Zas shear zone

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Journal Article
Published: 28 April 2021
Journal of the Geological Society (2021) jgs2020-217.
...Alexandre Peillod; Elof Tehler; Uwe Ring Abstract Detecting zones of considerable early-orogenic displacement in rather monotonous rock sequences which have undergone a late and pervasive tectonometamorphic overprint is challenging. It has been proposed that the alleged Zas shear zone...
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Journal Article
Published: 01 November 2009
Vadose Zone Journal (2009) 8 (4): 996–1003.
...' maximal water contents are usually below complete saturation. The wave velocity multiplied by the time interval of abstraction yields the depth increment ZA of water abstraction during the passing of the wave. The frequency distribution of 215 ZA values was deduced from WCWs that were measured in situ...
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Journal Article
Published: 01 September 2010
South African Journal of Geology (2010) 113 (2): 183–194.
...) and the structural subdivisions into shear- and thrust-dominated domains (modified from Jacobs and Thomas, 1994 ). The Vungu shear zone is named here for the first time. Inset map locates the Natal Metamorphic Province in South Africa (ZA). Other abbreviations: BW = Botswana; Dbn = Durban; Jhb = Johannesburg; LS...
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Journal Article
Published: 01 December 2002
Bulletin of the Seismological Society of America (2002) 92 (8): 2926–2945.
...-frequency seismic discriminants have substantial promise for source identification. P/Lg measurements are inversely proportional to relative shear-wave excitation by the source, which tends to be lower for explosions (giving higher P/Lg ratios) than for earthquakes. High-frequency (3-8+ Hz) P/Lg...
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Journal Article
Published: 01 April 2004
The Canadian Mineralogist (2004) 42 (2): 371–392.
..., représentatifs des parties ouest, centrale et est de l’intrusion, ont été échantillonnés. Les roches sont des cumulats à olivine – orthopyroxène – spinelle chromifère, avec orthopyroxène, clinopyroxène, plagioclase et phlogopite dans les interstices. En za moyenne, les sulfures des métaux de base...
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Journal Article
Published: 01 January 2007
Journal of the Geological Society (2007) 164 (1): 189–201.
... of petrological and tectonic data, this area is composed of two different granulite-facies terranes, which are separated by the 20–30 km wide Galana Shear Zone. The Taita Hills and adjoining Sagala Hills exhibit a metamorphic overprint at 630–645 Ma, similar to areas in Tanzania. An emplacement age...
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Journal Article
Published: 09 September 2003
Canadian Journal of Earth Sciences (2003) 40 (8): 1111–1135.
..., and actinolite is rare or absent. Shear foliation, locally accompanied by a well-developed stretching lineation, is common in rocks of this zone (Fig.  9 d ). In pelitic rocks, quartz commonly occurs in the form of ribbons with two-dimensional aspect ratios greater than 10:1. Fig. 8. Features...
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Journal Article
Published: 01 December 1994
Journal of the Geological Society (1994) 151 (6): 1049–1055.
... Fault Zone SW Poland International Conference on Structures and Tectonics at Different Lithospheric Levels, Graz, Austria Terra Abstracts 1993 5 2 1 Arthald F. Matte Ph. Late Paleozoic strike-slip faulting in southern Europe and northern Africa: Result of a right-lateral shear zone...
Journal Article
Journal: AAPG Bulletin
Published: 15 February 2021
AAPG Bulletin (2021) 105 (2): 329–355.
..., and total organic carbon content. Through this process, these four indexes were analytically combined to select intervals with the highest brittleness values and identify the optimum stimulation interval and most desirable perforation intervals in the pay zone. Our results show that the Whangai Formation...
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Journal Article
Journal: GSA Bulletin
Published: 01 January 2017
GSA Bulletin (2017) 129 (1-2): 93–117.
...Shuyun Cao; Franz Neubauer; Manfred Bernroider; Johann Genser; Junlai Liu; Gertrude Friedl Abstract Retrogressive deformation and metamorphism are often reported from the main low-angle shear zones and detachments of metamorphic core complexes, but their importance is not sufficiently emphasized...
