up and walk around your kitchen, but bread is organic because it is made out of wheat, which is a plant. Almost al ...
... made out of matter that used to be alive. An alive insect is organic. A dead, squished insect is still organic. The loaf of bread in your kitchen may not seem very alive. It doesn’t get up and walk around your kitchen, but bread is organic because it is made out of wheat, which is a plant. Almost al ...
Clay Minerals
... saponite and palygorskite (trioctahedral). Most smectite group minerals (especially montmorillonites) form by weathering or hydrothermal alteration of volcanic ash or mafic to intermediate volcanic rocks (even on the sea floor). They are used in drilling muds (bentonite), construction, and in fe ...
... saponite and palygorskite (trioctahedral). Most smectite group minerals (especially montmorillonites) form by weathering or hydrothermal alteration of volcanic ash or mafic to intermediate volcanic rocks (even on the sea floor). They are used in drilling muds (bentonite), construction, and in fe ...
The need to explore for rare earth minerals
... bastnaesite (Ce,La) (CO3) (OH,F); xenotime (YPO4) and monazite (Ce,La,Nd, Th)PO4 are the three most economically significant REE minerals. Eudialyte Na(Ca,La)2(Fe,Mn,Y)ZrSi8 O22 (OH,Cl)2; loparite (La,Na,Ca)(Ti,Nb)O3 and allanite (Ce,Ca,Y)2(Al,Fe3+)3(SiO4)3(OH) are less important REE minerals. REEca ...
... bastnaesite (Ce,La) (CO3) (OH,F); xenotime (YPO4) and monazite (Ce,La,Nd, Th)PO4 are the three most economically significant REE minerals. Eudialyte Na(Ca,La)2(Fe,Mn,Y)ZrSi8 O22 (OH,Cl)2; loparite (La,Na,Ca)(Ti,Nb)O3 and allanite (Ce,Ca,Y)2(Al,Fe3+)3(SiO4)3(OH) are less important REE minerals. REEca ...
BW02 - Ispra
... sharply defined, amoeboid patches which occupy from 30% to 50% by volume of the rock. The melilitite fragments often display ‘cauli≠flower’ shapes and appear to be in the process of disintegration. The matrix to the melilitite fragments consists dominantly ...
... sharply defined, amoeboid patches which occupy from 30% to 50% by volume of the rock. The melilitite fragments often display ‘cauli≠flower’ shapes and appear to be in the process of disintegration. The matrix to the melilitite fragments consists dominantly ...
GEOTHERMAL SYSTEMS IN GLOBAL PERSPECTIVE
... FIGURE 1: Reykjavík and Akureyri, Iceland. Bold lines show actual reservoir temperature, 130-140°C for Reykjavík, 90-95°C for Akureyri. Water transports heat from deep levels, thus cooling the rock (heat mining). Shallower levels consequently are heated up 1.3 Off-flow from volcanic (high-temperatur ...
... FIGURE 1: Reykjavík and Akureyri, Iceland. Bold lines show actual reservoir temperature, 130-140°C for Reykjavík, 90-95°C for Akureyri. Water transports heat from deep levels, thus cooling the rock (heat mining). Shallower levels consequently are heated up 1.3 Off-flow from volcanic (high-temperatur ...
S013 - Rocks and minerals of Ontario
... government policy. You are solely responsible for your use of the Content. You should not rely on the Content for legal advice nor as authoritative in your particular circumstances. Users should verify the accuracy and applicability of any Content before acting on it. MNDM does not guarantee, or mak ...
... government policy. You are solely responsible for your use of the Content. You should not rely on the Content for legal advice nor as authoritative in your particular circumstances. Users should verify the accuracy and applicability of any Content before acting on it. MNDM does not guarantee, or mak ...
Near-Ultrahigh Pressure Processing of Continental Crust: Miocene
... mineral compositions suggest derivation of the xenoliths from subducted basaltic, tonalitic and pelitic crust that experienced highpressure dehydration melting, K-rich metasomatism, and solid-state re-equilibration. The timing of these processes is constrained by zircon ages from the xenoliths and 4 ...
... mineral compositions suggest derivation of the xenoliths from subducted basaltic, tonalitic and pelitic crust that experienced highpressure dehydration melting, K-rich metasomatism, and solid-state re-equilibration. The timing of these processes is constrained by zircon ages from the xenoliths and 4 ...
