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- Willow_Creek_mining_district abstract "The Willow Creek mining district, also known as the Independence Mine/Hatcher Pass district, is a gold-mining area in the U.S. state of Alaska. Underground hard-rock mining of gold from quartz veins accounts for most of the mineral wealth extracted from the Hatcher Pass area. The first mining efforts were placer mining of stream gravels, and placer mining in the area has continued sporadically to this day. Robert Hatcher discovered gold and staked the first claim in the Willow Creek valley in September 1906. The first lode mill in the area started operating in 1908. Underground mining continued at a variety of locations around the pass until 1951. In the 1980s one of the area's hard-rock mines was briefly re-opened. At least one mining company is actively exploring for gold in the area now.Through 2006 the district produced 667-thousand ounces of hard rock gold and 60-thousand ounces of placer gold.The Willow Creek district at Hatcher Pass is historically the third-largest lode-gold producing district in Alaska, having produced 624,000 oz of gold.At Hatcher Pass proper the southwestern margin of the Cretaceous to Tertiary age Talkeetna Mountains batholith is in fault contact with a pelitic schist. The Talkeetna Mountains batholith in this area consists of a pervasively altered zoned 74 Ma (million years old) tonalite body underlying Hatcher Pass and the headwaters of Willow Creek, and a 67 Ma quartz monzonite pluton farther west. The schist to the south consists mainly of metamorphosed and deformed sedimentary rocks, of Late Cretaceous to Paleocene age. The schist may represent subducted Valdez Group that was exhumed in the forearc region from beneath the Peninsular terrane. Both deformed and undeformed small felsic dikes occur in the schist. Several bodies of serpentinite are contained within the schist. Unmetamorphosed Late Cretaceous or Tertiary terrestrial sedimentary rocks of the Arkose Ridge Formations lie to the south of the schist and intrusives, across a low-angle detachment fault. Those bedded rocks are derived from the schists and intrusive rocks to the north. A rock unit variously mapped as as intricately intermixed amphibolite and quartz diorite; or as a migmatite, occurs in contact with the Arkose Ridge formation on Government Peak and in contact with the Arkose Ridge Formation and quartz monzanite east of the Little Susitna River. It is not clear if the migmatite is a higher-metamorphic-grade equivalent of the schist. Gold-bearing (+/- Ag, W, Sb, As, Cu, Mo, Pb, Te, Zn, Hg) veins occur in the tonalite, in small amounts in the schist, and in the Jurassic? migmatite, but not in the western quartz monzonite or in the Tertiary sediments. Most of the mineral deposits are close to the tonalite-schist contact.".
- Willow_Creek_mining_district thumbnail Hatcherpassmine.JPG?width=300.
- Willow_Creek_mining_district type Alaska_Mining_District.
- Willow_Creek_mining_district wikiPageID "16539594".
- Willow_Creek_mining_district wikiPageLength "7636".
- Willow_Creek_mining_district wikiPageOutDegree "33".
- Willow_Creek_mining_district wikiPageRevisionID "678876570".
- Willow_Creek_mining_district wikiPageWikiLink Alaska.
- Willow_Creek_mining_district wikiPageWikiLink Alaska_Mining_District.
- Willow_Creek_mining_district wikiPageWikiLink Batholith.
- Willow_Creek_mining_district wikiPageWikiLink Category:Geography_of_Matanuska-Susitna_Borough,_Alaska.
- Willow_Creek_mining_district wikiPageWikiLink Category:Gold_mining_in_Alaska.
- Willow_Creek_mining_district wikiPageWikiLink Cretaceous.
- Willow_Creek_mining_district wikiPageWikiLink Deformation_(engineering).
- Willow_Creek_mining_district wikiPageWikiLink Dorothy_Page_Museum_and_Old_Wasilla_Townsite.
- Willow_Creek_mining_district wikiPageWikiLink Gold_mining.
- Willow_Creek_mining_district wikiPageWikiLink Gold_mining_in_Alaska.
- Willow_Creek_mining_district wikiPageWikiLink Hatcher_Pass.
- Willow_Creek_mining_district wikiPageWikiLink Independence_Mine_State_Historical_Park.
- Willow_Creek_mining_district wikiPageWikiLink Independence_Mines.
- Willow_Creek_mining_district wikiPageWikiLink Landform.
- Willow_Creek_mining_district wikiPageWikiLink Lode.
