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

More documents

Recommendations

Info

Figure 13. Howards Pass sedknenWy exhla#re ZR- PbdepDds FwB ~ kCbWkrl t ~ stratigraphic column illustratkg m#w dratt8om, SkdfkbZC%W. AdK@bM fFwn hWgWtli ClB1). Origin of and Tectonic S e w Iw Howards Pass Metallogenk &k The Zn-Pb SEDEX depo&dWw of late Precambr~an ta W b kwmim, tdidhk @sndWuma thp~lurr bslollt, ohaletad &St2b@ll:b , equivalent of the shallow-water carbonate ad event was localized synchronously with local marine trans formation of sulphid resulting during rifling, vokmraq bsPinal ttubhcq local prim -gtwsim, sad reWd~&&mwdwkky'~~ passive continental margin of the Mddh A,cnqhp Craton. Kootenay Metallogenia 8@t of CWtxmwln of Sediment-Hosted Depwb (U& K6) Southern British Columbde The Kootenay southeastern British Ca volcanic, and plutonic roo terrane occurs between th tsthe-aadb& (fig. 3). Some of the older ~~~B~ regions of southeastern Bdii CXht&io, w pb&bly. be mtigPaphtczllty m b d with e~ $ tb N& C:- Margin (Monger and Ndcletm& IS)%]. The rri@$%W lk bh afe me, &@@p, area, H.B. (Zincton), and (fbWW>&pi&(k%& 4) @bkkm d &&& mw5,b g%aj.s
Mastadon SEDEX Pb-Zn(?) Deposit The Mastadon SEDEX Pb-Zn (?) deposit consists of pyrite, arsenopyrite, sphalerite, galena and sulfosalts which occur in bands, lenses and stringers from 0.1 to 12 meters wide (Mining Review, 1992). The hanging wall part of deposit consists of disseminated sphalerite, galena and pyrite; footwall part of deposit consists of massive arsenopyrite, sphalerite and pyrite. Ore minerals are concentrated along the contact between phyllite and limestone. Au is refractory and associated with arsenopyrite. The deposit contains estimated production and reserves of 12.27 million tonnes grading 4.9% Zn, 2.3% Pb, and 62 g/t Au. The deposit is hooted in Early Cambrian Hamill Formation quartzite and Badshot Formation with limestone forming the footwall. The deposit origin is poorly understood. Jersey SEDEX Pb-Zn Deposit The Jersey deposit consists of fine grained sphalerite and galena with pyrite, pyrrhotite and minor arsenopyrik in five ore bands ranging from 0.30 to 9 meters thick (Fyles and Hewlett, 1959; Sangster, 1986; Maclntyre, 1991). Sulfides occur more abundantly in fold troughs relative to fold crests. Cd is associated with sphalerite, Ag with galena. The deposit bas produced 7.7 million tonnes grading 3.49% Zn, 1.65% Pb, 3.08 g/t Ag. The deposit is hosted in the folded Reeves Member dolomite of the Early Cambrian Laib Formation, and may be a SEDEX Pb-Zn deposit. H. B. (Zincton) Pb-Zn SEDEX Deposit The H.B. (Zincton) Pb-Zn SEDEX deposit consists of pyrite and sphalerite which occur in narrow bands, irregular lenses or disseminations in dolomite of the Early Cambrian Reeves Formation (Sangster, 1986; MacIntyre, 1991; Hoy, 1982b; MINFLLE, 2002). Local cross-zones contain fine-grained massive sulfides which commonly occur as matrix in a coarse breccia. Tbe breccia zones are related lo thrust faults and are interpreted as secondary structures. Much of the dolomite in the West orebody is altered to talc The dcposlt has produced 6.7 rnillion tonnes grading 3.91% Zn, 0.74% Pb, 4.42 g/t Ag. Origin of and Teotvnic Setting for Komnay ldetallogenic Belt The Kootenay metallogtnic belt of Zn-Pb SEDEX deposits is hosted in platformal, Early Cambrian carbcmate rocks in the Kootenay metamorphosed continental margi.n terrane. The deposits commonly consist of bands and lenses of rphderite, galena and pyrite both conformable and discordant 10 often isoclinally folded and regionally metamcuphosed dolostone of the Badshat, Reeves and Laib formations. Mong with their host rocks, these deposits were deformed prior to deposition of uncdormably overlying strata of the Carboniferous Milford Assemblage (Monger and others, 1991). The age of the carbonate-hosed deposits is not hown with certainty, and may be either SEDEX, or highly-deformed replacement deposits in Ea~ly Cgmbrian carbonate rock. The mineral msemblagu, host rock age, and geologic setting for the Kootenay metallogenic belt are similar to those for the Anvil and Howards Pass metallogenic belts of the northern Canadian Cordillera as described above. All three belts are interpreted as fofilling from Pb- and Zn-rich fluids resulting during rifting, volcanism, basinal subsidence, bcal marine trulsgrcssion, and related hydrothermal activity aloag the passive continental margin of the North American Craton. Episodic rifling in the Cambrian through Ordovician is interpretd as opening several sedimentary basins in the Canadian Cordillera, such as the Selwyn Basin, with related formation of Zn-Pb SSEDEX deposits which are similar to those in the Kootenay metallogenic belt. Prtnce of Wales Island Metallogenio Belt of Coniinental-Margin ArcRelated Deposits (Belt PW) Southeastern Naska The Prince of Wales Island metallogenic belt occurs in Southeastern Alaska and consists mainly of a suite &porphyry Cu-Mo, polyrnelallic vein, and skarn deposits (fig. 3; tables 3,4) which occur mainly in alkalic Orodovian and Silurian piutons in the Alexander sequence of the Wrdngellia superterrane. The deposits and metallogenic belt occw on central and southeno Prince of Wales Island, and to a much lesser extent on Chichagof, Annette, and Gravina Islands in central- southeastern Alaska (Nokleberg and others, 199%). These alkalic plutons range in age from Late Ordovician to EarIy Silurian. The plutans intrude the meramorphosed Devonian(?) St. Joseph Island Volcanics (Eberlein and others, 1983; D.A. Brew, oral ccrmmun., 1995), Early and Middle(?) Devonian Karheen Formation (Gehrels, 1992; D.A. Brew, oral commun., 1995), Middle to Late Ordovician to Early Silurian Descon Formtion (Herreid and others, 1978; D.A. Brew, oral commun., 1995), and metamorphosed Latc Proterozoic and Early Cambrian(?) Wales Group (Gehrels and Berg, 1992; D.A. Brew, oral commun., 1995). The plutons and rnetasedimentary rocks form the older pail of the Alexander sequence in the region. The major granitic-magmatism-related deposits are represenlad by deposits in four areas: (1) several deposits in the McLean Arm porphyry Cu-Mo district; (2) the Klaka Inlet plymetallic skun and vein +sit; (3) the Kassan Peninsula Cu-Fe skarn deposit; and (4) the major zoned mafic-ultramafic Cu-Au-PGE depoail at Salt Chuck (table 4) (Nokleberg and others 1997a, b, 1998).
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 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 52 and 53: from crystalline basement of craton
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 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 86 and 87: hosted in the Yarkhodon subterrane
Page 88 and 89: origin of the younger Triassic(?) B
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:
Origin of and Tectonic Controls for
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 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 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?