Geology Reports⌕ Search

Geology topics

S. Anthony Stanin

Publications and source records attributed to S. Anthony Stanin.

5 recordsLinked to original sources
USGS1975

Geochemical prospecting for copper and nickel in the Wulgai and Tor Tangi areas southeast of Hindubagh, Quetta Division, Pakistan

Showings of magnetite, copper, and possible nickel mineralization in the Hindubagh chromite mining district are near Wulgai and Tor Tangi. Several hundred samples of clastic material from dry streambeds in these areas were sieved for the minus-80-mesh fraction and analyzed for copper using 2, 2'-biquinoline and for nickel using alpha-furildioxime. The copper threshold is 75 ppm, and the nickel threshold is 400 ppm. A geochemical map has been prepared that shows nine areas of anomalously high copper and six areas of high nickel. The nickel anomalies may represent secondary dispersion patterns derived from the erosion of nickeliferous ultramafic rocks of the Hindubagh intrusive complex. Copper showings in and near four of the anomalous copper areas indicate that detailed geological investigation and detailed geochemical sampling of rocks, soil, and unconsolidated clastic material are required to determine the source of the anomalies.

Open-File Report↗
USGS1975

Geochemical prospecting for soluble salts in Kuchakki hamun, Chagai District, Pakistan

The surface soil consisting of clay, silt, sand, and salt crust in Kuchakki hamun (dry lake) contains nitrates, sulfates, salts of boron, magnesium, and widely dispersed traces of potassium. No bromine or iodine salts were detected. Several hundred samples of soil were analyzed by spot-test methods, and the results were given comparative weighted-qualitative values. Isohaline-type geochemical maps, based on weighted-qualitative values, were prepared to show the dispersion patterns of boron, magnesium, potassium, nitrates, and sulfates in Kuchakki hamun. Boron and magnesium salts are concentrated in the southern and southeastern part of the hamun. Nitrates and sulfates are more widely distributed and have higher concentrations in the central area of Kuchakki hamun. More detailed qualitative work and quantitative studies on material collected in Kuchakki hamun are required to appraise the reliability of applied field methods and preliminary analytical data, and to determine the presence, abundance, and grade of economically important salts.

Chagai District↗
USGS1975

Stratigraphy and mineralogy of laterite beds near Ziarat, Quetta Division, Pakistan

Ferruginous aluminous laterite beds crop out in the Ziarat-Loralai area east of Quetta for a strike length of about 60 miles. The beds are steeply dipping, sometimes overturned and faulted, and have an average thickness of 8 feet. Detailed mineralogical and chemical analyses were made on chip-channel samples from four sections of the laterite in the vicinity of the village of Ziarat. One of the sections, 9 1/2 miles southeast of Ziarat, is 21 feet thick and has an average content of 42 percent available alumina, 3.6 percent silica, and 31 percent Fe 2 0 3 . The other sections have an average available alumina content of less than 32 percent. The alumina minerals present are mostly boehmite and diaspore, with minor amounts of kaolinite. The laterite beds, which are between the Dunghan Formation of Paleocene age and the Parh Limestone of Cretaceous age, appear to mark the Cretaceous-Tertiary boundary; if this relationship is confirmed by further work, it would be of considerable assistance in prospecting for aluminous rocks in this and other parts of Pakistan.

Ziarat↗
USGS1968

The Mt. Montro kyanite deposit, Grand Bassa County, Liberia

The Mt. Montro kyanite deposit, 14 miles north of Buchanan, Grand Bassa County, Liberia, is near the middle of a belt of kyanite-bearing gneisses and schists that is 9 miles long and 1 mile wide. The deposit, which seems to be the most persistent and the largest single body of kyanite rocks in the belt, is approximately 12, 600 feet long, as much as 480 feet in outcrop width, and from 25 to 350 feet thick. Kyanite-quartz-biotite-feldspar-garnet-muscovite gneiss, local interbeds of kyanite-mica schist, and lesser amounts of biotite-quartz gneiss, are the principal rocks in the deposit. Other rocks in the kyanite belt include garnet-biotite gneiss, undifferentiated quartzo-feldspathic gneiss, quartzite, and amphibolite. The rocks are the product of regional metamorphism to almandine amphibolite facies. The regional strike is northwest and dips are southwest. Kyanite crystals are as much as 3 inches long. The kyanite content ranges from 5. 8 to 46. 7 percent, but most rocks contain between 10 and 35 percent. Garnetiferous beds contain as much as 15 percent red garnets that range to half an inch in diameter. In general, the garnet-rich beds are found in the upper part of the deposit. he total reserves of the Mt. Montro kyanite deposit are estimated at about 10 million tons of kyanitic rock containing approximately 2.5 million tons of kyanite. These estimates include measured, indicated, and inferred reserves, calculated to depths of 25 to 100 feet, on the assumption that open-cut mining to those depths would be feasible. The largest part of the deposit underlies Mt. Montro and contains about 8 million tons of kyanitic rock containing nearly 1.9 million tons of kyanite. Residual soil overlying the deposit averages about 5 feet in thickness and is estimated to comprise slightly more than 400,000 cubic yards of material containing about 186,000 tons of kyanite. The proximity of the kyanite deposit to a paved highway, to port facilities at Buchanan, and to water, electrical power, and timber resources are considered favorable factors relevant to possible development.

Grand Bassa County↗