Counties, states, countries, continents, or oceans | |
Yukon-Koyukuk | Census area |
Alaska | state |
United States | country |
North America | continent |
Land | continent |
Map quadrangles, from USGS or Canadian NTS | |
Medfra A-4 | 1:63,360 Alaska quadrangle |
Medfra | 1:250,000 Alaska quadrangle |
Watershed boundaries (USGS hydrologic units) | |
Stony River | hydrologic unit |
190304 | hydrologic accounting unit |
Yukon | hydrologic subregion |
Alaska | hydrologic region |
Map symbol | Lithology | Unit name |
---|---|---|
DZwp | Sedimentary | Farewell platform facies |
Kk | Sedimentary | Kuskokwim Group, undivided |
Qs | Unconsolidated | Unconsolidated surficial deposits, undivided |
TKgd | Igneous - Plutonic | Granodiorite to quartz monzodiorite |
ID | Data type | Description |
---|---|---|
Medfra '78 | M-D | Medfra '78 10702 line km with spacing 1.60 km over parts of AK |
Medfra | M/R-D | Medfra 2245 line km with spacing 9.60 km over parts of AK |
Tract | Deposit Type | Mineralization age |
---|---|---|
AK-WC22 | Polymetallic vein | |
AK-WC17 | Placer Au | |
AK-WC19 | Polymetallic replacement | |
AK-WC24 | Cu (Au) skarn | |
AK-WC26 | Zn-Pb skarn | |
AK-WC28 | Sedex Zn-Pb | |
AK-WC11 | Kipushi Cu-Pb-Zn | |
AK-WC13 | Mississippi Valley Type |
Domain | Crust type | Region |
---|---|---|
Farewell-McGrath | Passive margin | Alaska |
Lab ID | Sample medium | Description |
---|---|---|
AGC437 | soil | |
AGC438 | soil | |
AGC439 | soil | |
AGC440 | soil | |
AGC441 | soil | |
AGC442 | soil | |
AGC443 | soil | |
AGC444 | soil | |
AGC445 | soil | |
AGC446 | soil | |
AGC447 | soil | |
AGC448 | soil | |
AGC449 | soil | |
AGC450 | soil | |
AGC451 | soil | |
AGC452 | soil | |
AGC453 | soil | |
AGC454 | soil | |
AGC455 | soil | |
AGC456 | soil | |
AGC457 | soil | |
AGC458 | soil | |
AGC459 | soil | |
AGC460 | soil | |
AGC461 | soil | |
AGC462 | soil | |
AGC463 | soil | |
AGC464 | soil | |
AGC465 | soil | |
AGC466 | soil | |
AGC467 | soil | |
AGC468 | soil | |
AGC469 | soil | |
AGC470 | soil | |
AGC471 | soil | |
AGC472 | soil | |
AGC473 | soil | |
AGC474 | soil | |
AGC475 | soil | |
AGC476 | soil | |
AGC477 | soil | |
AGC478 | soil | |
AGC479 | soil | |
AGC480 | soil | |
AGC481 | soil | |
AGC482 | soil | |
AGC483 | soil | |
AGC484 | soil | |
AGC485 | soil | |
AGC486 | soil | |
AGC487 | soil | |
AGC488 | soil | |
AGC489 | soil | |
AGC490 | soil | |
AGC491 | soil | |
AGC492 | soil | |
AGC493 | soil | |
AGC494 | soil | |
AGC495 | soil | |
AGC496 | soil | |
AGC497 | soil | |
AGC498 | soil | |
AGC499 | soil | |
AGC500 | soil | |
AGC501 | soil | |
AGC502 | soil | |
AGC503 | soil | |
AGC504 | soil | |
AGC505 | soil | |
AGC506 | soil | |
AGC507 | soil | |
AGC508 | soil | |
AGC509 | soil | |
AGC510 | soil | |
AGC511 | soil | |
AGC512 | soil | |
AGC513 | soil | |
AGC514 | soil | |
AGC515 | soil | |
AGC516 | soil | |
AGC517 | soil | |
AGC518 | soil | |
AGC519 | soil | |
AGC520 | soil | |
AGC521 | soil | |
AGC522 | soil | |
AGC523 | soil | |
AGC524 | soil | |
AGC525 | soil | |
AGC526 | soil | |
AGC527 | soil | |
AGC528 | soil | |
