 | | Journal (article/letter/editorial) | | Alaska LORNE E. YOUNGâ Consulting Geologist, 12015 North Fairwood Drive, Spokane, Washington 99218 Abstract...Abstract The Brooks Range is a 950-km-long north-vergent fold and thrust belt, which was formed during Mesozoic...extensional sags or half-grabens in the subsurface north of the Brooks Range. Climate, terrestrial ecosystems...physiographic elements (Fig. 1a), from south to north: the Yukon-Koyukuk borderlands, Brooks Range, and...Arctic foothills and Arctic coastal plain of the North Slope (Patton and Box, 1989; Grantz et al., 1990a) |  | | Journal (article/letter/editorial) | | oxide;5 = manganese carbonates, glauconite,pyrite + marcasite,phosphate,authigenicsilica,barite. Outer zone--deeper...marine:6a -- montmorillonite,glauconite,pyrite + marcasite,6b -- montmorillonite,pyrite, manganese carbonate...montmorillonite,6d = montmorillonite,glauconite,pyrite + marcasite,phosphate,organiccarbon,siderite. Glauconite...stratified arm of the gulf reachedwithin 20 km north of Imini. Manganeseis depletedin theseandthe other...mine, the upper CasonShalepinchesout toward the north(Fig. 19). Conformablyoverlying the upper unit of |  | | Journal (article/letter/editorial) | | of the deposit (210 to almost 350 m) than to the north and south (maximum of 164 m). The mineralized zone...8 percent Zn and are dominated by pyrite and marcasite, banded sulfides that are usually found at the...sulfide zones: Zones of massive pyrite and/or marcasite (60% or more of the rock) are present in the Ikalukrok...or exist as infillings between earlier pyrite/marcasite grains. Carbonate veins and breccias commonly...sphalerite, galena, and iron sulfide (pyrite and marcasite). In some holes (e.g., DDH 806, 810), iron sulfide |  | De Jonghe, Alex, Hart, Malcolm B., Grimes, Stephen T., Mitlehner, Alex G., Price, Gregory D., Smart, Christopher W. (2011) Middle Eocene diatoms from Whitecliff Bay, Isle of Wight, England: stratigraphy and preservation. Proceedings of the Geologists' Association, 122 (3) 472-483 doi:10.1016/j.pgeola.2011.02.003 | Journal (article/letter/editorial) | | are well known in the Paleogene sediments of the North Sea Basin (see, for example, Hughes, 1981; King...Eetvelde and Dupuis, 2005), Belgium (King, 1990) and Germany (Bettenstaedt et al., 1962). Aside from the comment...is the equivalent of the Balder Formation in the North Sea Basin and the upper part of the Fur Formation...which also dominate ageequivalent strata in the North Sea Basin, Denmark and elsewhere (Mitlehner, 1994...described in detail by Bidgood et al. (1999) from the North Sea Basin. This record from the Middle Eocene of |  | Schardt, Christian, Garven, Grant, Kelley, Karen D., Leach, David L. (2008) Reactive flow models of the Anarraaq ZnâPbâAg deposit, Red Dog district, Alaska. Mineralium Deposita, 43 (7) 735-757 doi:10.1007/s00126-008-0193-3 | Journal (article/letter/editorial) | | and Economic Geology, RWTH Aachen, Aachen 52064, Germany e-mail: schardt@iml.rwth-aachen.de are primarily...Anchorage Lisburne HillsHerald Arch Thrust Belt North Slope Deformation Front De Long Mountains Lisburne...terrane Endicott Mountains allochthon Schist belt North Slope foreland basin Ruby terrane Picnic Creek...2004). Two tectonic events influenced the north-central and north-western Brooks Range: Mississippian extension...deposits contain sphalerite, galena, pyrite, and/or marcasite; syn- and post-ore quartz can be found as a gangue |  | Morelli, R. M., Creaser, R. A., Selby, D., Kelley, K. D., Leach, D. L., King, A. R. (2004) Re-Os Sulfide Geochronology of the Red Dog Sediment-Hosted Zn-Pb-Ag Deposit, Brooks Range, Alaska. Economic Geology, 99 (7) 1569-1576 