V. J. Grauch
V. J. S. ("Tien") Grauch has been employed by the U.S. Geological Survey in Denver, Colorado since 1977, where she is currently a Scientist Emeritus (senior research geophysicist) with the Geology, Geophysics, and Geochemistry Science Center.
Her research interests include application of high-resolution aeromagnetic data to map intrasedimentary faults, integration of geologic and geophysical data to develop 3D geologic and hydrogeologic frameworks, the relation between magnetic sources and geology, interpretation of aeromagnetic data over rugged magnetic terrain, and development of new interpretation methods.
Education and Certifications
PhD (1986) in geophysics from Colorado School of Mines
BA (1975) in geology from Carleton College
Science and Products
Filter Total Items: 99
Geophysical expression of buried range-front embayment structure: Great Sand Dunes National Park, Rio Grande rift, Colorado Geophysical expression of buried range-front embayment structure: Great Sand Dunes National Park, Rio Grande rift, Colorado
Great Sand Dunes National Park and Preserve (GRSA, Colorado) lies along the eastern margin of the San Luis Basin and the tectonically active Sangre de Cristo fault system that are part of the northern Rio Grande rift. GRSA lies within a prominent embayment in the range front where two separate sections of the Sangre de Cristo fault system intersect. Fault scarps are observed along both
Authors
Benjamin J. Drenth, V. J. Grauch, Chester A. Ruleman, Judith A Schenk
Geologic map and cross sections of the Embudo Fault Zone in the Southern Taos Valley, Taos County, New Mexico Geologic map and cross sections of the Embudo Fault Zone in the Southern Taos Valley, Taos County, New Mexico
The southern Taos Valley encompasses the physiographic and geologic transition zone between the Picuris Mountains and the San Luis Basin of the Rio Grande rift. The Embudo fault zone is the rift transfer structure that has accommodated the kinematic disparities between the San Luis Basin and the Española Basin during Neogene rift extension. The eastern terminus of the transfer zone...
Authors
Paul W. Bauer, Keith I. Kelson, V. J. S. Grauch, Benjamin J. Drenth, Peggy S. Johnson, Scott B. Aby, Brigitte Felix
A comprehensive survey of faults, breccias, and fractures in and flanking the eastern Española Basin, Rio Grande rift, New Mexico A comprehensive survey of faults, breccias, and fractures in and flanking the eastern Española Basin, Rio Grande rift, New Mexico
A comprehensive survey of geologic structures formed in the Earth’s brittle regime in the eastern Española Basin and flank of the Rio Grande rift, New Mexico, reveals a complex and protracted record of multiple tectonic events. Data and analyses from this representative rift flank-basin pair include measurements from 53 individual fault zones and 22 other brittle structures, such as...
Authors
Jonathan S. Caine, Scott A. Minor, V. J. S. Grauch, James R. Budahn, Tucker T. Keren
Latest Miocene-earliest Pliocene evolution of the ancestral Rio Grande at the Española-San Luis Basin boundary, northern New Mexico Latest Miocene-earliest Pliocene evolution of the ancestral Rio Grande at the Española-San Luis Basin boundary, northern New Mexico
We use stratigraphic relations, paleoflow data, and 40Ar/39Ar dating to interpret net aggradation, punctuated by at least two minor incisional events, along part of the upper ancestral Rio Grande fluvial system between 5.5 and 4.5 Ma (in northern New Mexico). The studied fluvial deposits, which we informally call the Sandlin unit of the Santa Fe Group, overlie a structural high between...
Authors
Daniel J. Koning, Scott B. Aby, V. J. Grauch, Matthew J. Zimmerer
Geologic cross sections and preliminary geologic map of the Questa Area, Taos County, New Mexico Geologic cross sections and preliminary geologic map of the Questa Area, Taos County, New Mexico
In 2011, the senior authors were contacted by Ron Gardiner of Questa, and Village of Questa Mayor Esther Garcia, to discuss the existing and future groundwater supply for the Village of Questa. This meeting led to the development of a plan in 2013 to perform an integrated geologic, geophysical, and hydrogeologic investigation of the Questa area by the New Mexico Bureau of Geology &...
Authors
Paul W. Bauer, V. J. S. Grauch, Peggy S. Johnson, Ren A. Thompson, Benjamin J. Drenth, Keith I. Kelson
Preliminary geophysical interpretations of regional subsurface geology near the Questa Mine Tailing Facility and Guadalupe Mountain, Taos County, New Mexico Preliminary geophysical interpretations of regional subsurface geology near the Questa Mine Tailing Facility and Guadalupe Mountain, Taos County, New Mexico
This report presents geophysical interpretations of regional subsurface geology in the vicinity of the Tailing Facility of the Questa Mine near Guadalupe Mountain, Taos County, New Mexico, in cooperation with the New Mexico Environment Department. The interpretations were developed from aeromagnetic data, regional gravity data, data from four ground magnetic traverses, geologic mapping...
