Geologic investigation of the Western Tanacross and Taylor Mountain areas, Tanacross and Eagle quadrangles, Alaska

Geologic investigation of the Western Tanacross and Taylor Mountain areas, Tanacross and Eagle quadrangles, Alaska, Preliminary Interpretive Report 2024-6, presents a bedrock geological map of a 4,450-sq-km (1,720-sq-mi) area in eastern Interior Alaska around Mosquito Flats, herein called the Western Tanacross project, and a 2,320-sq-km (900-sq-mi) area around Taylor Mountain and the Mosquito Fork of the Fortymile River, herein called the Taylor Mountain project. The Western Tanacross project area straddles the Alaska Highway northwest of Tok, Alaska and includes most of the Tanacross Quadrangle not previously mapped by DGGS. The Taylor Mountain project lies south and west of Chicken, Alaska and straddles the Taylor Highway northeast of Tok, Alaska. The project includes a portion of the northern Tanacross Quadrangle as well as parts of the southern Eagle Quadrangle. DGGS and the U.S. Geological Survey (USGS) identified these map areas as having the potential to host deposits of multiple critical minerals, as well as conventional mineral resources, including gold, copper, molybdenum, lead, zinc, and silver. Most of the known mineralization in both project areas is related to Mesozoic-Paleogene magmatism, which includes diverse compositions, emplacement depths, and varying intrusion sizes. Igneous rocks intrude a composite metamorphic province that includes both parautochthonous North America and the allochthonous Yukon Tanana Terrane, which are both multiply deformed and apparently juxtaposed along low-angle faults. The complete report, geodatabase, and ESRI fonts and style files are available from the Alaska Division of Geological & Geophysical Surveys website: http://doi.org/10.14509/31166.

Tags: amphibolite, andesite, atwater creek, basalt, batholith, big timber creek, billy creek, buckskin creek, bullion creek, cedar creek, cement creek, cenozoic, clearwater creek, conglomerate, copper creek, correlation, cretaceous, dacite, dennison fork, devonian, dggs, diamond mountain, dike, diorite, felsic, fish creek, fish lake, folding, folds, fossils, gabbro, geologic, george creek, gneiss, gold, gold creek, granite, granodiorite, graphite, greenschist, greenstone, hornfels, hutchinson creek, igneous, ingle creek, interpretation, intrusive, jurassic, kechumstuk creek, kechumstuk mountain, lake mansfield, late cretaceous, liberty creek, lilliwig creek, logging cabin creek, mansfield creek, mansfield village, marble, metamorphic, metamorphism, minerals, mississippian, monzodiorite, monzonite, moose creek, mosquito creek, mosquito flats, mosquito fork, mount neuberger, mount warbelow, mudstone, myers fork, old man creek, orthogneiss, paleogene, paleozoic, pegmatite, permian, phyllite, plutonic, plutons, porphyry, porphyry creek, proterozoic, quartzite, regional, rhyolite, rocks, sand creek, sandstone, schist, sediment, sedimentary, siltstone, silver, sixtymile butte, square lake, stibnite creek, stratigraphy, syenite, t lake, tanana river, taylor creek, taylor mountain, telegraph creek, tom paine creek, tomato creek, tonalite, trachyandesite, trachybasalt, trachyte, tremolite, triassic, trondhjemite, tuff, tushtena pass, ultramafic, volcanic, white creek, willow creek, wilson creek, wolf creek, wolf lake, yerrick creek
Organization: State of Alaska