Counties, states, countries, continents, or oceans | |
Juneau | Borough |
Alaska | state |
United States | country |
North America | continent |
Land | continent |
Map quadrangles, from USGS or Canadian NTS | |
Juneau B-2 | 1:63,360 Alaska quadrangle |
Juneau | 1:250,000 Alaska quadrangle |
Watershed boundaries (USGS hydrologic units) | |
Lynn Canal | hydrologic unit |
190103 | hydrologic accounting unit |
Arctic Slope | hydrologic subregion |
Alaska | hydrologic region |
Map symbol | Lithology | Unit name |
---|---|---|
KJgn | Sedimentary | Gravina-Nuzotin unit |
MzPzss | Metamorphic | Metasedimentary and minor metavolcanic rocks along the west side of the Coast plutonic complex of Brew and Morrell (1979b) |
MzPzsv | Metamorphic | Metavolcanic rocks west of the Coast plutonic complex of Brew and Morrell (1979b) |
Qs | Unconsolidated | Unconsolidated surficial deposits, undivided |
w | Water |
ID | Data type | Description |
---|---|---|
Juneau '82 | M-D | Juneau '82 6598 line km with spacing 1.60 km over parts of AK |
Juneau | M/R-D | Juneau 1319 line km with spacing 9.60 km over parts of AK |
Tract | Deposit Type | Mineralization age |
---|---|---|
AK-SE05 | Sierran Kuroko mass. sulf. | |
AK-SE03 | Low-sulfide Au-quartz veins |
Domain | Crust type | Region |
---|---|---|
Taku | Passive margin | Alaska |
Lab ID | Sample medium | Description |
---|---|---|
CFT245 | rock | metamorphic quartzite |
CFT246 | rock | igneous intermediate |
CFT247 | rock | metamorphic quartzite |
CFT256 | sediment | |
CFT257 | sediment | |
CHV448 | rock | metamorphic greenschist |
M175072 | rock | metamorphic greenschist |
Sample ID | Rock type | Rock name |
---|---|---|
CFT245 | metamorphic | quartzite |
CFT246 | igneous | intermediate |
CFT247 | metamorphic | quartzite |
Site name | Development | Commodities |
---|---|---|
Douglas Island Deposit | Producer | V CR CU PGE SC NI CO |
Alaska-Juneau Mill Dump | Prospect | AU PB ZN W |
A-J Mill Reclaim | Past Producer | AU |
A and J Pit | Past Producer | SDG STN |
Site | Status | Commodities |
---|---|---|
Alaska-Juneau Tailings; AJ Mill ... | Active | Ag;Au;Cu;Pb |
Sample ID | Sample source | Sample notes |
---|---|---|
CFT256 | mine dump/waste rock | mill tailings; |
CFT257 | mine dump/waste rock | mill tailings; |
Tract name | Deposit type | Geology |
---|---|---|
Late Continental Arc | porphyry copper | Porphyry Cu systems associated with predominantly calc-alkalic igneous rocks of post-accretionary continental magmatic arcs (Oligocene-Pliocene) |
Intermontane Island-Arc | porphyry copper | Porphyry Cu systems associated with pre-accretionary Triassic and Jurassic calc-alkalic island arcs that formed offshore of western North America |
Intermontane Island-Arc Cu-Au | porphyry copper | Triassic and Jurassic alkalic igneous rocks of accreted island arcs that formed offshore of western North America |
Insular Mixed Island- and Continental Arc | porphyry copper | Calc-alkalic igneous rocks of accreted Jurassic island-arc terranes |
Cordilleran Continental Arc | porphyry copper | Porphyry Cu systems associated with predominantly calc-alkalic igneous rocks of post-accretionary continental magmatic arcs (Jurassic-Eocene) |
Southeast Alaska Tertiary | porphyry copper | Tertiary subduction and postsubduction calc-alkalic plutons of southeast Alaska |
Alaska Peninsula and Aleutian Islands | porphyry copper | Tertiary felsic to intermediate composition intrusions of the Alaska Peninsula and Aleutian Islands |
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. |