Geologic notes on Granite Mountain, Mount Hayes D-3 Quadrangle, Alaska
Dates
Publication Date
2014
Time Period
2006
Time Period
2007
Time Period
2014
File Modification Date
2014-12-03 12:43:00
Citation
Solie, D.N., and Werdon, M.B., 2014, Geologic notes on Granite Mountain, Mount Hayes D-3 Quadrangle, Alaska: Alaska Division of Geological & Geophysical Surveys, http://dx.doi.org/10.14509/29141.
Summary
In 2006-2007, Alaska Division of Geological & Geophysical Surveys (DGGS) geologists traversed and collected rock samples from ridges on the north side of Granite Mountain in the Mount Hayes D-3 Quadrangle to supplement existing literature with additional details about the variations in texture, lithology and orientation of the 'Granite of Granite Mountain' (map unit grgm) described by Nokleberg and others (1992). The digital data files for this report provide station locations and observations recorded in the geologists' field notes. Outcrop observations describe fine- to medium-grained granodiorite and medium- to coarse-grained tonalite units which appear to be in contact with each other on the ridges north of Granite Mountain. Mafic [...]
Summary
In 2006-2007, Alaska Division of Geological & Geophysical Surveys (DGGS) geologists traversed and collected rock samples from ridges on the north side of Granite Mountain in the Mount Hayes D-3 Quadrangle to supplement existing literature with additional details about the variations in texture, lithology and orientation of the 'Granite of Granite Mountain' (map unit grgm) described by Nokleberg and others (1992). The digital data files for this report provide station locations and observations recorded in the geologists' field notes. Outcrop observations describe fine- to medium-grained granodiorite and medium- to coarse-grained tonalite units which appear to be in contact with each other on the ridges north of Granite Mountain. Mafic enclaves are common; mafic and felsic dikes transect the plutonic rocks. Slices of quartzite are either in faulted or intrusive contact within the pluton.
DGGS conducted a multi-year project (from 2006 through 2010) studying the geology and geologic hazards along the Alaska Highway corridor. As part of the bedrock geologic mapping, traverses were conducted in the corridor on the north side of Granite Mountain. DGGS is publishing bedrock geologic maps of the Alaska Highway corridor farther east, from the Little Gerstle River area to the Canada border as three separate maps (Werdon and others, in press, Little Gerstle River to Dot Lake; Werdon and others, in press, Dot Lake to Tetlin Junction; Solie and others, in press, Tetlin Junction to Canada border). This report covers bedrock geologic observations between Delta Junction and Little Gerstle River, for an area not included in the map areas described above.
