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| Richter, 1966, ADGGS GR21, Fig. 5: mine symbol on lower Ahtell Cr with no number; 2 miles above confluence...minerals: Geologic description: Auriferous gravel at lower end of canyon. Only small amount of gravel present...minerals: Malachite, azurite Gangue minerals: Geologic description: Zone of strong malachite and azurite...description and accuracy: Best location: Richter and Schmoll, 1973, USGS GQ 1062 loc. 1. Accurate within 100...Richter, 1971, USGS OF 473, p. 10; Richter and Schmoll, 1973, USGS GQ1062, loc. 1; Richter and others |
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| accuracy: This prospect is on the ridge west of lower Stratton Creek. It is at an elevation of about 4...Commodities: Main: Cu Other: Ore minerals: Azurite, malachite Gangue minerals: Geologic description: Amygdaloidal...Greenstone is heavily stained with azurite and malachite at this location. Copper mineralization is locally...placer mine is on Willow Creek, a north tributary to lower Ahtell Creek. It is at an elevation of about 2,700...River Meridian. This is locality 1 of Richter and Schmoll (1973), locality 5 of Richter and others (1975) |
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| ounces (17.7 million grams) from the Willow Creek district between 1909 and 1950; production continued into...into the 1980's. The Willow Creek mining district contributed substantially to the development of south-central...come from the Wishbone Hill district; between 1916 and 1952 the district produced 3,284,723 short tons...and Nelchina Rivers, scale 1:63,360. Yehle and Schmoll (1987a, b, 1988,1989) Surficial geologic maps...Cook Inlet. The Municipality is bounded by lower Knik Arm, lower Turnagain Arm, and the Chugach Mountains |
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| Salzburg Hellbrunnerstr. 34lIII 5020 Salzburg Austria P.A. FLOYD Department of Geology University of...Salzburg Hellbrunnerstr. 34/III 5020 Salzburg Austria H.J. FRANZKE Geologisches Institut Leibnizstr...Graz Austria G. FUCHS Geologische Bundesanstalt Wien Rasumowsky-Gasse 23 - 25 1030Wien Austria P. ...Salzburg Hellbrunnerstrasse 34lIII 5020 Salzburg Austria H. KREUZER Bundesanstalt fUr Geowissenschaften...Geologie und Palaontologie Heinrichstr. 26 8010 Graz Austria Z. MisAR Department of Geology Charles University |
 | Price, J. B., Hitzman, M. W., Nelson, E. P., Humphrey, J. D., Johnson, C. A. (2014) Wall-Rock Alteration, Structural Control, and Stable Isotope Systematics of the High-Grade Copper Orebodies of the Kennecott District, Alaska. Economic Geology, 109 (3) 581-620 doi:10.2113/econgeo.109.3.581 | Journal (article/letter/editorial) |
| the High-Grade Copper Orebodies of the Kennecott District, Alaska Jason B. Price,†,1,* Murray W. Hitzman...Denver, Colorado 80225 Abstract The Kennecott district, Alaska, contained three important copper-(silver).../yarrowite) that probably precipitated at even lower temperatures. Wall-rock alteration includes premineral...from dissolution of diagenetic pyrite found in the lower Chitistone Limestone. Field and isotopic data support...Introduction The Cu-(Ag) ore deposits of the Kennecott district in the Wrangell-St. Elias National Park of eastern-southern |
 | Amstutz, G. C., Goresy, A. El, Frenzel, G., Kluth, C., Moh, G., Wauschkuhn, A., Zimmermann, R.A. - Eds. (1982) Ore Genesis. Springer Berlin, Heidelberg. doi:10.1007/978-3-642-68344-2 | Book |
| Alteration and Mineralization in the Tri-State District of Missouri, Kansas, and Oklahoma, U.S.A. R.D...the Myrthengraben Gypsum Deposit, Semmering, Lower Austria W. Tufar (With 13 Figures) . . . . . . . . ...Emphasis on the Bavarian Pfahl of the Altrandsberg District) H.-W. Biiltemann and R. Hofmann (With 9 Figures)...Hydrothermal Ore Formation, Ticapampa-Aija Mining District, Cordillera Negra, Department of Ancash, Peru...sulphides was observed in the grey sandstone of Lower Permian, SW Poland. The process is connected with |
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| New ages of radiolarian chert from the Rampart district, east-central Alaska, by David L. Jones, Norman...nonmineralized quartz veins in the Port Valdez gold district, Valdez quadrangle, southern Alaska, by William...• . Progress in lead/uranium zircon studies of lower Paleozoic rocks of the southern Alexander terrane...• • • • • • • • • Geologic map of the Rampart district, showing locations of d a t e d r ad i o 1 a r...Generalized geologic map of the Port Valdez gold district, showing approximate locations of individual mines |
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| possibly underlain by continental crust Devonian to Lower Jurassic oceanic rocks and ophiolite Mesozoic and...topography, and nourished ice tongues that extended into lower lying areas to the north and south. Fission-track...Bering Sea, 19 in the Gulf of Alaska, and 9 in lower Cook Inlet and Shelikof Strait. Since the late 1980s...areas. In 1971 core drilling on the ocean floor and lower conti¬ nental slope at 5 sites off Kodiak Island...Chukchi Shelf, are now buried by a thick middle Lower Cretaceous to Holocene progradational continental |
