ORIGINAL PAPER
... Analyses 1, 4, 7–9, 11 and 12 are from the literature; the rest were obtained in this study using wavelength-dispersive spectrometry with a Cameca SX 100 automated electron microprobe operated at 15 kV and 10 nA with a 10 μm beam; typical detection limits are 300–400 ppm for Mg, 200–300 ppm for Ca, ...
... Analyses 1, 4, 7–9, 11 and 12 are from the literature; the rest were obtained in this study using wavelength-dispersive spectrometry with a Cameca SX 100 automated electron microprobe operated at 15 kV and 10 nA with a 10 μm beam; typical detection limits are 300–400 ppm for Mg, 200–300 ppm for Ca, ...
whitefish
... “Sudbury breccias” are a group of unusual clast–matrix rock bodies in a wide range of rock types in the Huronian Supergroup of the Southern Province and the Superior Province of the Sudbury region. They are best developed around the Sudbury Igneous Complex (SIC) and decrease in abundance away from t ...
... “Sudbury breccias” are a group of unusual clast–matrix rock bodies in a wide range of rock types in the Huronian Supergroup of the Southern Province and the Superior Province of the Sudbury region. They are best developed around the Sudbury Igneous Complex (SIC) and decrease in abundance away from t ...
Berg Porphyry Copper
... Berg copper-molybdenum deposit is in mountainous terrain of the Tahtsa Ranges in westcentral British Columbia.Of the major porphyry copper-molybdenum prospects discovered in the Canadian Cordillera (see SutherlandBrown, 1976) it is the one that possiblymostcloselyresembles the idealized porphyry cop ...
... Berg copper-molybdenum deposit is in mountainous terrain of the Tahtsa Ranges in westcentral British Columbia.Of the major porphyry copper-molybdenum prospects discovered in the Canadian Cordillera (see SutherlandBrown, 1976) it is the one that possiblymostcloselyresembles the idealized porphyry cop ...
CELSIAN, (Ba,K)-FELDSPAR AND CYMRITE FROM
... of folding of Hercynian age and a low to very low grade of regional dynamic metamorphism. The first phase (D1) gave rise to megascopic folds and generated the regional cleavage seen in all region. The second phase (D2) formed subhorizontal ductile shear-zones and overthrusts, and the third phase (D3 ...
... of folding of Hercynian age and a low to very low grade of regional dynamic metamorphism. The first phase (D1) gave rise to megascopic folds and generated the regional cleavage seen in all region. The second phase (D2) formed subhorizontal ductile shear-zones and overthrusts, and the third phase (D3 ...
Petrology, Petrophysics and Fracture Mineralogy of the Drill Core Sample OL-KR8
... contain in addition to dark mica and hornblende also some pyroxene or olivine. Migmatitic gneisses have been defined as migmatites including more than 10% neosome. Ideal veined gneisses contain elongated leucosome veins the thicknesses of which vary typically from several millimetres to five – ten c ...
... contain in addition to dark mica and hornblende also some pyroxene or olivine. Migmatitic gneisses have been defined as migmatites including more than 10% neosome. Ideal veined gneisses contain elongated leucosome veins the thicknesses of which vary typically from several millimetres to five – ten c ...
Magmatic Apatite: A Powerful, Yet Deceptive
... The composition of apatite is determined using a variety of techniques with electron probe microanalysis (EPMA) being the most common. Analysis by EPMA was considered reliable until Stormer et al. (1993) made a troubling observation: the measured X-ray flux from apatite is affected by crystal orient ...
... The composition of apatite is determined using a variety of techniques with electron probe microanalysis (EPMA) being the most common. Analysis by EPMA was considered reliable until Stormer et al. (1993) made a troubling observation: the measured X-ray flux from apatite is affected by crystal orient ...
Geology of Paleoproterozoic Gneiss- and Granitoid
... (2) magmatic arc-hosted, consisting of mesozonal quartz-pyrite-carbonate veins and disseminations hosted in ductile-brittle structures cutting the gneisses of the Cuiú-Cuiú Complex and the granitoids of the Tropas Suite. Intrusion-related deposits have been subdivided into: (1) epizonal quartzpyrite ...
... (2) magmatic arc-hosted, consisting of mesozonal quartz-pyrite-carbonate veins and disseminations hosted in ductile-brittle structures cutting the gneisses of the Cuiú-Cuiú Complex and the granitoids of the Tropas Suite. Intrusion-related deposits have been subdivided into: (1) epizonal quartzpyrite ...
Abstracts volume - Ústav petrologie a strukturní geologie
... deformation driven by a far field stress may trigger mineral reactions. On the other hand, stress heterogeneity and local deformation may be internally produced through volume changes associated with phase transformation and mineral reactions. An example for deformation induced mineral reactions wil ...
... deformation driven by a far field stress may trigger mineral reactions. On the other hand, stress heterogeneity and local deformation may be internally produced through volume changes associated with phase transformation and mineral reactions. An example for deformation induced mineral reactions wil ...