Authors
V. J. S. Grauch, Benjamin J. Drenth, Ren A. Thompson, Paul W. Bauer
Science and Products
Filter Total Items: 99
Geophysical expression of buried range-front embayment structure: Great Sand Dunes National Park, Rio Grande rift, Colorado Geophysical expression of buried range-front embayment structure: Great Sand Dunes National Park, Rio Grande rift, Colorado
Great Sand Dunes National Park and Preserve (GRSA, Colorado) lies along the eastern margin of the San Luis Basin and the tectonically active Sangre de Cristo fault system that are part of the northern Rio Grande rift. GRSA lies within a prominent embayment in the range front where two separate sections of the Sangre de Cristo fault system intersect. Fault scarps are observed along both
Authors
Benjamin J. Drenth, V. J. Grauch, Chester A. Ruleman, Judith A Schenk
Geologic map and cross sections of the Embudo Fault Zone in the Southern Taos Valley, Taos County, New Mexico Geologic map and cross sections of the Embudo Fault Zone in the Southern Taos Valley, Taos County, New Mexico
The southern Taos Valley encompasses the physiographic and geologic transition zone between the Picuris Mountains and the San Luis Basin of the Rio Grande rift. The Embudo fault zone is the rift transfer structure that has accommodated the kinematic disparities between the San Luis Basin and the Española Basin during Neogene rift extension. The eastern terminus of the transfer zone...
Authors
Paul W. Bauer, Keith I. Kelson, V. J. S. Grauch, Benjamin J. Drenth, Peggy S. Johnson, Scott B. Aby, Brigitte Felix
A comprehensive survey of faults, breccias, and fractures in and flanking the eastern Española Basin, Rio Grande rift, New Mexico A comprehensive survey of faults, breccias, and fractures in and flanking the eastern Española Basin, Rio Grande rift, New Mexico
A comprehensive survey of geologic structures formed in the Earth’s brittle regime in the eastern Española Basin and flank of the Rio Grande rift, New Mexico, reveals a complex and protracted record of multiple tectonic events. Data and analyses from this representative rift flank-basin pair include measurements from 53 individual fault zones and 22 other brittle structures, such as...
Authors
Jonathan S. Caine, Scott A. Minor, V. J. S. Grauch, James R. Budahn, Tucker T. Keren
Latest Miocene-earliest Pliocene evolution of the ancestral Rio Grande at the Española-San Luis Basin boundary, northern New Mexico Latest Miocene-earliest Pliocene evolution of the ancestral Rio Grande at the Española-San Luis Basin boundary, northern New Mexico
We use stratigraphic relations, paleoflow data, and 40Ar/39Ar dating to interpret net aggradation, punctuated by at least two minor incisional events, along part of the upper ancestral Rio Grande fluvial system between 5.5 and 4.5 Ma (in northern New Mexico). The studied fluvial deposits, which we informally call the Sandlin unit of the Santa Fe Group, overlie a structural high between...
Authors
Daniel J. Koning, Scott B. Aby, V. J. Grauch, Matthew J. Zimmerer
Geologic cross sections and preliminary geologic map of the Questa Area, Taos County, New Mexico Geologic cross sections and preliminary geologic map of the Questa Area, Taos County, New Mexico
In 2011, the senior authors were contacted by Ron Gardiner of Questa, and Village of Questa Mayor Esther Garcia, to discuss the existing and future groundwater supply for the Village of Questa. This meeting led to the development of a plan in 2013 to perform an integrated geologic, geophysical, and hydrogeologic investigation of the Questa area by the New Mexico Bureau of Geology &...
Authors
Paul W. Bauer, V. J. S. Grauch, Peggy S. Johnson, Ren A. Thompson, Benjamin J. Drenth, Keith I. Kelson
Preliminary geophysical interpretations of regional subsurface geology near the Questa Mine Tailing Facility and Guadalupe Mountain, Taos County, New Mexico Preliminary geophysical interpretations of regional subsurface geology near the Questa Mine Tailing Facility and Guadalupe Mountain, Taos County, New Mexico
This report presents geophysical interpretations of regional subsurface geology in the vicinity of the Tailing Facility of the Questa Mine near Guadalupe Mountain, Taos County, New Mexico, in cooperation with the New Mexico Environment Department. The interpretations were developed from aeromagnetic data, regional gravity data, data from four ground magnetic traverses, geologic mapping...
Authors
V. J. S. Grauch, Benjamin J. Drenth, Ren A. Thompson, Paul W. Bauer