
Austin BolesShell Oil USA
Austin Boles
PhD
About
18
Publications
3,587
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
285
Citations
Introduction
Additional affiliations
August 2012 - March 2017
Publications
Publications (18)
Isotopic and geochronologic investigation of authigenic, K‐bearing clays in the Appalachian Plateau of the northeastern U.S. Midcontinent yields new insights about the tectonic and diagenetic history of the North American sedimentary cover sequence. In situ texture analysis by High Resolution X‐ray Texture Goniometry indicates preservation of beddi...
The active Mai’iu low-angle normal fault in the Woodlark rift dips as low as 16°–20° at the surface and has formed by extensional inversion of the Paleogene Owen-Stanley thrust fault. The Mai’iu fault has slipped at centimeter-per-year rates for at least 3.3 m.y., in the process exhuming a >29 km width of a largely uneroded fault surface, and uplif...
Illite polytypes are used to elucidate the geological record of formations, such as the timing and provenance of deformations in geological structures and fluids, so the ability to characterize and identify them quantitatively is key. The purpose of the present study was to compare three X-ray powder diffraction (Q-XRPD) methods for illite polytype...
Exhumed fault rock of the central Alpine Fault Zone (South Island, New Zealand) shows extensive clay mineralization, and it has been the focus of recent research that aims to describe the evolution and frictional behavior of the fault. Using Quantitative X-ray powder diffraction, ⁴⁰Ar/³⁹Ar geochronology, hydrogen isotope (δD) geochemistry, and elec...
The Mai’iu fault has a Holocene slip rate of 11.7 ±3.5 mm/y and is one of the clearest examples of an active low-angle normal fault on Earth. Along most of its trace it dips ~20° N. Slip has exhumed a little-eroded, abandoned fault surface >29 km wide, which crests southward over >3 km-high mountains to define the Suckling-Dayman dome. North of the...
During the second phase of the Alpine Fault, Deep Fault Drilling Project (DFDP) in the Whataroa River, South Westland, New Zealand, bedrock was encountered in the DFDP-2B borehole from 238.5–893.2 m Measured Depth (MD). Continuous sampling and meso- to microscale characterisation of whole rock cuttings established that, in sequence, the borehole sa...
Temperature and fluid pressure conditions control rock deformation and mineralization on geological faults, and hence the distribution of earthquakes. Typical intraplate continental crust has hydrostatic fluid pressure and a near-surface thermal gradient of 31 ± 15 degrees Celsius per kilometre. At temperatures above 300-450 degrees Celsius, usuall...
Fluids in the upper crust affect strength properties, rock composition and mineralization, but the sources, timing and pathways of geofluids are still not well constrained. Stable isotopic studies of clay-rich rocks, particularly newly formed illitic clays, shed new light on the role of geofluids during faulting and folding. Hydrogen isotopic (δD)...
The sensitivity of smectite during brief and protracted heating intervals can provide crucial information about the temperature history of faults during seismogenic slip and creep. Pelagic-sourced smectite is the most abundant clay mineral that is incorporated into the slip zone that was drilled during the Japan Trench Fast Drilling Project (JFAST)...
We present a new approach to identifying the source and age of paleofluids associated with low-temperature deformation in the brittle crust, using hydrogen isotopic compositions (δD) and 40Ar/39Ar geochronology of authigenic illite in clay gouge-bearing fault zones. The procedure involves grain size separation, polytype modeling, and isotopic analy...
Field sampling of multiple surface locations along the trace of the North Anatolian Fault Zone (Turkey) has yielded clay-rich fault gouge. Clay gouge has been proposed as an explanation for weak fault behavior on the San Andreas Fault and has the potential to date the timing of fault-related neomineralization as well as identify the source of miner...