1 THE DIGITAL GEOLOGICAL MAP OF KOSOVO AT A SCALE 1
... Triassic (T1), for Berriasian (Kbe), for Palaeogene (E) and Neogene (N). Latin capitals in italics and size 2 (medium) denote local notes in the sense of facies, rock formations, lithostratigraphic and tectonic or even metamorphic units (e.g. CVT – Vardar Lower Cretaceous flysch trough). For a serie ...
... Triassic (T1), for Berriasian (Kbe), for Palaeogene (E) and Neogene (N). Latin capitals in italics and size 2 (medium) denote local notes in the sense of facies, rock formations, lithostratigraphic and tectonic or even metamorphic units (e.g. CVT – Vardar Lower Cretaceous flysch trough). For a serie ...
Muscovite
... Distortion in muscovite Because the aluminum atoms in the octhedral sites have a high charge of 3+, they tend to repel each other. In order to shield the aluminum atoms from each other, apical oxygen atoms of the tetrahedral sheets above and below the octahedral chains will change their positions. ...
... Distortion in muscovite Because the aluminum atoms in the octhedral sites have a high charge of 3+, they tend to repel each other. In order to shield the aluminum atoms from each other, apical oxygen atoms of the tetrahedral sheets above and below the octahedral chains will change their positions. ...
IQuaME 2500 - Semantic Transformation
... To be able to provide a semantically homogenous geologic map we all need “to speak in one language” – in other words, we need a common vocabulary and a suitable destination data model. It is an advantage for us, that we can build up the semantic transformation on the EU INSPIRE ...
... To be able to provide a semantically homogenous geologic map we all need “to speak in one language” – in other words, we need a common vocabulary and a suitable destination data model. It is an advantage for us, that we can build up the semantic transformation on the EU INSPIRE ...
The origin and evolution of the Earth`s continental crust
... The continental crust constitutes only 0.40 per cent of the mass of the Earth. Although it might seem so small that it could be ignored to a first approximation, the crust contains over 30 per cent of the bulk Earth budget for several of the most incompatible elements, such as Cs, Rb, K, U, Th and L ...
... The continental crust constitutes only 0.40 per cent of the mass of the Earth. Although it might seem so small that it could be ignored to a first approximation, the crust contains over 30 per cent of the bulk Earth budget for several of the most incompatible elements, such as Cs, Rb, K, U, Th and L ...
Characterization and petrologic interpretation of olivine‐rich basalts
... rock outcroppings were observed in the crater walls. Rocks are generally angular and fragmented, but no re-cemented breccias have been recognized. Three rocks (Adirondack, Humphrey, and Mazatzal) were imaged and analyzed as-is (i.e., the natural, dust-covered surface), after brushing with the Rock A ...
... rock outcroppings were observed in the crater walls. Rocks are generally angular and fragmented, but no re-cemented breccias have been recognized. Three rocks (Adirondack, Humphrey, and Mazatzal) were imaged and analyzed as-is (i.e., the natural, dust-covered surface), after brushing with the Rock A ...
Grand Canyon 5 Limestone
... weathering of rocks such as granite. As mountains of granite decompose, calcium ions are released and carried to the ocean by rivers and streams. Precipitation of calcium carbonate may occur by chemical or organic means. (Limestone created: Chem Weathering or Biological ways.) Many marine plants and ...
... weathering of rocks such as granite. As mountains of granite decompose, calcium ions are released and carried to the ocean by rivers and streams. Precipitation of calcium carbonate may occur by chemical or organic means. (Limestone created: Chem Weathering or Biological ways.) Many marine plants and ...
SHEAR GEOLOGY
... composed of rocks that are more highly strained than rocks adjacent to the zone. • may form zones of much more intense foliation, deformation, and folding. • host ore deposits as they are a focus for hydrothermal flow through orogenic belts. • often show some form of retrograde metamorphism from a p ...
... composed of rocks that are more highly strained than rocks adjacent to the zone. • may form zones of much more intense foliation, deformation, and folding. • host ore deposits as they are a focus for hydrothermal flow through orogenic belts. • often show some form of retrograde metamorphism from a p ...
Igneous rock
Igneous rock (derived from the Latin word ignis meaning fire) is one of the three main rock types, the others being sedimentary and metamorphic. Igneous rock is formed through the cooling and solidification of magma or lava. Igneous rock may form with or without crystallization, either below the surface as intrusive (plutonic) rocks or on the surface as extrusive (volcanic) rocks. This magma can be derived from partial melts of pre-existing rocks in either a planet's mantle or crust. Typically, the melting is caused by one or more of three processes: an increase in temperature, a decrease in pressure, or a change in composition. Over 700 types of igneous rocks have been described, most of them having formed beneath the surface of Earth's crust.