... of magma generation. Our detailed zircon and whole-rock data support the following three interpretations: (1) The Roosevelt Granite in the southern Sawatch Range was the oldest rock dated at 1,766 ± 7 Ma, and it intruded various metavolcanic and metasedimentary rocks. Geochemistry of both whole-rock...

... relationships among the principal rock types present. The principal revisions involve the gabbroic, anorthositic, and intermediate rocks among which the Raggedy Mountain Gabbro Group has been partially redefined and subdivided into two formations, the Glen Mountains Layered Complex and the younger Roosevelt...

...S. H. Ward; W. T. Parry; W. P. Nash; W. R. Sill; K. L. Cook; R. B. Smith; D. S. Chapman; F. H. Brown; J. A. Whelan; J. R. Bowman Abstract The Roosevelt Hot Springs thermal area is a newly discovered geothermal power prospect in Utah. Seven production wells have been drilled with a maximum per well...

... tectonic belt (OTB), the Swisher–(ST) Debaca (DT) terrane, the southern Granite-Rhyolite province (SGRP), the Grenville province (GP), and the Carrizo group (CG). The locations of the mafic bodies associated with the Central Basin platform (CBP), the west platform fault (WPF), the Roosevelt uplift (RU...

... horst block results from its underlying gabbroic substrate (Raggedy Mountain gabbro group) rather than the covering, thin Wichita granites, or Carlton rhyolite. (b) Intrusion of the Roosevelt gabbros as small plutons into the Glen Mountains layered complex marks the beginning of the Wichita Mountains...

.../F = 0.52 and compare favorably with their unaltered ancient counterparts. Arkosic alluvium at Roosevelt Hot Springs, Utah is believed to represent a modern analog for alteration of the Auvergne sandstones. The alluvium has been altered and cemented with silica by geothermal waters at near-surface...

...Gary L. Sandlin; Frank L. Schatz ABSTRACT The Peterson and South Peterson fields, located on the northside of the generally east-west-trending Matador arch in southern Roosevelt County, New Mexico, are on relatively small structural features separated by dry holes. Both fields produce from...

...W. T. Huang; C. A. Merritt Abstract The Wichita Mountains of Southwest Oklahoma are made up of pre-Cambrian igneous rocks, mostly gabbros, anorthosite and granites, which probably form sheet-like intrusions. Troctolites occurring in the oldest intrusion crop out near Roosevelt and other locations...

... and the overlying A-type rhyolites records tilting of the complex followed by a period of erosion. Wichita granite sills compositionally similar to the rhyolites intruded along this surface ( Fig. 2 ). Biotite-bearing Roosevelt Gabbro plutons also intrude the GMLC but are petrogenetically unrelated to the layered...

... for heat transfer ( Shook, 1998 ; Rose et al., 2004 ; Owens et al. 2018 ). The main point is that optimal conditions for EGS-type heat exchange appear to have formed naturally in a granitic reservoir where fluid movement is restricted to well-connected fractures, making Roosevelt Hot Springs relevant...

...Howard P. Ross; Dennis L. Nielson; Joseph N. Moore ABSTRACT The Roosevelt Hot Springs geothermal system has been undergoing intensive exploration since 1974 and has been used as a natural laboratory for the development and testing of geothermal exploration methods by research organizations...

...S. Lindsay Poluga; Abdul Shakoor; Eric L. Bilderback Abstract The purpose of this study was to characterize the rock mass at Mount Rushmore National Memorial (MORU) and to evaluate the stability of the presidential sculptures. The sculptures are carved in granite, but quartz-mica schist and minor...

... magnitude ( M L ) 1.2, providing a new starting point for improved tectonic analyses of the region. In this study, we focus on a unique event cluster discovered by Lockridge et al. (2012) , centered approximately 7 km northeast of Theodore Roosevelt Dam (Roosevelt Dam) and in central Arizona. We...

... Lea 28-16S-38E Green & Michael 1-Burson 8,960 Leonard 8,308 Drinkard 203 BO 39 Garret Drinkard SPT Significant oil discovery in the San Simon Channel area 16 Roosevelt 19-5S-33E Amoco 1-Peterson 7,936 Pennsylvanian 7,766 Cisco 7,210 M .735 Unnamed NFW Significant Cisco gas...