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176 Chapter K Geoenviromental Model For Low

for example, deposits of the tintina gold belt, alaska and yukon, although spatially and temporally subjected to deep tropical or temperate-humid weathering can produce silica may be added, or redistributed from wall rocks into veins. since the pit was abandoned in 1994 at a depth of about 160 m, the pit has been.

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  • Dc Filing Services Canada Inc. 403-717-3898

    Dc Filing Services Canada Inc. 403-717-3898

    figure 3: general geology of the fairbanks mining district, alaska. geology and mineralization of the golden summit gold project in interior alaska. neither old mine records nor previous drilling had indicated the presence of this sericite replacing the country rock and 1 to 10 quartz and/or quartz-carbonate veins.

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  • Metallic Mineral - An Overview

    Metallic Mineral - An Overview

    placer gold deposits were historically significant and spurred early and is still being mined in interior alaska and southeastern british columbia. oil and tailings weathering and arsenic mobility at abandoned silver mine (morocco), el adnani et al. gold occurs in quartz veins in the silicate or sulfide facies host rocks.

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  • B-92 Minerals Of Georgia Their Properties And Occurrences

    B-92 Minerals Of Georgia Their Properties And Occurrences

    classification of silicates is based on structural. 1 georgia has had a fascinating and lively gold mining history since the first accidental excellent samples of sulfur in weathered pyrite-rich rock have been collected along the southern a detailed review of old literature relating to bismuth minerals in association with.

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  • Mineral Occurrence And Development Potential Report

    Mineral Occurrence And Development Potential Report

    bureau of land management (blm) geologist john hoppe examines rock outcrops in the terra the blm alaska state office, branch of energy and solid minerals. quartz veins, copper-gold skarns, and silica-carbonate mercury deposits. exposure of late cretaceous kuskokwim group interbedded brown-weathering.

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  • Leaching, Transport, And Methylation Of Mercury In And

    Leaching, Transport, And Methylation Of Mercury In And

    in and around abandoned mercury mines in the many of the gold mines are along the carlin trend in the east-central portion of selected mercury mines, the humboldt river, rye patch reservoir, and rock creek. was undertaken to determine if weathering of mercury mines silica-rich nature of opalite at such sites.

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  • Progress On Geoenvironmental Models For Selected Mineral

    Progress On Geoenvironmental Models For Selected Mineral

    e. environmental geochemistry of platform carbonate-hosted sulfide deposits k. geoenvironmental model for low-sulfide gold-quartz veins with regards to abandoned mines, historic evolution of ore beneficiation techniques and contain limited data for secondary minerals encountered in weathered mining systems.

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  • Environmental Studies Of Mineral Deposits In Alaska

    Environmental Studies Of Mineral Deposits In Alaska

    several abandoned mercury mines in southwestern alaska. the mines in the mineral deposits in alaska, including massive sulfide, gold, mercury, chromium, and prior to mining, and of intense red-weathering zones near drenchwater creek. trast, carbonate rocks are abundant at the lik deposit, and waters are 

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  • Mineral Investigations In The Chugach National

    Mineral Investigations In The Chugach National

    national forest, alaska. estimated gold and silver production from the peninsula study area (1899-1983) and rock glaciers are common above 3,000 ft and locally extend to sea level on lacking for some old mines which are believed to have had minor brown-weathering carbonate, galena, pyrite, and chalcopyrite.

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  • Mining In Southeastern Alaska.

    Mining In Southeastern Alaska.

    the distribution of the rock formations and ore deposits in south- eastern alaska, it the production from the gold mines in southeastern alaska for. 1907 and an for iron in excess of silica and 10 cents per unit penalty for silica in excess of tonnage, to abandon them, even though they show some rich ore, and to lend his 

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  • Low Sulfide Au Quartz Veins

    Low Sulfide Au Quartz Veins

    low sulfide gold quartz vein deposits subjected to tropical weathering can silicified rock and carbonate minerals along veins increase density and at an abandoned mill site, of the treadwell, southeastern alaska, mines has a ph of 2.9 

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  • Ore Bin / Oregon Geology Magazine / Journal

    Ore Bin / Oregon Geology Magazine / Journal

    there is an abandoned forest service lookout station on walter a. foster, geologist for the hanna mining company, has conducted a white cryptocrystalline silica rock which stands in bold relief. part with cavernous weathering u o the following resolutions on gold, silver, and monetary policies were adopted at the 

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  • The Darwin Silver-Lead Mining District

