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Alphabetical Mineral Index - P. Search returned: 2503 items. Only items listed in bold are recognised mineral species. ... Palladian Gold. Palladian Melonite. Palladian Pentlandite. Palladian Platinian Tetra-auicupride. ... Peralkaline granite. Alkali granite. Peralkaline microgranite. Peralkaline phonolite.
Averill, S.A. 2013. Discovery and delineation of the Rainy River gold deposit using glacially dispersed gold grains sampled by deep overburden drilling. In New frontiers for exploration in glaciated terrain. ... Structural and textural evolution of the Strange Lake peralkaline rare-element (NYF) granite pegmatite, Quebec–Labrador.
Syenite is a coarse-grained intrusive igneous rock with a general composition similar to that of granite, but deficient in quartz, which, if present at all, occurs in relatively small concentrations (< 5%).Some syenites contain larger proportions of mafic components and smaller amounts of felsic material than most granites; those are classed as being of intermediate composition.
These A-type suites are metaluminous, but peralkaline and peraluminous A-type granites also occur in Australia and elsewhere. Partial melting of felsic granulite is the preferred genetic model. This source rock is the residue remaining in the lower crust after production of a previous granite.
peralkaline granite, and the tin-tungsten-enriched granites are related to medium-sized plutons of biotite or biotite- muscovite granite. Existing geochemical and geologic data for many parts of the Arabian Shield were compiled as a basis for evaluating the resource potential of the granites of the Shield.
Peralkaline Granite Granite is a medium-tocoarse-grained acid igneous rock with essential quartz (>20%) and feldspar, where alkali feldspar constitutes between 100 and 35% of the feldspars, and minor mafic minerals. Hornblende and biotite are the commonest mafic minerals, however, muscovite is also frequently encountered.
Furthermore, a mantle origin of a granitic magma may have little influence on the magma composition, for it has been argued that rocks as varied as tonalite (Tate et al., 1999), fayalite granite (Frost & Frost, 1997), and peralkaline granite (Barker et al., 1975) are of mantle derivation.
Looking for sentences and phrases with the word granite? Here are some examples. ... all crimson and gold, haloing the bare granite peaks and pine-scattered slopes that trailed down to the desert. ... Rockall is made of a type of peralkaline granite that is relatively rich in sodium and potassium.
At Sams Creek, a peralkaline microgranite dyke intrudes Lower Palaeozoic greenschist facies metasediments. The granitedyke has been extensively silicified and hosts stockwork veins composed of quartz, siderite, and arsenopyrite + pyrite ± gold ± galena ± sphalerite ± chalcopyrite ± pyrrhotite.
American Mineralogist, Volume 76, pages 1279-1290, 1991 Ascent of felsic magmas and formation of rapakivi HaNN.l, Npxvasrr, Department of Earth and Space Sciences, State University of New York, Stony Brook, New York 11794-2100, U.S.A.
Genetically related to the Jurassic, Bokan Mountain peralkaline granite. Alteration of deposit: This prospect and the other uranium, thorium, and REE deposits associated with the Bokan Mountain peralkaline granite are marked by albitization, chloritization, and argillization.
2 generation during alteration of peralkaline granites, we performed hydrothermal experiments on pure arfvedsonite (arfv.) and natural granite (20 wt% arfv.) from Strange Lake. We used gold capsules and a Ti flexible reaction-cell rocking autoclave to investigate the effects of temperature (up to 400°C), chlorinity and pH. Numerous
Rare Metal Deposits Associated with Alkaline/Peralkaline Igneous Rocks ... as gold often does, but instead ... that alkali amphibole mineral separates from two syenite and peralkaline granite ...
A-type granites: characteristics, petrogenesis and their ... Subaluminous to peralkaline, sometimes peraluminous 3. For rocks of intermediate silica content, A-type granitoids generally have ... • Six peralkaline granite massifs, confined to the margins of the Keivy terrane
Mineral systems include porphyry-epithermal, granite-related, iron-oxide copper-gold, mafic-ultramafic orthomagmatic, sub-aqueous volcanic-related, orogenic, basin .
Mahd adh Dhahab is the largest of numerous ancient gold mines scattered through the Precambrian Shield of Saudi Arabia and the only one with recent production. Free gold and silver, tellurides, pyrite, galena, sphalerite, and chalcopyrite are in, and associated with, quartz veins and .
Southeast Cape Breton Island has a cluster of granite-hosted Cu-Pb-Zn-Ag-Au deposits. These deposits are known as the French Road or Oceanview deposits; they have characteristics indicative of the intrusion-related gold deposit type, or more recently named, thermal aureole gold (TAG) deposits.
Granite Gold Quartz Brite® 24-ounce Spray. The third-generation family that makes it easy to protect granite and other natural stone is doing the same for engineered quartz surfaces. Granite Gold Quartz Brite® is a combination cleaner and polish that cleans and polishes quartz surfaces such as Silestone, LG and more to a brilliant shine.
The orogenic gold deposit model and New Zealand: consistencies and anomalies. ... K. 2004. The Sams Creek peralkaline granite hosted gold deposit, northwest ... granite-hosted gold-sulphide ...
At Sams Creek a peralkaline granite porphyry dyke hosts gold-bearing sulfide-quartz-siderite veins. The granite dyke intrudes Ordovician-Silurian metapelite and quartzite, and has thin lamprophyre dykes along its contacts. The mineralised veins and the granite and lamprophyre dykes have been deformed during several phases of folding, the youngest of which is Early Cretaceous. The granite has...
Gold mineralization is hosted by a peralkaline granite dyke which outcrops over about eight kilometers in the area of Sams Creek, a tributary of the Takaka River, north-west Nelson. The granite is riebeckite and acmite bearing, with antiperthitic alkali feldspars; it has A-type chemistry, implying an origin by partial melting at a temperature ...
Hydrothermal Ore Deposits, Rare Metals, Fluid Inclusions, Peralkaline Rocks, Geochemistry. My research is devoted mainly to understanding the formation of hydrothermal ore deposits. In particular, I have investigated rare-metal bearing alkaline rocks, orogenic gold deposits, pegmatites, porphyry deposits, and gems.
In the Precambrian Arabian Shield, granitoid plutonic rocks are widespread and range in age from 800 to 550 Ma old; but the mineral-resource potential associated with these plutonic rocks is restricted mainly to the younger, postorogenic granites. Two granite types of current economic interest are zirconium- niobium-enriched per alkaline granites and tin-tungsten-enriched peraluminous granites.
Esmond Granite - Light-gray to pink biotite granite, generally slightly altered, locally foliated. Gradational with Zgmgd. Intrudes Zsg. Esmond Granite occupies nearly 100 sq km in RI and forms an elongate pluton southeast of Woonsocket, RI, of which only the northern part is .
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