High-temperature acid fluids and associated alteration and mineralization extended abstracts of the 3rd Symposium on Deep-Crust Fluids "High-Temperature Acid Fluids and Associated Alteration and Mineralization", held at Tsukuba, October 1990 by Symposium on Deep-Crust Fluids "High-Temperature Acid Fluids and Associated Alteration and Mineralization" (3rd 1990 Tsukuba-shi, Japan)

Cover of: High-temperature acid fluids and associated alteration and mineralization | Symposium on Deep-Crust Fluids

Published by Geological Survey of Japan in Tsukuba-shi, Japan .

Written in English

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  • Hydrothermal alteration -- Congresses.,
  • Metasomatism (Mineralogy) -- Congresses.

Edition Notes

Includes bibliographical references.

Book details

Statementedited by Yukihiro Matsuhisa, Masahiro Aoki, and Jeffrey W. Hedenquist.
SeriesReport / Geological Survey of Japan,, no. 277, Report (Chishitsu Chōsajo (Japan)) ;, no. 277.
ContributionsMatsuhisa, Yukihiro, 1944-, Aoki, Masahiro., Hedenquist, J. W.
LC ClassificationsQE304 .C54a no. 277, QE390.5 .C54a no. 277
The Physical Object
Pagination110 p. :
Number of Pages110
ID Numbers
Open LibraryOL1344815M
LC Control Number92231562

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Temperature Acid Fluids High-temperature acid fluids and associated alteration and mineralization book Associated Alteration an d Mineralization, Report No.Geological Survey of Japan, pp. Mancano DP and Campbell AR, Geochemical, mineralogical, and fluid inclusion data are consistent with progressive acid leaching toward shallower portions of the hydrothermal system, accompanying the general decrease of temperature from degrees to degrees C for the deeper phyllic assemblage and associated subeconomic chalcopyrite + tennantite + bornite Cited by: FLUID ACIDITY AND HYDROTHERMAL ALTERATION AT THE LOS HUMEROS GEOTHERMAL RESERVOIR PUEBLA, MEXICO.

Georgina Izquierdo1, Víctor Manuel Arellano1, Alfonso Aragón1, Enrique Portugal 1and Ignacio Martínez2 1Instituto de Investigaciones Eléctricas, Apartado PostalCuernavaca, Morelos.México.

[email protected] 2Residencia Los Humeros, Gerencia de. Izawa E () Hydrothermal alteration associated with Nansatsu-type gold mineralization. Symposium on high temperature acid fluids and associated alteration and mineralization. by: 1. Fluid inclusion homogenization temperatures in quartz veins range from °C to °C (peak at °C– °C), with salinities of 4–9 wt.% NaCl equiv.

At temperatures of °C the. The mineralogy of the deposit and of the alteration assemblages is typical of the acid-sulfate (high-sulfidation) class of volcanic-hosted epithermal deposits. Fluids associated with alteration and mineralization have moderate temperatures (– °C) and low salinities (less than 6% wt.

NaCl equivalent); high-temperature, high-salinity fluids similar to porphyry-style systems also circulated at Cited by: In these host rocks, fluids may range from highly acidic to near-neutral.

Mineral buffering limits the maximum pH to near-neutrality however; alkaline pH requires more specialised scenarios. One environment in which fluid pH may be basic at high temperature °C is when the host lithology is silica-undersaturated and by: 7.

MODELING OF FORMATION OF ACID WATER DISCHARGED FROM HIGH TEMPERATURE GEOTHERMAL RESERVOIR Kohei Akaku1, Kaichiro Kasai2 and Katsuto Nakatsuka3 1JAPEX Research Center, Hamada, Mihama-ku, Chiba-shiJapan 2Japan Metals and Chemicals Co., Ltd.

72 Sasamori, Ukai, Takizawa-mura, Iwate-gun, Iwate-kenJapanCited by: 3. Hydrothermal alteration High-temperature acid fluids and associated alteration and mineralization book volcanic host rocks involves the replacement of primary igneous glass and minerals (pla- gioclase, orthoclase, quartz, biotite, muscovite, amphibole, pyroxene, titanomagnetite) with alteration minerals stable at the conditions of alteration, generally in the temperate range of – ° Size: KB.

Potassic alteration The characteristic minerals of the potassic alteration are K-feldspar, biotite and sericite.

This mineralogical assemblage develops with a pervasive character in the central part of the porphyry quartz-micromonzodiorite stock. The potassic alteration with adularia is specific for the epithermal system associated with.

SUBSURFACEACID ALTERATION Based on the alteration mineral distributions in more than wells, weselected three wells for detailed study of acid alteration, HT-2, HR-7, and HR the reinjection area adjacent to the Komatsu jigoku. DD Alunite Pyrophyllite Andalusite I I I 0 S N Figure Size: KB.

