(PDF) The formation of auriferous quartz-sulfide veins in the …

The formation of auriferous quartz-sulfide veins in the Pataz region, northern Peru: A synthesis of geological, mineralogical, and geochemical data ... 600 km southeast of Lima in the Cordillera Occidental of Arequipa Province, southern Peru. The vein mineralization is found in Early to Middle Miocene calc-alkaline lava flows and volcanic ...

(PDF) Tracking fluid mixing in epithermal deposits

Quartz from Cerro de Pasco display similar chemical composition than quartz from epithermal deposits and from late low-temperature (< 350 C) veins of porphyry Cu-(Au-Mo) deposits (E-veins; Fig. 3), and they show a higher Al, Sb, Ge, and Ga and lower Ti content than quartz from A, B, and D veins from porphyry Cu-(Au-Mo) deposits according to the ...

Zoned Base Metal Mineralization in a Porphyry System: …

Copper (5,000-18,000 mu g/g), sulfur (up to 12,000 mu g/g), and iron (2,100-6,000 mu g/g) concentrations in the intermediate-density fluid inclusions in the milky quartz veins are approximately 5 ...

Geological map of the Pataz district, …

Pataz – Parcoy gold-mining area, in the Eastern Andean Cordillera of northern Peru ( Figure 1 ), has produced more than 8 million ounces of gold, mostly from quartz – carbonate – …

Zoned Base Metal Mineralization in a Porphyry System: …

55 ZONED BASE METAL MINERALIZATION IN A PORPHYRY SYSTEM, MOROCOCHA DISTRICT, PERU milky quartz vein Cordilleran base metal veins Carbonate stage Base metal stage ID L1 L milky quartz vein Cordilleran base metal veins Carbonate stage Base metal stage ID L1 L 6 0 10 10 Fe/(Na+K) Fe 105 10-1 104 103 10-2 2 10 101 200 250 300 350 400 450 …

6" Sphalerite, Pyrite, Chalcopyrite, and Quartz Association

6.55" Gleaming Striated Pyrite Crystals with Quartz - Peru $75 4.9" Quartz and Pyrite Crystal Cluster - Peru $25 6" Sphalerite, Pyrite, Chalcopyrite, and Quartz Association - Peru ... Casapalca Mine also has another interesting feature: bisecting the primary vein is a parallel deposit that, for all intents and purposes, should not be there ...

(PDF) Microtextural Characteristics of Bladed …

The quartz textures of ore samples and the distribution of ore minerals within quartz veins were studied to identify the processes that resulted in the bonanza-grade precious metal ...

Peruvian Minerals

Hübnerite from Pasto Bueno district in northern Peru is a vein system that is tungsten rich. The very dark vitreous tabular hübnerite crystals are intergrown with clear …

Quartz With Gold Veins

4.6cms NATIVE GOLD VEIN Points Slab Peru Quartz 10grs. Mineral Specimen L257 (1.4k) Sale Price $50.00 $ 50.00 $ 199.99 Original Price $199.99 (75% off) FREE shipping Add to Favorites Faux Gold Vein Quartz Long Dangle Earrings, Hypoallergenic Stainless Steel Earrings, Handmade Polymer Clay Earrings, White and Gold Earrings ...

The formation of auriferous quartz-sulfide veins in the Pataz …

The Pataz region in the eastern part of the North Peruvian Department La Libertad hosts a number of important gold mining districts like La Lima, El Tingo, Pataz, Parcoy, and Buldibuyo. Economic gold mineralization occurs in quartz-sulfide veins at the margin of the calc-alkaline Pataz Batholith, that mainly consists of granites, granodiorites, and monzodiorites. The …

Formation of Cu–Au porphyry deposits: hydraulic …

The ladder-vein networks of auriferous quartz veins in hydraulically fractured diorite at the Morning Star and A1 mines in the Victorian Gold Province have been mined and documented since the 19th century without any a priori …

8.6" Cubic Pyrite and Quartz Crystal Association

8.6" Cubic Pyrite and Quartz Crystal Association - Peru (Item #195648), Peruvian Pyrite for sale. FossilEra your source to quality fossil specimens. ... In either case, crystals will precipitate as temperatures cool, just as ice gradually forms when …

(PDF) Trace element composition of quartz from porphyry …

For porphyry Cu-(Au-Mo) deposits, quartz compositions are from publications in which the sequence of quartz-bearing veins and their potential reopening were documented as well as their ...

Geologic and isotopic constraints on the age and origin of …

Semantic Scholar extracted view of "Geologic and isotopic constraints on the age and origin of auriferous quartz veins in the Parcoy mining district, Pataz, Peru" by A. Macfarlane et al. ... Gold production in the Pataz district, northern Peru, is derived from mesothermal veins hosted by the Pataz batholith and basement-hosted epithermal and ...

Vein textures: (a) Polished slab photograph of porphyry-type …

Cordilleran polymetallic mineralization formed during three main paragenetic stages. The first stage is characterized by barren quartz-pyrite veins with sericitic alteration halos (Figs. 3b-d, 5).

Characteristics and evolution of quartz-calcite-sulfide veins in the Nazca-Ocoña belt, Peru

1.7" Chrysocolla and Malachite on Quartz Crystal

It was collected from the Tentadora Mine in the Castrovirreyna Province of Peru. This locale is renown for these vibrant blue chrysocolla and quartz specimens. ... Quartz veins are formed when open fissures are filled with hot water during the closing stages of mountain formation: these veins can be hundreds of millions of years old.

5.9" Realgar, Pyrite, Galena and Quartz Association

Quartz veins are formed when open fissures are filled with hot water during the closing stages of mountain formation: these veins can be hundreds of millions of years old. About Pyrite The mineral pyrite, also known as iron pyrite, is commonly referred to as Fool's Gold because its metallic luster and pale brass-yellow hue give it a superficial ...

