Filters: Tags: Igneous Rocks (X)
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View west and downriver toward Vulcans Anvil Dike in river at Bright Angel Shale level, river mile 178.1.
View north and up basalt cascade down north side of canyon (photograph CI65) from river mile 185.1.
Basalt sill in Tapeats Sandstone (photograph CI31), north side of river mile 178.1.
View northeast toward Pleistocene basalt flows on east side of lower Prospect Canyon, about a half mile south of river mile 179.5.
CI76. View north into new Whitmore Canyon along Hurricane Fault filled with Pleistocene basalt flows
View north into new Whitmore Canyon along Hurricane Fault filled with Pleistocene basalt flows (photograph CI73).
Close-up view of Buck and Doe Conglomerate at base of 19-million-year (Ma) basalt flow on northwest side of Separation hill, west side of south Separation Canyon, Hualapai plateau.
Aerial view north toward 19-million-year (Ma) basalt flows that overlie Buck and Doe Conglomerate on west side of Milkweed Canyon.
Aerial view west toward northern Two Hundred and Twentyseven Mile intrusive in Watahomigi Formation, about 1.5 miles north of river mile 228.2. K-Ar age is 13.47±0.3 million years (Ma) (Wenrich and others, 1995).
U-Pb analyses were performed on igneous rocks from the Ray Mountains area of west-central Alaska. These new age analyses will allow us to better evaluate the geochronology of the granitic rocks that are the apparent source of the alluvial REE and tin resources. The plutonic samples have ages ranging from 98.0 +/- 0.9 Ma to 111.6 +/- 1.0 Ma. The sample location coordinates and analytical data tables associated with this report are available in digital format as comma-separated value (CSV) files.
This report provides detailed (1:63,360-scale) mapping of portions of U.S. Geological Survey Circle B-2 (1955), B-3 (1955), B-4 (1952), C-2 (1955), C-3 (1955), and C-4 (1952) quadrangles. The area is part of the Circle mining district and adjacent to the Fairbanks mining district. This report includes detailed geologic, structural, stratigraphic, and geochronologic data. Based on the resulting geologic maps, field investigations, and laboratory materials analyses, the project has also generated derivative maps of geologic construction materials and geologic hazards.
This data release includes laser ablation inductively coupled plasma mass spectrometry (LA-ICPMS) U-Pb zircon geochronology data to determine the ages of Challis igneous rocks in the Thunder Mountain volcanic field and dikes west of the volcanic field, especially in and near the Stibnite-Yellow Pine mining district, ID. These efforts were made to help understand the stratigraphy and lithologic characteristics of the Challis igneous rocks by determining their absolute ages.
Categories: Data;
Tags: Challis,
GGGSC,
Geochronology,
Geology, Geophysics, and Geochemistry Science Center,
Idaho,
These data provide geologic information, including generalized lithology, geologic age, and paleo-latitude and -longitude of geologic units, for the United States, Canada, and Australia, in an H3 Discrete Global Grid System (DGGS) hexagonal format (Uber Technologies Inc., 2020) with an average hexagon area of 5.16 square kilometers. The data are presented as the shapefile version of ASCII data developed by Lawley and others (2021) for prospectivity modeling of basin-hosted Pb-Zn mineralization in the United States, Canada, and Australia (Lawley and others, 2022). References Lawley, C.J.M., McCafferty, A.E., Graham, G.E., Gadd, M.G., Huston, D.L., Kelley, K.D., Paradis, S., Peter, J.M., and Czarnota, K., 2021, Datasets...
Categories: Data;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Australia,
CMMI,
Canada,
Critical Minerals Mapping Initiative,
Discrete Global Grid System,
These data present geologic map units for the United States (Horton and others, 2017; Wilson and others, 2015) and Australia (Raymond and others, 2012) reclassified to 31 generalized sub-type lithologic groups of igneous, metamorphic, and sedimentary rocks (Lawley and others, 2022). These generalized classifications are based on interpretation of map unit descriptions in the different map compilations. Given that map unit descriptions often contain multiple rock types, there were subjective calls necessary when assigning generalized lithologic classification. The data were developed as part of the tri-national Critical Minerals Mapping Initiative (Kelley, 2020) between the United States, Canada, and Australia, an...
Categories: Data;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Australia,
CMMI,
Critical Minerals Mapping Initiative,
Exploring for the Future Program,
GA,
This report provides detailed (1:63,360-scale) mapping of the Tanana B-1 Quadrangle (250 square miles; equivalent to four 7.5 minute quadrangles). The area is part of the Manley Hot Springs-Tofty mining districts and adjacent to the Rampart mining district to the north of the Tanana A-1 and A-2 Quadrangles. This report includes detailed bedrock, structural, stratigraphic, and geochronologic data. Based on the resulting geologic maps, field investigations, and laboratory materials analyses, the project has also generated derivative maps of geologic construction materials and geologic hazards.
This geologic map and report depicts portions of the Livengood B-3, B-4, C-3, and C-4 quadrangles. The Livengood area is a historically productive placer mining area approximately 80 road miles north of Fairbanks, Alaska. This report synthesizes recently collected and previously published agency and industry geologic data in a 1:50,000-scale comprehensive geologic map to build a better understanding of the geology and mineral-resource potential of the Livengood area. It expands and updates the Alaska Division of Geological & Geophysical Surveys (DGGS) Preliminary Interpretive Report (PIR) 2004-3 with the addition of new DGGS mapping and drillhole data from ITH, and integrates previously published DGGS surficial...
Aerial view southeast toward Quaternary basalt neck and pyroclastic deposits of Yumtheska Vent West, on Esplanade Sandstone, west side of Yumtheska Point.
View north down Tuckup Trail toward east side of Tuckup cinder cone and dike, western part of Tuckup Canyon.
Aerial view east toward Snap Point basalt flow over Kaibab Formation, south end of Snap Point, upper Grand Wash Cliffs. K-Ar age is 9.070±0.8 million years (Ma) (Billingsley and Wellmeyer, 2003).
Aerial view southwest toward diabase dikes of Music Mountain gold mine, Grand Wash Cliffs.
View of conglomerate overlain by basalt flow (19 million years [Ma]?) that is overlain by white and brown 18 Ma Peach Spring Tuff in northern tributary to upper Horse Flat Canyon.
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