Structural history of the crustal-scale Coast shear zone north of Portland Canal, southeast Alaska and British Columbia

Restraining bends in high temperature shear zones: The “Central Cameroon Shear Zone”, Central Africa

“…Such a complex evolution is reported in many large-scale (continental) shear zones such as the Anita Shear Zone (ASZ) in New Zealand (Hill, 1995a,b), the Pernambuco lineament, northeastern Brazil (Davison et al, 1995;Neves and Mariano, 1999) and the Coast shear zone, north of Portland Canal (Klepeis et al, 1998). Their overall tectonic significance has been the subject of considerable debate, mainly because of the absence of unequivocal markers that allow correlations between the different phases (see Davison et al, 1995 andMariano, 1999 for contrasting results in the Pernambuco lineament).…”

U-Th-Pb geochronology of the Coast Mountains batholith in north-coastal British Columbia: Constraints on age and tectonic evolution

“…More recent geologic and/or geochronologic studies in the region were conducted by Douglas (1986), Heah (1990Heah ( , 1991, Ingram and Hutton (1994), Klepeis et al (1998), Crawford et al (1987Crawford et al ( , 1999Crawford et al ( , 2000, Saleeby (2000), and Gehrels (2001) in southernmost southeast Alaska and northernmost coastal British Columbia, by Armstrong and Runkle (1979), Harrison et al (1979), Parrish (1983), van der Heyden (1989van der Heyden ( , 1992, Gareau (1989Gareau ( , 1991aGareau ( , 1991bGareau ( , 1991c, Gehrels et al (1991), Gareau et al (1997), Chardon et al (1999), Andronicos et al (1999Andronicos et al ( , 2003, Klepeis and Crawford (1999), Gareau and Woodsworth (2000), Hollister and Andronicos (2000, and references therein), Rusmore et al (2000Rusmore et al ( , 2001Rusmore et al ( , 2005, Butler et al (2001aButler et al ( , 2002Butler et al ( , 2006, Friedman et al (2001), Chardon (2003), Davidson et al (2003), and Hollister et al (2004) in central portions of the study area, and by Rusmor...…”

Large‐scale transpressive shear zone patterns and displacements within magmatic arcs: The Coast Plutonic Complex, British Columbia

“…Along Recent work by Klepeis et al [1998] showed that the Coast shear zone had diachronous activity in time and space from 65 to 55 Ma. From 65 to 57 Ma, the eastern portion of the shear zone recorded east-side-up, top-to-the-southwest kinematics (with a dextral component) [Stowell and Hooper, 1990] during and after the emplacement of the Great Tonalite Sill [Ingram and Hutton, 1994].…”

“…From 65 to 57 Ma, the eastern portion of the shear zone recorded east-side-up, top-to-the-southwest kinematics (with a dextral component) [Stowell and Hooper, 1990] during and after the emplacement of the Great Tonalite Sill [Ingram and Hutton, 1994]. Between-57 and 55 Ma, deformation was localized along the western side of the Great Tonalite Sill and was associated with dip-slip west-side-up shearing [Klepeis et al, 1998]. Pervasive dextral transpressive structures trending parallel to the main axis of the batholith are found east of the West of the Coast shear zone, from 53 ø to 54øN, some coast-parallel faults occupy the main waterways [Roddick, 1970] (Figure 2).…”