Characteristics of the gold-bearing and barren quartz veins …

Quartz veins in the Zaylik-Sarilar deposit can be classified based on color, texture, ore mineralization, grain size, and time. The highest ore grades can be initially observed within dark to black gray quartz bands. ... 2015), the gold-silver epithermal deposits at Pongkor in western Java Indonesia, and the Nazareño deposit in southern Peru ...

(PDF) Quartz Vein Geochemistry Records Deformation Processes in

Veins also form in the vicinity of quartz‐infiltrated shear bands, branching from the main shear plane (c), as sets of en‐échelon veins (d) or as isolated veins (e).

Geology, mineralogy, and cassiterite geochronology of …

The Ayawilca deposit in Pasco, Peru, represents the most significant recent base-metal discovery in the central Andes and one of the largest undeveloped In resources globally. As of 2018, it hosts an 11.7 Mt indicated resource grading 6.9% Zn, 0.16% Pb, 15 g/t Ag, and 84 g/t In, an additional 45.0 Mt inferred resource grading 5.6% Zn, 0.23% Pb, 17 g/t Ag, and 67 g/t …

Textures of auriferous quartz-sulfide veins and

Large volumes of quartz, pyrite, and other ore components are precipitated due to fluid immiscibility caused by pressure fluctuations, and new quartz veins form along both sides of the earlier quartz veins. The fault is now sealed by these new quartz veins and the fluid pressure starts to build until the next breach cycles.

(PDF) Assessment of Gold-Bearing Quartz Vein as …

Assessment of Gold-Bearing Quartz Vein as a Potential High-Purity Quartz Resource: Evidence from Mineralogy, Geochemistry, and Technological Purification February 2023 Minerals 13(2):261

The formation of auriferous quartz-sulfide veins in the …

teration characteristics of the auriferous quartz-sulfide veins hosted by the Pataz Batholith. This representation summarizes in a chronological way observations and conclusions concerning …

(PDF) Deep porphyry veins at Cerro de Pasco, Peru: …

PDF | On Jun 26, 2015, Bertrand Rottier and others published Deep porphyry veins at Cerro de Pasco, Peru: Constraints from mineral, fluid and silicate melt inclusions in hydrothermal quartz | Find ...

Intrusion, skarn and vein paragenesis of the Ferrobamba …

The Eocene-Oligocene Ferrobamba deposit in southern Peru is the largest deposit in the Las Bambas Porphyry Cluster, and is owned by Minera Las Bambas (62.5% MMG Limited). Mining ... Jahuapaylla and late quartz monzodiorite dikes. Vein-hosted and pocket-hosted molybdenite present overlapping ages. Geochronological, ©2017 Society of Economic ...

Characteristics and evolution of quartz-calcite-sulfide veins …

In this study, we focus on two representative deposits in the Nazca-Ocoña metallogenic belt: Mollehuaca and San Juan de Chorunga. At both sites, the mineralization is composed of …

Anatomy of Porphyry-Related Mineralised Au-Cu-Ag-Mo …

Chile-Peru or the Kidston Au breccia pipe. In the latter case geological mapping and gravity ... quartz-sulphide veins which may exploit dilatant fracture systems and migrate significant distances into the wall rocks, and are termed wall rock porphyry systems. For instance the

4" Quartz Crystal Cluster with Pyrite

Quartz veins are formed when open fissures are filled with hot water during the closing stages of mountain formation: these veins can be hundreds of millions of years old. Pyrite (or iron pyrite) is commonly referred to as Fool's Gold because its metallic luster and pale brass-yellow hue give it a superficial resemblance to gold.

Zoned Base Metal Mineralization in a Porphyry System: …

Francisco porphyry stock (Fig. 2) is mineralized by quartz-molybdenite veins associated with pervasive potassic altera-tion and a phyllic alteration overprint.

5" Quartz, Sphalerite & Cubic Pyrite Cluster

Quartz veins are formed when open fissures are filled with hot water during the closing stages of mountain formation: these veins can be hundreds of millions of years old. Sphalerite is a part of the sulfide group and typically exhibits a grey/black …

(PDF) San Rafael, Peru: Geology and structure of the

Polymetallic sulfide-rich veins and quartz-carbonate veins are constrained to have formed between 22.72 ± 0.11 and 22.29 ± 0.24 Ma (2σ), based on adularia 40 Ar/ 39 Ar plateau ages.

Trace element composition of quartz from porphyry …

Quartz chemical compositions were compiled from different studies (Table 1) and each analyzed quartz was assigned a type based on the following criteria.The banded-type quartz are from banded porphyry veins which are abundant in shallow gold-rich porphyry deposits (Muntean and Einaudi 2000 and 2001; Koděra et al. 2014; Rottier et al. 2016).The banded …

Conolly contour diagrams and structural analysis of huebnerite-quartz

The veins are emplaced in Carboniferous (meta-Ishale, (meta-Ntstone and (meta-Isandstone. Cordierite-andalusite-biotite bearing hornfels occurs near the Permian biotite granite A three-dimensional ...

EPITHERMAL LITHOCAPS, HIGH-SULFIDATION GOLD …

in the Minas Conga district, Peru, ~10 km east of the Yanacocha high-sulfidation district, was first assessed in the 1980s for gold mineralization but found to be barren (<100 ppb Au). Subsequent follow-up of stream-sediment anomalies by another company led to the fortuitous identification of sheeted quartz veins in a swamp, below the

Porphyry style quartz veins; (a) typical porphyry quartz-Mo vein …

Download scientific diagram | Porphyry style quartz veins; (a) typical porphyry quartz-Mo vein exhibits fine laminated texture, and disseminated molybdenite on margins and quartz layers, (b ...