doi:10.2113/gsecongeo.99.7.1569 | Journal (article/letter/editorial) | | present in the Red Dog mine areaâfrom south to northâthe Qanaiyaq, Main, Aqqaluk, and Paalaaq deposits...orebodies become successively deeper from south to north. The Main deposit is the highest grade of the four...strata-bound lens; sphalerite, galena, and pyrite or marcasite are the dominant sulfide minerals present. The...variations and geochemical zoning from south to north between deposits, Kelley et al. (2004) suggest that...common sulfide mineral; galena and pyrite or marcasite are present in lesser amounts. The sulfide veins |  | Kelley, K. D., Wilkinson, J. J., Chapman, J. B., Crowther, H. L., Weiss, D. J. (2009) ZINC ISOTOPES IN SPHALERITE FROM BASE METAL DEPOSITS IN THE RED DOG DISTRICT, NORTHERN ALASKA. Economic Geology, 104 (6) 767-773 doi:10.2113/gsecongeo.104.6.767 | Journal (article/letter/editorial) | | trend of increasing ÎŽ66Zn values from south to north (Main-Aqqaluk-Paalaaq-Anarraaq). The ÎŽ66Zn values...deposits contain sphalerite, galena, pyrite, and marcasite, with rare chalcopyrite. Paragenetic studies of...mineral is sphalerite with lesser galena, pyrite, marcasite, chalcopyrite, and trace boulangerite; quartz...increasing ÎŽ66ZnJMC3-0749L values from south to north (Fig. 3B). Comparison of the Zn isotope results...shale-hosted massive sulfide deposits are from south to north, the Qanaiyak, Main, Aqqaluk, and Paalaaq deposits |  | Crowe, Douglas E., Nelson, Steven W., Brown, Philip E., Shanks, Wayne C., Valley, John W. (1992) Geology and geochemistry of volcanogenic massive sulfide deposits and related igneous rocks, Prince William Sound, south-central Alaska. Economic Geology, 87 (7) 1722-1746 doi:10.2113/gsecongeo.87.7.1722 | Journal (article/letter/editorial) | | nitc,arsenopyrite, tetrahedrite,andsecondary marcasite. Silicategangueis comprised predominantly of quartzand...massivesulfidedeposit,and Plafker et al., 1985; Blome et al., 1990). Both the morerecently,Crowe et al...Open-FileRept. OF 89-345, 22 p. VOL., p. 485-627. Blome,C. D., Nelson,S. W., and Karl, S. M., 1990, Accretionary...mineralresources of Alaska,reportonprogress Nelson,S. W., Blome, C. D., Harris, A. H., Reed, K. M., andWilson,F...character,and analysesof tectonostrati- Nelson, S. W., Blome, C. D., and Karl, S. M., 1987a, Late Triassic and |  | Slack, J. F., Kelley, K. D., Anderson, V. M., Clark, J. L., Ayuso, R. A. (2004) Multistage Hydrothermal Silicification and Fe-Tl-As-Sb-Ge-REE Enrichment in the Red Dog Zn-Pb-Ag District, Northern Alaska: Geochemistry, Origin, and Exploration Applications. Economic Geology, 99 (7) 1481-1508 doi:10.2113/gsecongeo.99.7.1481 | Journal (article/letter/editorial) | | Hilltop) to the south and Aqqaluk and Paalaaq to the north (Fig. 2). Throughout this paper, the term âRed Dog...1990; Pigage, 1990), the Rammelsberg deposit in Germany (Brockamp and Renner, 1988; Sperling and Walcher...sphalerite, galena, and lesser iron sulfides (pyrite ± marcasite) within a quartz- or barite-rich gangue (Moore...zoned redbrown sphalerite, minor galena, pyrite ± marcasite, and quartz, together with generally sparse barite...788 (not shown) is from the Suds prospect 10 km north of the Main deposit. The Qanaiyaq deposit (not shown) |  | Kelley, K. D., Leach, D. L., Johnson, C. A., Clark, J. L., Fayek, M., Slack, J. F., Anderson, V. M., Ayuso, R. A., Ridley, W. I. (2004) Textural, Compositional, and Sulfur Isotope Variations of Sulfide Minerals in the Red Dog Zn-Pb-Ag Deposits, Brooks Range, Alaska: Implications for Ore Formation. Economic Geology, 99 (7) 1509-1532 doi:10.2113/gsecongeo.99.7.1509 | Journal (article/letter/editorial) | | assemblage of barite, sphalerite, galena, pyrite, and marcasite. The textures of the ores are varied, however...