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USGS Professional Paper 1697 - Alaska Resources Library

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newly created terranes migrated into the Angayucham Ocean.<br />

Derived from the North American Craton Margin (NAM) were<br />

the Kootenay (KO) and Yukon-Tanana (YT) passive continental-margin<br />

terranes. The following metallogenic belts, which<br />

contain massive sulfide, carbonatite-related Nb, Ta, and REE,<br />

or related deposits, formed during rifting: Berezovka River<br />

(BE); Cathedral (CA), Dempster (DE), Finlayson Lake (FL);<br />

Gataga (GA), Ingenika (IN), Liard (LI), older part of Mystic<br />

CRATON MARGIN<br />

TECTONIC ENVIRONMENTS AND<br />

GEOLOGIC UNITS<br />

EXPLANATION<br />

CRATONAL<br />

Cratons (No patterns) : NAC , North American; NSC , North Asian; NSS, Stanovoy block;<br />

Terranes: AK, Avekova; GN, Gonzha; KI , Kilbuck-Idono; OK, Okhotsk;<br />

OM,<br />

Omolon<br />

CONTINENTAL-MARGIN ARC, ISLAND ARC, OR TURBIDITE BASIN<br />

(Subduction-related; includes forearc and backarc, and related turbidite basin deposits)<br />

SUBDUCTION-ZONE OR ACCRETIONARY-WEDGE COMPLEX OR OPHIOLITE<br />

BACKARC SPREADING OR HOT-SPOT UNITS<br />

OCEANIC<br />

Craton Margins: NAM, North American; NSV,<br />

North Asian (Verkhoyansk foldbelt;<br />

NSS,<br />

North Asian (Stanovoy block)<br />

Passive continental-margin terranes (derived from craton margins): AA,<br />

Arctic<br />

<strong>Alaska</strong>; AP, Artis Plateau; CA, Cassiar; CH, Chukotka; CK, Chukchi Cap; CO,<br />

Coldfoot;<br />

CS, Chukchi Spur; DL, Dillinger; KN, Kula-Nera; KO, Kootenay; KT, Kotel’nyi; LO,<br />

Lomonosov; MY, Mystic; NR, Northwind Ridge; NX, Nikon Fork; OL, Oldoi; OV,<br />

Omulevka; PC, Porcupine; PR, Prikolyma; RA, Rassokha; RB, Ruby; SD, Seward; SR,<br />

Sredinny-Kamchataka; VL, Viliga; WS, Wickersham; YT , Yukon-Tanana; ZL,<br />

Continental-margin arcs: al, Aleutian; at, <strong>Alaska</strong> Range-Talkeetna Mountains; bw, Bowers<br />

Ridge; ca, Cascade; ck, Central Kamchatka; cn, Coast-North Cascade; ej, East Japanl; ek, East<br />

Kamchatka; es, East Sikhote-Alin; gg, Gravina-Nutzotin-Gambier; io, Indigirka-Oloy; ka,<br />

Kamloops; kc, Central Kamchatka; kk, Kamchatka-Koryak; kh, Kahiltna; km, Kuskokwim<br />

Mountains; ko, Khingan-Okhotsk; ku, Kuril; mo, Monakin; no, North Okhotsk; oc, Okhotsk-<br />

Chukotka; ol, Oloy; os, Oloy-Svyatov Nos; pn, Penzhina; ns Nelson; sb Spences Bridge; sh<br />

Shirshov Ridge; sv, Svyotoy-Nos; tt, Tahtsa-Twin Sisters- Francois Lake; ud, Uda; uo,<br />

Umlekan-Ogodzhin; wk, West Kamchatka; wr, Wrangell<br />

Terranes: AL, Alazeya; AX, Alexander; BE, Beryozovka; BU, Bureya; CD, Cadwallader;<br />

CK, Chilliwack River; IR, Iruneisky; IZ, Izee; KE, Kema; KH, Khetachan; KLO, Kolyma-Omolon<br />

superterrane; KM, Kony-Murgal; KRO, Kronotskiy; KT, Kotel’nyi; KY, Koyukuk; LA, Lan; LD,<br />

Laoelin-Grodekorsk; MAI, Mainitskiy; MT, Methow; NE, Nemuro; NU, Nutesyn; NY, Nyac; PE,<br />

Peninsula; OF, Olds Ferry; OKA, Olyutorka-Kamchatka; OL, Oloy; QN, Quesnellia; SB,<br />

Stobolvskoy; SG, Sergeevka; SH, Shmidt; ST, Stikinia; SY, Sorachi-Yezo; TG, Togiak; TR,<br />

Terpeniya; UB, Uniya-Bom; WA, Wallowa; WP, West Pekul’ney; WR, Wrangellia; WRA,<br />

Wrangellia superterrane; WSA, West Sakhalin; YA, Yarakvaam<br />

AG, Angayucham; AM, Amur River; AC, Aluchin; AGR, Argatas; ANV, Aniva; AV, Alkatvaam;<br />

BA, Baker; BD, Badzhal; BR, Bridge River; CC, Cache Creek; CG, Chugach; DB, Debin; EA,<br />

Easton; EK, Ekonay; GB, Garbyn’ya; GD, Goodnews; GL, Galam; GS, Grindstone; HI, Hidaka;<br />

HO, Hoh; KB, Khabarovsk; KK, Kamuikotan; KLM, Kiselevka-Manoma; KN, Kula Nera; KUK,<br />

