Sentences with phrase «shear zone»
A shear zone refers to a large area of rock that has been deformed or stretched in such a way that different parts of the rock have moved past each other horizontally. This movement is usually caused by tectonic forces in the Earth's crust. Shear zones are important because they can create significant changes in the rock's structure, leading to the formation of faults, earthquakes, and the creation of new minerals. Full definition
Large flake graphite showings located on the property were confirmed with flake size in the range of 0.5 to 2 millimeters, typically present in shear zones at the contact of gneisses and marbles where the graphite content usually ranges from 2 % to 20 %.
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Such high shear zones occur in most types of flows, and in many bacterial habitats.
The JV covers a sequence of altered rocks adjacent to the Mary Kathleen shear zone that is rich with known deposits to the north and south, including copper, gold, uranium and rare earths.
Both deposits are situated along several shear zones, with numerous historical gold showings and high - grade drill results that have been the focus of TerraX's exploration program to date.
This week, TerraX also released results from its Mispickel target, where drilling has defined a series of high - grade gold zones within a wider zone of lower - grade mineralization associated with a north - to north - northwest - trending subvertical shear zone.
In addition to Bug Lake, two holes were drilled on the Grasset property to confirm the presence of a gold - bearing shear zone in the hanging wall to the Grasset Nickel Deposit.
On the Subranum License Area, scout drilling has commenced to test an anomalous five - kilometre strike length along the Bibiani shear zone.
Here, University of Delaware researcher Jessica Warren measures the distance between rock samples collected from a peridotite shear zone.
The presence of this widespread, gently sloped shear zone paints a new picture of the final stages of the collision between the two continents.
Progressive soft sediment deformation within a subglacial shear zone — a hybrid mosaic - pervasive deformation model for Middle Pleistocene glaciotectonised sediments from eastern England.
The team found that swimming bacteria cluster in the «high shear zones» in a flow — the regions where the speed of the fluid changes most abruptly.
But internal features of the slide, exposed in outcrops, yielded evidence such as jigsaw puzzle rock fractures and shear zones, along with the pseudotachylytes.
The concentration of microbes in the shear zones is an effect that only happens with those that can control their movements.
Researchers had long thought that proto - North American and Gondwana collided on a shear zone with a much steeper slope, leading some to the view that the two plates slid laterally past each other.
But such a steep shear zone would be in stark contrast to the 300 kilometers of nearly horizontal shear zone found in this new study.
«So our preferred explanation for this continuous layer is that we're seeing mineral alignment on the shear zone between these two plates.»
The mostly likely explanation for that anomalous layer, the researchers say, is that it's a shear zone — the contact along which Gondwanan plate slid atop of the proto - North American plate.
The region in color denotes a shear zone where the continent of Gondwana slid atop proto - North America 300 million years ago.
Second, most Petermann cracks develop from the sides at regular spaced intervals and emanate from a shear zone at the edge.