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3 edition of Mineralogic and grade-tonnage information on low-sulfide Au-quartz veins found in the catalog.

Mineralogic and grade-tonnage information on low-sulfide Au-quartz veins

Mineralogic and grade-tonnage information on low-sulfide Au-quartz veins

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Published by U.S. Dept. of Interior, Geological Survey, [Books and Open-File Reports Section, distributor in [Denver, Colo.?] .
Written in English

    Subjects:
  • Pyrites -- Grading.,
  • Ore deposits -- Grading.

  • Edition Notes

    Includes bibliographical references (p. 9-17).

    Other titlesMineralogic and grade tonnage information on low-sulfide Au-quartz veins.
    Statementby James D. Bliss and Gail M. Jones.
    SeriesOpen-file report -- 88-229., U.S. Geological Survey open-file report -- 88-229.
    ContributionsJones, Gail M., Geological Survey (U.S.)
    The Physical Object
    FormatMicroform
    Pagination2 microfiches
    ID Numbers
    Open LibraryOL14661615M

    What are the two basic groups of metalic mineral resources? subject(s): Coal, Bibliography, Coal reserves 'Mineralogic and grade-tonnage information on low-sulfide Au-quartz veins' -- subject.   The Géant Dormant gold mine is a sulfide-rich quartz vein gold deposit hosted by a volcano-sedimentary sequence and an associated felsic endogenous dome and dikes. The auriferous quartz-sulfide veins were preceded by two synvolcanic gold-bearing mineralizing events: early sulfidic seafloor-related and later disseminated pyrite in the felsic dome. This deposit differs from classical Cited by: 6.

      Porphyry Copper Deposit Model By David A. John, editor, with contributions by Robert A. Ayuso, Mark D. Barton, Richard J. Blakely, Robert J. Bodnar, John H. Dilles, Floyd Gray, Fred T. Graybeal, John C. Mars, Darcy K. McPhee, Robert R. Seal, Ryan D. Taylor, and Peter G. Vikre Chapter B of Mineral Deposit Models for Resource Assessment. Euhedral cassiterite from quartz veins in which Sn > W is zoned, showing sequences of alternating narrow, parallel, darker and lighter zones in transmitted light (Fig. 2a).The darker zones are pleochroic from ɛ red to ω translucent and colourless, whereas the lighter zones are colourless to tan and translucent. The darker zones exhibit products of exsolution, while the lighter zones only Cited by:

    The gold metal tonnage, proved previously, within an area smaller than km2 in the gold belt II amounted to t, with the average gold grades for the major Au quartz veins (7 and 8) in this. Structural chemistry of Mn, Fe, Co, and Ni in manganese hydrous oxides: Part I. Information from XANES spectroscopy Download the Scanned PDF: ALAIN MANCEAU, ANATOLII I. GORSHKOV, VICTOR A. DRITS Structural chemistry of Mn, Fe, Co, and Ni in manganese hydrous oxides: Part II. Information from EXAFS spectroscopy and electron and X-ray.


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Mineralogic and grade-tonnage information on low-sulfide Au-quartz veins Download PDF EPUB FB2

Mineralogic and grade-tonnage information on low-sulfide Au-quartz veins Open-File Report By: J.D. Bliss and G.M. Jones.

Get this from a library. Mineralogic and grade-tonnage information on low-sulfide Au-quartz veins. [James D Bliss; Gail M Jones; Geological Survey (U.S.)].

The low-sulfide Au-quartz grade and tonnage model is based on deposits containing metric tons or more of gold (Bliss, ). Over 50 percent of the deposits in the worldwide model (Bliss and Jones, ) are located within this tract and include those of the California Mother Lode and the Grass Valley district.

GRADE AND TONNAGE MODEL Reliable production data for low sulfide Au-quartz vein deposits can be difficult to obtain and may be incomplete. Data on reserves are rare due, in part, to the eratic nature of veins.

Available data are commonly of poor quality or by: 9. GRADE AND TONNAGE MODEL OF LOW-SULFIDE Au QUARTZ VEINS. By James D. Bliss. COMMENTS All mines within km were combined and only deposits containing more than 99 tones are included.

Gold grade is correlated with tonnage (r = ) and with silver grade (r =n = 39). See figs. Figure Tonnages of low-sulfide Au quartz vein deposits. range is to million metric tonnes. Because of the high-grade nature of some veins (greater than 30 to 50 g gold/t), many low tonnage deposits (for instance, Chugach-type low sulfide gold deposits; Bliss, ) are developed by small, underground workings.

Deposits that contain at least to 5 million oz gold in low grade oreFile Size: KB. In southern Monterey County the Los Burros mining district, which produced approximately metric tons of gold from low-sulfide Au-quartz veins, is localized in greenschist facies rocks of the Franciscan Complex that are intruded by serpentine (Hart, ).

