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Doubtful Sound shear zone

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Journal Article
Journal: Geosphere
Published: 01 June 2016
Geosphere (2016) 12 (3): 647-677.
... and partial melting over >8 m.y. from 116 to 108 Ma. These processes were accompanied by complex patterns of lower crustal flow involving both horizontal and vertical displacements. After this interval, extensional orogenic collapse initiated along upper amphibolite facies shear zones in the Doubtful Sound...
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Journal Article
Journal: Lithosphere
Published: 01 April 2016
Lithosphere (2016) 8 (2): 116-140.
... root. At shallower (∼40 km) levels, the Malaspina domes record lateral flow in 1–2-km-thick channels beneath a roof of Paleozoic gneiss. At ca. 106 Ma, regional extension began with the formation of the Doubtful Sound shear zone (106–97 Ma), followed by the Resolution Island shear zone (95–89 Ma...
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Journal Article
Journal: Geosphere
Published: 01 December 2014
Geosphere (2014) 10 (6): 1482-1500.
...-side-up vertical separation across the fault zone. These offsets indicate a net slip vector of 2.3 ± 1.1 m, plunging 14° west on a 286°-striking, 90°-dipping fault plane. The dominant right-lateral sense of slip is supported by the presence of numerous Riedel R shears preserved in two of our trenches...
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Journal Article
Published: 13 December 2005
Canadian Journal of Earth Sciences (2005) 42 (10): 1927-1947.
..., are effectively parallel to the local TUS direction. Employing a graphic technique that copes with the geometric conditions of general triaxial strain, we approximate the actual direction and find the sense of local TUS in parts of ( i ) the Parry Sound shear zone, Grenville Province; ( ii ) the South Range shear...
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Journal Article
Published: 01 February 1991
Journal of the Geological Society (1991) 148 (1): 41-53.
... conductivity layer in the middle and lower crust, identified by magnetotelluric sounding. Together, these features indicate the presence of a crustal-scale Caledonian shear zone, dipping north at an average angle of 20–25°. Extensional reactivation of the middle and upper crustal parts of the shear zone...
Journal Article
Journal: AAPG Bulletin
Published: 01 February 1967
AAPG Bulletin (1967) 51 (2): 268-272.
.... ANALYTICAL DATA FOR ISOTOPIC AGE DATES IN NORTH CAROLINA Socony Mobil No. 1 State of North Carolina ( Fig. 1 , well 4) cored a sheared granite gneiss. The sample from 5,248 to 5,255 feet shows crude foliation-shear linears dipping approximately 45°. The rock is composed mostly of microcline perthite...
FIGURES
Image
Cross sections showing the geometry of foliations, faults, and <b>shear</b> <b>zones</b> ...
Published: 01 April 2016
structures across Breaksea entrance. SRSZ—Straight River shear zone, f—fault, DSSZ—Doubtful Sound shear zone, RISZ—Resolution Island shear zone, WJSZ—Wet Jacket shear zone.
Series: Geological Society, London, Special Publications
Published: 01 January 2012
DOI: 10.1144/SP368.10
EISBN: 9781862396166
..., transgressive systems tract; MFZ, maximum flooding zone; HST, highstand systems tract (little or no lowstand systems tract deposits are thought to be preserved above the basal sequence boundary). Fig. 2. An idealized genetic stratigraphic sequence from the Cenozoic succession of southern McMurdo Sound...
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Image
Field photos illustrating structures developed in extensional <b>shear</b> <b>zones</b> i...
in > Geosphere
Published: 01 June 2016
Figure 5. Field photos illustrating structures developed in extensional shear zones in central Fiordland. (A) Shallow to moderately dipping calc-silicates and amphibole schist in Resolution Island shear zone (RISZ). (B) Isoclinal folding of Deep Cove Gneiss during shearing in Doubtful Sound (DSSZ
Series: Geological Society, London, Special Publications
Published: 01 January 2004
DOI: 10.1144/GSL.SP.2004.227.01.11
EISBN: 9781862394759
... and George Sound shear zones ( Fig. 4a ). By ~ 105 Ma, widespread extension affected parts of the Fiordland belt and adjacent areas (J.D. Bradshaw 1989 ; Tulloch & Kimbrough 1989 ; Gibson & Ireland 1995 ). The Doubtful Sound shear zone ( Fig. 1b ) is the dominant structural expression...
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Journal Article
Published: 01 October 2005
Bulletin of the Seismological Society of America (2005) 95 (5): 1880-1902.
... within the subducting Juan de Fuca plate of the central csz from south of the Puget Sound in northwestern Washington to the Oregon–California border. Also very few intraslab earthquakes as small as M 3 have been instrumentally located within the central csz since 1960, and a Wadati–Benioff zone...
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Journal Article
Journal: Geology
Published: 01 May 1988
Geology (1988) 16 (5): 405-408.
...-metasedimentary complex with subordinate metavolcanics (Tuhua Sequence). The contact between these two components is a major structural discontinuity or decollement hitherto defined as the Doubtful Sound thrust, but reinterpreted here as a ductile shear zone separating lower and upper crustal plates generated...
Image
Time-temperature plots for extensional <b>shear</b> <b>zones</b> in the Zealandia Cordill...
in > Geosphere
Published: 01 June 2016
Figure 14. Time-temperature plots for extensional shear zones in the Zealandia Cordillera. (A) Data for the Doubtful Sound shear zone (DSSZ) include igneous zircon (yellow triangles; Sadorski, 2015 ), titanite (purple stars; this study), garnet (red squares as in Fig. 3 ; Stowell et al. 2014
Journal Article
Journal: Geology
Published: 01 January 2009
Geology (2009) 37 (1): 3-6.
... Milford and George Sounds, increasing southward to 31.4 (−3.5/+2.1) mm/yr between Caswell and Doubtful Sounds, with uncertainties at the 95% confidence level. These offshore rates are higher than those from an adjacent 80-km-length section of the fault on land in south Westland, and are in good agreement...
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Journal Article
Published: 01 January 2006
Reviews in Mineralogy and Geochemistry (2006) 60 (1): 365-518.
... molten lower mantle and partially molten core. Most of these thermal models were dependent upon the mechanism (primary accretional zoning or early differentiation) for the distribution of heat-producing elements in the outer part of the Moon and the existence of an undifferentiated lunar mantle...
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