USGS Professional Paper 1697 - Alaska Resources Library

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28 Metallogenesis and Tectonics of the Russian Far East, <strong>Alaska</strong>, and the Canadian Cordillera a layer as much as 600 m thick that consists of alternating, weakly metamorphosed Cambrian dark gray jasper, schist, shale, spilite, basalt, and basaltic tuff that is interlayered with rare sandstone, siltstone, sedimentary breccia, limestone, and dolomite. The volcanogenic Mn deposits consist of partly metamorphosed, steeply dipping, lenticular and sheeted, bedded Mn bodies that occur in a diverse Lower Cambrian sequence of jasper, shale, schist, spilite, basalt, and basaltic tuff that overlays a carbonate reef complex with seamounts. The Fe and Mn deposits occur in long beds and lenses and are interpreted as forming during seafloor hydrothermal activity and associated with basaltic volcanism that was accompanied by chert deposition in seafloor depressions. The sedimentary P deposits are hosted in complex, steeply dipping and folded sequence of jasper and volcanic rocks, which represent a reef edifice. The deposits consist of carbonate beds that contain phosphorite-bearing breccia with Cambrian fossils. The sedimentary breccia is interpreted as forming in atoll fans and seamounts (Khanchuk, 1993). The Galam terrane consists of a complexly built accretionary prism with numerous regional-size olistoliths of early Paleozoic (Cambrian and Ordovician) marine basalt, chert, A Map 400 m 0 A B and clastic rocks (Khanchuk, 1993). The matrix consists of late Paleozoic turbidite and olistostrome. The early Paleozoic strata and overlying middle to late Paleozoic sedimentary rocks are interpreted as forming in a marine basin (Shkolnik, 1973; Khanchuk, 1993). Omulevka River Metallogenic Belt of Austrian Alps W and Kipushi Cu-Pb-Zn Deposits (Belt OR), Northwest Part of Russian Northeast The Omulevka River metallogenic belt of stratabound Austrian Alps W and Kipushi Cu-Pb-Zn deposits (fig. 2; tables 3, 4) occurs in the northwest part of the Russian Northeast (Shpikerman, 1998). The belt occurs between the Moma and Omulevka Rivers, and is hosted in the northeastern part of the Omulevka passive continental margin terrane of the Kolyma- Omolon superterrane (Nokleberg and others, 1994c, 1997c). The belt is greater than 300 km long and is as much as 100 km wide. The significant deposits are the Omulev stratabound Austrian Alps W deposit and the Vesnovka Kipushi Cu-Pb-Zn deposit (table 4) (Nokleberg and others 1997a,b, 1998). Cross Section 0 400 800 m B 400 m 0 Granodiorite (Early Cretaceous) Sedimentary rocks (Cambrian) Sandstone Interbedded sandstone, siltstone, and chert Chert Ore body Contact metamorphic (hornfels) zone Contact Figure 10. Gerbikanskoe volcanogenic Fe deposit, Galam metallogenic belt, Russian Southeast. Schematic geologic map and cross section. Adapted from Shkolnik (1973). See figure 2 and table 4 for location.
Omulev Austrian Alps W Deposit The Omulev Austrian Alps W deposit (fig. 11) (Shpikerman and others, 1986) consists of veinlets in Middle Ordovician black, carbonaceous, calcareous siltstone. The main ore mineral is scheelite with local pyrite, antimony realgar, orpiment, galena, and chalcopyrite. The ore minerals are restricted to a conformable, thin layer that is intricately folded along with adjacent sedimentary rocks. The ore minerals and sedimentary rocks exhibit greenschist-facies metamorphism. The deposit occurs in the core of a large, open, northwest-trending anticline and covers an area of about 100 km 2. The deposit is small and has an average grade of as much as 1 percent WO 3. 55 o Realgar Greek 40 o Lower band: Phyllite, schistose siltstone and argillite Upper band: Argillaceous limestone Lower band: Limestone, carboniferous argillaceous shale Upper band: Marl, phyllite Horizons with low-grade sulfide-scheelite Zone with high grade sheelite Contact Cambrian through Silurian Metallogenic Belts (570 to 408 Ma) 29 0 2 km Vesnovka Kipushi Cu-Pb-Zn Deposit The Vesnovka Kipushi Cu-Pb-Zn deposit (Shpikerman, 1998) consists of veinlets and disseminated sulfides in Middle Ordovician limestone, shale, and siltstone. The ore bodies trend east-west and form metasomatic replacements conformable to bedding. The chief ore minerals are sphalerite, galena, chalcopyrite, and renierite(?). The calcareous siltstone that hosts the ore bodies is silicified and cut by calcite veins. Local tuff beds in these formations suggest a volcanic island arc that occurred along the margin of an Early and Middle Ordovician continental-margin sedimentary basin (Bulgakova, 1986). 40 o Vo Fault 40 o lnistyi Greek Pionee e r Gr ek Krivun Formation (Middle Ordovician) 60 o Mokry Formation (Lower-Middle Ordovician) Strike and dip of bedding Figure 11. Omulev Austrian Alps W deposit, Omulevka River metallogenic belt, Russian Northeast. Schematic geologic map. Adapted from Shpikerman and others (1986). See figure 2 and table 4 for location.