- Willow_Creek_mining_district wikiPageWikiLink Metamorphic_rock.
- Willow_Creek_mining_district wikiPageWikiLink Metamorphosed.
- Willow_Creek_mining_district wikiPageWikiLink Monzonite.
- Willow_Creek_mining_district wikiPageWikiLink No%5E.
- Willow_Creek_mining_district wikiPageWikiLink Pelite.
- Willow_Creek_mining_district wikiPageWikiLink Pelitic.
- Willow_Creek_mining_district wikiPageWikiLink Quartz.
- Willow_Creek_mining_district wikiPageWikiLink Scheelite.
- Willow_Creek_mining_district wikiPageWikiLink Schist.
- Willow_Creek_mining_district wikiPageWikiLink Talkeetna_Mountains.
- Willow_Creek_mining_district wikiPageWikiLink Tellurium.
- Willow_Creek_mining_district wikiPageWikiLink Tertiary.
- Willow_Creek_mining_district wikiPageWikiLink Tonalite.
- Willow_Creek_mining_district wikiPageWikiLink Tungsten.
- Willow_Creek_mining_district wikiPageWikiLink Wasilla,_Alaska.
- Willow_Creek_mining_district wikiPageWikiLink Wikt:Ma.
- Willow_Creek_mining_district wikiPageWikiLink File:Hatcherpassmine.JPG.
- Willow_Creek_mining_district wikiPageWikiLink File:Hatcherpassmodern.JPG.
- Willow_Creek_mining_district wikiPageWikiLinkText "Willow Creek mining district".
- Willow_Creek_mining_district hasPhotoCollection Willow_Creek_mining_district.
- Willow_Creek_mining_district latd "61".
- Willow_Creek_mining_district latm "47".
- Willow_Creek_mining_district latns "N".
- Willow_Creek_mining_district longd "149".
- Willow_Creek_mining_district longew "W".
- Willow_Creek_mining_district longm "15".
- Willow_Creek_mining_district name "Willow Creek mining district".
- Willow_Creek_mining_district pushpinLabelPosition "left".
- Willow_Creek_mining_district pushpinMap "Alaska".
- Willow_Creek_mining_district settlementType Alaska_Mining_District.
- Willow_Creek_mining_district wikiPageUsesTemplate Template:Convert.
- Willow_Creek_mining_district wikiPageUsesTemplate Template:Infobox_Settlement.
- Willow_Creek_mining_district wikiPageUsesTemplate Template:Reflist.
- Willow_Creek_mining_district subject Category:Geography_of_Matanuska-Susitna_Borough,_Alaska.
- Willow_Creek_mining_district subject Category:Gold_mining_in_Alaska.
- Willow_Creek_mining_district hypernym Area.
- Willow_Creek_mining_district point "61.78333333333333 -149.25".
- Willow_Creek_mining_district type Place.
- Willow_Creek_mining_district type PopulatedPlace.
- Willow_Creek_mining_district type Settlement.
- Willow_Creek_mining_district type Location.
- Willow_Creek_mining_district type Place.
- Willow_Creek_mining_district type Thing.
- Willow_Creek_mining_district type SpatialThing.
- Willow_Creek_mining_district type Q486972.
- Willow_Creek_mining_district comment "The Willow Creek mining district, also known as the Independence Mine/Hatcher Pass district, is a gold-mining area in the U.S. state of Alaska. Underground hard-rock mining of gold from quartz veins accounts for most of the mineral wealth extracted from the Hatcher Pass area. The first mining efforts were placer mining of stream gravels, and placer mining in the area has continued sporadically to this day.".
- Willow_Creek_mining_district label "Willow Creek mining district".
- Willow_Creek_mining_district sameAs m.03y9fvj.
- Willow_Creek_mining_district sameAs Q8022305.
- Willow_Creek_mining_district sameAs Q8022305.
- Willow_Creek_mining_district lat "61.78333333333333".
- Willow_Creek_mining_district long "-149.25".
- Willow_Creek_mining_district wasDerivedFrom Willow_Creek_mining_district?oldid=678876570.
- Willow_Creek_mining_district depiction Hatcherpassmine.JPG.
- Willow_Creek_mining_district isPrimaryTopicOf Willow_Creek_mining_district.
- Willow_Creek_mining_district name "Willow Creek mining district".