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| surface geology. Prospective structures in the Lower Devonian Oriskany Sandstone or in older strata can...andesitic volcanic rocks present on the structurally lower east side of the pluton are both ash falls and lava...magnetic features over the Upper Cretaceous and lower Tertiary strata, and high amplitude, steep-gradient...in an area 20 to 40 km north of the Heddleston district in the Choteau 1° x2° quadrangle, Montana. The...placers in the Circle district, Alaska The source of gold in the Circle district is not immediately clear |
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| surface geology. Prospective structures in the Lower Devonian Oriskany Sandstone or in older strata can...andesitic volcanic rocks present on the structurally lower east side of the pluton are both ash falls and lava...magnetic features over the Upper Cretaceous and lower Tertiary strata, and high amplitude, steep-gradient...in an area 20 to 40 km north of the Heddleston district in the Choteau 1° x2° quadrangle, Montana. The...placers in the Circle district, Alaska The source of gold in the Circle district is not immediately clear |
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| _____ District and regional studies._________________ Iron deposits in the Birmingham district, Alab...metals and industrial minerals ______________ District studies.____________________________ Beryllium...Montana.___________ Potash deposits in the Carlsbad district, New Mexico _________________________ Saline minerals...Radioactive materials_____-____---_-_----------District and regional studies_______---_--_-__ Colorado...Kentucky ____________ Quaternary geology of the lower Ohio River valley.__________________________________ |
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| ......................................... 195 Lower Mississippian (Kinderhookian) biostratigraphy and............................. 221 Kinderhookian (Lower Mississippian) calcareous rocks of the Howard Pass...valley adjacent to the Hi-Yu mine in the Fairbanks district had a pH of 5.2. Near Juneau, processing of ore...same site was only 490 ppb. Within the Fairbanks district, maximum dissolved-arsenic levels of 260270 ppb...past gold districts the Willow Creek district, the Fairbanks district, and the Juneau gold belt (fig. IA) |
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| quadrangle, western Brooks Range. Proterozoic(?) and lower Paleozoic carbonate rocks are exposed in the background.................. 31 Depositional Sequences in Lower Cretaceous Rocks, Atigun Syncline and Slope Mountain...Early Cenozoic Depositional Systems, Wishbone Hill District, Matanuska Coal Field, Alaska Romeo M. Flores...and Bird propose a preliminary division of the Lower Cretaceous stratigraphic section in the central...the dune (fig. 4 ). A sample of humus from the lower 15 em of this paleosol yielded a radiocarbon age |
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| into (a) district and regional studies and (b) commodity and topical studies. The district and regional...find that magnetic anomalies in the Marquette district are related to four groups of rocks: (1) prominent...important new ore deposits near the Ely mining district. Geologic mapping revealed structural irregularities...mineralization in southeastern Arizona. In the 7th district, at Bisbee, a granitic rock was dated at about...previously reported (Kinkel,l-62). In the Pima copper district, Arizona, large-scale mapping by J. R. Cooper |
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| area are chalcopyrite, arsenopyrite, pyrite, malachite, scheelite, and powellite. D. E. Detra and R....Areas indicates that favorable areas are in the lower plate of the Snake Range decollement and that rocks...mineral resource appraisals of the Hells Hole and Lower San Francisco Wilderness Study Areas^ (RARE II)...The main target for mineral exploration in the Lower San Francisco area is the partially exhumed 26 to...identification of two distinct sequences of rock. The lower sequence is a sulfide-bearing intrusive composed |
 | | Report (volume) |
| area are chalcopyrite, arsenopyrite, pyrite, malachite, scheelite, and powellite. D. E. Detra and R....Areas indicates that favorable areas are in the lower plate of the Snake Range decollement and that rocks...mineral resource appraisals of the Hells Hole and Lower San Francisco Wilderness Study Areas^ (RARE II)...The main target for mineral exploration in the Lower San Francisco area is the partially exhumed 26 to...identification of two distinct sequences of rock. The lower sequence is a sulfide-bearing intrusive composed |
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| Regional offices ________________________ _ 259 District offices _________________________ _ 259 Offices...province Bodie district, Oalifornia.-Detailed geochronologic studies in the Bodie district, Mono County...K-Ar method used. Goldfield district, Nevada.-The main Inining district at Goldfield, in Esmeralda and...mesothermal episode of base metal enrichment. Tenmile district, Nevada.- Gold-quartz-adularia veins occur in...Tertiary granodiorite intrusive in the Tenmile district near Winnemucca, Humboldt County, Nev. Fluid-inclusion |