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USGS Prepared in collaboration with
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U.S. Department of the Interior Gal
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iv Hart River SEDEX Zn-Cu-Ag Deposi
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vi Specific Events for Middle Throu
Page 9 and 10: viii Metallogenic Belts Formed Duri
Page 11 and 12: x Origin of and Tectonic Controls f
Page 13 and 14: xii Toodoggone Metallogenic Belt of
Page 15 and 16: xiv Slate Creek Serpentinite-Hosted
Page 17 and 18: xvi Left Omolon Belt of Porphyry Mo
Page 19 and 20: xviii Origin of and Tectonic Contro
Page 21 and 22: xx Chukotka Metallogenic Belt of Au
Page 23 and 24: xxii Plutonic Rocks Hosting East-Ce
Page 25 and 26: xxiv Skeena Metallogenic Belt of Po
Page 27 and 28: xxvi Bee Creek Porphyry Cu Deposit
Page 29 and 30: xxviii 36. Wellgreen gabbroic Ni-Cu
Page 31 and 32: xxx 87. Partizanskoe Pb-Zn skarn de
Page 33 and 34: Metallogenesis and Tectonics of the
Page 35 and 36: format (Nokleberg and others, 1996)
Page 37 and 38: logenesis of the region (1) subduct
Page 39 and 40: Subterrane—A fault-bounded unit w
Page 41 and 42: dilemma consists of two conflicting
Page 43 and 44: 2 to 20 m thick. A related dolomite
Page 45 and 46: Lantarsky-Dzhugdzhur Metallogenic B
Page 47 and 48: Origin of and Tectonic Controls for
Page 49 and 50: Metallogenic Belts Formed During Pr
Page 51 and 52: as at Oz, Monster, and Tart, may al
Page 53 and 54: Monashee Metallogenic Belt of Sedim
Page 55 and 56: Clark Range Metallogenic Belt of Se
Page 57 and 58: in addition to the Fe deposits. Min
Page 59: study) consists of lenses, from 100
Page 63 and 64: ock, including coarse clastic rock,
Page 65 and 66: lative metalliferous brines in a re
Page 67 and 68: Prince of Wales Island Metallogenic
Page 69 and 70: suite of deposits and host rocks ar
Page 71 and 72: margin of the North American Craton
Page 73 and 74: newly created terranes migrated int
Page 75 and 76: (Ryazantzeva and Shurko, 1992). The
Page 77 and 78: tonnes Au and an average grade of a
Page 79 and 80: mafic and felsic metavolcanic rocks
Page 81 and 82: intrusion from about 402 to 366 Ma
Page 85 and 86: mentary rocks of the Cambrian to De
Page 87 and 88: (Preto and Schiarizza, 1985; Schiar
Page 91 and 92: ate and clastic rocks and volcanicl
Page 93 and 94: (Nokleberg and others, 1994c, 1997c
Page 95 and 96: Berezovka River Metallogenic Belt o
Page 99 and 100: Finlayson Lake Metallogenic Belt of
Page 101 and 102: and barite in siliceous black turbi
Page 103 and 104: Windermere Creek (Western Gypsum) C
Page 105 and 106: (NX, DL, MY), Viliga (VL), and Zolo
Page 107 and 108: South of the main east-west-trendin
Page 109 and 110: ated subduction zone in the Wrangel
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icite-biotite-quartz bodies in frac
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Canada Cordillera. The granitoid ro
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Viliga (VL) passive continental-mar
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32; tables 3, 4) occurs along the n
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superterrane, consists mainly of ma
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ers, 1994c, 1997c). In southern Bri
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mental volcanic rocks of intermedia
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a resource of 34.3 million tonnes o
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potassic zone. Combined estimated p
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and quartz monzodiorite stock and s
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and Omolon (OM) cratonal terranes,
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in volcanic and volcaniclastic rock
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minor calcite, and sporadic pyrite
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supergene blanket are interpreted a
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deposits and occurrences consist of
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onto the Omulevka terrane to form t
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superterrane. This belt is interpre
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to form along the leading edge of t
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quartz, and is virtually not associ
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deposits are at Terrassnoe and Kuna
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Peschanka Porphyry Cu-Mo Deposit Th
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The belt is hosted in the Late Jura
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in a island arc that was tectonical
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and Early Cretaceous Koyukuk island
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The deposit consists of disseminate
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The Orange Hill deposit contains an
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49; tables 3, 4) (Foley and others,
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locally Late Triassic marine volcan
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gold in a gangue of quartz, calcite
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Verkhoyansk granite belt, which int
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metallogenic belts are interpreted
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assemblages, which may have been mo
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during hypogene and supergene alter
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collision and regional thrusting, t
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Yur Au Quartz Vein Deposit The smal
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phase has a Rb-Sr isotopic age of 1
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sian Northeast. The belt is hosted
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Host Granitoid Rocks and Associated
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that are up to 600-1,500 m long, av
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Metallogenic Belts Formed During La
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y partly coeval plutons that range
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tion is interpreted as occuring by
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the Badzhal-Ezop and Khingan parts
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and comagmatic with volcanic rocks;
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as interpreted for the Rock Creek d
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source (Yeo, 1992). The Blow River
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2000). The spatial location of the
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to the east in the central Yukon Te
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occur in a 30-km-long belt along ir
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The Emerald deposit has produced ap
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Metallogenic-Tectonic Model for Ear
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cham oceans were closed, and the Ch
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greisenized Mesozoic granite that i
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composition magmatic bodies (with a
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Origin of and Tectonic Controls for
