Metallogenesis and Tectonics of the Russian Far East, Alaska, and ...

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the core of the veins, chlorite, Mn-calcite, hodoehPsite, rhodonitc, and spessartina ou;ur with qmtz gangue. The veins occur near an Late Cretaceous-Paleocene (h4aastrichtisa to Danian) vdcanic vent. 'Ihe vmt breccia afso eontains disseminated sphalerite, galena, and castilcrile. The veins farmed iamdiaw after minaalization ~f veat brew4 which were dated a$ approximately 65 Ma by K-Ar imopic studies. The deposit is of &c. Avmge @&$ are 62 g/t Ag, 5 % /on 026 % Sn, and 6.77 % Zn. Tdl and i nimbrite E3 ~regaceous) Fl Rhyome porphyry Ff T&&&@ -1 (Late Cretaceous) Figure 88. Krasnogorskoe Pb-2.n polymeWlic veln dapoait Teukha mlakqenio bit, k~86ian % u b ~ &n&ed t QWQ$~ map and cross section. Adapted hrn Rakin imd athsrs (f990). Origin of and Tectonic ConlrPta for Taukha Metallogenic Belt The Cretaceous embid rocks hwlmg the Tacrkhn metahgenic balt are part of the k t SSkhot&Ah vvolca5idutonic belt (fig. 79) of Late Cretaceous and early Tertiary age (VosiW and Valy, 1988). The vdd wd plutonic units arc widespread and are controlled by NE-trending suikes1i.p and pull-w w m . The B arrd Pb&-Ag suffide -$am hosted in tectonlc lenses of Limestone or mdle which occur in tbo Tauka accmtimq-wedp tarane. The temure of malnly of Neocomian turbidte deposits O~~HOII~OITW w d Pdmoic Mesozoic guy@@, formed whlch overlying basalt pedestals, ~d CuboPifkroy~ througb J d c Permian, Triassic, and Beniasian thmugb Vdqinien &&sandstone 1997~). Berrian8 turb,idite brr~tgb Vfbghih Wditr:? md ~ddekg othm?, I*,
Like the Kema and Luzhkinsky metallogenic belts, the coeval Taukha metallogenic belt is hosted by East Sikhote-Alin volcanic-plutonic belt of Late Cretaceous and early Tertiary age (fig. 79) which is described in the above section the origin of the Taukha metallogenic belt. Other related, coeval metallogenic belts hosted in the East-Sikhote-Aline volcanic belt are the Kema, Luzhkinsky, Lower Amur, and Sergeevka (SG) belts (fig. 79; table 3). The differences between the coeval metallogenic belts are interpreted as due to the host igneous rocks intruding different bedrock. The Taukha metallogenic belt contains mainly B skarn, Pb-Zn skarn, and Pb-Zn polymetallic vein deposits, and is hosted in or near igneous rocks of the East Sikhote-Alin belt which intrude the Taukha accretionary-wedge terrane which contains a complex assemblage of abundant Paleozoic and early Mesozoic oceanic rocks and lesser Jurassic and Early Cretaceous turbidite deposits. In contrast, the Luzhkinsky metallogenic belt contains mainly Sn greisen and Sn polymetallic vein, and porphyry Sn deposits, and is hosted in or near granitoid rocks of the East Sikhote-Alin belt which intrude the Zuravlevksk-Tumnin turbidite basin terrane which contains mainly Late Jurassic and Early Cretaceous turbidite deposits. Kema Metallogenic Belt of Ag-AU Epithermal Vein, and Porphyry Cu-Mo Deposits (Belt KM) Eastern Part of Russian Southeast The Kema metallogenic belt of Ag-Au epithermal vein and porphyry Cu-Mo deposits (fig. 79; tables 3,4) occurs in the eastern part of the Russian Southeast. The deposits in the metallogenic belt are hosted in or near Late Cretaceous and early Tertiary granitoid rocks of the East Sikhote-Alin volcanic-plutonic belt which intrude or overlie the Kema island-arc terrane (Nokleberg and others, 1994c, 1997~). The major Au-Ag epithermal vein deposits in the Kema metallogenic belt are at Burmatovskoe, Glinyanoe, Salyut, Sukhoe, Tayozhnoe, Verkhnezolotoe, and Yagodnoe (table 4) (Nokleberg and others 1997a, b, 1998). Porphyry Cu deposits are at Nesterovskoe and Nochnoe, porphyry Cu-Mo deposits are at Sukhoi Creek, and a porphyry Mo deposit is at Moinskoe. The Ag epithermal vein deposits, as at Tayoznoe, also occur in Early Cretaceous clastic and volcaniclastic rocks and in overlying Late Cretaceous and