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Research about Nabesna Quadrangle

Source-linked reports with geographic coverage including Nabesna Quadrangle.

3 recordsLinked to original sources
USGS1975

Aeromagnetic map of the Nabesna Quadrangle, Alaska

The aeromagnetic map (sheet 1) of the Nabesna quadrangle was prepared in 1971 and subsequently released by the State of Alaska as an open-file map (Alaska Div. Geol. and Geophysics, 1973). The data were collected along north-south traverses spaced at 1.6 km intervals at an altitude of 330 m (1000 ft) above the ground. Compilation was originally in the form of 30' x 15' quadrangles at a scale of 1:63,360; these quadrangles have been combined and reduced to form the present map at a scale of 1:250,000. Contour interval is 10, 20, 100, or 500 gammas, depending on the local range in the earth's magnetic field.

Alaska↗
USGS1975

Gravity map of the Nabesna Quadrangle, Alaska

The gravity map of the Nabesna quadrangle indicates significant variations in the densities and thicknesses of the rock units that underlie the quadrangle. Most of this gravity relief is indirectly related to regional topographic relief or lithologic variations that are revealed in the rock outcrops. However, some significant features of the gravity map are not easily explained by the map geology, and several important features on the geologic map seem to have little gravitational expression. These failures in correlation suggest that there may be considerable differences between the deep and shallow structures of the quadrangle. Understanding these differences may eventually alter the present estimates of the quadrangle's mineral potential.

Alaska↗