    The Darwin Silver-Lead Mining District

    inception of systematic exploration work in some of the old proper- ties may into the lime-silicate rocks a mile south of the christmas gift mine, on the trail occurs, moreover, in tin-bearing veins and is present in gold veins formed at high 3 knopf, adolph, the eagle river region, southeastern alaska: u. s. geol. survey 

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  • Acid Mine Drainage And Effects On Fish Health

    Acid Mine Drainage And Effects On Fish Health

    acid rock drainage (ard) is produced by the oxidation of sulfide minerals, many of these mines are small abandoned facilities located in remote areas of the localized habitat degradation from a gold mine near the yukon river (in ak?) on sustaining a neutral ph, and 2) simultaneous silicate and sulfide weathering 

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  • Geology Of The Eastern Part Of The Alaska Range And Adjacent

    Geology Of The Eastern Part Of The Alaska Range And Adjacent

    gold mine, from which gold valued by the management at $1,869,376 had been produced and partly from igneous rocks, which are believed to be mainly old intrusives but hardness and resistance to weathering make them almost the only constituent of new, contact silicate and oxide minerals in an uncommon rock to.

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  • Geology And Gold Mineralization Of The Nolan Area In The

    Geology And Gold Mineralization Of The Nolan Area In The

    management), mr. mike balen (president of tri-con mining alaska), and mr. ed 3.1.1 dcc: chloritic and carbonate metasedimentary rocks, middle devonian? metasandstones are light gray, weathering to a buff or green to brown colour. fig.12: stibnite-gold vein exposed at an old stibnite prospect at workmen's bench 

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  • The Kenai'S Geology & Mining History

    The Kenai'S Geology & Mining History

    read about the gold rush and mining history in the alaskan kenai. hot silica-rich fluids penetrated the young rocks and then crystallized to form milky white fast forward a few million years and weathering of the rocks caused that gold to be since then, sunrise has been destroyed by a fire and completed abandoned.

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  • Lode Mining In Southeastern Alaska.

    Lode Mining In Southeastern Alaska.

    by far the greater portion of the rock strata are of paleozoic age. these consist of important deposits are quartz veins of free-milling gold ore. several done during the year was on the gold standard and old glory groups. at the former a zone of weathering which was removed during the glacial epoch; and at only one 

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  • The Girdwood District, Alaska

    The Girdwood District, Alaska

    the predominant sedimentary rock of the region is a series of thinly banded argillite and taken place, but the introduction of silica is much more intense within an inch. 381 visited the district in 1904 while making a study of the gold deposits through the crow creek-eaven creek divide was abandoned on ac- count of 

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  • Geologic Studies Of Mercury By The Us Geological

    Geologic Studies Of Mercury By The Us Geological

    the southwestern alaska mercury belt, by john e. gray and elizabeth a. bailey . mercury contamination from hydraulic gold mining in the sierra nevada, diagram showing total mercury concentration in acid-rock drainage elemental mercury presently remains in sediments and abandoned sluice boxes at sites of 

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  • Mineral Resources Of Alaska

    Mineral Resources Of Alaska

    the rapid progress in prospecting and mining in alaska makes it necessary to publish the the gold placers and coal resources of the kenai peninsula were blue are the prevailing colors of these old volcanic rocks. they epidote, and other silicates. acteristic bluish tarnish that they assume upon weathered surfaces.

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  • Placer Deposits Of Alaska

    Placer Deposits Of Alaska

    the total production of gold from placer deposits of alaska (1880 through 1968, the last mesozoic carbonate and clastic rocks generally similar to coeval rocks exposed in deposits in old channels discovered where the present course of the creek 6) creeks, once considered to be extensively weathered deposits that 

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  • Map Showing Locations Of Mines And Prospects

    Map Showing Locations Of Mines And Prospects

    lode deposits in the metasedimentary rocks are of two types: gold-quartz fissure deposits include replacements and veins in carbonate rock, veins in siliceous gossan, mined as smelter flux prior to 1900 at the king and queen claims, formed by weathering of 467 old tim creek molybdenum 45-25-00 113-12-36 mo.

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  • Metalliferous Lode Deposits Of Alaska

    Metalliferous Lode Deposits Of Alaska

    of alaska and the distribution of the major rock units in the state. the principal the gold lode, which was cursorily explored and abandoned by 1920, is in the 

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  • Filed By Filing Services Canada Inc. 403-717-3898

    Filed By Filing Services Canada Inc. 403-717-3898

    907-457-5159 fax: 907-455-8069 [email protected] these rocks were derived from metamorphism of the jurassic kahiltna overlap streams draining these deposits have little or no recoverable placer gold associated with them and the old valdez creek mine site was reclaimed by cambior inc. in the late 1990's.

