Porphyry cooling rate

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August undefined, 2024

WebDiscovery of a large porphyry-style system at Bottletree, page-2. Discovery of a large porphyry-style system at Bottletree, ... gold. i'm not sure what a lot holders expected. it was never going to re-rate to 20 or 50c. there was just a lot of users putting a lot of mayo in these last couple of months ... my god you all have drunk the cool aid ... WebApr 15, 2024 · Porphyry Cu deposits (PCDs) are presently the main source of Cu (~75%) and a substantial source of Au (~20%) around the world [].The ore bodies of PCDs predominantly occur at shallow crustal level around dike-like porphyries, e.g., [2,3].It is well known that PCDs are usually associated with oxidized and volatile-rich magmas within shallow …

How to make porphyry copper deposits - Ming Tang Peking …

WebNov 15, 2012 · Porphyry-type ore deposits are among the world’s premier metal resources, supplying most of the copper, molybdenum, and a substantial part of gold production ().They form in response to focused expulsion of metal-bearing saline fluids from large chambers of cooling hydrous magma ().A restricted zone of ore-mineral precipitation within a more … WebMar 8, 2024 · The rapid cooling of the surrounding granodiorite occurred between 82 and 72 Ma, with the exhumation depth of 2.33–3.11 km and the exhumation rate of 0.25 mm/a, … simplify 12 16

Ann: Discovery of a large porphyry-style system at Bottletree, page-2

WebNov 1, 2024 · Porphyry copper deposit genesis is commonly attributed to degassing of pluton-forming intermediate to silicic magma chambers during slow cooling and … Web2 days ago · Key Points. The consumer price index rose 0.1% in March and 5% from a year ago, below estimates. Excluding food and energy, the core CPI accelerated 0.4% and 5.6%, … Web1 day ago · Homebuyers are embracing mortgage rates dipping closer and closer to 6%. Rates fell for the fifth week in a row as inflation continues to ease. The 30-year fixed-rate … simplify 12 : 16

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Reading: How Are Igneous Rocks Classified? Geology - Lumen …

WebThe term porphyry has a genetic connotation in that it is restricted to hypabyssal rocks: feldspar porphyry is contrasted with its plutonic and volcanic equivalents, porphyritic … WebThe rate of cooling of the magma is rapid, and crystal growth is inhibited. Volcanic rocks are characteristically fine-grained. Volcanic rocks often exhibit structures caused by their eruption, e.g. flow banding (formed by … simplify 12 2+15116−−√WebOct 1, 2014 · PDF The Dexing porphyry copper and Yinshan polymetallic deposits in Dexing City, southeastern China are both giant porphyry ore systems. ... cooling rate s of 10 … simplify 1/2 128-84 - 1/2 128-84

"Web2.2 Porphyry-epithermal mineral system; 2.3 Granite-related ... Nb, Li, Be and related elements. The cooling and crystallisation of these peralkaline granites may also result in the formation of pegmatites which are valued ... Crystal growth rates in pegmatite must be incredibly fast to allow gigantic crystals to grow within the confines and ... " - Porphyry cooling rate

Porphyry cooling rate

What is a Porphyritic Texture and How Is It Formed?

WebPorphyry The larger crystals in porphyry are referred to as phenocrysts, and they form during a period of slower cooling before the rest of the magma solidifies. The surrounding rock (the matrix) cooled more rapidly which resulted in an aphanitic texture, meaning the crystals are not visible to the naked eye. WebPORPHYRITIC GRANITE . Porphyritic granite has the same chemistry & mineralogy as ordinary granite, but differs in the size range of its crystals. Granites are coarsely crystalline igneous rocks, having a phaneritic texture. Porphyritic granites have a mix of large & small crystals, but all crystals are still fairly decent-sized.

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Web“This province extends for at least 65km, includes at least five known or suspected additional porphyry prospects and is 100 per cent owned by the company.” He said drilling had discovered extensive copper mineralisation at Bottletree. Extensive copper-in-soils over a 2km x 1.5km area was centred over severl porphyry targets. WebMar 5, 2024 · Zones of high-temperature alteration commonly show moderate- and low-temperature alteration, with crosscutting relationships indicative of cooling. The roofs of both southwest porphyry and Questa granite porphyry often have quenched margin contacts, with groundmass becoming continuously coarser over ∼1.5–7.5 m below the …

http://itc.gsw.edu/faculty/tweiland/igrx.htm WebThe cooling rate at this shallow depth was faster and the groundmass of the rock is composed of small crystals of minerals that have a lower cooling temperature. Much …

WebHigher cooling rates between 78 and 55 Ma are associated with thermal subsidence during the postrift stage of the Salta rift and/or shortening-related flexural ... Ore-hosting Kuh Panj porphyry intrusions exhibit high Sr (>400 ppm), low Y (<12 ppm) contents, significant REE fractionation (La/Yb >20), no negative Eu anomalies ...

WebJun 1, 2024 · This cooling rate is consistent with the thermal history modelling of two samples which revealed a final rapid cooling commencing at ~4 Ma with a cooling rate of ca. 15–20 °C/m.y. or ca. 500–700 m/m.y. assuming the geothermal gradient of 30 °C/km (Fig ... Cooling and exhumation of porphyry copper deposits in the Gangdese belt.

WebAug 14, 2014 · The Dexing porphyry copper and Yinshan polymetallic deposits in Dexing City, southeastern China are both giant porphyry ore systems ... the cooling rates of … simplify 12/15 answerWebMay 16, 2016 · A Copper Flotation Flowsheet. Because the copper in this type of ore usually assays only plus or minus 1% copper, the porphyry copper operations must be relatively large in order to be commercial. The flowsheet in this study illustrates a typical 3,000 ton per day operation. In general most operations of this type have two or more parallel ... simplify 12 15WebHere is the game plan investors should follow if the Fed hikes interest rates for the last time in May. Traders work on the floor of the New York Stock Exchange shortly after the … simplify 12/150WebApr 13, 2024 · 13 Apr 2024 09:42AM (Updated: 13 Apr 2024 01:15PM) SINGAPORE : The dollar remained subdued in Asian trade on Thursday after weakening overnight as cooler-than-anticipated U.S. inflation data ... simplify 12/16 to lowest termsWeb2 days ago · US March CPI comes in on the cool side. People pump gas at a Sunoco gas station after the inflation rate hit a 40-year high in January, in Philadelphia, Pennsylvania, U.S. February 19, 2024 ... simplify 12/16 answerWebThe idea that the grain size of an igneous rock is inversely related to its cooling rate is described by Wambler and Wallace 14 in the Journal of Geoscience ... rock were responsible for many of the great mineral deposits in the world. 22 These include igneous iron deposits and porphyry and hydrothermal deposits of copper, silver, lead ... raymond pfpWebIgneous rocks form from the cooling of magma – molten materials in the earth’s crust. The terminology Igneous means fire or heat. In this sense, igneous rocks are formed when molten rock (magma) solidifies either underneath the earth’s crust to form plutonic (intrusive) igneous rocks or on the surface of the earth to form volcanic (extrusive) … simplify 12/16