Kuril-Kamchatka; MU, Munilkan; NAB, Nabilsky; OC, Olympic Core; OS, Oshima; PA, Penzhina-<br />

Anadyr; PK, Pekul’ney; PR, Pacific Rim; PW, Prince William; SA, South Anyui; SM, Slide<br />

Mountain; SMA, Samarka; SV, Seventymile; SZ, Siletzia; TD, Turkuringra-Dzhagdi; TL,<br />

Talovskiy; TO, Tokoro; TR, Terpeniya; TU, Taukha; UL, Ulban; UNK, Unknown; VE, Velmay; VT,<br />

Vetlovskiy; WK, West Kamchatka; YAK, Yakutat; YN, Yanranay<br />

am, Alpha and Mendeleev Ridges; bs, Bering Sea; cr, Columbia River; kr, Kuril;<br />

sj, Sea of Japan; sp, Sakhalin-Primorye<br />

Plates: FAR, Farallon; JF, Juan de Fuca; KULA, Kula; PAC, Pacific; EX, Explorer;<br />

Oceanic ridges: GK, Gakkel; JFR, Juan de Fuca; KOM, Komandorsky<br />

POST-ACCRETION OVERLAP SEDIMENTARY AND VOLCANIC UNIT,<br />

SUBMARINE FAN, OR OCEAN BASIN DEPOSIT<br />

ab, Amerasia Basin; ar, Anadyr; atb, Aleutian-Bowers; bo, Bowser; bu, Bureya; cb, Canada<br />

Basin; cf, Cordilleran Foreland; co, Colville; eb, Eurasia Basin; kb, Kuibiveem; kn, Kandik River;<br />

kw, Kuskokwim<br />

COLLAGE OF PREVIOUSLY ACCRETED TERRANES AND EXTINCT TERRANES,<br />

OVERLAP ASSEMBLAGES, AND BACKARC UNITS (names of units in parentheses)<br />

COLL, Collages of various accreted terranes (some labeled); ASC, Academy of Sciences;<br />

IOC, Institute of Oceanology; KT, Kotel’nyi; TA, Taymyr Peninsula<br />

Figure 18.—Continued.<br />

Middle and Late Devonian Metallogenic Belts (387 to 360 Ma; figures 16, 17) 41<br />

(MY), Northern Cordillera (NCO), Macmillan Pass (MP),<br />

Robb Lake (RL), Selennyakh River (SEL), Sette-Daban (SD),<br />

Southern Rocky Mountain (SRM), Tommot River (TO), Urultun<br />

and Sudar Rivers (URS), and Yarkhodon (YR).<br />

(4) The Sicker island arc was active along most of the<br />

length of the Wrangellia superterrane (WRA), which at this<br />

time was composed only of the Alexander sequence (AX) of<br />

the Wrangellia superterrane. Associated with the Sicker arc<br />

B B<br />

CONTACTS AND FAULTS<br />

(Dashed where concealed or approximately located; querried<br />

where unknown)<br />

Contact<br />

DE<br />

(cb)<br />

14 o<br />

Thrust fault, barbs on upper plate<br />

Strike-slip fault<br />

Regional continental-rift. Barbs<br />

towards extended area<br />

Subduction zone, barbs point<br />

toward subducting margin<br />

Transform fault along oceanic ridge<br />

SYMBOLS<br />

Oceanic ridges: GK, Gakkel;<br />

JFR, Juan de Fuca<br />

Backarc spreading, barbs face<br />

spreading basin<br />

Zone of active metamorphism and<br />

deformation of continental margin<br />

Zone of blueschist-facies metamorphism<br />

Fault name abbreviation<br />

Abbreviations for extensive extinct basin,<br />

previously accreted terranes, or inactive<br />

arcs in parentheses<br />

Direction of tectonic migration or major<br />

oroclinal bending<br />

Paleopole<br />

Paleolatitude<br />

PLUTONIC BELTS<br />

Collisional granite belts: ma, Main; no, Northern;<br />

om, Omineca-Selwyn; tr, transverse; wvk,<br />

West Verkhoyansk<br />

Subduction-related continental-margin plutonic rocks<br />

Oceanic-ridge-related plutonic rocks: sab,<br />

Sanak-Baranof plutonic belt<br />

FAULT NAMES<br />

AD Adycha-Taryn<br />

AL Aleutian megathrust<br />

CA Central Sikhote-Alin<br />

CC Cascadia megathrust<br />

CO Contact<br />

DE Denali<br />

FS Frasier-Straight Creek<br />

HA Harrison<br />

KA Kaltag<br />

KE Ketanga<br />

KK Kuril Kamchatka megathrust<br />

KO Kobuk-South Fork<br />

LE Lena<br />

Boundary of neotectonic block defined by<br />

modern seismicity<br />

METALLOGENIC BELT<br />

OH<br />

Relative direction and motion of<br />

oceanic plate and continental plates<br />

with respect to North American or North<br />

Asian Cratons<br />

LS Lyakhov-South<br />

Anyui<br />

MO Mongol-Okhotsk<br />

MY Myatisk<br />

NF Nixon Fork<br />

RL Ross Lake<br />

QC Queen Charlotte-<br />

Fairweather<br />

SH Sakhalin-Hokkaido<br />

TE Teslin<br />

TI Tintina<br />

UL Ulban<br />

UM Ulakhay<br />

Metallogenic belt with abbreviation

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