Brecciated feldspar porphyry

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August undefined, 2024

WebIn 2001, the company's efforts identified a 40 m wide silicified alteration system exposed in an outcrop of brecciated feldspar porphyry on Wedge cl 12 in the vicinity of a grab sample that had reportedly returned 270 ppb gold. A zone of pyritized phyllic alteration in the porphyry was discovered flanking the zone of silicification. WebQuartz monzonite is an intrusive, felsic, igneous rock that has an approximately equal proportion of orthoclase and plagioclase feldspars.It is typically a light colored phaneritic (coarse-grained) to porphyritic granitic …

Feldspar porphyry: Mineral information, data and localities.

WebDec 30, 2015 · This alteration zone is abruptly truncated to the south by the post-mineralization hornblende feldspar porphyry, although minor alteration also occurs south of this intrusion. ... massive to semi-planar veins that are characterized by re-crystallized to brecciated quartz, subordinate K-feldspar, boxwork after sulfides, and irregular Fe-oxide ... WebMay 8, 2024 · feldspars The most important group of rock-forming silicate minerals, including the alkali feldspars KAlSi 3 O 8 to NaAlSi 3 O 8 (K-feldspar to albite) and the … city sports petaluma ca

Quartz monzonite - Wikipedia

WebJun 2, 2024 · Geologists use the term porphyry only with a word in front of it describing the composition of the groundmass. This image, for instance, shows an andesite porphyry. The fine-grained part is andesite and the … WebFeldspars occur in all classes of rocks. They are widely distributed in igneous rocks, which indicates that they have formed by crystallization from magma. Physical weathering of … WebJan 29, 2024 · feldspar-porphyry were brecciated and cemented by calcite (stage 4B) to form the quartz-rich central facies (QBX-Un, QBX-Act) and the upper contact facies, … city sports petaluma hours

Feldspars - all about the plagioclases and K-feldspars

PorterGeo Database - Ore Deposit Description

WebThe main showing consists of chalcopyrite, bornite and pyrite hosted in altered and brecciated feldspar porphyry in a shear zone closely associated with the main fault. Sphalerite and pyrite occur about 250 metres to the south in a similar setting. Silver was observed in fractures in volcanic rocks on the banks of Sutton Creek. WebMonzonite. Monzonite is an igneous intrusive rock, formed by slow cooling of underground magma that has a moderate silica content and is enriched in alkali metal oxides. Monzonite is composed mostly of plagioclase and … double in backgammonWebMineralized porphyry is located within the core or flank of the stratovolcano edifice. Summit craters and small calderas are present and caldera fill breccia are important host rocks at … city sports petaluma classes

"WebBreccia (/ ˈ b r ɛ tʃ i ə, ˈ b r ɛ ʃ-/) is a rock composed of large angular broken fragments of minerals or rocks cemented together by a fine-grained matrix.. The word has its origins in the Italian language, in which it means … " - Brecciated feldspar porphyry

Brecciated feldspar porphyry

http://www.geologyontario.mndm.gov.on.ca/mndmfiles/afri/data/imaging/42A09SE0248/42A09SE0248.pdf WebApr 1, 2024 · By the end of stage 4, the stage 3 quartz, feldspar, and altered feldspar-porphyry were brecciated and cemented by calcite (stage 4B) to form the quartz-rich central facies (QBX-Un, QBX-Act) and the upper contact facies, QBX-FP, respectively … Journal of Southeast Asian Earth Sciences, Vol. 1, No. I, pp. 3--22, 1986 0743 …

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WebNov 30, 2024 · It has limited outcrops of its brecciated, argillically altered, strong oxide copper mineralized siliciclastic sediments. Strong copper mineralization is found on outcrops and in the drilling. ... target 900m by 600m gold-in-soils anomaly that averaged 0.44gpt covering hydrothermal breccias within a Quartz feldspar porphyry stock intruding ... http://portergeo.com.au/database/mineinfo.asp?mineid=mn593

Weblight blue luster. The feldspars are rather uniformly colored light Indian-red, the larger crystals being mottled with gray. The proportion of phenocrysts and groundmass … WebOct 1, 2024 · 1. Introduction. Exploration for porphyry copper deposits has been guided by hydrothermal alteration patterns, which have been a focus of study for over a century (e.g., Lindgren, 1933, Lowell and Guilbert, 1970, Titley and Beane, 1981).Dismemberment and tilting of many deposits in the Basin and Range extensional province has exposed deep …

WebFeldspars are generally light colored minerals, white or buff to gray in color. One species, microcline, may also be light brick-red or even the green to blue green variety called … WebPorphyry is an igneous rock that contains larger crystals (phenocrysts) in a fine-grained groundmass. K-feldspar phenocrysts in this sample. Width of view 7 cm. TUG 1608-2807. It seems simple enough but unfortunately …

WebAn alkali-feldspar granite porphyry dike crosscuts the granite porphyry in the central- SW area and is equivalent to the andesitic dike described by Williams et al. (999). The dike (sample 34) has ...

WebThree of these zones (#1, #3, and #4) are hosted within altered and brecciated quartz diorite in close proximity to dykes and stocks of quartz-feldspar porphyry, while the … city sports phone numberWebFeb 5, 2014 · Kahang porphyry copper deposit is located in Isfahan Province, in the middle of the Urmia-Dokhtar magmatic belt. This deposit is the first porphyry deposit explored in this part of the belt, and ... double in c inputWebresembling porphyry style D veins. Host rock is intensely clay-pyrite/QSP altered feldspar porphyry. Orange Mountain: Drill hole AM07-01 (179 m) contains newly recognized Red Chris-like banded quartz-magnetite-chalcopyrite stockwork, hosted in a brecciated feldspar porphyry. Metal values up to 0.46% Cu and 0.59 g/t Au were reported from 1.3 to city sports physical therapyWebporphyry and epithermal deposits. The largest and richest gold-bearing, global porphyry systems are related to potassic magmas. About 60% of the gold that is contained in the 25 largest porphyry copper-gold deposits in the world, as ranked by gold content, occurs in nine potassic magma-related deposits (Garwin, 2024). double incumbent or double incumbencyPorphyry is the name given to decorative granites or igneous rocks with coarse-grained crystals such as feldspar or quartz dispersed in a fine-grained silicate-rich, generally aphanitic matrix or groundmass. The larger crystals are called phenocrysts. In its non-geologic, traditional use, the term porphyry usually refers to the purple-red form of this stone, valued for its appearance, but other colou… double incision mastectomy cptWebQuartz porphyry from the island of Alnö, Sweden. Phenocrysts of clear glassy rounded quartz and white orthoclase feldspar are set in a fine-grained matrix. Sample is just over … city sports philadelphiaWebIn any case, feldspar crystals are relatively rare; almost all occur in miarolitic cavities, in pegmatite masses, or as phenocrysts within porphyries. (A porphyry is an igneous rock containing conspicuous crystals, called … city sports on milwaukee