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

TECTOflK EWVIROMMENTS AND
O m WITS
EXPLANATION
CRAWL
Cratons (No patterns): NAC, North American; NSC,
North Man; NSS. 9anovoy bWr;
CRATOn rMR6w
Craton M-s: NAM. American; NSV, North
Asian (Verkhoyansk foldbe&
MS,
North Aslan (Stanovoy W)
Passive mtinentd-margin terranes (derived from craton
margins): AA. Arctic Alaska; AP, Ark Pldeau; CA,
COMTIMENTALMARGIN ARC. ISLAND m. OR m l l E BASHt
-ion-Related; Includes forearc dL b.aLTr ud mrrW. b.J1 daposils)
Continentat-margin arcs: al, Aleutian; at, Ahska Range-
Talkeelna Mountains: bu, Bowers ca, Cascade; ck,
CWd MaW; Cn, Coast-Narth Cascade; ej, East Japanl;
ek, East Kamcllatka; es, East Sikhote-Alin; gg, Gravina-
ktzotin-Gambier; io, Indigirka-Ow; ka, Karnloops; kc,
Central Kamchatka: kk, KmdmibKoryak; kh, Kahiltna; km,
Kuskokwirn Mountains; ko, Khingan-Okhotsk; ku, Kuril; mo,
bakin; no, Nwth Ckbtsk oc, OWobk-Chukotka; 01, Oloy;
08, Oloy-Svyatov RCos; pn, Penzhina; ns )3e3son; sb Spences
Bsictge; sh Shirmhv Ridge; sv, Svyotoy-Nos; tt, Tahtsa-Twin
AG Angayuchrn: AM. Amur River; AC, Nuchin: AGR,
Argatas; ANV, Aniva: A", Alkatvaam; B*, Baker; BD,
Badzhel; BR, Wlge River; CC, Cache Creek; CG, Chugach;
D8, Debin; EA, Easton; EK, Ekonay; GB, Gmbyn'ya; GD,
Goodnews; 6L, Galam; GS, Grindstone; HI, Wdaka; HO, Hoh;
KB, Khabarwsk KK. Kartwkotan; KLM, Kielevka-Manoma;
8*U(ARCSPREIOllliORnat~UI(M
I* rd klpdeleer Ridges: bs Beng Ses or. Cdunbie Flhrer: kr. Kunl:
a h d him% .p, Sakhalm-Pnmg
OCE4nlc
Plates: FAR, Fadon; JF, Juan de Fuca; KULA, Kula; PAC,
[7 ab, Amerasia Basiniar, Anadyr; a&, Akutian-Bowers; bo,
Bowser; bu, Bureya; cb, Canada Basin; cf, Cordilleran
=L, Colages of various -&A tern- (some labeled);
CONTACTS AND FAULTS
( o l u h . d ~ c a r r i . d o r ~ ~ : ~
-)
- ---
B-B
mdtlonafo~sanicplale
SYMBOLS
Relative dke- and
Loti-
-
PLUTONlC BELTS
Conisionat granite beb: sl. &ifC n0.
0 om. Omtneca-Serwyn tr, ,-R,
West Verkhoyansk
-laled pluld mdrr: s&,
@ S&aWamWplutontc bell
FAULT MAE6
AD
AL m-
CACanWahoeAh
-
m-
cc--tw"-
CO Cones
HA HahDn
KA K-9
TE KE
WHpgll
M 13irconFadC
DE Darai RLRoaloke
FS ~4mdam~hw& =Queen Charlone-
Fa~rweather
$fi Sakhaltn-HOCkaldO
Teslln
KK l(adrirllu- n f~nbna
U Ulban
KO--
LE Lur
LM Ulak-
MWALLOGENIC MU
(4) The Sicker island arc was active along most of the length of the Wrangellia superterrane (WRA), wbith at thk the
was composed only of be Akxmckr sequence (AX) of the Wrangellia superterrane. Associated with the Sicker arc Was m
unknown subduction zone (UFIK). In the southern Canadian Cordillera today, the Sicker arc is defined by the Sicker Group which
consists of Late Devonian arc-related volcanic and sedimentary strata, having a U-Pb zircon age of 367 Ma, end coeval intrusiow
(Muh, 1980; Parish aod McNicoll, 1m). Occurring in the Alexander sequence (AX) was the Mount Sicka meta1logmi~ belt of
broko massive sulfide deposits which fonned in the subduction-related, short-lived Sicker arc. hufficie~ data exist to ascmih
he relative pmsitions of the WrangelKa superterrane (WRA) and associated subduction zone. On the his of paleomagneric,
geologic, geochroaologic, and faunal data, the Wrangellia superterrane (Alexander sequence, AX) may haw been defhtd fiota
the Russian platform (8dica) in the Bar& Sea region (Bazard and others, 1993, 1994) or possibly from Autmlia (&hld8 smd
Salerby, 1987).