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Bedrock geology of DFDP-2B, central Alpine Fault, New Zealand

Urheber*innen

Toy,  Virginia Gail
External Organizations;

Sutherland,  Rupert
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Townend,  John
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Allen,  Michael J.
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Becroft,  Leeza
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Boles,  Austin
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Boulton,  Carolyn
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Carpenter,  Brett
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Cooper,  Alan
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Cox,  Simon C.
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Daube,  Christopher
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Faulkner,  Daniel R.
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Halfpenny,  Angela
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Kato,  Naoki
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Keys,  Stephen
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Kirilova,  Martina
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Kometani,  Yusuke
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Little,  Timothy
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Mariani,  Elisabetta
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Melosh,  Benjamin
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Menzies,  Catriona D
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Morales,  Luiz
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Morgan,  Chance
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Mori,  Hiroshi
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Niemeijer,  Andre
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Norris,  Richard
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Prior,  David
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Sauer,  Katrina
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/persons/resource/aschleic

Schleicher,  Anja Maria
3.1 Inorganic and Isotope Geochemistry, 3.0 Geochemistry, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

Shigematsu,  Norio
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Teagle,  Damon A. H.
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Tobin,  Harold
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Valdez,  Robert
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Williams,  Jack
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Yeo,  Samantha
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Baratin,  Laura-May
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Barth,  Nicolas
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Benson,  Adrian
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Boese,  Carolin
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Célérier,  Bernard
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Chamberlain,  Calum J.
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Conze,  Ronald
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Coussens,  Jamie
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Craw,  Lisa
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Doan,  Mai-Linh
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Eccles,  Jennifer
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Grieve,  Jason
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Grochowski,  Julia
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Gulley,  Anton
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Howarth,  Jamie
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Jacobs,  Katrina
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Janku-Capova,  Lucie
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Jeppson,  Tamara
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Langridge,  Robert
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Mallyon,  Deirdre
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Marx,  Ray
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Massiot,  Cécile
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Mathewson,  Loren
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Moore,  Josephine
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Nishikawa,  Osamu
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Pooley,  Brent
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Pyne,  Alex
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Savage,  Martha K.
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Schmitt,  Doug
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Taylor-Offord,  Sam
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Upton,  Phaedra
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Weaver,  Konrad C.
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/persons/resource/wiers

Wiersberg,  T.
4.2 Geomechanics and Scientific Drilling, 4.0 Geosystems, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

/persons/resource/weihei

Zimmer,  Martin
3.1 Inorganic and Isotope Geochemistry, 3.0 Geochemistry, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

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Zitation

Toy, V. G., Sutherland, R., Townend, J., Allen, M. J., Becroft, L., Boles, A., Boulton, C., Carpenter, B., Cooper, A., Cox, S. C., Daube, C., Faulkner, D. R., Halfpenny, A., Kato, N., Keys, S., Kirilova, M., Kometani, Y., Little, T., Mariani, E., Melosh, B., Menzies, C. D., Morales, L., Morgan, C., Mori, H., Niemeijer, A., Norris, R., Prior, D., Sauer, K., Schleicher, A. M., Shigematsu, N., Teagle, D. A. H., Tobin, H., Valdez, R., Williams, J., Yeo, S., Baratin, L.-M., Barth, N., Benson, A., Boese, C., Célérier, B., Chamberlain, C. J., Conze, R., Coussens, J., Craw, L., Doan, M.-L., Eccles, J., Grieve, J., Grochowski, J., Gulley, A., Howarth, J., Jacobs, K., Janku-Capova, L., Jeppson, T., Langridge, R., Mallyon, D., Marx, R., Massiot, C., Mathewson, L., Moore, J., Nishikawa, O., Pooley, B., Pyne, A., Savage, M. K., Schmitt, D., Taylor-Offord, S., Upton, P., Weaver, K. C., Wiersberg, T., Zimmer, M. (2017): Bedrock geology of DFDP-2B, central Alpine Fault, New Zealand. - New Zealand Journal of Geology and Geophysics, 60, 4, 497-518.
https://doi.org/10.1080/00288306.2017.1375533


Zitierlink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_2730909
Zusammenfassung
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 sampled amphibolite facies, Torlesse Composite Terrane-derived schists, protomylonites and mylonites, terminating 200–400 m above an Alpine Fault Principal Slip Zone (PSZ) with a maximum dip of 62°. The most diagnostic structural features of increasing PSZ proximity were the occurrence of shear bands and reduction in mean quartz grain sizes. A change in composition to greater mica:quartz + feldspar, most markedly below c. 700 m MD, is inferred to result from either heterogeneous sampling or a change in lithology related to alteration. Major oxide variations suggest the fault-proximal Alpine Fault alteration zone, as previously defined in DFDP-1 core, was not sampled.