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A predictive exploration model for MVT Pb-Zn mineralization in Central Texas : insights from the Southeast Missouri Lead District
(2017-06-23)
Minor Pb-Zn occurrences on the flanks of the Llano Uplift in Central Texas have many geologic similarities to the world-class Mississippi Valley Type (MVT) deposits of Southeast Missouri. In both areas, metallic sulfides ...
Geochemical and geochronological relationships between granitoid plutons of the Biga Peninsula, NW Turkey
(2012-05)
The Aegean Sea is considered to be a classic back-arc basin. Back-arc basins may develop by active processes including retreat of the overriding plate or upwelling from the subducting slab. Alternatively, back-arc basins ...
Cranial osteology of the long-beaked echidna, and the definition, diagnosis, and origin of Monotremata and its major subclades
(2013-12)
Extant monotremes have a combination of plesiomorphic and apomorphic characters that causes ambiguity about their basic anatomy and evolutionary history. The problem is compounded by the lack of extinct and extant specimens ...
Mesoproterozoic tectonothermal development of southwestern Sweden : new age constraints using field relationships and U-Pb geochronology
(1997)
The Atran terrane of southwestern Sweden is a Mesoproterozoic, polydeformed terrane and a product of crustal growth westward away from an Archean core. Both Gothian (Labradorian) and Sveconorwegian (Grenvillian) deformations ...
Multicomponent seismic image matching and comparison - Fasken Ranch, Andrews County, Texas
(2015-05)
P-wave and S-wave multicomponent seismic data respond to lithology and fluid variations differently, providing interpreters with tools that supply additional information about subsurface geology. To interpret multicomponent ...
AVA analysis and modeling of multi-component seismic wave modes (P-P, P-SV and SV-P): Wolfberry Play Midland Basin, Texas
(2015-12)
In this study, amplitude variation with angle (AVA) of different seismic wave modes, P-P, P-SV and SV-P, will be evaluated. AVA analysis can provide important information about reservoir rocks such as lithology, porosity, ...
Geochemical evolution of ground water in the Barton Springs segment of the Edwards Aquifer
(2005)
The water quality in a karst (limestone) aquifer changes over time, making the application of traditional hydrogeologic principles difficult or impossible. This research's goal was to advance the understanding of the ...
3D textural and geochemical analyses on carbonado diamond : insights from pores and the minerals within them
(2018-05-04)
Carbonado is an enigmatic variety of polycrystalline diamond found only in placer deposits in Brazil and the Central African Republic, with unknown primary origin. These highly porous dark nodules possess a narrow range ...
Temporal constraints on progressive rifting of a hyper-extended continental margin using bedrock and detrital zircon (U-Th)/(Pb-He) dating, Mauléon Basin, western Pyrenees
(2015-05)
While the understanding of the structural, temporal, and thermal evolution of rifted continental margins has significantly evolved over the past several decades, critical outstanding questions remain, especially concerning ...
Architecture of deposits formed in a tectonically generated tidal strait, upper Baronia Fm., Ager Basin, South Central Pyrenees, Spain
(2011-05)
The upper Baronia Fm. of the Ager Basin, Spain, is composed of a hierarchy of prominently stacked sets of primarily unidirectional cross-strata in units up to 40m thick. These large sets of cross-strata are interpreted ...