AGC529 | soil | |
AGC530 | soil | |
AGC531 | soil | |
AGC532 | soil | |
AGC533 | soil | |
AGC534 | soil | |
AGC535 | soil | |
AGC536 | soil | |
AGC537 | soil | |
AGC538 | soil | |
AGC539 | soil | |
AGC540 | soil | |
AGC541 | soil | |
AGC542 | soil | |
AGC543 | soil | |
AGC544 | soil | |
AGC545 | soil | |
AGC546 | soil | |
AGC547 | soil | |
AGC548 | soil | |
AGC549 | soil | |
AGC550 | soil | |
AGC551 | soil | |
AGC552 | soil | |
AGC553 | soil | |
AGC554 | soil | |
AGC555 | soil | |
AGC556 | soil | |
AGC557 | soil | |
AGC558 | soil | |
AGC559 | soil | |
AGC560 | soil | |
AGC561 | soil | |
AGC562 | soil | |
AGC563 | soil | |
AGC564 | soil | |
AGC565 | soil | |
AGC566 | soil | |
AGC567 | soil | |
AGC568 | soil | |
AGC569 | soil | |
AGC570 | soil | |
AGC571 | soil | |
AGC572 | soil | |
AGC573 | soil | |
AGC574 | soil | |
AGC575 | soil | |
AGC576 | soil | |
AGC577 | soil | |
AGC578 | soil | |
AGC579 | soil | |
AGC580 | soil | |
AGC581 | soil | |
AGC582 | soil | |
AGC583 | soil | |
AGC584 | soil | |
AGC585 | soil | |
AGC586 | soil | |
AGC587 | soil | |
AGC588 | soil | |
AGC589 | soil | |
AGC590 | soil | |
AGC591 | soil | |
AGC592 | soil | |
AGC593 | soil | |
AGC594 | soil | |
AGC595 | soil | |
AGC596 | soil | |
AGC597 | soil | |
AGC598 | soil | |
AGC599 | soil | |
AGC600 | soil | |
AGC601 | soil | |
AGC602 | soil | |
AGC603 | soil | |
AGC604 | soil | |
AGC605 | soil | |
AGC606 | soil | |
AGC607 | soil | |
AGC608 | soil | |
AGC609 | soil | |
AGC610 | soil | |
AGC611 | soil | |
AGC612 | soil | |
AGC613 | soil | |
AGC614 | soil | |
AGC615 | soil | |
AGC616 | soil | |
AGC617 | soil | |
AGC618 | soil | |
AGC619 | soil | |
AGC620 | soil | |
AGC621 | soil | |
AGC622 | soil | |
AGC623 | soil | |
AGC624 | soil | |
AGC625 | soil | |
AGC626 | soil | |
AGC627 | soil | |
AGC628 | soil | |
AGC629 | soil | |
AGC630 | soil | |
AGC631 | soil | |
AGC632 | soil | |
AGC633 | soil | |
AGC634 | soil | |
AGC635 | soil | |
AGC636 | soil | |
AGC637 | soil | |
AGC638 | soil | |
AGC639 | soil | |
AGC640 | soil | |
AGC641 | soil | |
AGC642 | soil | |
AGC643 | soil | |
AGC644 | soil | |
AGC645 | soil | |
AGC646 | soil | |
AGC647 | soil | |
AGC648 | soil | |
AGC649 | soil | |
AGC650 | soil | |
AGC651 | soil | |
AGC652 | soil | |
AGC653 | soil | |
AGC654 | soil | |
AGC655 | soil | |
AGC656 | soil | |
AGC657 | soil | |
AGC658 | soil | |
AGC659 | soil | |
AGC660 | soil | |
AGC661 | soil | |
AGC693 | soil | |
BFG171 | concentrate | panned C1 fraction |
BFN642 | concentrate | panned C3 fraction |
BFN647 | concentrate | panned C3 fraction |
BFN688 | concentrate | panned C3 fraction |
BFN819 | concentrate | panned C3 fraction |
BFN847 | concentrate | panned C3 fraction |
BFN917 | concentrate | panned C3 fraction |
CCS060 | sediment | |
CCS061 | sediment | |
CCS128 | rock | igneous granodiorite |
CCS129 | rock | igneous felsic porphyry |
CCS130 | rock | igneous quartz monzonite |
CCS132 | rock | igneous granite |
CCS215 | rock | metamorphic breccia |
CCS216 | rock | igneous felsic porphyry |
CCS217 | rock | igneous granite |
CCS218 | rock | metamorphic breccia |
