 | | Journal (article/letter/editorial) | | (Stettner, 1975), palynological evidence suggests a Lower Devonian protolith age for at least some of the...r on biotite; Kreuzer et al. 1990) and through Lower Permian acid volcanics (see Emmert, 1981). The latter...resulting genetic fault populations were plotted on a lower hemisphere Schmidt net according to the method of...hornfelses; Dfirrer Schlag quarry) and b ZEV (amphibolites, Rupprecht quarry); equal-area lower hemisphere projection...with white dots) is mineralized with chlorite, laumontite and calcite Pr F = (S ]sin ~1)/N Wr where |  | | Journal (article/letter/editorial) | | water. Re-equilibration of crack-filling calcite to lower temperatures means that calcite chemistry tells...mineralized by calcite + quartz If: actinolite f laumontite + prehnite f epidote. Shear zones in the gneisses...for actinolite-bearing assemblages to 150°C for laumontite-bearing assemblages. Fluid-inclusion trapping...and j). Where crack-filling calcite occurs with laumontite or prehnite, calcite usually is near the middle...indicates that calcite post-dates coexisting laumontite and prehnite (Fig. 2f and 1). In many samples |  | | Report (volume) | | surficial deposits are generalized from maps by H.R. Schmoll and Ernest Dobrovolny of the U.S. Geological Survey...TO STRATIGRAPHY is exposed from the Girdwood district north to the Knik River, "volcanic tuffs." They...(1916) observations, showed that, in the Girdwood district, the "volcanic tuffs" discordantly overlie Cretaceous...younger than and lithologically different from the Lower Jurassic Talkeetna Formation described by Barnes...as "slates and graywackes of the Kachemak Bay district." Examination of of outcrops of this unit along |  | | Report (issue) | | sedimentation, sabkha facies, diagenesis, and stratigraphy, lower part of the Chitistone Limestone The Triassic host...Slope: 823-B, p. B6-B8. Bartsch-Winkler, Susan, and Schmoll, H.R., 1984, Convoluted beds in late Holocene intertidal...Tatsumoto, Mitsunobu, 1977, Probable Precambrian or lower Paleozoic rocks in the Fairweather Range, Glacier...B.L., Carter, Claire, and Winkler, G.R., 1977, Lower Paleozoic graptolitic section in the Terra Gotta...1979, Serpentinite bodies in the Willow Creek district, southwestern Talkeetna Mountains, Alaska: 804-B |  | | Report (chapter) | | Fig. 2. Black graphite-enriched cataclasites (lower and central part of picture) in paragneiss. Between...cataclasites are pyrite and potash feldspar. Laumontite, frequently present in the younger brittle shear...as in Fig. 4. The arrow in the schematic sketch (lower part of the diagram) points at the investigated...slip plane. The arrow in the schematic sketch (lower part of the diagram) points at the investigated...Mitteilungen, 56, 641-647. VOLLBRECHT, A., WEBER, K. & SCHMOLL, J. 1989. Structural model for the SaxothuringianMoldanubian |  | | Report (issue) | | Hoare, J. M., Decker, John, 1983, Paleomagnetism of Lower Cretaceous tuffs from Yukon-Kuskokwim delta region... M., 1952, Analysis of the stratigraphy in the lower Kuskokwim region, Alaska (abs.): Geological Society...1332. ___, 1961a, Geology and tectonic setting of lower Kuskokwim-Bristol Bay region, Alaska: American Association...13 ___, 1961b, Preliminary geology along the lower Yukon River, Alaska: Geological Survey Open-file...Patton, W. W., Jr., 1964, Occurrence and origin of laumontite in Cretaceous sedimentary rocks in western Alaska |  | | Report (issue) | | Major Unconformity Between Upper Ordovician and Lower Devonian Strata in the Nanook Limestone, Shublik...Mineralization by Metamorphic Fluids in the Chandalar District, Southern Brooks Range--Fluid Inclusion and Oxygen-Isotopic...South-Central Alaska Donald H. Richter, Henry R. Schmoll, and Dana J. Bove 114 Hydrocarbon Source Potential...Photograph taken June 13, 1986. Turner Glacier in lower left corner; Gilbert Point and Russell Lake near...G., 1986, Velocity and surface altitude of the lower part of Hubbard Glacier, Alaska, August 1987: U |  | | Report (issue) | | HYDRAULIC ENGINEER-ALASKA PACIFIC Supervisor-K. W. Sax District Engineer-G. C. Giles Engineering Technician-J...Leeson I I I I District and Project Offices District and Project Offices District and Project Offices...Offices District and Project Offices FIGURE 4.-0rganization of the Water Resources Division. OFFICE OF...the Tacoma District Office, P.O. Box 1152, Tacoma, Wash. 98401, Gordon C. Giles, District Hydraulic Engineer...principally at scales of 1:250,000 and 1:63,360; mineral district mapping and evaluation; mineral reconnaissance; |  | | Journal (article/letter/editorial) | | within the Bohemian Massif. These units mostly show lower metamorphic grade and different P-T histories. The...higher contents of K2O, P2O5, La, Ce, Cr, Ni and lower contents of CaO and N2O. Unlike the above mentioned...facies field), strain partitioned into structurally lower unit (Micaschist Zone) and the whole nappe sequence...Laurussia (Baltica) collision in the Devonian to Lower Carboniferous. Variscan convergence, culminated...units (in Saxothuringicum and Moldanubicum): 8. lower part of allochthonous units consisting of weakly |  | | Report (issue) | | from Saddle Mountain in the Iniskin-Tuxedni area, lower Cook Inlet, Alaska, in Albert, N. R. D., and Hudson... 