The Martabe gold district, situated on the north-west coast of Sumatra, Indonesia, consists of four high-sulfidation epithermal gold-silver deposits over an 8 km strike length: Purnama, Baskara, Kejora and Gerhana and one low-sulfidation epithermal gold-silver deposit, Pelangi.

Resources have been estimated for the three principal known deposits, Purnama, Baskara and by: 3. High-temperature acid fluids and associated alteration and mineralization: extended abstracts of the 3rd Symposium on Deep-Crust Fluids "High-Temperature Acid Fluids and Associated Alteration and Mineralization", held at Tsukuba, October n Warera wa hoshi no ko: Zuisōroku: Zusetsu chikyū: われらは星の子: 随想錄.

Geology and Geochemistry of Epithermal Systems--Volume 2 of Reviews in Economic Geology--was created to accompany a Society of Economic Geologists (SEG) short course of the same name that was given in October,prior to the annual meetings of the Geological Society of America and Associated Societies in Orlando, Florida.

As was. The abundance of allanite-(Ce) and scarcity of REE fluorocarbonates and REE phosphates (the principal ore minerals in many REE deposits) in the Sin Quyen deposit are interpreted to reflect the high-temperature, Si- Al- and Ca-rich, and F- and CO 2-poor nature of the by: Gold mineralization in most shear zones is post-peak metamorphism and involves a multi-stage alteration event accompanied by gold mineralization through continuous fluid flow over a Cited by: Major Styles of Mineralization and Hydrothermal Alteration and Related Solid- and Aqueous-Phase Geochemical Signatures By Dana J.

Bove, M. Alisa Mast, J. Bradley Dalton, Winfield G. Wright, and Douglas B. Yager Chapter E3 of Integrated Investigations of Environmental Effects of Historical Mining in the Animas River Watershed, San Juan County. Alteration-mineralization zoning and fluid inclusions of the high sulfidation epithermal Cu-Au mineralization at Zijinshan, Fujian Province, China Chil Sup So, De Quan Zhang, Seong Taek Yun, Cited by: Alteration Minerals & Assemblages • Some alteration minerals or alteration assemblages are characteristic of particular temperature & fluid pH conditions.

• The pH – temperature table has been subdivided into alteration types with diagnostic mineral Size: 2MB. In geothermal fields on Earth, the ΣSiO 2 value of fluids is thought to be strongly influenced by reactions of alteration minerals, including serpentine, brucite and talc Cited by: 1.

Introduction. Hydrothermal mineralization is one of the primary ore-forming processes on Earth, existing widely not only in extensional tectonic settings, for example, continental or oceanic rifts, but also in compressional ones, such as subduction zones and collisional orogenic belts [].Traditionally, studies on fluid-rock interaction [2, 3], fluid inclusions [4–6], element partitioning Author: Xing Ding, Daniel E.

Harlov, Bin Chen, Weidong Sun. White, N.C. (): High Sulfidation Epithermal Gold Deposits: Characteristics and a Model for their Origin; in High-temperature Acid Fluids and Associated Alteration and Mineralization, Geological Survey of Japan, Report No.pages alteration (kaolinite, alunite) occurs near surface, which may be associated with high-sulfidation epithermal alteration and Au-Ag±Cu mineralization (see below).

Porphyry ore deposits are characterized by very large tonnages (commonly measured in billions of tonnes) of relatively low-grade mineralization (typically. Abstract. Low temperature fluids of diverse origin are widely believed to have played a dominant role in the formation of both primary kaolin and iron vein deposits in S.W.

Englan. Corbett: Epithermal Gold For Explorationists PaperApril 4 Figure 3. Derivation of low and high sulphidation fluids including arc and rift low sulphidation.

A dapted from Corbett () and Corbett and Leach (). The secondary classification of magmatic File Size: 1MB. SPE's latest book, Acid Stimulation, ensures a comprehensive and up-to-the-minute presentation by including an author team of 19 subject matter experts, all at the forefront of the development of acidizing technology.

Each chapter, authored separately by individuals from the author team, delivers an authoritative presentation of the key areas.

The original ascending ore fluid was probably CO 2-bearing fluid which evolved into two phase fluid by immiscibility due to pressure drop in the mineralization channels. Furthermore, the temperature and salinities of two-phase aqueous fluids were later most likely decreased by.

To improve our understanding of the formation of acid‐sulfate fluids and associated crustal alteration, we report aqueous lithium (Li), boron (B), magnesium (Mg), and strontium (Sr) isotope ratios in a range of Figure 1.