Mineral exploration Lewisian supracrustal and basic rocks of the
... The Lewisian Complex of north-west Scotland forms part of an extensive Archaean to earlyProterozoic terrain which extends from the Churchill Province in Labrador via the Nagssugtoqidian belt of Greenland to the Karelian belt of Finland. The complex comprises a series of metamorphic tracts or belts, ...
... The Lewisian Complex of north-west Scotland forms part of an extensive Archaean to earlyProterozoic terrain which extends from the Churchill Province in Labrador via the Nagssugtoqidian belt of Greenland to the Karelian belt of Finland. The complex comprises a series of metamorphic tracts or belts, ...
Chapter 7
... 3.11). The local melt concentrations in the olivine-orthopyroxene material, sample 5249, tended to contain more melt than those in the olivine material, sample 5072 and a larger fraction of the total melt content in sample 5249 was contained in the larger melt bodies (fig 3.7). In addition to the in ...
... 3.11). The local melt concentrations in the olivine-orthopyroxene material, sample 5249, tended to contain more melt than those in the olivine material, sample 5072 and a larger fraction of the total melt content in sample 5249 was contained in the larger melt bodies (fig 3.7). In addition to the in ...
ENGINEERING GEOLOGICAL PRACTICE IN HONG KONG
... depiction of rock percentage and correlation with rock core recovery (assuming recovery of 100% of the rock material). Very idealised jointing patterns and equi dimensional blocks are shown. The percentage of rock in the ground in proportion to the percentage of rock core recovered will be larger w ...
... depiction of rock percentage and correlation with rock core recovery (assuming recovery of 100% of the rock material). Very idealised jointing patterns and equi dimensional blocks are shown. The percentage of rock in the ground in proportion to the percentage of rock core recovered will be larger w ...
Test - Weebly
... 3. What kind of twinning does this mineral possess most commonly? a. Carlsbad b. Manebach c. Baveno 4. In Ancient Greek, the name of this mineral translates to what? ______________________________ 5. This mineral is most commonly found as a constituent in what kinds of rocks? a. Sedimentary b. High- ...
... 3. What kind of twinning does this mineral possess most commonly? a. Carlsbad b. Manebach c. Baveno 4. In Ancient Greek, the name of this mineral translates to what? ______________________________ 5. This mineral is most commonly found as a constituent in what kinds of rocks? a. Sedimentary b. High- ...
Bulletin 26: Geology of the Gran Quivira Quadrangle, New Mexico
... their southern end, in the Gran Quivira quadrangle, these mountains are only 11/2 miles in width. The surface is rough, the drainage is by intermittent streams in deep canyons, and the vegetation cover is scant. The mountains are bounded on the southeast by a deep straight canyon with a high ridge o ...
... their southern end, in the Gran Quivira quadrangle, these mountains are only 11/2 miles in width. The surface is rough, the drainage is by intermittent streams in deep canyons, and the vegetation cover is scant. The mountains are bounded on the southeast by a deep straight canyon with a high ridge o ...
Nickel Copper Chromite Cobalt Deposits Werner Rex Bug Lakes
... Parts of this publication may be quoted if credit is given. It is recommended that reference to this publication be made in the following form: Parker, J.R. 1998. Geology of nickel-copper-chromite deposits and cobalt-copper deposits at Werner–Rex–Bug Lakes, English River Subprovince, Northwestern On ...
... Parts of this publication may be quoted if credit is given. It is recommended that reference to this publication be made in the following form: Parker, J.R. 1998. Geology of nickel-copper-chromite deposits and cobalt-copper deposits at Werner–Rex–Bug Lakes, English River Subprovince, Northwestern On ...
Porphyry Cu mineralization related to the small Tertiary volcanic
... metamorphic age. From the aspect of mineralization, they represent an unfavourable environment, compared with the gneisses, being poorly permeable for hydrothermal solutions. Amphibolites occur in the crystalline schists in the form of lenses or strata and larger irregular masses. Generally, they ...
... metamorphic age. From the aspect of mineralization, they represent an unfavourable environment, compared with the gneisses, being poorly permeable for hydrothermal solutions. Amphibolites occur in the crystalline schists in the form of lenses or strata and larger irregular masses. Generally, they ...
Sea¯oor hydrothermal alteration at an Archaean mid
... and epidote/clinozoisite is extremely rare. Instead, abundant carbonates are present with chlorite suggesting high-XCO2 composition in the ¯uid. On the other hand, in Zones B and C metabasites, where Ca-amphibole+epidote/clinozoisite+chlorite+Ca-Na plagioclase are the dominant assemblages, carbonate ...