1981, Selected bibliographical entries on the lower Cook Inlet, Alaska: Alaska Division of Geological...Depositional history and seismic stratigraphy of Lower Cretaceous rocks, National Petroleum Reserve in...reservoir potential of the Fortress Mountain Formation (Lower Cretaceous), central North Slope, Alaska: U.S. Geological...lode gold deposits in the Hope-Sunrise mining district, northern Kenai Peninsula, Alaska, in Albert, |  | | Report (issue) | | 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 |  | | Report (issue) | | T. Dutro, Jr ___________9 Granitic clasts from Lower Cretaceous conglomerate in the northwestern Brooks...rocks of the Kamishak Hills-Douglas River area, lower Cook Inlet, by Leslie B. Magoon, Robert M. Egbert...sandstones in the Cape DouglasKamishak Hills area, lower Cook Inlet, by Stephen M. Lankford and Leslie B...mineralization and metamorphism in the Willow Creek mining district, southern Talkeetna Mountains, Alaska, by Miles..._________________65 Tectonic significance of newly discovered lower Paleozoic strata in the upper Chulitna Valley, south-central |  | 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 |  | Amstutz, G. C., Goresy, A. EI, Frenzel, G., Kluth, C., Moh, G., Wauschkuhn, A., Zimmermann, R.A. - Eds. (1982) Ore Genesis - The State of the Art - A Volume in Honour of Professor Paul Ramdohr on the Occasion of His 90th Birthday With Special Reference to His Main Scientific Interests - Special Publication of the Society for Geology Applied to Mineral Deposits No. 2. Springer Berlin Heidelberg. | 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 |  | | Report (issue) | | 147. Gold deposits in the French Gulch-Deadwood district, Shasta and Trinity Counties, California, by John...in primary metallization in the Central mining district, Grant County, New Mexico, by W. R. Jones, R....__ --------222. Ground-water conditions in the lower Tallaboa Valley, 'Puerto Rico, by I. G. Grossman...-------'---------------------224. Structure of Lower Taylor Glacier, South Victoria Land, Antarctica...hydrous strontium borate from the Kramer borate district, Ca.lifornia, by Richard C. Erd, Vincent Morgan |  | | Book (volume) | | 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 |  | 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 |  | | Report (issue) | | 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 |  | | Report (volume) | | 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 |  | | Report (volume) | | geochemistry of the McKinley Lake gold mining district, Chugach National Forest, Alaska T. P. Trainor...RESOURCES Organic matter and thermal maturation of lower Paleozoic rocks from the Nixon Fork subterrane of...each sample without preconcentration or dilution. Lower determination limits for most cations are at the...measurements for other elements were consistently below lower determination limits and thus are not included in... 17 18A 18B ~ Site Description D2 Mouth of lower adit, Duchess mine Base of tailings pile, Duchess |  | | Report (volume) | | Austrian Association of Speleologists]. Vienna, Austria. ICSU Rev.-International Council of s·cientific...Gold deJ:;:>sits in the French Gulch-Deadwood district, Shasta and Trinity Counties, California, Art...·Barclay; Meier, M. F.; Sharp, R. P. Structure of the lower Blue Glacier, Washington [abs.]: Internat. Assoc...Structure contour map of Colorado, in Symposium on lower and middle Paleozoic rocks of Colorado, 12th field...mudlumps-Pt. 2, Foraminifera ·of the mudlumps, Lower Mississippi River Delta: Louisiana Geol. Survey |  | | Report (issue) | | 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 |  | | Report (issue) | | ____________________ East Tintic silver-lead district, Utah_ _____ Central mining district, New Mexico._-___ Lead, zinc...Light metals and industrial minerals-_____________ District and regional studies-________________ Beryllium...George district, Colorado-.-. _ ________________________ Pegmatites of the Spruce Pine district, North...in South CarolinaFluorspar in the Browns Canyon district, Salida, Colorado._____________________ Phosphate...Radioactive materials. __________________________ District and regional studies.-______________ Colorado |  | | Report (issue) | | 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 |  | | Report (volume) | | .................. 143 Possible occurrence of lower to middle Paleozoic rocks south of the Denali fault...neutron activation; N(5), not detected at 5 ppm lower detection limit; average range in igneous rocks...conditions. The As anomaly and the coincident, albeit lower-level, Pb anomaly may reflect underlying base- or...mesothermal gold vein occurrences of the Nuka Bay mining district in Kenai Fjords National Park. Occurrences are...National Forests. GEOLOGIC SETTING The Nuka Bay gold district is located on the eastern side of the southern |
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