Paleogene, subalkalic, postaccretionary volcanic rocks of the East Sikhote-Alin igneous belt. Ag sulfosalt minerals predominate in the deposits. Concentrations of Ag are much greater than Au, and Ag/Au ratios generally are greater than 25 to 30. Rare Pb-Zn polymetallic vein deposits occur in the metallogenic belt, but are not economic (P.1. Logvenchev, O.L. Sveshnikova, and V.A. Pakhomova, written commun., 1994; Pakhomova and others, 1997). However, these deposits are generally of little commercial value at the present. The epithermal vein deposits generally occur mostly in or near Danian (early Paleocene) and Paleocene volcanic rocks; however, a few occur in granodiorite plutons (Khomich and others, 1989). Porphyry Cu-Mo deposits in the Kema metallogenic belt occur mainly in the northern part of the belt at Moinskoe, Nochnoe, and Sukhoi Creek. These deposits generally consist of disseminations and veinlets in and near the intrusive rocks and coeval volcanic rocks which often contain notable amounts of Pb, Zn, W, Au, and Ag in addition to Cu and Mo. The deposits occur in Late Cretaceous to Paleogene granitic and diorite intrusions. A porphyry Cu deposit occurs in the southern part of the belt at Nesterovskoe. In the western part of the belt, in the eastern part of the adjacent Luzhkinsky terrane, are porphyry Sn deposits, as at Mopau. Glinyanoe Ag Epithermal Vein Deposit The rich Glinyanoe Ag epithermal vein deposit (A.N. Rodionov, written commun., 1986) consists of adularia-quartz, sericite-chlorite-quartz, and carbonate-chlorite-quartz mineralized veins and zones which contain pyrite, arsenopyrite, galena, sphalerite, chalcopyrite, argentite, acanthite, Ag-tellurides, and native gold and silver. The veins and zones occur in altered, silicified volcanic rocks which overlie Late Cretaceous (Santonian) felsic volcanic rocks. The deposit is interpreted to have occurred in four stages: (1) gold-pyrite-quartz; (2) quartz-hydromica and quartz-carbonate; (3) gold-silver; and (4) quartz-chlorite- adularia with Ag-sulfosalts. The age of the deposit is interpreted as Late Cretaceous to Paleogene. The deposit is judged to be small. Average grades are 8.3 g/t Au and 122 g/t Ag. Sukhoi Creek Porphyry Cu-Mo Deposit The Sukhoi Creek porphyry Cu-Mo deposit (Petrachenko and others, 1988) consists of stockworks which reach several hundred m across, and in altered zones. Polymetallic ore dominates in some stocks. The ore minerals are chalcopyrite, molybdenite, sphalerite, galena, cassiterite, scheelite, and pyrite; with significant Au and Ag contents. The deposit occurs in Early Cretaceous sedimentary rocks which are overlain by Late Cretaceous volcanic rocks and are crosscut by ore-bearing granitic intrusions with a K-Ar isotopic age of 73 Ma. The Porphyry Mo mineralization is related to several granodiorite and granite stocks which are intensely hydrothermally altered. Quartz-sericite alteration and medium-temperature epidote-prehnite-chlorite propylitic alteration occur at the core and grade into micaceous-chlorite-carbonate propylite at the periphery. The granite is locally altered to quartz-muscovite greisen with tourmaline and sphene, and in a few places into a peculiar garnet-phlogopite rock with apatite. The host siltstone and sandstone are altered to orthoclase-actinolite-chlorite hornfels and the felsic extrusive rocks are altered to quartz and phyllite. Average Cu and Mo contents are low, up to 0.2 and 0.01% respectively. The deposit is not explored at depth.
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I EUSGS science Ior a changing wwld
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CONTENTS Abstract .................
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5 : 3 . Kedon metall lo genic Belt
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Parson and Brisco Barite Vein and G
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Overview ..........................