(informally called the schist belt), whereas in the north (foothills of the Brooks Range where Red Dog is...Qanaiyaq to Paalaaq showing deepening from south to north owing to Brookian thrusting (modified from Jennings...RED DOG DEPOSITS greater depths from south to north (Fig. 2). The degree of deformation and faulting...sulfide-bearing barite. The veins are steeply dipping, trend north-northeast (Moore et al., 1986), and vary in width |  | Leach, David L., Marsh, Erin, Emsbo, Poul, Rombach, Cameron S., Kelley, Karen D., Anthony, Mike (2004) Nature of Hydrothermal Fluids at the Shale-Hosted Red Dog Zn-Pb-Ag Deposits, Brooks Range, Alaska. Economic Geology, 99 (7) 1449-1480 doi:10.2113/gsecongeo.99.7.1449 | Journal (article/letter/editorial) | | rapid cooling and kilometer-scale erosion of the north-central flank of the Brooks Range was associated...The veins are mostly steeply dipping and trend north-northeast, parallel to the long axis of the deposits...most common minerals in the veins are pyrite, marcasite, galena, and quartz with minor barite and calcite...in width from Mineral Stage I Barite Pyrite/Marcasite Galena Early Brown Sphalerite (EBS) Yellow-brown...allochthons (including the Devonian rocks) in and north of the central Brooks Range was at least 8 km and |  | | Journal (article/letter/editorial) | | deposits includes sphalerite, galena, pyrite and/or marcasite. Barite is abundant in the four deposits at Red...analysis of gravity anomalies, and drill indications north of the Main deposit resulted in the discovery of...progressively deeper beneath surface from south to north as a result of thrust stacking during the Brookian...gravity surveys were concentrated in an area 10 km north of the mine where streamsediment sampling in the...2001 season (DDH1114; also called Aktigoruk), 3 km north of Anarraaq, that intercepted 24 m at a grade of |  | Johnson, C. A., Dumoulin, J. A., Burruss, R. A., Slack, J. F. (2015) Depositional Conditions for the Kuna Formation, Red Dog Zn-Pb-Ag-Barite District, Alaska, Inferred from Isotopic and Chemical Proxies. Economic Geology, 110 (5) 1143-1156 doi:10.2113/econgeo.110.5.1143 | Journal (article/letter/editorial) | | feature that existed on the continental margin of North America from late Early to Late Mississippian (Osagean-Chesterian)...sulfur-rich oils found in wells drilled on the North Slope of Alaska (Lillis et al., 2006). The Kuna...Dog district ore contains 15% Fe as pyrite or marcasite), in contrast with molybdenum, which was a minor...Geology, p. 141â166. Dumoulin, J.A., Harris, A.G., Blome, C.D., and Young, L.E., 2004, Depositional settings...and Magoon, L.B., 2006, Oil types of the Alaskan North Slopeâa progress report: Geological Society of America |  | | Journal (article/letter/editorial) | | direction of regional tectonic transport. Local north to north-northeast transport of thrust sheets is interpreted...Brooks Range, approximately 135 km north of Kotzebue and 1,000 km north of Anchorage (Figs. 1 and 2). Abundant...approximately 1,000 km north of the presentday convergent plate margin between the North American plate and...the subducting Pacific plate (Fig. 1). It lies north of a series of terranes that were accreted during...Fig. 1). The Brooks Range is bounded to the north by the North Slope foreland basin (Colville basin) and |  | | Journal (article/letter/editorial) | | Mountains of northwestern Alaska, approximately 135 km north of Kotzebue (Fig. 1). They consist of ZnPb-Ag (±...159o 100 Km 156o 153o Barrow Beaufort Sea North Slope Chukchi Sea o 69 Figure 2 De Lo ng Mts...Spanning northern Alaska, the Brooks Range is a north-directed fold and thrust belt consisting of a thin...