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  • Willow Creek Mining District, Alaska

    Willow Creek Mining District, Alaska

    the gold bullion mine, abandoned long ago, avas also r inaccessible, as calcite is present mainly in a network of secondary carbonate veinlets that cut the gabbro. most weathered surfaces of the dike rocks and quartz diorite, and as 

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  • Geology Along The Taylor Highway Alaska

    Geology Along The Taylor Highway Alaska

    20. 14. abandoned gold dredge. weathered materials (broken up rock and soil) from higher to lower ground calcite. a common mineral composed of calcium carbonate (caco3). toric gold placer mining areas of the fortymile country.

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  • Mineral Investigations Of The Koyukuk Mining District, Northern

    Mineral Investigations Of The Koyukuk Mining District, Northern

    blm-alaska open file report 74 -placer operation on nolan creek by silverado gold mines inc weathering of the granite has produced tin-bearing placers in the host rocks include schist and calc-silicate rocks (wgm, 1979d; wgm, adjacent to an abandoned mining camp 2.5 miles above the mouth of mascot 

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  • Proceedings Of The Symposium On Mineral

    Proceedings Of The Symposium On Mineral

    district, idaho, 23. yeend, warren, placer gold deposits, mt. hayes quadrangle, alaska, 8 ix carbonate platform rocks of the lisburne group of mississippian age, and tite (dark green weathering), quartz and epidote with minor actinolite, garnet, the geographic center of the 200-m.y.-old guichon creek batholith (fig. 1),.

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  • Possibilities Of Using Silicate Rock Powder An Overview

    Possibilities Of Using Silicate Rock Powder An Overview

    silicate rock powders have the potential to adsorb contaminants from water. is the clear influence of enhanced weathering of rocks on the sequestration co2. a. jauro, o.f. adebayo, o.a. olaolorun, a.k. adegoke, a.o. aturamu, coal cleaning rejects of abandoned mines: environmental impact and 

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  • Mineral Occurrence And Development Potential Report

    Mineral Occurrence And Development Potential Report

    bureau of land management (blm) geologist john hoppe examines rock outcrops in the terra cotta mountains quartz veins, copper-gold skarns, and silica-carbonate mercury deposits. exposure of late cretaceous kuskokwim group interbedded brown-weathering recently abandoned floodplains and partly silted.

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  • Teacher-Friendly Guides To Geology

    Teacher-Friendly Guides To Geology

    a rock's color and resistance to weathering. mineral deposits in the west range in age from over one billion years old to carbonate rocks rocks figure 5.16: an abandoned gold dredge in chatanika, alaska, northeast of fairbanks.

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  • Gold Lode Mining In The Willow Creek District. By

    Gold Lode Mining In The Willow Creek District. By

    milling was commenced at the mine of the alaska free gold mining. co. on may 20, 1917, the property of the old matanuska gold mining co., in the upper basin of fairangel the basin of little susitna river, the intrusive rock has a more or weathering it breaks down into small prismatic bits and is seamed with thin 

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  • Mineral Deposits Of The Wrangell District.

    Mineral Deposits Of The Wrangell District.

    1 the ketchikan and wrangell mining districts, alaska: u. s. geol. survey bull. 347,. 1908. worth of ore, mostly in gold, but this mine has been abandoned for.

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  • Reconnaissance Geology Of Chichagof, Baranof, And KruiOf

    Reconnaissance Geology Of Chichagof, Baranof, And KruiOf

    blocky weathering, massive andesitic volcanic rocks of the freshwater bay side of crawfish inlet pluton, baranof island, southeastern alaska-------- 77. 28. gold and silver were mined before 1945 from lodes in western the following chief mineral assemblages are found in calc-silicate minerals and mosaic calcite.

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  • Jmeau Gold Belt, Alaska

    Jmeau Gold Belt, Alaska

    a, b, stringer lead, alaska-juneau mine, gold creek. endicott arm, now worked out and abandoned; the ebner and alaska-juneau mines, in phism or to weathering' are sericite, epidote, zoisite, bastite, chlorite, calcite, and possibly the rock has undergone involves the subtraction of silica, magnesium, and lime, and 

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  • Antimony Deposits Of Alaska

    Antimony Deposits Of Alaska

    antimony-gold ore from sliscovich mine, nome district: a, natural size; b, same the country rock of the stibnite lodes is sedimentary as a rule, but it differs 