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Chepak Granitoid-Related Au Deposit
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Origin of and Tectonic Controls for
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Page 17 and 18:
Au-Ag Epithermal Vein Deposits Asso
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Metallogenesis and Tectonics of the
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and Byalobzhesky (1996). A volume c
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1,079 significant mineral deposits
Page 26 and 27:
Acknowledgements We thank the many
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0 --mmm=oRuwrrrur ommmmarUaAll NEr-
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Figure 3. Generalized map of mtljor
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Archean granulite facies metamorphi
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Figure 5. Oroek sediment-h section
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1 a a - --rich sandstone ~b-Qmg@ner
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Origin of and Tectonic Setting for
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occur in clastic and impure carbona
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Figure 7. Sullivan sedimentary-exha
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I 1997a, b, 1998). The massive sulf
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Ma which locally form extensive plu
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Figure 10. Gerbikanskoe vdcanogenic
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from crystalline basement of craton
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Figure 13. Howards Pass sedknenWy e
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McLean Arm Porphyry Cu-Mo District
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[..'......I Surfia'al deposits (Hol
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Figwe 16. GeneraCied map of major M
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.- *.-* *. . - - ---- -A - EARLY MI
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Metallogenic Belt Formed During Col
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several tens of meters to 1,300 m l
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Goldfarb (197) who interprets that
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WTF and Red Mountain Kuroko Massive
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interpreted by and as part of a ext
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Mount Sicker Metallogenic Belt of K
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interpreted as vents. The deposit c
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Page 82 and 83:
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hosted in the Yarkhodon subterrane
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origin of the younger Triassic(?) B
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Mississippian age of mineralizalioi
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Monger and Nokleberg, 1996; Noklebe
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1997a, b). Most of the magnesite an
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FL - Finlayson Lakm FR-FmLake LI -
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disseminations in chert, disseminat
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U F~gure 32 GemMzed m p of mejw -ni
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terrane, and by the Stikine Assembl
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Metallogenic-Tectonic Model for Lat
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. I . r ; 4 ~ (9) During subduction
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Eastern Alaska Range Metallogenic B
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individual flows range from 5 cm to
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occurrence of turbiditic clastic ro
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along the with tectonically-related
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: m- 3- w43 k M- u m u~u) mtl 'M~!A
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island-arc volcanic rocks of the Ni
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-- - //// EpldoW Figure 41. Nickel
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(TC), and Toodoggone (TO) belts whi
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(4) The Angayucham Ocean (Kobuck Se
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lueschist units and the McHugh Comp
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Figure 46. Lawyers Au-Ag epitiefmel
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(5) The Angayucham Ocean (Kobuck Se
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Figure 49 Generaltzed map Of mbjm L
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continental-margin terranes which w
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Pokrovskoe Au-Ag Epithermal Vein De
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Granite-porphm and wanits W e ~~ hl
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subordinate adularia, dolomite, cel
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shale, basalt, plagiorhyolite, silt
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ocks and serpentinite which occur a
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interpreted as forming in the Juras
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Fault / Figure 57. Bond Creek and O
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Klukwan-Duke Metallogenic Bett of M
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tonnes of ore mined between 1967 an
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Cariboo Metallogenic Belt of Au Qua
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Sheep Creek Au-Ag Polymetallic Vein
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---. .% of the North American Conti
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- OwiapaasembC Cmhmmmand Cemmcl. an
Page 172 and 173: in the west-central part of the Rus
Page 174 and 175: for about 850 krn (ZalishshaL ad oh
Page 176 and 177: Stanovoy Metallogenic Belt of Grani
Page 178 and 179: Goryachev, 1995, 1998, 2003) consis
Page 180 and 181: Altinskoe, Aragochan, Dalnee, Dokhs
Page 182 and 183: comprises up to 70-80% in some ore
Page 184 and 185: The Au quartz vein deposits are int
Page 186 and 187: leucogranite plutons form large, ho
Page 188 and 189: + , . Diorite phyry dike (Early ~ta
Page 190 and 191: - . --- Origin of and Tectonic Cont
Page 192 and 193: Britannia Metallogenic Belt of Kuro
Page 194 and 195: Specific Events for Late Early Cret
Page 196 and 197: Figure 73. Solnechnae Sin qu- ~d~ n
Page 198 and 199: - Origin of and Tectonic Controls f
Page 200 and 201: Nome Metallogenic Belt of Au Quartz
Page 202 and 203: quartz vein deposits of the Souther
