Geology of uranium deposits in the Dripping Spring Quartzite, Gila County, Arizona

Abstract

__________________ 472 Lucky Boy deposit______________________________ Sky deposit________________________________ 473 Roosevelt quadrangle area________________-__-____________ Blevins Canyon deposit___________________________________ 473 Fairview deposit.-______________________________________ 474 Great Gain deposit___________________________ ________ 475-,. Other deposits. __________________________________________ 475 Black Brush deposit_____________________________________

Sulfur isotopic evidence of diabase-granophyre-sedimentary rocks interaction, Sierra Ancha, central Arizona.

“…Many small uranium deposits are localized in the gray unit of the Dripping Spring Quartzite near its contacts with diabase intrusions RAUP, 1959), andNEUERBURG andGRANGER (1960) hypothesized that the uranium was carried by deuteric fluids drained from the cooling intrusions.…”

Mineral occurrence map and tabulation of geologic, commodity, and production data, Ajo and Lukeville 1 degree by 2 degrees quadrangles, southwestern Arizona

“…In additlo-v Mo, Be, W, V, Nb, and Zr may be useful geochemical indicator elements (Walker and Adams, 1963). A different type of uranium vein, currently known only from outside the quadrangle, is found in the Dripping Spring Quartzlte (Granger and Raup, 1959;Nutt, 1982).…”

“…About 200 km northeast of the quadrangle In GfLa County, Ariz., the Dripping Spring Quartzite, one formation in the Apache Group, contains uranium deposits (Granger and Raup, 1959). In the Vekol Mountains, the diabase Is an important host for porphyry style mineralization at the Vekol Hills porphyry copper deposit (Steele, 1978).…”

“…A recent study (Nutt, 1982) of the uranium mineralization in the Dripping Spring Quartzite indicates that primary diagenetic-sedlmentary uranium concentrations were metamorphosed and altered. Previously, it had been thought that the deposits resulted from hydrothermal fluids that accompanied diabase intrusion (Granger and Raup, 1959). The upper member of the Dripping Spring Quartzite, host for the uranium mineralization, Is a volcaniclastic sedimentary sequence that was deposited in a nearshore saline environment (Nutt, 1982).…”

“…The Middle Proterozoic Dripping Spring Ouartzite, which crops out locally In the northeastern part of the quadrangle, hosts many uranium veins (Granger and Raup, 1959), most of which are in Glla County, Ariz., about 200 km northeast of the quadrangle. A recent study (Nutt, 1982) of the uranium mineralization in the Dripping Spring Quartzite indicates that primary diagenetic-sedlmentary uranium concentrations were metamorphosed and altered.…”