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Publications

Results from our Program’s research and minerals information activities are published in USGS publications series as well as in outside journals.  To follow Minerals Information Periodicals, subscribe to the Mineral Periodicals RSS feed.

Filter Total Items: 2294

Chapter G: Tentative Correlation Between CIPW Normin pl (Total Plagioclase) and Los Angeles Wear in Precambrian Midcontinental Granites-Examples from Missouri and Oklahoma, with Applications and Limitations for Use

The normative chemical classification of Cross, Iddings, Pirsson, and Washington (CIPW) is commonly used in igneous petrology to distinguish igneous rocks by comparing their magmatic chemistries for similar and dissimilar components. A potential use for this classification other than in petrologic studies is in the rapid assessment of aggregate sources, possibly leading to an economic advantage fo
Authors
George H. Davis

A new species of Dyoros (Brachiopoda; Chonetoidea) from Nevada (United States) and stratigraphic implications for the Pennsylvanian and Permian Antler Overlap assemblage [Une nouvelle espèce de Dyoros (Brachiopoda; Chonetoidea) du Nevada (États-Unis) et i

Newly discovered fossil localities in coarse-grained deposits of the Pennsylvanian and Permian Antler overlap assemblage in the southern Shoshone Range, north-central Nevada have yielded a low-diversity assemblage consisting chiefly of a new species of chonetoidean brachiopod: Dyoros (Lissosia) nevadaensis nov. sp. The subgenus Dyoros (Lissosia), is known from Leonardian and lower Guadalupian stra
Authors
Patrick R. Racheboeuf, Thomas E. Moore, Robert B. Blodgett

Mono Lake excursion recorded in sediment of the Santa Clara Valley, California

Two intervals recording anomalous paleomagnetic inclinations were encountered in the top 40 meters of research drill hole CCOC in the Santa Clara Valley, California. The younger of these two intervals has an age of 28,090 ± 330 radiocarbon years B.P. (calibrated age ∼32.8 ka). This age is in excellent agreement with the latest estimate for the Mono Lake excursion at the type locality and confirms
Authors
Edward A. Mankinen, Carl M. Wentworth

Chapter 8 Petrogenesis and mineralogic residence of selected elements in the meade peak phosphatic shale member of the permian phosphoria formation, Southeast Idaho

The Meade Peak Phosphatic Shale Member of the Permian Phosphoria Formation hosts the ore mined by the phosphate industry of southeast Idaho. It also hosts environmentally sensitive elements (ESE) such as Se, As, Hg, Ni, Cd, Zn, and Cr. Primary chemistry, elemental distribution patterns, and mineralogy within the Meade Peak were modified by element migration and possibly the introduction of element
Authors
Richard I. Grauch, George A. Desborough, Gregory P. Meeker, A. L. Foster, Russell G. Tysdal, J. R. Herring, Heather A. Lowers, B. A. Ball, Robert A. Zielinski, E. A. Johnson

Paleomagnetism and 40Ar/39Ar ages from volcanics extruded during the Matuyama and Brunhes Chrons near McMurdo Sound, Antarctica

Maps of virtual geomagnetic poles derived from international geomagnetic reference field models show large lobes with significant departures from the spin axis. These lobes persist in field models for the last few millenia. The anomalous lobes are associated with observation sites at extreme southerly latitudes. To determine whether these features persist for millions of years, paleomagnetic vecto
Authors
L. Tauxe, Philip B. Gans, Edward A. Mankinen

Ophiolite and volcanic arc assemblages on the Vizcaino Peninsula and Cedros Island region, Baja California Sur, Mexico: Mesozoic forearc lithosphere of the Cordilleran magmatic arc

Mesozoic ophiolites in the Vizcaíno Peninsula and Cedros Island region of Baja California Sur are suprasubduction zone Cordilleran-type ophiolites structurally juxtaposed with underlying high pressure-temperature subduction complex assemblages. The region is divided into three separate tectonostratigraphic terranes, but here we recognize stratigraphic, intrusive, and petrologie links between these
Authors
D.L. Kimbrough, Thomas E. Moore