... and epidote/clinozoisite is extremely rare. Instead, abundant carbonates are present with chlorite suggesting high-XCO2 composition in the ¯uid. On the other hand, in Zones B and C metabasites, where Ca-amphibole+epidote/clinozoisite+chlorite+Ca-Na plagioclase are the dominant assemblages, carbonate ...
chloritization and associated alteration at the jabiluka
... The extensive chlorite-dominated zone of alteration that encloses the ore at the world-class Jabiluka uranium deposit, Northern Territory, Australia, is characteristic of unconformity-type deposits in Australia. These unconformity-type deposits, as well as similar deposits in Canada, were first disc ...
... The extensive chlorite-dominated zone of alteration that encloses the ore at the world-class Jabiluka uranium deposit, Northern Territory, Australia, is characteristic of unconformity-type deposits in Australia. These unconformity-type deposits, as well as similar deposits in Canada, were first disc ...
- Beryllium Science and Technology Association
... 8. Photographs of (A) Nodule from Roadside pit with an interior of quartz, opal, and fluorite and an outer zone of opal and fluorite that contains as much as 1-percent beryllium as bertrandite. (B) Nodule from Roadside pit with an interior of graybrown calcite, an intermediate zone of black chalcedo ...
... 8. Photographs of (A) Nodule from Roadside pit with an interior of quartz, opal, and fluorite and an outer zone of opal and fluorite that contains as much as 1-percent beryllium as bertrandite. (B) Nodule from Roadside pit with an interior of graybrown calcite, an intermediate zone of black chalcedo ...
Origin of myrmekite as it relates to K-, Na-, and Ca
... magmatic processes. The lack of proof is partly because chemical studies on granitic rocks formed by metasomatic processes in a replacement sequence of diorite to granodiorite and then to granite give the same chemical trends as those by magmatic differentiation (Collins 1988a). Thus, using experime ...
... magmatic processes. The lack of proof is partly because chemical studies on granitic rocks formed by metasomatic processes in a replacement sequence of diorite to granodiorite and then to granite give the same chemical trends as those by magmatic differentiation (Collins 1988a). Thus, using experime ...
Petrogenetic evolution of Uralian-Alaskan-type mafic
... Joachim Krause, Gerhard E. Brügmann and Evgeny V. Pushkarev ...
... Joachim Krause, Gerhard E. Brügmann and Evgeny V. Pushkarev ...
Document
... and Switzerland) consider crystalline rocks as hosts for radioactive and industrial waste. Most disposal concepts take advantage of the barrier function of the host rock for flow and transport. The potential of a fractured rock system to retard contaminant migration is greatly increased if the rock ...
... and Switzerland) consider crystalline rocks as hosts for radioactive and industrial waste. Most disposal concepts take advantage of the barrier function of the host rock for flow and transport. The potential of a fractured rock system to retard contaminant migration is greatly increased if the rock ...
Characterization of granite matrix porosity and pore‐space geometry
... and Switzerland) consider crystalline rocks as hosts for radioactive and industrial waste. Most disposal concepts take advantage of the barrier function of the host rock for flow and transport. The potential of a fractured rock system to retard contaminant migration is greatly increased if the rock ...
... and Switzerland) consider crystalline rocks as hosts for radioactive and industrial waste. Most disposal concepts take advantage of the barrier function of the host rock for flow and transport. The potential of a fractured rock system to retard contaminant migration is greatly increased if the rock ...
La Caridad Porphyry Cu-Mo Deposit: A Complete Hydrothermal
... Plutonic and volcanic rocks compose the mineralized rock suite of La Caridad porphyry copper deposit. Approximately 90 percent of the mineralization is contained in the quartz monzonite porphyry and hydrothermal breccia. Other igneous and volcanic rocks associated with the deposit are andesites, dio ...
... Plutonic and volcanic rocks compose the mineralized rock suite of La Caridad porphyry copper deposit. Approximately 90 percent of the mineralization is contained in the quartz monzonite porphyry and hydrothermal breccia. Other igneous and volcanic rocks associated with the deposit are andesites, dio ...
P metamorphic history and emplacement in a convergent margin setting
... compositions are sharp, and, on the basis of igneous textures preserved in low-strain domains, are inferred to be igneous. In gabbroic rocks, igneous clinopyroxene occurs as euhedral grains 3–10 mm in length. Igneous orthopyroxene is finer-grained, grains being 1–3 mm in length, and commonly occurs ...
... compositions are sharp, and, on the basis of igneous textures preserved in low-strain domains, are inferred to be igneous. In gabbroic rocks, igneous clinopyroxene occurs as euhedral grains 3–10 mm in length. Igneous orthopyroxene is finer-grained, grains being 1–3 mm in length, and commonly occurs ...
Minerali Bosne i Hercegovine
... original text and only minor modifications have been made in cases where clarity or modern usage required this. The order in which the minerals are described follows the classic crystallochemical approach by Hugo Strunz (1966) and the formulae have also been written following his system. Even the on ...
... original text and only minor modifications have been made in cases where clarity or modern usage required this. The order in which the minerals are described follows the classic crystallochemical approach by Hugo Strunz (1966) and the formulae have also been written following his system. Even the on ...
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.