CCS219 | rock | igneous quartz monzonite |
CCS220 | rock | igneous quartz monzonite |
CCS221 | rock | igneous quartz monzonite |
CCS222 | rock | metamorphic skarn |
CCS223 | rock | igneous unspecified |
CCS224 | rock | igneous quartz porphyry |
CCS225 | rock | sedimentary limestone |
CCS226 | rock | sedimentary limestone |
CCS227 | rock | |
CCS228 | rock | sedimentary limestone |
CCS229 | rock | igneous quartz monzonite |
CCS230 | rock | metamorphic skarn |
CCS231 | rock | |
CCS232 | rock | metamorphic unspecified |
CCS233 | rock | metamorphic skarn |
CCS234 | rock | metamorphic skarn |
CCS235 | rock | igneous felsic porphyry |
CCS236 | rock | sedimentary conglomerate |
CCS237 | rock | metamorphic marble |
CCS238 | rock | sedimentary limestone |
CCS355 | rock | igneous monzonite |
CCS356 | soil | |
CCS357 | rock | igneous granite |
CCS358 | rock | igneous unspecified |
CCS359 | rock | metamorphic skarn |
CCS360 | rock | igneous unspecified |
CCS361 | rock | igneous intermediate porphyry |
CCS362 | rock | igneous unspecified |
CCS363 | rock | igneous monzonite |
CCS364 | rock | metamorphic skarn |
CDF688 | concentrate | panned C3 fraction |
CDF689 | concentrate | panned C3 fraction |
CDJ229 | concentrate | panned C2 fraction |
CDJ230 | concentrate | panned C2 fraction |
CEF380 | rock | igneous intermediate porphyry |
CEF381 | rock | igneous intermediate porphyry |
D152729 | concentrate | panned C3 fraction |
D152734 | concentrate | panned C3 fraction |
D153366 | concentrate | panned C3 fraction |
D153607 | concentrate | panned C3 fraction |
D153652 | concentrate | panned C3 fraction |
D153819 | concentrate | panned C3 fraction |
D153897 | concentrate | panned C3 fraction |
D153972 | concentrate | panned C3 fraction |
M137798 | rock | igneous quartz monzonite |
M138733 | mineral | |
M138734 | mineral | |
M138888 | mineral | |
M139074 | mineral |
Sample ID | Date collected | Sample type |
---|---|---|
7014989 | 1977-08-10 | Wet stream sediment sample dried at less than or equal to 100øC and sieved to -100 mesh through stainless steel sieves. |
Sample ID | Date collected | Sample type |
---|---|---|
3016082 | 1977-08-10 | Stream water sample acidified to a pH of less than or equal to 1 with reagent-grade nitric acid. |
Sample ID | Rock type | Rock name |
---|---|---|
CCS128 | igneous | granodiorite |
CCS129 | igneous | felsic porphyry |
CCS130 | igneous | granite |
CCS132 | igneous | granite |
CCS215 | unspecified | breccia |
CCS216 | igneous | felsic porphyry |
CCS217 | igneous | granite |
CCS218 | unspecified | breccia |
CCS219 | igneous | quartz monzonite |
CCS220 | igneous | quartz monzonite |
CCS221 | igneous | quartz monzonite |
CCS222 | metamorphic | skarn |
CCS223 | igneous | unspecified |
CCS224 | igneous | quartz porphyry |
CCS225 | sedimentary | limestone |
CCS226 | sedimentary | limestone |
CCS227 | unspecified | |
CCS228 | sedimentary | limestone |
CCS229 | igneous | quartz monzonite |
CCS230 | metamorphic | skarn |
CCS231 | unspecified | |
CCS232 | metamorphic | unspecified |
CCS233 | metamorphic | skarn |