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| onal offices _________________ --- _ Area and district offices ------------Earth Resources Observation...--------------Regional offices -------------------District offices ---------------------Offices in other...METALS Age of mineralization in the Creede mining district of Colorado M.A. Lanphere, P. M. Bethke, P. B...the age of mineralization in the Creede mining district of Colorado. Potassium-argon measurements on vein...Latite, the youngest volcanic unit exposed in the district, was previously determined by Steven, H. H. Mehnert |
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| ________________ 217 Regional offices _---- _-- ---_- _-_217 District offices__-___----___-_-__ ____ 217 Offices in...Cortez occurs in a window of carbonate rock in the lower plate of the Roberts Mourtains thrust fault. Detailed...Silurian Roberts Mountains Limestone and (or) the lower part of the Devonian Wenban Limestone, have been...elsewhere in the 17-sq-mi altered area within the district may therefore be clues to concealed ore deposits...Wrucke and T. J. Armbrustmacher have shown that the lower plate of the Roberts Mountains thrust lies at an |
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| Regional offices ........................... . District offices ......................•...... Offices...from five active mines in the east Tennessee zinc district and from many Al A2 RESOURCES INVESTIGATIONS...zinc deposits in the upper Mississippi Valley district A. V. Heyl and W. S. West report that carbonate...sagging of dolomite strata seen elsewhere in the district are imperceptible east of Mineral Point. In places...been previously reported from the district. Certain beds in the lower and middle parts of the Galena Dolomite |
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| effet colorer les en a sont: série une malachite, plomb phosphaté de chrome minéraux le chlorure...2 ... 2 CuSi2 Dioptase — CuSi 16 + Aq Malachite Cuivre Arsenic. + FeS + FeS + Aq + 3Cu ...à caractérise Borrowdale, faibles grande district de une On l’anthracite, altération des une...quelques ; le de minerai et de Supérieur. La malachite a ou très-impor- la Sibérie. Enfin les Cobija...filon de chlorite et 0 au delà; ,60 et district veines de sorte que des natif, fourni la |
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| _ Heavy metals_______________________________ District and regional studies________________ Michigan...____________________________ Manganiferous zone of the Butte district, Montana___________________________ Manganese..._ Pima copper district, Arizona__________ Upper Mississippi Valley zinc-lead district. _ East Tintic...Tintic silver-lead district, Utah. ______ Coeur d'Alene lead-zinc-silver district, Idaho______________________________...metals and industrial minerals._______________ District and regional studies._________________ Mount Wheeler |
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| intrusions have been found only in the Triassic-Lower Jurassic rifted terrane of the northern Cordillera...Peru, Bolivia, and Chile unconformably overlying lower those aspects of the regional geology of the Andean...the Andean copper belt are smaller and contain a lower copper grade than are found for deposits within...MIO-PLIOCENE VOLCANIC ROCKS Ku- UPPER Km- MIDDLE - LOWER CRETACEOUS SHALE CRETACEOUS CRETACEOUS LIMESTONE...existence in Chile of Permian (228 to 261 m.y.) and lower Meso- zoic (177 to 191 m.y.) granodioritic batholithic |
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| und Energiewirtschaft. Montan-Verlag. Vienna, Austria. Montana Acad. Sci. Proc. - Proceedings of the...Petrographische Mitteilungen. Springer-Verlag. Vienna, Austria, and New York, N.Y. Tulane Studies Geology- Tulane...the stratigraphy and structure of the Goldfield district, Esmeralda and Nye Counties, Nevada [abs.]: Geol...Simpson, Lloyd W.; Durham, C. 0., Jr. (leaders). Lower Mississippi Valley, Baton Rouge to Vicksburg-1st...08599 Amsbury, David L. Caliche soil profiles in Lower Cretaceous rocks of central Texas [abs. ]: Geol |
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| part of the Upper Mississippi Valley zinc-lead district by A. V. Heyl and E. R. King suggests that Paleozoic...metasedimentary rocks is in the southern part of the district. The magnetic data indicate the presence of major...mined elsewhere in the Upper Mississippi Valley district possibly are also present in this area. Almost...copper mineralization in Arizona In the Pima district, Pima County, Ariz., geologic mapping of ore zones...porphyry is not known elsewhere in this part of the district, but the sedimentary rocks that it intrudes crop |
Schmoll quarry, Bernhards, Kottes-Purk, Zwettl District, Lower Austria, Austria