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

More documents

Recommendations

Info

quartz vein deposits of the Southern Brooks Range metallogenic belt only occur in a small portion of the greenschist facies metasedimentary rocks of the southern Brooks Range. However, the more extensive placer Au deposits along the Brooks Range may be derived from undiscovered, or now totally eroded Au quartz vein deposits. The Au quartz vein deposits in the Southern Brooks Range metallogenic belt are interpreted as coeval with the Nome metallogenic belt to the southwest. Fish River Metallogenic Belt of Sedimentary P and Fe Deposits (Belt FR) Northern Yukon Territory The Fish River metallogenic belt of sedimentary P and Fe deposits occurs in the northern Yukon Territory (fig. 62; tables 3,4) (Nokleberg and others, 1997b, 1998)and is hosted in the Early Cretaceous Blow River Formation. The significant deposits are at Big Fish River and Alto. The Fish River metallogenic belt is herein tentatively interpreted as forming during Late Mesozoic, dextral movement along the Kaltag-Porcupine fault system. The Fish River (Big Fish, Boundary, Rapid) stratabound Fe-P deposit consists of siderite and phosphatic ironstone which occur in shale in an Early Cretaceous (Albian) clastic wedge (Yukon Minfile, 1988; Butrenchuk, 1996). The ironstone consists of phosphate-siderite pellets and granules in a matrix of detrital quartz and mudstone. Rare phosphate minerals occur in epigenetic fracture veins and to a lesser degree in vugs, bedding plane partings, and fault breccia. The deposit is the well-known type locality of lazulite, the official Yukon gemstone. Estimated resources are over 1 billion tonnes grading 40% Fe. The Alto oolitic magnetite iron formation is hosted in black shale of the Jurassic and Cretaceous Kingak Formation (Norris, 1976; Yukon Minfile, 1987). The deposit consists of olitic magnetite which occurs in a 45-m-thick bed, which occurs for a strike length of 350 m, and is part of a recessive-weathering black shale which is about 50 m above the base of the Kingak Formation. Estimated resources are 50 million tonnes grading 55% Fe (Norris, 1976). The Early Cretaceous Blow River Formation is part of a thick, clastic wedge deposited in the Blow Trough which is interpreted as forming during late Mesozoic, dextral movement along the Kaltag-Porcupine fault system (Norris and Yorath, 1981). The sideritic ironstone and phosphorites are interpreted to be distal, reworked deep water pellet packstone deposits within a thick silt and conglomerate unit with a westerly clastic source (Yeo, 1992). The Blow River Formation contains an estimated P202 resource of approximately 7 billion tonnes, in addition to a larger resource of low-grade iron ore Young (1977b). Metallogenic Belts Formed in Late Mesozoic Collision and Accretion of Wrangellia Superterrane, and Generation of OminecaSelwyn Plutonic Belt, Canadian Cordillera Selwyn Metallogenic Belt of W-CU Skam, Zn-PbAg Skarn, and Zn-PbAg Manto Deposits, Eastern and Northeastern Yukon Territory (Belt SW) The Selwyn metallogenic belt W-Cu skam, Zn-Pb-Ag skarn, and Zn-Pb-Ag manto deposits (fig. 62; tables 3,4) occurs in the eastern and northeastern Yukon Territory and consists primarily of an arcuate belt of W-Cu (Zn-Mo) skams, and Zn-Pb-Ag (Cu-W) skarns and manto deposits which are hosted in or near the related granitoid stocks of the mid-Cretaceous Selwyn Plutonic Suite (Anderson, 1983b). This suite is part of the Omineca-Selwyn plutonic belt which extends from southeastern Yukon Tenitory and southwestern Northwest Territories, northwestward into the Mayo district. The major W skam deposits are at Bailey (Pat), Canada Tungsten (Cantung), Lened (Rudi, Godfiey), MacTung (MacMillan Tungsten), and the major Pb-Zn skarn and manto deposits are at Sa Dena Hes (Mt. Hundere), McMillan (Quartz Lake), and Prairie Creek (Cadillac; table 4) (Nokleberg and others 1997a, b, 1998). Other potentially economic skarn tungsten deposits in the belt include, from southeast to northwest, Bailey with an estimated resource of 405,454 tonnes grading 1 .O% WO3, Baker-Lened with an estimated resource of 750,000 tonnes grading 1.2% W03, and Clea (Dawson, 1996~). Canada Tungsten (Cantung) W Skam Deposit The Canada Tungsten (Cantung) W skarn deposit (fig. 76) consists of pyrrhotite, scheelite and chalco~vrite with minor sphalerite in diopside skarn bodies which replace two members of Early Cambrian limestone ( Sinclair, I 1986; E'MI R Canada, 1989; Yukon Minfile, 1990; Dawson and others, 199 1). The host rocks are the Cambrian to Devonia n part oft he North American Continental Margin. The skarns are related to intrusion of a Late Cretaceous quartz monzonite (K-Ar ag e of 94.6 Ma) of the Selwyn Plutonic Suite. Prograde garnet-pyroxene skarn is overprinted by a hydrous, retrograde, pyrrhotite-andradite-amphibolebiotite-scheelite skam. The deposits include the Pit orebody which produced 1.5 1 million tonnes of ore yielding 40,087 tonnes of W03 between 1962 and 1986, and the E-Zone orebody with reserves of 4.2 million tonnes grading 1.6% W03 and 0.23% Cu, with associated Bi (Dawson, 1996c; Matheison and Clark, 1984). The large, high-grade E-zone scheelite orebody contains estimated combined reserves and resources of 7 million tonnes grading 1.5% W03 and 0.2% Cu. Production, that ceased in 1986, resumed in
200 1 on mineable reserves of 630,OO tonnes of 1.82% W03.(North American Tungsten Corporation news release, January 21, 200 1). MamriNen Pass (IWactung) Skam W Deposit The Macmillan Pass (Mactung) skarn W deposit consists of scheelite, pyrrhotite and minor chalcopyrite iD several pyroxene-garnet skarns which replace Cambrian to Ordovician limestone and limestone breccia (Sinclair, 1986; EMR Canads, 1989; Dawson and others, 1991; Mining Review, 1992). The host rocks are part of a folded Cambrian and Devonian wler-shelf sequence of carbonate and pelitic rocks of the North American Continental Margin. The host rocks me flanked by ad infaad to be underlain by the Late Cretaceous quartz monzonite Mactung stock (with a K-Ar isotopic age of 89 Ma) of he SeIwyo Plulonic Suite. Hydrothermal alteration has produced three distinct concentric skam zones: a peripheral zone of gamet-pyroxene skarn; an intermediate zone of pyroxene skarn; and a central zone of pyroxene-pyrrhotite skam. Estimated combined reserves and resources are 32 million tomes grading 0.92 WO, (Atkinson and Baker, 1986; Dawson and others, 1991). Lower Camtxlan - 1 Dohite Argdlite 1-1 . . Q"aae UppetAr@llHt fFj ore ~ m~tane a SWi68 Chsese mstaR Upper Proterozck - Lower Carribtian f [=I LOW Aqllite Vampire - Sekwi Formation Formation Figure 76. Canada Tungstm W skarn deposit, Selwyn metallogenic belt, Canadian Cordillera. Schematic cross section. Adapted from Gordey and Andersoh (1993). Sa Den8 Hes, Quartz Lake, and Prairie C mk Skarn and Mento Zn*Pb-Ag Deposits a-Pb-Ag skam deposits occur in several belts adjacent to the Mount Billings batholith in southastern Yukon Territory. and the Flat River and smallex stocks in southwestern Northwest Territories. The associated granitoid plutonic rocks are part of the
Page 1 and 2:
I EUSGS science Ior a changing wwld
Page 3 and 4:
CONTENTS Abstract .................
Page 5 and 6:
5 : 3 . Kedon metall lo genic Belt
Page 7 and 8:
Parson and Brisco Barite Vein and G
Page 9 and 10:
Overview ..........................
