The genetic classification of the bed rock hypogene mineral deposits

Schmitt, Harrison Ashley

doi:10.2113/gsecongeo.45.7.671

Cited by 4 publications

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“…Our use of the term semisyngenetic (H. A. Schmitt, 1948, has coined the term syngenoid for this type) implies that the sulfides, originally epigenetic and hydrothermal in origin, or accessory minerals in igneous rocks, were leached and carried as salts by surface and ground waters and to a lesser degree as fine metalliferous detritus from sites of original emplacement into basins of accumulating sediments. The metal salts may in part have been sulfidized by 1-12S, possibly generated from decaying vegetable matter, and trapped in porous unconsolidated arkoses and shaly arkoses in the basin.…”

Section: Discussionmentioning

confidence: 99%

Geology and ore deposits of the Sacramento (High Rolls) mining district, Otero County, New Mexico

Jerome¹,

Campbell²,

Wright³

et al. 1965

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In the Sacramento (High Rolls) mining district, Otero County, New Mexico, the Permian Abo Formation unconformably overlies folded and faulted rocks of pre-Permian age; in turn, it is overlain conformably(?) by the Permian Yeso Formation. Structure in the Abo and Yeso is relatively simple, being generally a monocline striking north and dipping gently east and cut by faults of moderate throw. The few intrusives in the district are sills of andesite with no associated mineralization or alteration.The Abo contains small, irregular deposits of copper and lead minerals occurring separately or associated in discontinuous, light-colored arkose beds sandwiched between red shales. Total production from these deposits through 1962 probably does not exceed 23,000 tons of lead ore varying between 5 and 11 per cent lead and 6500 tons of copper ore varying between 2 and 7 per cent copper. Minor amounts of other metals occur with these principal ore types.Evidence accumulated as a result of surface and underground mapping, a large number of assays, and extensive testing of favorable-appearing arkose beds with acetic acid and potassium iodide for lead sulfate and lead carbonate strongly suggests that the ores are "semisyngenetic" in origin. Copper and lead sulfides possibly were deposited with the arkose. The source of the metals has not been established. Both copper and lead sulfides later were oxidized and the metals reconcentrated to some extent as carbonates and sulfates by the action of ground water.Provided such an origin is correct, the overlying Yeso Formation and the underlying rock units, predominantly the Magdalena Group, contain no ore deposits that are genetically related to those in the Abo.

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Section: Discussionmentioning

confidence: 99%

Geology and ore deposits of the Sacramento (High Rolls) mining district, Otero County, New Mexico

Jerome¹,

Campbell²,

Wright³

et al. 1965

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“…Bundy concluded from the presence of dickite that the temperature of the ore-forming fluid must have been higher than the epithermal range established by Lindgren (1933). Following Schmitt (1950), Bundy classified the deposits as Tertiary siliceous, epithermal, shallow, or volcanic.…”

Section: Sandoval County Cochiti (Bland) Districtmentioning

confidence: 99%

Summary of the mineral resources of Bernalillo, Sandoval, and Santa Fe Counties, New Mexico

Elston¹

1968

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The oldest mines in the United States are in north-central New Mexico. Turquoise was mined before 900 A.D., lead and silver before 1600, and gold after 1828. Mining for base metals and coal began in 1880 but is now negligible. Since 1945, industrial nonmetals have been produced near Albuquerque.The Cerrillos (turquoise, lead, zinc, silver, copper), Old Placer (gold, tungsten), and New Placer (gold, copper, lead, zinc, silver, tungsten) districts are in a belt of early Tertiary monzonite stocks and laccoliths. Production from placers, breccia pipes, pyrometasomatic deposits, limestone replacement pipes, and veins has totaled about $11 million. "Red beds" copper deposits (Nacimiento district) and epithermal gold-silver veins (Cochiti district) have each yielded more than $1 million.Quaternary sediments of the Rio Grande provide sand and gravel. Brick and tile are made from Pennsylvanian and Cretaceous shales and building blocks of pumice and scoria from Quaternary volcanoes. A cement plant and two gypsum products plants, opened in 1959 and 1960, use limestone, dolomite, and shale from the Madera Formation (Pennsylvanian), gypsum from the Todilto Formation (Jurassic), and natural gas from the San Juan Basin. Annual production of nonmetals ranges from $9 to $13 million. Deposits of silica sand, bentonite, fluorspar, barite, marble, sulfur, perlite, and ocher are known but not currently (1966) worked.Near Cerrillos, 7 million tons of coking bituminous coal and anthracite have been mined; thermal metamorphism accounts for the rank. Elsewhere, bituminous coal occurs in folded and faulted coal beds of intermontane basins and subbituminous coal in flat-lying beds of the Colorado Plateau. The coals are Upper Cretaceous (Mesaverde and Fruitland formations). Reserves are estimated at 5 billion tons, including 53 million tons near Cerrillos. Although oil and gas production of the three-county area is not large, proximity to the San Juan gas field is a favorable economic factor.

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Chapter 2 Phases of Diagenesis and Authigenesis

Fairbridge¹

1967

Developments in Sedimentology

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The genetic classification of the bed rock hypogene mineral deposits

Cited by 4 publications

References 0 publications

Geology and ore deposits of the Sacramento (High Rolls) mining district, Otero County, New Mexico

Geology and ore deposits of the Sacramento (High Rolls) mining district, Otero County, New Mexico

Summary of the mineral resources of Bernalillo, Sandoval, and Santa Fe Counties, New Mexico

Chapter 2 Phases of Diagenesis and Authigenesis

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