Reconnaissance of the Jabal Khida quadrangle shows that granite and granodiorite (unit gg), biotite and hornblende granite (unit gr) and alkalic and paralkalic granit (unit gp) divisions for granites seems valid, but that two ages of metamorphic and extrusive rocks are mapped as the Halaben formation (unit ha/hc).
Semiquantitative analyses of 113 samples collected in the quadrangle were made spectrographically on minus 30 plus 80 mesh wadi sand for 27 elements, and chemically on concentrates of heavy minerals and magnetite from wadi sand. Anomalous amounts of silver, beryllium, molybdenum, niobium, tin, cobalt, chromium, copper, lead, nickel, titanium, and vanadium are found in the sand samples, but the anomalies are low. Anomalous tungsten is present in some concentrates from wadi sand.
A small alkalic and paralkalic granite (gp) at the west side of the quadrangle contains tin, niobium, and a low anomaly of lead. The area should be studied for commercial tin and niobium. Beryllium is in the granite and granodiorite (gg) adjacent to the alkalic granite. Concentrates from wadi sand derived from two alkalic granite (gp) bodies in the north-central part of the quadrangle contain 330 ppm tungsten.
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USGS Numbered Series
A mineral reconnaissance of the Jabal Khida quadrangle, Saudi Arabia