Search Results - "KOONS, P. O"

A fault runs through it: Modeling the influence of rock strength and grain‐size distribution in a fault‐damaged landscape by Roy, S. G., Tucker, G. E., Koons, P. O., Smith, S. M., Upton, P.

“…We explore two ways in which the mechanical properties of rock potentially influence fluvial incision and sediment transport within a watershed: rock…”
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The influence of crustal strength fields on the patterns and rates of fluvial incision by Roy, S. G., Koons, P. O., Upton, P., Tucker, G. E.

“…Gradients in the bedrock strength field are increasingly recognized as integral to the rates and patterns of landscape evolution. To explore this influence, we…”
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Modeling the Topographic Evolution of Collisional Belts by Koons, P. O

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Controls on low-pressure anatexis by GERBI, C. C., JOHNSON, S. E., KOONS, P. O.

“…Low‐pressure anatexis, whereby rocks melt in place after passing through the andalusite stability field, develops under more restricted conditions than does…”
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Fluid evolution and thermal structure in the rapidly exhuming gneiss complex of Namche Barwa-Gyala Peri, eastern Himalayan syntaxis by CRAW, D., KOONS, P. O., ZEITLER, P. K., KIDD, W. S. F.

“…High‐grade gneisses (amphibolite–granulite facies) of the Namche Barwa and Gyala Peri massifs, in the eastern Himalayan syntaxis, have been unroofed from…”
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Three-dimensional mechanics of Yakutat convergence in the southern Alaskan plate corner by Koons, P. O., Hooks, B. P., Pavlis, T., Upton, P., Barker, A. D.

“…Three‐dimensional numerical models are used to investigate the mechanical evolution of the southern Alaskan plate corner where the Yakutat and the Pacific…”
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Multi-scale characterization of topographic anisotropy by Roy, S.G., Koons, P.O., Osti, B., Upton, P., Tucker, G.E.

“…We present the every-direction variogram analysis (EVA) method for quantifying orientation and scale dependence of topographic anisotropy to aid in…”
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Critical wedges in three dimensions: Analytical expressions from Mohr-Coulomb constrained perturbation analysis by Enlow, R. L., Koons, P. O.

“…We present simple analytical expressions for evaluating three‐dimensional stress fields in critical wedges (Coulomb failure throughout) that are deforming…”
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Arsenic distribution during formation and capping of an oxidised sulphidic minesoil, Macraes mine, New Zealand by Craw, D, Koons, P.O, Chappell, D.A

“…A minesoil has developed over 5 years oxidative exposure on sulphide concentrate tailings (ca. 1 wt.% As) at the Macraes mesothermal gold mine, New Zealand…”
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Gold dispersal and placer formation in an active oblique collisional mountain belt, Southern Alps, New Zealand by Craw, D, Youngson, John H, Koons, P. O

“…The Southern Alps of New Zealand constitute part of an orogenic belt forming on the western margin of the Pacific plate due to collision along the…”
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The effects of porphyroblast growth on the effective viscosity of metapelitic rocks: implications for the strength of the middle crust by GROOME, W.G., JOHNSON, S.E., KOONS, P.O.

“…Numerical models are used to examine the effects of porphyroblast growth on the rheology of compositionally layered rocks (metapelites and metapsammites) and…”
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Near-surface expression of a young mesothermal gold mineralizing system, Sealy Range, Southern Alps, New Zealand by Templeton, A. S., Craw, D., Koons, P. O., Chamberlain, C. P.

“…Carbonate-limonite veins formed in steeply dipping fractures in the upper few hundred metres of basement greywacke in the actively rising Southern Alps of New…”
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Relative geobarometry from high-pressure rocks of quartzofeldspathic composition from the Sesia Zone, Western Alps, Italy by KOONS, P. O

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Quaternary shelf structures SE of the South Island, imaged by high-resolution seismic profiling by Gorman, AR, Hill, MG, Orpin, AR, Koons, PO, Norris, RJ, Landis, CA, Allan, TMH, Johnstone, T, Gray, FL, Wilson, D, Osterberg, EC

“…Along the south-eastern coast of New Zealand's South Island, observations and characterisations of shelf geology are complicated by numerous possibly active…”
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Fluids in a backthrust regime (Southern Alps, New Zealand) by UPTON, P, CALDWELL, T. G, CHAMBERLAIN, C. P, CRAW, D, JAMES, Z, JIRACEK, G. J, KOONS, P. O, WANNAMAKER, P. E

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Tectonically driven fluid flow and gold mineralisation in active collisional orogenic belts: comparison between New Zealand and western Himalaya by Craw, D., Koons, P.O., Horton, T., Chamberlain, C.P.

“…Hydrothermal activity and mesothermal-styled gold mineralisation occurs near the main topographic divide of most active or young collisional mountain belts…”
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Structure and topographic evolution of the Main Divide in the Landsborough-Hopkins area of the Southern Alps, New Zealand by Craw, D., Nelson, E., Koons, P. O.

“…The Landsborough-Hopkins area of the Southern Alps lies between the tectonically active central Southern Alps and the south Southern Alps which were most…”
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Implications to garnet-clinopyroxene geothermometry of non-ideal solid solution in jadeitic pyroxenes by KOONS, P. O

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Stable isotopic evidence for mixing between metamorphic fluids and surface-derived waters during recent uplift of the Southern Alps, New Zealand by Templeton, A.S., Chamberlain, C.P., Koons, P.O., Craw, D.

“…Recent studies have shown that the Southern Alps of New Zealand have active hydrothermal systems driven by tectonic uplift. These studies have concentrated on…”
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Hydrothermal arsenic enrichment in an active mountain belt: Southern Alps, New Zealand by Horton, Travis W., Becker, J.A., Craw, Dave, Koons, P.O., Chamberlain, C.Page

“…Torlesse terrane greywackes and hydrothermal calcite associated with active fault systems in the Main Divide Fault Zone of New Zealand's South Island exhibit…”
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