Page 204 and 205: Selwyn Plutonjc Suite. The host roc
Page 206 and 207: along the western end in the Eagle
Page 208 and 209: 101 Ma (K.M. Dawson, unpublished da
Page 210 and 211: I Bayonne Metallogenic Belt of Porp
Page 212 and 213: ., (VV) belts. These zones and beb
Page 214 and 215: I (2) The East Sikhote-Alin (es) co
Page 216 and 217: Metallogenic Belt Formed in Late Me
Page 218 and 219: The Pb-Zn polyrnetallu: vein depb a
Page 220 and 221: olistolith. The deposit is currentl
Page 224 and 225: Tayozhnoe Ag Epithermal Vein Deposi
Page 226 and 227: Figure 90. lskra deposit Sn polyrne
Page 228 and 229: - El (Late ~re&ceous) I+ we cmm=s)
Page 230 and 231: Figure 93. Mnogovershinnoe AMq @pWw
Page 232 and 233: immed by wehrlite, olivine-magnetit
Page 234 and 235: Eastern Asia-Arctic Metallogenic Be
Page 236 and 237: which would be hosted in the early
Page 238 and 239: Etandzha Porphyry Cu-Mo and Muromet
Page 240 and 241: 0- / Fadt . . Au veins and pods Fig
Page 242 and 243: Sentachan Clastic-Sediment-Hosted A
Page 244 and 245: I I I Undifferentiated vdcanic and
Page 246 and 247: .r . : . -d ' . . ,, $44 . assembla
Page 248 and 249: closure, the Chukotka supertca&c wa
Page 250 and 251: - Mgh anglefau#or prsminant Fitwar
Page 252 and 253: intrude and crosscut both the relat
Page 254 and 255: Figure 101 8. Ke~ecolt &4W d KemwaI
Page 256 and 257: Figure 103. Generalized map of majo
Page 258 and 259: metallogenic belt (SP) which contai
Page 260 and 261: Eastern Asia-Arctic Metallogenic Be
Page 262 and 263: Valunistoe Au-Ag Epithermal Vein De
Page 264 and 265: Lost River Sn-W Skarn and Sn Greise
Page 266 and 267: Wheeler Creek, Clear Creek, and Zan
Page 268 and 269: Au veln,and hots spring deposits at
Page 270 and 271: Chicken Mountain Cu-Au Deposit The
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Chip sample location - Fault / Cont
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A proximate laatbm c#f C h # d ~nar
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0.03 1% Mo; and (3) for a hypogene
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others, 1994c. 1997~). The granitoi
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Cross section - - South greisen zon
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198 1). The mine at the deposit pro
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Beatson (Latouche) and Ellamar Bess
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CRETACEOUS Mount Leonard St& gueYtr
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n pJ pRanens. Pd-dc i3 Meeomic .---
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Figure 120. Huckleberry porphyry Cu
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0.15% Cu (ox), 0.127 g/t Au, and 0.
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Zone are 188 million tonnes grading
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Kitsault (B.C. Moly) Porphyry Mo De
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million tonnes grading 0.42% Cu, 0.
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extension. The Coryell Suite is int
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elated deposits. Forming in the bac
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Metallogenic Belts Formed in Tertia
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Hg Deposits Hg deposits occur throu
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Maletoivayam Sulfur-Sulfide Deposit
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(5) A major orthogonal junction for
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Metallogenic Belts Formed in Tertia
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occur in these tabular, altered sil
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summarlzed above are used by analog
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the Aleutian volcanic belt. The Yak
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metamorphism, anatectic granites, a
Page 328 and 329:
References Cited Abbott, G., 1981,
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Society of America Abstracts with P
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Sciences, North-Eastern lnterdiscip
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Burgoyne, A.A., 1986, geology and e
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Canadian Cordillera, Yukon-northeas
Page 338 and 339:
the Koryak Highlands: Transactions
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during 1984: U.S. Geological Survey
Page 342 and 343:
Northeast Scientific Intergrated Re
Page 344 and 345:
House, G.D., and Ainsworth, B., 199
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International Field Conference in V
Page 348 and 349:
lithosphere in flood basalt genesis
Page 350 and 351:
MacKevett, E.M., Jr., 1978, Geologi
Page 352 and 353:
Miller, M.L., Bundtzen, T.K., and K
Page 354 and 355:
Nekrasov, I.Ya., 1995, Genetic type
Page 357 and 358:
Pakhomova, V.. Silyanik, V., Popov,
Page 359 and 360:
Pollack, John, 1997, Summary report
Page 361 and 362:
1993: British Columbia Geological S
Page 363 and 364:
Schroeter, T.G., 1987, Golden Bear
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Geology of the Liese zone, Pogo pro
Page 367 and 368:
Colorado, Geological Society of Ame
Page 369 and 370:
lnstitute of Mining and Metallurgy
Page 371 and 372:
Anorthosite apatite-Ti-Fe Gabbroic
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TABLE 2. Summary of correlations an
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TABLE 2. Summary of correlations an
Page 377 and 378:
9! TABLE ectonic environment of Pro
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(Abbreviation) Rassokha (RA) Dzhard
Page 381 and 382:
Metallogenic Belt (Abbreviation) Be
Page 383 and 384:
Major Mineral Deposits Types. Envir
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(Abbreviation) Guichon (GU) I Belt
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Major Mineral Deposits Types. Envir
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(Abbreviation) (Significant Mineral
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(Abbreviation) Adycha-Taryn (EAAT)
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~etallo~enic Belt Major Mineral Dep
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Metallogenic Belt (Abbreviation) Ca
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TABLE 4. Significant lode deposits,
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Mineral Deposit Model Major Metals
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Deposit Name Mineral Deposit Model
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Deposit Nmme Mineral Deposit Model
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p;. ;A'..* Deposit Name Mineral Dep
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Page 423 and 424:
Page 425:
De~osit Name Mineral Deposit Model
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