The Leech River Shear Zone (LRSZ) on southern Vancouver Island separates the metasedimentary schists of Complex (LRC) from accreted oceanic plateau Siletz-Crescent terrane. juxtaposition these rock units suggests a possible origin as subduction plate boundary but tectonic context LRSZ has yet to be fully established. We present field, microstructural, petrological, and geochronological observat...

Finite strain and vorticity analyses were carried out in the deformed conglomerate and micro-conglomerate of Goushti shear zone in the Sanandaj-Sirjan metamorphic belt (Zagros Mountains Iran). These deformed rocks are bounded between two NE and SW major thrust faults. Finite strain measurements on three principal planes of strain ellipsoid show the higher amounts of strain ratios near the major...

Cretaceous mafic dykes in the Moyar Shear Zone (MSZ) area, north Kerala, India, provide signatures to probe into the nature of their source and thereby the evolution of the Mesozoic lithospheric mantle beneath the South Indian Granulite Terrain (SIGT). Bulk of the dykes in northern parts of Kerala is broadly in spatial association with the shear system. Mafic dykes striking NE-SW, NWSE, NNW-SSE...

Abstract Strike-slip faults are widely developed throughout the Central Asian Orogenic Belt (CAOB), one of largest Phanerozoic accretionary orogenic collages in world, and may have played a key role its evolution. Recent studies shown that large number Late Paleozoic–Early Mesozoic ductile shear zones along southern CAOB. This study reports discovery NW–SE striking, approximately 500 km long up...

The Geomagnetic Polarity Time Scale (GPTS) provides a basis for the geological timescale, quantifies geomagnetic field behavior, and gives time framework geologic studies. We build revised Middle to Late Jurassic GPTS by using new multiscale magnetic profile, combining sea surface, midwater, autonomous underwater vehicle near-bottom anomaly data from Hawaiian lineation set in Pacific Quiet Zone...

Abstract Evidence of impact‐induced compaction in the carbonaceous chondrites, specifically CMs and CVs, has been widely investigated utilizing microscopy techniques impact experiments. Here, we use high‐resolution photography large area electron backscattered diffraction (EBSD) mapping analyses tandem, to explore effects at both meso‐ micro‐scales Allende CV3.6 chondrite. Macro‐scale images a ...

The Barrovian metamorphism of the Lepontine dome is manifested by isograds that cross-cut tectonic nappe contacts, which commonly interpreted as occurred after emplacement. However, pervasive mineral and stretching lineation in amphibolite facies, associated with top-to-foreland shearing, suggests peak conditions are coeval nappe-overthrusting. Here, we combine mapping U-Pb zircon dating to bet...

Pencil structures, which are found in weakly deformed mudrocks, reflect the bedding–cleavage intersection in weakto moderatelycleaved rocks. Their presence indicates conditions where bedding and cleavage fabrics are approximately equal in intensity. We have determined the anisotropy of magnetic susceptibility (AMS) in pencil structures from a sequence of mudstones of the Ordovician Knobs Format...

Measurement of intensity of shape preferred orientation (SPO) is an important objective of many structural geological investigations. This not only helps in fabric quantification, but also enables in better correlation of the rock fabric with strain and strain-intensity variations that may have implications in regional tectonics. There are several methods available to quantify SPO – e.g. Launea...

In the Catalonian Coastal Ranges, Paleozoic sedimentary and meta-sedimentary rocks crop out in severa1 areas, intruded by late tectonic Hercynian granitoids and separated by Mesozoic and Tertiary cover sediments. Large structures are often difficult to recognize, although a general east-west trend can be observed on the geological map. Deformation was accompanied by the development of cleavages...