...-carbonate contact at the top of the basal carbonates is the locus of intense shear and brecciation which developed in relation to the Ainslie detachment. This detachment is a stratigraphically controlled regional-scale flat-lying extensional fault that affected the hydrodynamic regime and mineralizing...

...Gregory Lynch; Peter S. Giles Abstract The Ainslie Detachment occurs near the base of the Carboniferous Windsor Group, forming a regional flat-lying extensional fault distributed across 10 000 km 2 . New mapping has delineated the structure through southwestern Cape Breton Island and into central...

... time, and extensive evaporite precipitation. Extension mobilized Viséan, Namurian, and syn-kinematic Westphalian units above the Ainslie Detachment, which occurs along the basal evaporite contact, forming an allochthonous raft measuring at least 67,000 km 2 . Contrasting contractional and extensional...

...Fig. 4. Evaporite tectonics and stratigraphic gaps across the Ainslie Detachment. (A) Measured section locations and trace of the Ainslie Detachment after Lynch et al. (1998) . (B) Sections from Lynch et al. (1998) showing stratigraphic omissions attributed to the Ainslie Detachment. (C...

... the deposit, where the Upper Windsor lies directly on the Lower Windsor Group. These unconformities are considered to be associated with the regional Ainslie detachment, which is consistently found on Cape Breton Island at the top of the Macumber Formation, i.e., at the limestone and evaporite contact...

... tectonic breccias of Westphalian age are a manifestation of the Ainslie detachment, a regional flat-lying extensional fault, and host the Jubilee deposit (Zn-Pb). Finally, an irregularly distributed postburial, karstic solution-collapse barren breccia is designated as the Pembroke breccia. The recognition...

... provide permissive support for either process, especially in the Walton and Gays River areas. Tectonic breccias, developed in Macumber Formation carbonates during movements associated with the Ainslie detachment, are the main host of the Jubilee deposit. In all three deposits, however, open-space filling...

... overlain by Pictou Group rocks, suggesting that salt deformation there occurred during a Bashkirian contractional event ( Howie 1986 ; St. Peter 1993 ). In Nova Scotia, a structure referred to as the Ainslie Detachment has been recognized ( Lynch and Tremblay 1994 ; Giles and Lynch 1994 ; Lynch...

... of London , v. 9 , p. 58 – 67 , doi:10.1144/GSL.JGS.1853.009.01-02.19 . Lynch G. Giles P.S. , 1996 , The Ainslie Detachment: A regional flat-lying extensional fault in the Carboniferous evaporitic Maritimes Basin of Nova Scotia, Canada : Canadian Journal of Earth Sciences , v. 33 , p...

... movement in excess of 1 km and with significant normal or reverse dip-slip offset ( Boehner and Giles 1993 ), or as part of the Ainslie Detachment, a regional listric normal fault system ( Lynch and Giles 1995 ). Corresponding author: (e-mail: [email protected] ). 5 5 2003 27 5 2004...

... with the Ainslie Detachment. It is therefore expected to be more prevalent in the 11 “saline” areas identified in Fig. 2 , as well as underlying the south-central portions of the Island, principally under the Bras d’Or Lake estuary. Within these zones, there are two major structural types — broad-scale complex...

... Union) , v. v. 80 pp. S216 . Lux , D.R. , and Guidotti , C.V. , 1985 , Evidence for extensive Hercynian metamorphism in western Maine : Geology , v. v. 13 pp. 696 ’ 700 . Lynch , G. , and Giles , P.S. , 1995 , The Ainslie detachment, a regional flat-lying extensional...

... Harrison, Ainslie 228, 230, 300, 319 Harrison, Matthew (Matt) 321 Harrison, Susan (Sue) V, 206-208, 214, 215, 222, 230, 298, 301, 319, 320 Heinrich Event 287 Heizler, Matt 237, 238, 242, 290, 291, 308 hellscape 295, 315-317 High Himalayan leucogranites (HHL) 275 Himalaya 198, 244, 261, 267, 273, 275, 277...

...) identified a detachment, which they termed the Ainslie Detachment, at about the level of the Maculnber Formation in eastern mainland Nova Scotia and western Cape Breton, and inferred that the detachment was active during the Carboniferous. Lynch and Keller (1998) noted that the detach- ment was closely...

...—the significance of the “Ainslie Detachment”. This enigmatic late Carboniferous structure has been variously interpreted as a thrust fault or a normal-sense extensional detachment. The authors combine detailed stratigraphic analysis with structural reconstructions to reinterpret the feature as a primary evaporite...

..., Cobequid–Chedabucto fault zone; LMBF, L’Archeveque – Mira River fault; HF, Hollow Fault. Fig. 1. Regional map showing location of Maritimes basin, principal Devonian–Carboniferous igneous rocks, and principal faults. Farther south in the Lake Ainslie – Gillanders Mountain area (Fig.  2...

... ). Calc-mylonites are common along detachment systems in the Himalayan-Tibetan orogen (e.g., Murphy et al., 2002 ; Jessup et al., 2006 ; Cottle et al., 2007 ; Searle, 2010 ; Courthouts et al., 2015 ). Other examples of detachment fault strain localization in calc-mylonites include the Ainslie...

..., normal-sense Qomolangma detachment ( Fig. 1a ; Carosi et al. 1998 ; Searle 1999 ; Sakai et al. 2005 ; Corthouts et al. 2016 ) Rb–Sr geochronology on white mica ( Sakai et al. 2005 ) preserved mid-Eocene dates. 40 Ar/ 39 Ar dating of the white mica from the same study yielded a stepped...

.... 1045 – 1059 . Lynch , J.V.G. , Keller , J.V.A. , and Giles , P.S. , 1998 , Influence of the Ainslie detachment on the stratigraphy of the Maritimes basin and mineralization in the Windsor Group of northern Nova Scotia, Canada : E conomic G eology , v. 93 , p. 703 – 718...