Page 11 and 12:
Chepak Granitoid-Related Au Deposit
Page 13 and 14:
Origin of and Tectonic Controls for
Page 15 and 16:
Page 17 and 18:
Au-Ag Epithermal Vein Deposits Asso
Page 19:
Metallogenesis and Tectonics of the
Page 22 and 23:
and Byalobzhesky (1996). A volume c
Page 24 and 25:
1,079 significant mineral deposits
Page 26 and 27:
Acknowledgements We thank the many
Page 28 and 29:
0 --mmm=oRuwrrrur ommmmarUaAll NEr-
Page 30 and 31:
Figure 3. Generalized map of mtljor
Page 32 and 33:
Archean granulite facies metamorphi
Page 34 and 35:
Figure 5. Oroek sediment-h section
Page 36 and 37:
1 a a - --rich sandstone ~b-Qmg@ner
Page 38 and 39:
Origin of and Tectonic Setting for
Page 40 and 41:
occur in clastic and impure carbona
Page 42 and 43:
Figure 7. Sullivan sedimentary-exha
Page 44 and 45:
I 1997a, b, 1998). The massive sulf
Page 46 and 47:
Ma which locally form extensive plu
Page 48 and 49:
Figure 10. Gerbikanskoe vdcanogenic
Page 50 and 51:
Page 52 and 53:
from crystalline basement of craton
Page 54 and 55:
Figure 13. Howards Pass sedknenWy e
Page 56 and 57:
McLean Arm Porphyry Cu-Mo District
Page 58 and 59:
[..'......I Surfia'al deposits (Hol
Page 60 and 61:
Figwe 16. GeneraCied map of major M
Page 62 and 63:
.- *.-* *. . - - ---- -A - EARLY MI
Page 64 and 65:
Metallogenic Belt Formed During Col
Page 66 and 67:
Page 68 and 69:
several tens of meters to 1,300 m l
Page 70 and 71:
Goldfarb (197) who interprets that
Page 72 and 73:
WTF and Red Mountain Kuroko Massive
Page 74 and 75:
interpreted by and as part of a ext
Page 76 and 77:
Mount Sicker Metallogenic Belt of K
Page 78 and 79:
interpreted as vents. The deposit c
Page 80 and 81:
Page 82 and 83:
Page 84 and 85:
Page 86 and 87:
hosted in the Yarkhodon subterrane
Page 88 and 89:
origin of the younger Triassic(?) B
Page 90 and 91:
Page 92 and 93:
Mississippian age of mineralizalioi
Page 94 and 95:
Monger and Nokleberg, 1996; Noklebe
Page 96 and 97:
1997a, b). Most of the magnesite an
Page 98 and 99:
FL - Finlayson Lakm FR-FmLake LI -
Page 100 and 101:
disseminations in chert, disseminat
Page 102 and 103:
U F~gure 32 GemMzed m p of mejw -ni
Page 104 and 105:
terrane, and by the Stikine Assembl
Page 106 and 107:
Page 108 and 109:
Metallogenic-Tectonic Model for Lat
Page 110 and 111:
. I . r ; 4 ~ (9) During subduction
Page 112 and 113:
Eastern Alaska Range Metallogenic B
Page 114 and 115:
individual flows range from 5 cm to
Page 116 and 117:
occurrence of turbiditic clastic ro
Page 118 and 119:
along the with tectonically-related
Page 120 and 121:
: m- 3- w43 k M- u m u~u) mtl 'M~!A
Page 122 and 123:
island-arc volcanic rocks of the Ni
Page 124 and 125:
-- - //// EpldoW Figure 41. Nickel
Page 126 and 127:
(TC), and Toodoggone (TO) belts whi
Page 128 and 129:
(4) The Angayucham Ocean (Kobuck Se
Page 130 and 131:
lueschist units and the McHugh Comp
Page 132 and 133:
Page 134 and 135:
Figure 46. Lawyers Au-Ag epitiefmel
Page 136 and 137:
Page 138 and 139:
(5) The Angayucham Ocean (Kobuck Se
Page 140 and 141:
Figure 49 Generaltzed map Of mbjm L
Page 142 and 143:
continental-margin terranes which w
Page 144 and 145:
Pokrovskoe Au-Ag Epithermal Vein De
Page 146 and 147:
Page 148 and 149:
Granite-porphm and wanits W e ~~ hl
Page 150 and 151:
subordinate adularia, dolomite, cel
Page 152 and 153: shale, basalt, plagiorhyolite, silt
Page 154 and 155: ocks and serpentinite which occur a
Page 156 and 157: interpreted as forming in the Juras
Page 158 and 159: Fault / Figure 57. Bond Creek and O
Page 160 and 161: Klukwan-Duke Metallogenic Bett of M
Page 162 and 163: tonnes of ore mined between 1967 an
Page 164 and 165: Cariboo Metallogenic Belt of Au Qua
Page 166 and 167: Sheep Creek Au-Ag Polymetallic Vein
Page 168 and 169: ---. .% of the North American Conti
Page 170 and 171: - 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 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 222 and 223: the core of the veins, chlorite, Mn
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
Page 272 and 273:
Chip sample location - Fault / Cont
Page 274 and 275:
A proximate laatbm c#f C h # d ~nar
Page 276 and 277:
0.03 1% Mo; and (3) for a hypogene
Page 278 and 279:
others, 1994c. 1997~). The granitoi
Page 280 and 281:
Cross section - - South greisen zon
Page 282 and 283:
Page 284 and 285:
198 1). The mine at the deposit pro
Page 286 and 287:
Beatson (Latouche) and Ellamar Bess
Page 288 and 289:
Page 290 and 291:
CRETACEOUS Mount Leonard St& gueYtr
Page 292 and 293:
n pJ pRanens. Pd-dc i3 Meeomic .---
Page 294 and 295:
Figure 120. Huckleberry porphyry Cu
Page 296 and 297:
0.15% Cu (ox), 0.127 g/t Au, and 0.