(Angayucham terrane) and folded sedimentary rocks in the north (Arctic Alaska terrane) that has had a long, episodic...and metamorphic grade generally decreases to the north from high-pressureâlow-temperature blueschist facies |  | Ayuso, Robert A., Karl, Susan M., Slack, John F., Haeussler, Peter J., Bittenbender, Peter E., Wandless, Gregory A., Colvin, Anna (2005) Oceanic Pb-isotopic sources of proterozoic and paleozoic volcanogenic massive sulfide deposits on Prince of Wales Island and vicinity, southeastern Alaska. Professional Paper Vol. 1732 (1732e) US Geological Survey doi:10.3133/pp1732e | Report (issue) | | and oceanic terranes that were accreted to the North American craton from Late Cambrian through Middle...this terrane to the evolution of the west flank of North America (Gehrels and others, 1996). Transportation...through Early Cretaceous along the western margin of North America (Monger and others, 1982; Gehrels and others...Lake; HZ, Hozer; KI, Keete Inlet; KIN, Keete Inlet North; KY, Khayyam; LO, Lookout Mountain; LP, Lime Point...NB, Nichols Bay; NKM, Nutkwa Main; NKN, Nutkwa North; NL, Niblack; RL, Rock Lake; RTF, Ruby Tuesday (Fish |  | | Journal (issue) | | Upper Permian spore-pollen assemblages from the north of the Russian Platform. âNaukaâ Press, Leningrad...uplift, or by Lower CretaceoLis deposits in che north and west. In some parts of the Kacha uplift, the...crinoids occim and in the flysch of rhe Perropavlovsk quarry, bivalve molluslcs of Toarcian-lower Rajocian Ăąge...arc separated front ihc North Crimean covĂšr units (Jurassic-Eocene) by ihc north dipping Eskiorda unit...the Kacha uplift (nor(hern pan of the core) and north of ir, but it aiso Occurs ovenhru.si above the Taurida |  | | Report (issue) | | Geological Survey editorial standards or with the North American Stratigraphic Code. Any use of trade, product...biotite-rich clinopyroxenite body near Butte Creek, on the North Fork of the Fortymile River is interpreted as an...or upper mantle-derived igneous rocks, located north of the Denali fault system, in the Mt. Hayes quadrangle...the south of the delineated province, and hi the north-central Yukon-Koyukuk Basin, platinum and cassiterite...underlies the area immediately to the east and north of this occurrence. Epithermal manganese occurrences |  | Nokleberg, Warren J., Bundtzen, Thomas K., Dawson, Kenneth M., Eremin, Roman A., Goryachev, Nikolai A., Koch, Richard D., Ratkin, Vladimir V., Rozenblum, Ilya S., Shpikerman, Vladimir I., Frolov, Yuri F., Gorodinsky, Mary E., Melnikov, Vladimir D., Ognyanov, Nikolai V., Petrachenko, Eugene D., Pozdeev, Anany I., Ross, Katherina V., Wood, Douglas H., Grybeck, Donald, Khanchuk, Alexander I., Kovbas, Lidiya I., Nekrasov, Ivan Ya., Sidorov, Anatoly A. (1996) Significant metalliferous and selected non-metalliferous lode deposits and placer districts for the Russian Far East, Alaska, and the Canadian Cordillera. Open-File Report Vol. 1996 (96-513) US Geological Survey doi:10.3133/ofr96513a | Report (issue) | | Geological Survey editorial standards or with the North American Stratigraphic Code. Any use of trade, firm...tectonostratigraphic terrane map of the Circum-North Pacific (Nokleberg and others. 1994c). A companion...pyrite, chalcopyrite, sphalerite, and lesser marcasite and pyrrhotite. The sulfides occur in pillow basalt...minerals commonly include stibnite, pyrite. and marcasite. with subordinate or rare arsenopyrite, hematite...consists of cinnabar, antimony, pyrite. and minor marcasite and native mercury in veins and in disseminations |  | | Journal (article/letter/editorial) | | significant VMS deposit in Alaska and the largest in North America, respectively. The occurrences are hosted...Valu Fa Ridge to the Taupo volcanic zone of the North Island, New Zealand. 