Similar higher-grade metamorphic rocks may be present elsewhere in the Coast Ranges. DESCRIPTIVE MODEL OF LOW-SULFIDE Au-QUARTZ VEINS. By Byron R. Berger. Model 36a. APPROXIMATE SYNONYMS Mesothermal quartz veins, Mother Lode veins. DESCRIPTION Gold in massive persistent quartz veins mainly in regionally metamorphosed volcanic rocks and volcanic sediments.

GEOLOGICAL ENVIRONMENT. Rock Types Greenstone belts; oceanic metasediments:. We estimated that there may be two low-sulfide Au-quartz vein deposits in the area of Centennial Ridge district in the Medicine Bow Mountains.

Although the total amount of gold ore recovered in the district is relatively low, there are numerous gold occurrences throughout the district indicating that widespread mineralization occurred along.

Jamestown Mine: Alternate or previous names: Includes Harvard, Crystalline, Low-sulfide Au-quartz vein: Mark3 model number: Host and associated rocks. Host or associated GAIL M.,MINERALOGIC AND GRADE-TONNAGE INFORMATION ON LOW-SULFIDE AU-QUARTZ VEINS: U.

GEOLOGICAL SURVEY OPEN-FILE REPORT99 P. Deposit. JULIHN, C. Low-sulfide Au-quartz veins, also known as mesothermal or orogenic Au deposits (Groves et al., ), are the most widespread type of Au-bearing mineral occurrence (Ashley, ). Their particular geoenvironmental characteristics have been reviewed by Goldfarb et al.,Ashley, and Seal and Hammarstrom ().Cited by:   Bliss JD, Jones GM () Mineralogic and grade-tonnage information on low-sulfide Au-quartz veins.

US Geological Survey, Open-file Report 88– Cassidy KF () Geological evolution of the eastern Yilgarn Craton (EYC) and terrane, domain and fault system by: 1. Descriptive and grade-tonnage models of Archean low-sulfide Au-quartz veins and a revised grade-tonnage model of Homestake Au. Open-File Report Many of the gold deposits of the southeastern United States are analogous to the low-sulfide Au-quartz vein deposit model (Berger, ).

There are broad similarities in ore controls (i.e., veins controlled by regional fault systems or folds), in vein and alteration mineralogy, and in their host rocks. PDF | On Jan 1,Stephen E. Box and others published ASSESSMENT OF UNDISCOVERED MINERAL RESOURCES IN THE PACIFIC NORTHWEST: A CONTRIBUTION TO THE INTERIOR COLUMBIA BASIN ECOSYSTEM MANAGEMENT.

Berger BR () Descriptive model for low-sulfide Au–quartz veins. In: Cox DP, Singer DA (eds) Mineral deposit models. US Geol Surv Bul Bliss JD, Jones GM () Mineralogic and grade-tonnage information on low-sulfide Au–quartz veins.

US Geol Surv Open-File Rep 88–, 99 p Low-sulfide quartz gold deposit model. U S Cited by: 8. Metamorphic gold-quartz veins in northwestern Nevada, U.S.A. formed during both brittle and brittle-ductile shear deformations in three tectono-stratigraphic terranes.

The veins are concentrated in a to km-wide, km-long, linear, northtrending corridor. The veins show a consistent northeast strike in the central parts of the corridor and several kinematic indicators strongly suggest Cited by: 2.

C arlin-type gold deposits are epigenetic, disseminated, auriferous pyrite (marcasite or arsenopyrite) deposits characterized by carbonate dissolution, argillic alteration, sulfidation, and silicification of typically calcareous sedimentary rocks.

Gold and pyrite precipitate together from H 2 S-rich fluids by sulfidation of host-rock Fe. As a result, Fe is relatively immobile and S and Au are.Predicting gold production from low-sulfide gold-quartz veins: California Geology, v.

41, no. 8, p.Quantitative estimates of undiscovered metal endowment for selected mineral deposit types in the Chugach National Forest, Alaska: U.S. Over 62 percent of themetric tons of gold discovered to date is located in four countries and more than 68 percent occurs in four types of mineral deposits.

Bliss, James D., and Jones, Gail M. (), Mineralogic and Grade-Tonnage Information on Low-Sulfide Au-Quartz Veins, USGS Open-File Report99 p. Mining Magazine () (January): 50 (Jamestown Mine).Gold here is mainly observed in quartz-pyrite veinlets, pockets, and lenses.

In the Late Paleozoic ( ± 14 Ma), resumed miner- alization produced low-sulfide Au-quartz veins (Laverov et al., ). The principal ore mineral here is pyrite. Native Au, which is fine, mainly occurs in pyrite. There is no consensus about the deposit by: Get this from a library!

Descriptive and grade-tonnage models of Archean low-sulfide Au-quartz veins and a revised grade-tonnage model of Homestake Au. [T .