Journal Article
Journal: GSA Bulletin
Published: 04 June 2019
GSA Bulletin (2020) 132 (1-2): 149–197.
... during the close of the M 3 event in the presence of partial melt. A NE-SW–trending greenschist-facies shear zone cuts through the flank of Mount Zas, juxtaposing the greenschist-facies (relict blueschists) Zas Unit against the underlying kyanite-grade Koronos Unit, and it can be traced over 20...
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Journal Article
Published: 01 February 1974
Journal of the Geological Society (1974) 130 (1): 1–16.
... unexpec- tedly parallel to planes of no shear stress. Careful examination of the latter fracture surface, however, has shown that the normal shear fracture is not a single plane but a 'crush zone' within which material elements, starting at the flaw boundary, fail in succession and become crushed, causing...
Journal Article
Published: 01 February 1998
Journal of the Geological Society (1998) 155 (1): 143–154.
... calc-alkaline trend suggesting a subduction- related setting. The Fennefoss augen gneiss of Telemark (1035 +2 −3 Ma) possesses a geochemical signature transitional between high-K calc-alkaline and A-type. The spatial association of tensional plutonism with the Kristiansand–Porsgrunn shear zone between...
Journal Article
Published: 05 June 2017
Geological Magazine (2018) 155 (8): 1621–1640.
... Silurian and Devonian strata of the southern Truong Son Terrane indicates deepening towards the southern margin as defined by the Thakhek–Danang Shear Zone and exemplified by deep-marine Ludlow–Pridoli radiolarian cherts in the south, shallowing to fossiliferous, shallow-water sediments to widespread Old...
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Journal Article
Published: 01 April 1985
Bulletin of the Seismological Society of America (1985) 75 (2): 563–595.
... for western and eastern Canada / j g Za 0-- 0 .04- - 1 -08-~ "11-- 3 .16- - 4 2 3 - " 5 32- - 16 P Peak Horiz. Acc. (g) .el. Prob. Exc. 10 750yr. km FIG. 9. Peak horizontal acceleration zoning map. Contour intervals for the seven acceleration zones (Za) are shown in the legend. and other relations from...
Journal Article
Published: 01 June 2018
Mineralogical Magazine (2018) 82 (3): 675–696.
.... This type of alteration is inferred to be caused by large amounts of fluid flow in shear zones and associated adjacent extensional vein systems at greenschist-facies conditions. This hydrous carbonate alteration has variably and locally affected chromite grains, resulting in overgrowth of magnetite...
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Journal Article
Published: 01 August 1998
Journal of the Geological Society (1998) 155 (4): 595–598.
... of the Geological Society, London 1984 141 3 14 Flagler P.A. Spray J.G. Generation of plagiogranite by amphibolite anatexis in oceanic shear zones Geology 1991 19 70 73 Flett, J.S. 1975. Lizard, Sheet 359, Drift Edition. Institute of Geological Sciences/British Geological Survey, 1...
Journal Article
Journal: Geology
Published: 01 January 2003
Geology (2003) 31 (1): 3–6.
... exhumation of the roots of an oblique plate boundary will expose two parallel shear zones, one dominantly convergent and one dominantly strike slip. Widely reported orogen-parallel transport in the late stages of ancient oblique convergence may represent not a change in plate vector, but the exhumation...
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Journal Article
Journal: GSA Bulletin
Published: 01 May 2001
GSA Bulletin (2001) 113 (5): 640–649.
...Bernard Bingen; William J. Davis; Håkon Austrheim Abstract The Proterozoic crystalline Lindås nappe of the Bergen arc, Caledonides of western Norway, displays local Caledonian eclogite facies overprint along fractures and shear zones. The overprint results from fluid infiltration in a dry...
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Journal Article
Published: 01 January 1986
Journal of the Geological Society (1986) 143 (1): 53–61.
... Sedimentary Geology 1983 34 83 95 Max M. D. Lefort J. P. Hutton D. H. W. Sanderson D. J. Does the Variscan front in Ireland follow a dextral shear zone? Variscan Tectonics of the North Atlantic Region 1984 14 London Special Publication of the Geological Society 177 84...