Sketch illustrating the formation of (a) black smoker fluids and (b) acid Author: Frederike K. Wilckens, Eoghan P. Reeves, Eoghan P. Reeves, Eoghan P. Reeves, Wolfgang Bach, Jeffrey. Interaction between high-temperature magmatic fluids and limestone explains ‘Bastnäs-type’ REE deposits in central Sweden Fredrik Sahlström 1 Erik Jonsson 1, 2Author: Fredrik Sahlström, Erik Jonsson, Erik Jonsson, Karin Högdahl, Valentin R.

Troll, Chris Harris, Ester. Abstract. The effect of brine ionic composition on oil recovery was studied for a limestone reservoir rock at a high temperature. Contact angle, imbibition, core flood and ion analysis were used to find the brines that improve oil recovery and the associated by: The late stage of the fluids differentiation is determined by the hydrogen-ion metasomatism (phyllic alteration, argillic alteration), characterized by a large vertical variation.

The hydrogen-ion metasomatism is associated with the bor metasomatism, generated by acid Author: Floarea Damian. Low Temperature Minerals (0°° Celsius) Medium Temperature Mineral (70°° Celsius) High Temperature Minerals (°° Celsius) Galena and Sphalerite with Calcite Siderite after Calcite on Galena Dolomite after Calcite on Sphalerite Nanisivik Baffin Island Collection Galena Deposits About the Hydrothermal Minerals Display University of Waterloo alumnus Jim Reimer donated.

The farnesoid-X-receptor (FXR) protects against inflammation and cancer of the colon through maintenance of intestinal bile acid (BA) homeostasis. Conversely, higher levels of BA and cyclooxygenase-2 (COX-2) are risk factors for inflammation and cancer of the colon.

In the United States, n-6 linoleic acid (LA) is the most commonly used dietary vegetable by: 5. Controls to low sulphidation epithermal Au-Ag mineralisation (pyrite, sphalerite, galena, chalcopyrite) typically within quartz veins with local carbonate, and associated near neutral wall rock alteration (illite clays), deposited from dilute hydrothermal fluids is in contact with high temperature sulphides.

• While boiling fluids File Size: KB. Start studying Urinary/Fluid Balance. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Search. associated with a relative deficiency of hydrogen ions or an excess of bicarbonate ions.

anion components of the carbonic acid-bicarbonate buffer system. in understanding the factors that control vent-fluid and de-posit composition (e.g., see recent reviews by German and Von Damm [] and Hannington et al. []). Speci al iSSu e Fe at u r e Generation of Seafloor Hydrothermal Vent Fluids and associated Mineral Deposits By M arG ar e t Ki N G Sto N t i Ve y This article has been published in.

Potassic alteration involves the minerals biotite, potassium feldspar, and adularia formed in place of plagioclase and mafic minerals. [Barnes, ]. Potassium enrichment occurs at a high temperature. This type of alteration can take place prior to all of the magma has.

When these fluids come into contact with rocks they set off chemical reactions, which tend to approach equilibrium and through processes of dissolution and precipitation develop new mineral assemblages There are different types and styles of hydrothermal alteration, depending on the nature, chemistry, temperature and pressure of the circulating Cited by: 6.

@article{osti_, title = {Field Trip Guide to Serpentinite, Silica-Carbonate Alteration, and Related Hydrothermal Activity in the Clear Lake Region, California}, author = {Goff, Fraser and Guthrie, George}, abstractNote = {This guide is designed to familiarize scientists with the geology, structure, alteration, and fluids typical of California serpentinites for purposes of carbon dioxide.

elements than the older, more acid, coarse, sandy formations. Significant leaching and weathering of soils in tropical regions, under conditions of heavy rainfall and high temperature, accentuate mineral deficiencies. It is generally accepted that forbs (weeds) and legumes are richer in a number of minerals than are Size: KB.

Metasomatism (from the Greek μετά (change) and σῶμα (body)) is the chemical alteration of a rock by hydrothermal and other fluids.

It is the replacement of one rock by another of different mineralogical and chemical composition. The minerals which compose the rocks are dissolved and new mineral formations are deposited in their place.This type of alteration is related to moderate-high temperature and high acidity fluids that are typically associated with the surface expression of the fluids from porphyry and high-sulphidation.Hydrothermal mineral deposits are accumulations of valuable minerals which formed from hot waters circulating in Earth's crust through fractures.

They eventually create rich-metallic fluids concentrated in a selected volume of rock, which become supersaturated and then precipitate ore some occurrences, minerals can be extracted at a profit by hermal: Ore minerals are precipitated by a hydrothermal solution percolating through intergranular spaces and along bedding planes and fractures in the host rocks.

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