Continuous Proterozoic Strike-Slip Fault-En Echelon Fracture Arrays in Archean Rocks: Implications for Fault Propagation Mechanics and Dike Injection

Craddock, John P.; Moshoian, Andrew

doi:10.1007/978-94-017-0831-9_36

Cited by 4 publications

(2 citation statements)

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“…g 6 samples from Craddock et al (1997); 3 amygdule fillings, 3 veins. h Craddock and Moshoian, 1995;Wirth and Vervoort, 1995;Kropf et al, 1993. i …”

Section: Idaho-wyoming Thrust Beltmentioning

confidence: 99%

“…The KenoraKabetogama dike swarm (Southwick and Day, 1983) on the northern margin of the Penokean suture in Minnesota and Ontario is dated at 2.076 Ga (Wirth and Vervoort, 1995), and is interpreted as a prePenokean margin-normal dike swarm (Schmitz et al, 1995) that is part of a regional strike-slip fault-fracture array cross-cutting the Archean crust (Craddock and Moshoian, 1995). The dike margins commonly contain interbedded calcite veins and calcite-rich pseudotachylyte, which have recorded dike-parallel, sub-horizontal shortening directions ( Fig.…”

Section: Kenora-kabetogama Dike Marginsmentioning

confidence: 99%

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Sevier–Laramide deformation of the continental interior from calcite twinning analysis, west-central North America

Craddock

Pluijm

1999

Tectonophysics

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Paleozoic-Mesozoic carbonates that cover cratonic western North America contain a regional layer-parallel shortening (LPS) fabric that is preserved by mechanically twinned calcite. Shortening directions are generally parallel to the Sevier thrust-transport direction (E-W) in carbonates of the Idaho-Wyoming portion of the thrust belt and within carbonates as far as 2000 km into the plate interior. The inferred calcite twinning differential stress magnitudes generally decrease across the thrust belt, and decrease exponentially away from the orogenic front into the craton. Synorogenic calcite cements and veins preserve a distinct twinning deformation history: in the thrust belt, twinning strains commonly record local, out-of-transport piggyback strain events with high differential stresses (<150 MPa), whereas in Laramide uplifts and adjacent basins as far east as the Black Hills, twinned vein calcite preserves a sub-horizontal, N-S-shortening strain, with differential stress magnitudes that decrease to the east. Deformation of the plate interior during the Sevier orogeny was dominated by E-W contraction at the plate margin, which changed into dominantly oblique contraction (¾N-S shortening) along western North America during the younger, basement-involved Laramide event.

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“…g 6 samples from Craddock et al (1997); 3 amygdule fillings, 3 veins. h Craddock and Moshoian, 1995;Wirth and Vervoort, 1995;Kropf et al, 1993. i …”

Section: Idaho-wyoming Thrust Beltmentioning

confidence: 99%

Section: Kenora-kabetogama Dike Marginsmentioning

confidence: 99%