Location and age database for selected foraminifer samples collected by Exxon Petroleum geologists in California

Most of the geologic maps published for central California before 1960 were made without the benefit of age determinations from microfossils. The ages of Cretaceous and Tertiary rocks in the mostly poorly exposed and structurally complex sedimentary rocks represented in the Coast Ranges are critical in determining stratigraphic succession or lack of it, and in determining whether the juxtaposition
Authors
Earl E. Brabb, John M. Parker

Publications of the Western Earth Surface Processes Team 2002

The Western Earth Surface Processes Team (WESPT) of the U.S. Geological Survey (USGS) conducts geologic mapping and related topical earth science studies in the western United States. This work is focused on areas where modern geologic maps and associated earth-science data are needed to address key societal and environmental issues such as ground-water quality, landslides and other potential geol
Authors
Charles Powell, R. W. Graymer

Shaded relief aeromagnetic map of the Santa Clara Valley and vicinity, California

This aeromagnetic map covers the southern portion of San Francisco Bay, the Santa Clara Valley and surrounding mountains, part of which has been modelled in threedimensions (Jachens and other, 2001). The magnetic anomaly map has been compiled from existing digital data. Data was obtained from six aeromagnetic surveys that were flown at different times, spacings and elevations. The International Ge
Authors
Carter W. Roberts, Robert C. Jachens

Significant Metalliferous and Selected Non-Metalliferous Lode Deposits, and Selected Placer Districts of Northeast Asia

Introduction This report contains a digtial database on lode deposits and placer districts of Northeast Asia. This region includes Eastern Siberia, Russian Far East, Mongolia, Northeast China, South Korea, and Japan. In folders on this site are a detailed database, a bibliography of cited references, descriptions of mineral deposit models, and a mineral deposit location map. Data are provided f
Authors
Sodov Ariunbileg, Gennandiy V. Biryul'kin, Jamba Byamba, Yury V. Davydov, Gunchin Dejidmaa, Elimir G. Distanov, Dangindorjiin Dorjgotov, Gennadiy N. Gamyanin, Ochir Gerel, Valeriy Y. Fridovskiy, Ayurzana Gotovsuren, Duk-Hwan Hwang, Anatoliy P. Kochnev, Alexei V. Kostin, Mikhail I. Kuzmin, Sergey A. Letunov, Li Jiliang, Li Xujun, Galina D. Malceva, V.D. Melnikov, Valeriy Nikitin, Alexander A. Obolenskiy, Masatsugu Ogasawara, Demberel Orolmaa, Leonid M. Parfenov, Nikolay V. Popov, Andrei V. Prokopiev, Vladimir Ratkin, Sergey M. Rodionov, Zhan V. Seminskiy, Vladimir I. Shpikerman, Alexander P. Smelov, Vitaly I. Sotnikov, Alexander V. Spiridonov, Valeriy V. Stogniy, Sadahisa Sudo, Sun Fengyue, Sun Jiapeng, Sun Weizhi, Valeriy M. Supletsov, Vladimir F. Timofeev, Oleg A. Tyan, Valeriy G. Vetluzhskikh, Xi Aihua, Yakov V. Yakovlev, Yan Hongquan, Vladimir I. Zhizhin, Nikolay N. Zinchuk, Lydia M. Zorina

Preliminary geologic map of the Elsinore 7.5' quadrangle, Riverside County, California

Open-File Report 03-281 contains a digital geologic map database of the Elsinore 7.5’ quadrangle, Riverside County, California that includes: 1. ARC/INFO (Environmental Systems Research Institute, http://www.esri.com) version 7.2.1 coverages of the various elements of the geologic map. 2. A Postscript file to plot the geologic map on a topographic base, and containing a Correlation of Map Units
Authors
Douglas M. Morton, F. Harold Weber, Rachel M. Alvarez, Diane Burns