Anne E McCafferty
Science and Products
Continental Scale Geophysics — Integrated Approaches to Delineate Prospective Environments for Critical Metals
Regional geophysical data that are available over continental scales such as magnetic, gravity, and magnetotelluric data can provide a foundation towards identifying and understanding the footprints and deep plumbing systems underlying these important ore systems. Our project will use continental-scale geophysical data to map the locations of deep crustal and mantle structures that may act as...
Crustal architecture beneath the southern Midcontinent (USA) and controls on Mesoproterozoic iron-oxide mineralization from 3D geophysical models
Several types of critical mineral-bearing ore deposits in the southern Midcontinent region of the U.S. are hosted in Mesoproterozoic igneous rocks largely concealed beneath Paleozoic cover. Discerning the architecture of igneous intrusions and volcanic centers in the crust is fundamental to understanding the geologic evolution of this vast region...
McCafferty, Anne E.; Phillips, Jeffrey D.; Hofstra, Albert H.; Day, Warren C. Geochemistry, Nd-Pb Isotopes, and Pb-Pb Ages of the Mesoproterozoic Pea Ridge Iron Oxide-Apatite–Rare Earth Element Deposit, Southeast Missouri
Iron oxide-apatite and iron oxide-copper-gold deposits occur within ~1.48 to 1.47 Ga volcanic rocks of the St. Francois Mountains terrane near a regional boundary separating crustal blocks having contrasting depleted-mantle Sm-Nd model ages (TDM). Major and trace element analyses and Nd and Pb isotope data were obtained to characterize the Pea...
Ayuso, Robert A.; Slack, John F.; Day, Warren C.; McCafferty, Anne E. Magnetic and gravity gradiometry framework for Mesoproterozoic iron oxide-apatite and iron oxide-copper-gold deposits, southeast Missouri, USA
High-resolution airborne magnetic and gravity gradiometry data provide the geophysical framework for evaluating the exploration potential of hidden iron oxide deposits in Mesoproterozoic basement rocks of southeast Missouri. The data are used to calculate mineral prospectivity for iron oxide-apatite (IOA) ± rare earth element (REE) and iron oxide-...
McCafferty, Anne E.; Phillips, Jeffrey; Driscoll, Rhonda L.
Developing integrated methods to address complex resource and environmental issues
IntroductionThis circular provides an overview of selected activities that were conducted within the U.S. Geological Survey (USGS) Integrated Methods Development Project, an interdisciplinary project designed to develop new tools and conduct innovative research requiring integration of geologic, geophysical, geochemical, and remote-sensing...
Smith, Kathleen S.; Phillips, Jeffrey D.; McCafferty, Anne E.; Clark, Roger N. Geophysical interpretation of U, Th, and rare earth element mineralization of the Bokan Mountain peralkaline granite complex, Prince of Wales Island, southeast Alaska
A prospectivity map for rare earth element (REE) mineralization at the Bokan Mountain peralkaline granite complex, Prince of Wales Island, southeastern Alaska, was calculated from high-resolution airborne gamma-ray data. The map displays areas with similar radioelement concentrations as those over the Dotson REE-vein-dike system, which is...
McCafferty, Anne E.; Stoeser, Douglas B.; Van Gosen, Bradley S.
A deposit model for carbonatite and peralkaline intrusion-related rare earth element deposits: Chapter J in Mineral deposit models for resource assessment
Carbonatite and alkaline intrusive complexes, as well as their weathering products, are the primary sources of rare earth elements. A wide variety of other commodities have been exploited from carbonatites and alkaline igneous rocks including niobium, phosphate, titanium, vermiculite, barite, fluorite, copper, calcite, and zirconium. Other...
Verplanck, Philip L.; Van Gosen, Bradley S.; Seal, Robert R.; McCafferty, Anne E.
Geophysical delineation of Mg-rich ultramafic rocks for mineral carbon sequestration
This presentation covers three general topics: (1) description of a new geologic compilation of the United States that shows the location of magnesium-rich ultramafic rocks in the conterminous United States; (2) conceptual illustration of the potential ways that ultramafic rocks could be used to sequester carbon dioxide; and (3) description of...
McCafferty, Anne E.; Van Gosen, Bradley S.; Krevor, Sam C.; Graves, Chris R. Magnetic properties, acid neutralization capacity, and net acid production of rocks in the Animas River Watershed Silverton, Colorado
Federal land managers along with local stakeholders in the Upper Animas River watershed near Silverton, Colorado are actively designing and implementing mine waste remediation projects to mitigate the effects of acid mine drainage from several abandoned hard rock metal mines and mills. Local source rocks with high acid neutralization capacity (ANC...
McCafferty, Anne E.; Yager, Douglas B.; Horton, Radley M.; Diehl, Sharon F.
Net acid production, acid neutralizing capacity, and associated geophysical, mineralogical, and geochemical characteristics of Animas River watershed rocks near Silverton, Colorado
Yager, Douglas B.; McCafferty, Anne E.; Stanton, Mark R.; Diehl, Sharon F.; Driscoll, Rhonda L.; Fey, David L.; Sutley, Stephen J. Application of geophysical techniques to minerals-related environmental problems
Watson, Ken; Fitterman, David; Saltus, R.W.; McCafferty, Anne; Swayze, Gregg A.; Church, Stan; Smith, Kathy; Goldhaber, Marty; Robson, Stan; McMahan, Pete Geophysical signatures used to constrain geologic mapping; the search for VMS deposits in Southeast Alaska
Wynn, Jeff; Doucette, Jon P.; Karl, Susan M.; McCafferty, Anne E.; Smith, Bruce D.; Bittenbender, Peter Geochemical results of a hydrothermally altered area at Baker Creek, Blaine County, Idaho
The area immediately east of Baker Creek, Blaine County, Idaho, is underlain by a thick section of mafic to intermediate lava flows of the Eocene Challis Volcanic Group. Widespread propylitic alteration surrounds a zone of argillic alteration and an inner core of phyllic alteration. Silicified breccia is present along an east-trending fault...
Erdman, James A.; Moye, Falma J.; Theobald, Paul K.; McCafferty, Anne E.; Larsen, Richard K.
Geophysical Modeling of the Mid-Continent
Side-by-side comparisons of magnetic and density models across iron oxide deposits in the Mid-Continent region of the United States.
Mid-Continent Area
Map showing large part of the United States referred to as the southern mid-continent region.
Mapping the Subsurface of the St. Francois Mountain Terrane
Gravity, magnetic, and integrated analysis maps of the St. Francois Mountain terrane of the Mid-Continent of the United States.
Rich, Attractive, and Extremely Shallow
No, it’s not a title for a new reality-dating TV show, but it is real science! It also describes the ideal mineral deposit.
Low-Level Flights in Southeast Missouri Will Look at Geology and Mineral Resources
A high-resolution airborne survey to study the rocks within the St. Francois Mountains will be conducted by U.S. Geological Survey scientists starting this week.
Helicopter Survey to Map Potential Mineral Resources in Southeast Missouri
U.S. Geological Survey scientists will conduct a comprehensive, high-resolution airborne survey to study the rock layers under parts of Washington, Franklin and Crawford counties. Instruments on the helicopter will collect information about the underground geology and mineral deposits of the region.