CCS234 | metamorphic | skarn |
CCS235 | igneous | felsic porphyry |
CCS236 | sedimentary | conglomerate |
CCS237 | metamorphic | marble |
CCS238 | sedimentary | limestone |
CCS355 | igneous | monzonite |
CCS357 | igneous | granite |
CCS358 | igneous | unspecified |
CCS359 | metamorphic | skarn |
CCS360 | igneous | grus |
CCS361 | igneous | intermediate porphyry |
CCS362 | igneous | grus |
CCS363 | igneous | monzonite |
CCS364 | metamorphic | skarn |
CEF380 | igneous | intermediate porphyry |
CEF381 | igneous | intermediate porphyry |
Site name | Development | Commodities |
---|---|---|
Encio Gulch (formerly Riddle Gulch) | Past Producer | AU AG BI W |
Whalen | Past Producer | AG AU CU BI TH U W |
Crystal Gulch | Past Producer | AG AU BI SN U |
Nixon Fork - Crystal | Past Producer | AG AU BI CU W |
Hidden Creek: Grable and Blackburn Mine | Past Producer | AG AU BI SN TH W |
Whalen Shaft | Past Producer | AG AU CU BI W |
Nixon Fork | Producer | AG AU CU BI TH U W |
Hidden Creek Placer | Past Producer | AU BI W |
Upper Ruby Creek | Past Producer | AG AU BI TH W |
Riddle Gulch | Past Producer | AU |
Crystal Gulch | Past Producer | AU BI |
Nixon Fork Mine | Plant | AU CU BI W |
Birch-Holmes Gulch Ridge | Prospect | U |
Medfra Road 8-9 Mile | Prospect | U |
Encio Gulch | Prospect | U |
Site | Status | Commodities |
---|---|---|
Encio Gulch (formerly Riddle Gul... | Inactive | Au |
Nixon Fork; Mespelt; Crystal; Ga... | Probably inactive | Ag;Au;Cu |
Whalen Shaft | Active | Ag;Au;Cu |
Hidden Creek: Grable and Blackbu... | Inactive | Ag;Au |
Whalen; Whalen and Griffin | Inactive | Ag;Au;Cu |
Upper Ruby Creek | Inactive | Ag;Au |
Crystal Gulch | Inactive | Ag;Au |
Holmes Gulch | Inactive | Ag;Au |
Birch Gulch (Creek); Groshong's ... | Inactive | Ag;Au |
Sample ID | Sample source | Sample notes |
---|---|---|
BFG171 | stream/river | stream |
BFN642 | stream/river | stream |
BFN647 | stream/river | stream |
BFN688 | stream/river | stream |
BFN819 | stream/river | stream |
BFN847 | stream/river | stream |
BFN917 | stream/river | stream |
CDF688 | stream/river | stream |
CDF689 | stream/river | stream |
CDJ229 | stream/river | stream |
CDJ230 | stream/river | stream |
D152729 | stream/river | stream |
D152734 | stream/river | stream |
D153366 | stream/river | stream |
D153607 | stream/river | stream |
D153652 | stream/river | stream |
D153819 | stream/river | stream |
D153897 | stream/river | stream |
D153972 | stream/river | stream |
Tract name | Deposit type | Geology |
---|---|---|
Yukon-Tanana Upland | porphyry copper | Kluane Arc and Tertiary Kuskokwim Mountains volcanic-plutonic belt (continuation of Canadian Cordilleran continental arc); north of the Denali Fault |
Western Alaska Range | porphyry copper | Cretaceous porphyry prospects along the Kahiltna Basin-Peninsula terrane boundary |
Pacific Margin | porphyry copper | Cretaceous through middle Tertiary volcanic and intrusive rocks representing a series of continental- and island-arc systems accreted and superimposed onto the paleomargin of northeast Asia. |