1997, 1999; Newberry et al...15 = Hamilton Island, 16 = North Shore, 17 = Cave Mountain Point, 18 = North Gambier, 19 = Yellow Bear...Goodfellow et al., 1993) genetic models. From south to north, they occur from the islands west of Ketchikan (Fig...Alexander Triassic metallogenic belt. From south to north, a distinct variation in host rock lithology is |  | Slack, John F., Shanks, Wayne C., Karl, Susan M., Gemery, Pamela A., Bittenbender, Peter E., Ridley, W. Ian (2007) Geochemical and Sulfur-Isotopic Signatures of Volcanogenic Massive Sulfide Deposits on Prince of Wales Island and Vicinity, Southeastern Alaska. Professional Paper Vol. 1732 (1732c) US Geological Survey doi:10.3133/pp1732c | Report (issue) | | discontinuously from northwest of Haines in the north to Prince of Wales Island in the south (Newberry...Lake; HZ, Hozer; KI, Keete Inlet; KIN, Keete Inlet North; KY, Khayyam; LO, Lookout Mountain; LP, Lime Point...NB, Nichols Bay; NKM, Nutkwa Main; NKN, Nutkwa North; NL, Niblack; RL, Rock Lake; RTF, Ruby Tuesday (Fish...record transform faulting between the Pacific and North American Plates, after Jurassic through Cretaceous...deposit (NL, fig. 1), in the Moira Sound unit on the north side of Moira Sound, was mined from 1902 to 1908 |  | | Report (volume) | | understanding of mineral-resource distribution in North America was a goal of early explorers who came to...is dominant; in others, for example Meggen in Germany and Ballynoe in Ireland, barite is peripheral or...precipitation of calcium carbonate from solution (Blome and Albert, 1985) and the precipitation of barium...oceanography, v. 3: New York, Pergamon Press, p. 7-22. Blome, C.D., and Albert, N.R., 1985, Carbonate concretionsAn...high-grade shallow-marine manganese deposits in North America, in Shanks, W.C., III, ed., Cameron volume |  | | Report (volume) | | Atigun Syncline and Slope Mountain Areas, Alaskan North Slope Christopher J. Schenk and Kenneth J. Bird...headings, span nearly the entire State from the North Slope to southwestern, south-central, and southeastern...stratigraphic section in the central part of the North Slope into depositional sequences. Aleinikoff and...in text) Boundary between Arctic Coastal Plain (north) and Arctic Foothills (south) Figure 1. Distribution...about 2 m above the adjacent land surface. The north arm of the parabolic dune is as much as 3 m thick |  | | Book | | mineral explorer employed by the Chartered Company of North Borneo. He met a tragic death while hunting along...advanced before that of Sarawak and Sabah (then North Borneo). The international border between Kalimantan...introduced the term 'Engkilili Beds'. 2 Geology of North-West Borneo The oil company era In 1948, the Shell...compile a comprehensive report on the geology of North Borneo. The publication (Reinhard and Wenk, 1951)...compilation of the geology of Sarawak, Brunei and part of North Borneo, under the senior authorship of R Liechti |  | | Book (volume) | | THE GEOLOGY OF ALASKA The Geology of North America 'll L *âą / ^ X, ^x /yj 5*? ^^vrA. j /X XxT &...r'xtf) / ~l Jr ^0 âą ' -â-â The Geology of North America Volume G-l The Geology of Alaska Edited... one of the synthesis volumes of The Decade of North American Geology Project series, has been made possible...agencies through contributions to the Decade of North American Geology fund of the Geological Society...Plafker and Henry C. Berg, p. cm. â (The Geology of North America; v. G-l) Includes bibliographical references |
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