The copper deposits of the Clifton-Morenci district, Arizona

Geology and geochemistry of the West Ore Body and associated skarns, Copper Canyon porphyry copper deposits, Lander County, Nevada, with a section on electron microprobe analyses of andradite and diopside

“…Systematic zoning of the garnetite with its surrounding rocks, the relatively coarse-to mediumgrained garnets themselves ( fig. 14), their occurrence In a high-temperature hydrothermal environment (Theodore and Blake, 1975), and their overall petrologic similarity to many other similar rocks in or near porphyry copper deposits that replace carbonate (Ransome, 1904;Lindgren, 1905;Knopf, 1918;Spencer, 1917;Gale, 1965;Moolick and Durek, 1966;Eastlick, 1968;James, 1971;Himes, 1972; and many others) all suggest to us these rocks grew in part at the expense of some carbonate. Certainly there is some textural evidence that garnet and pyroxene at Copper Canyon may have grown from a carbonate-rich host.…”

“…These observations are significant because they establish for these rocks overlapping paragenetic relations for tremolite, one of the typical minerals of a calc-silicate contact metasomatic assemblage, and hydrothermal biotite and potassium feldspar. Introduction of copper-bearing hydrothermal solutions into preexisting contact metamorphic aureoles has been reported in the literature (Lindgren, 1905;Creasey, …”

Stratigraphic nomenclature of Cambrian and Lower Ordovician rocks of easternmost southern Arizona and adjacent westernmost New Mexico

“…84, fig. 1) were divided by Lindgren (1905) into the Coronado Quartzite of Cambrian age and the Longfellow Limestone of assigned Ordovician age. With the permission of the Phelps Dodge Co., I examined the Coronado Quartzite in the Morenci pit area and, with the assistance of George C. Cone, remeasured the Longfellow Limestone 6 km (3% miles) east of Morenci along the San Francisco River.…”

“…A year later, Lindgren (1905) named the basal two formations of the Paleozoic in the Morenci area, near the east edge of Arizona (loc. 84, fig.…”

Mineral deposits of the Santa Rita and Patagonia Mountains, Arizona

“…Year. 190319041905190619071908190919101911191219031904190519061907190819091910191119121903190419051906190719081909191019111912 Ore treated (tons Yearly production of gold, silver, copper, lead, and zinc in the mining districts of the Nogales quadrangles, 1903-1912 Continued. District.…”