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to Albian pelecypods (Nokleberg and
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quartz-arsenopyrite-pyrrhotite, pol
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thermally altered to siliceous and
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These ore bodies are as much as 1 m
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Eastern Asia-Arctic Metallogenic Be
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Demin, and Krasilnikov, 1974; Nekra
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10 percent Cu, as much as 0.92 perc
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pyrite, pyrite, galena, sphalerite,
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content decreases with depth, as do
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azdelnoye, (2) porphyry Sn deposits
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Karalveem Au Quartz Vein Deposit Th
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Democrat (Mitchell Lode) Granitoid-
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with high-temperature and high-pres
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chalcocite and covellite and also h
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cum-North Pacific, (2) completion o
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(6) In the Paleocene (about 56 to 6
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sists of cinnabar and metacinnabari
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Eastern Asia-Arctic Metallogenic Be
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groups of deposits are interpreted
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Indian Mountain and Purcell Mountai
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and southeastern Alaska (Moll and P
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Nokleberg and others, 1995a; Bundtz
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g/t Au or 368.2 Au gold. The deposi
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wim Group and altered mafic dikes.
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Mount Nansen porphyry Cu-Mo deposit
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A Map 450 500 550 Cross section Dik
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Cretaceous and early Tertiary conti
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deposits, at Chichagoff and Hirst-C
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others, 1994c, 1997c). The signific
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tonnes grading 0.53 percent Ni, 0.3
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with a 0.25 percent cut-off. The de
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Bulkley Metallogenic Belt of Porphy
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Red Rose W-Au-Cu-Ag Polymetallic Ve
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ish Columbia and consists of severa
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during back-arc extension or transt
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stocks and dikes, is associated wit
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etrograde minnesotaite (Fe talc), F
Page 295 and 296:
Specific Events for Early to Middle
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of fractured and faulted Permian-Tr
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sists of a mineralized fracture zon
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dolomite. Wall rock alteration incl
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elt of late Tertiary plutons that a
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plates that exhibit magnetic anomal
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stages (Petrenko, 1999): (1) In the
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mon. The deposit is of medium size
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Metallogenic-Tectonic Model for Lat
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The origin of the Hg deposits of th
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margin or island-arc tectonic envir
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Columbia: Implicatons for the Middl
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Bazard, D.R., Butler, R.F., Gehrels
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Bradley, D.C., Haeussler, P.J., and
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Bundtzen, T.K., Laird, G.M., Caluti
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Cecile, M.P., 1982, The lower Paleo
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Debari, S.M., and Coleman, R.G., 19
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U.S. Bureau of Land Management Open
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Cordilleran Orogen in Canada: Geolo
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Goldfarb, R., Hart, C., Miller, M.,
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Grove, E.W., 1986, Geology and mine
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Høy, T., 1982a, Stratigraphic and
Page 339 and 340:
Jones, D.L., Silberling, N.J., Cone
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Kutyev, F. Sh., Baikov, A.I., Sidor
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Shield—Ultramafic magma and its m
Page 345 and 346:
Manns, F.T., 1981, Stratigraphic as
Page 347 and 348:
Miller, M.L., and Bundtzen, T.K., 1
Page 349 and 350:
Mortimer, N., 1987, The Nicola Grou
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Noble, S.R., Spooner, E.T.C., and H
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Canada Annual Meeting, Saskatoon, S
Page 355 and 356:
Perello, J.A., Fleming, J.A., O’K
Page 357 and 358:
Far East—Mineralogical criteria f
Page 359 and 360:
Roeske, S.M., Mattinson, J.M., and
Page 361 and 362:
Schmidt, J.M., and Zierenberg, R.A.
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formation occurrences: Materialy po
Page 365 and 366:
Struik, L.C., 1986, Imbricated terr
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Valuy, G., and Rostovsky, F., 1988,
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Wolfe, W.J., 1995, Exploration and
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Appendix Table 1. Mineral deposit m
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Table 2 Summary of correlations and
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Table 2—Continued Unit(s) and Cor
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Table 2—Continued Unit(s) and Cor
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Table 3—Continued Metallogenic Be
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Table 4. Significant lode deposits,
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Table 4—Continued Appendix 369 De
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Table 4—Continued Tracy Metalloge
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Table 4—Continued Appendix 373 In
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Table 4—Continued Deposit Name Mi
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Table 4—Continued Mainits Metallo
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Table 4—Continued Whitehorse Meta
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Table 4—Continued Appendix 389 LA
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Table 4—Continued Surprise Lake M
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Table 4—Continued Sredinny Metall
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