Page 298 and 299:
Zone are 188 million tonnes grading
Page 300 and 301:
Kitsault (B.C. Moly) Porphyry Mo De
Page 302 and 303:
million tonnes grading 0.42% Cu, 0.
Page 304 and 305:
extension. The Coryell Suite is int
Page 306 and 307:
elated deposits. Forming in the bac
Page 308 and 309:
Metallogenic Belts Formed in Tertia
Page 310 and 311:
Hg Deposits Hg deposits occur throu
Page 312 and 313:
Maletoivayam Sulfur-Sulfide Deposit
Page 314 and 315:
Page 316 and 317:
(5) A major orthogonal junction for
Page 318 and 319:
Metallogenic Belts Formed in Tertia
Page 320 and 321:
occur in these tabular, altered sil
Page 322 and 323:
summarlzed above are used by analog
Page 324 and 325:
the Aleutian volcanic belt. The Yak
Page 326 and 327:
metamorphism, anatectic granites, a
Page 328 and 329:
References Cited Abbott, G., 1981,
Page 330 and 331:
Society of America Abstracts with P
Page 332 and 333:
Sciences, North-Eastern lnterdiscip
Page 334 and 335:
Burgoyne, A.A., 1986, geology and e
Page 336 and 337:
Canadian Cordillera, Yukon-northeas
Page 338 and 339:
the Koryak Highlands: Transactions
Page 340 and 341:
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
Page 346 and 347:
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
Page 365 and 366:
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
Page 373 and 374:
TABLE 2. Summary of correlations an
Page 375 and 376:
TABLE 2. Summary of correlations an
Page 377 and 378:
9! TABLE ectonic environment of Pro
Page 379 and 380:
(Abbreviation) Rassokha (RA) Dzhard
Page 381 and 382:
Metallogenic Belt (Abbreviation) Be
Page 383 and 384:
Major Mineral Deposits Types. Envir
Page 385 and 386:
(Abbreviation) Guichon (GU) I Belt
Page 387 and 388:
Major Mineral Deposits Types. Envir
Page 389 and 390:
(Abbreviation) (Significant Mineral
Page 391 and 392:
(Abbreviation) Adycha-Taryn (EAAT)
Page 393 and 394:
~etallo~enic Belt Major Mineral Dep
Page 395 and 396:
Metallogenic Belt (Abbreviation) Ca
Page 397 and 398:
TABLE 4. Significant lode deposits,
Page 399 and 400:
Mineral Deposit Model Major Metals
Page 401 and 402:
Deposit Name Mineral Deposit Model
Page 403 and 404:
Page 405 and 406:
Page 407 and 408:
Page 409 and 410:
Page 411 and 412:
Deposit Nmme Mineral Deposit Model
Page 413 and 414:
Page 415 and 416:
Page 417 and 418:
Page 419 and 420:
p;. ;A'..* Deposit Name Mineral Dep
Page 421 and 422:
Page 423 and 424:
Page 425:
De~osit Name Mineral Deposit Model
show all

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

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?