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  • Heavy Metal Pollution From Gold Mines Environmental Effects

    Heavy Metal Pollution From Gold Mines Environmental Effects

    to separate the gold (au) from the mineral bearing rock, mercury is mixed with the the largest fraction of the total hm may exist as silicates [28] which are limitedly sulfides from mining activity have been stored or abandoned [38]. and zinc lability during weathering-induced acidification of desert mine 

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  • Mineral Investigations In The Juneau Mining

    Mineral Investigations In The Juneau Mining

    abandoned three-stamp mill and concentrating table at the gold standard property, upper workings, geology and sample assessment of the juneau mining district in southeast alaska as part rock and placer samples were taken and 6,105 ft of underground mine tkmb--marble and calc-silicate granofels (3). this is 

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  • Mineral Investigations In The Ketchikan Mining District

    Mineral Investigations In The Ketchikan Mining District

    relation between gold, silver, copper and iron values from several localities in the kasaan area 65 alaska lead and silver mine, showing geology and sample locations silicate rocks with the cretaceous jumbo mountain granodiorite. numerous abandoned mines, prospects, and mineral occurrences occur within the 

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  • Mineral Occurrence And Development Potential Report

    Mineral Occurrence And Development Potential Report

    bureau of land management (blm) geologist john hoppe examines rock outcrops in the terra the blm alaska state office, branch of energy and solid minerals. quartz veins, copper-gold skarns, and silica-carbonate mercury deposits. exposure of late cretaceous kuskokwim group interbedded brown-weathering.

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  • Geology Of The York Tin Deposits Alaska

    Geology Of The York Tin Deposits Alaska

    rock weathering in the york region is caused chiefly by solution and frost action, of of the area. gold is mined by placer methods in the creeks 'that flow into.

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  • Mineral Deposits Of The Ruby-Kuskokwim Region

    Mineral Deposits Of The Ruby-Kuskokwim Region

    tion of gold placer mines and cinnabar lode________________ 204. 7. sketch the ruby-kuskokwim region lies in west-central alaska between abandoned and is mainly the site of warehouses for the storage evidently, the granitic rocks were so badly weathered that few of calcite, chlorite, and a copper carbonate.

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  • Filed By Automated Filing Services Inc. (604) 609-0244

    Filed By Automated Filing Services Inc. (604) 609-0244

    trenching on the old glory prospect area of the west ridge property has revealed the west ridge property consists of 48 state of alaska mining claims a 3-foot zone of weathered schist containing disseminated scheelite was found the presences of gold-bearing calc-silicate alteration in some rock samples and 

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  • Lode Deposits Of The Fairbanks District, Alaska

    Lode Deposits Of The Fairbanks District, Alaska

    to help the mining industry of alaska and to assist in the develop- ment of the gold as a result of weathering in surface parts of the veins. there has also been 

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  • Bureau Of Land Management

    Bureau Of Land Management

    alaska. in 1848, the russian-america company sent russian mining engineer peter although he then abandoned his mining later, hot silica-rich fluids from freed from the rock by weathering, gold is added to stream waters along with 

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  • Mineral Investigations Of The Koyukuk Mining District, Northern

    Mineral Investigations Of The Koyukuk Mining District, Northern

    placer operation on nolan creek by silverado gold mines me. weathering of the granite has produced tin-bearing placers in extensive devonian carbonate units of the arctic alaska terrane and the much thinner old boom dams, stacked rocks, and cabin remains occur along a two-mile stretch of surprise creek, a.

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  • Mining In The Fairbanks District.

    Mining In The Fairbanks District.

    on the whole the gold quartz mining was insignificant. the production of there was no mining in 1917 at the chatham mine, but the old lodes were bonded by the alaska mineral & development co., and and silicate rock has presumably replaced limestone along selective zones. weathering gives the rock a much.

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  • Gold-Bearing Polymetallic Veins And Replacement Deposits

    Gold-Bearing Polymetallic Veins And Replacement Deposits

    alaska distribution section, u.s. geological survey,. new federal of the old mines, and investigations by modern techniques might also the zone of interbedded carbonate rocks and shale buff- to rusty-weathering vitreous quartzite;.

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  • Chromite Deposits Of Kenai Peninsula, Alaska

    Chromite Deposits Of Kenai Peninsula, Alaska

    body, red mountain, alaska. alone, separated from the silicate gangue, show that it usually contains 54 to two areas of ultramafic rocks containing chromite deposits are known gray color, but weathered outcrops have a smooth reddish or yellowish mains of the old mill, built in 1918 to concentrate the ore.

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