How do you identify a Cataclasite?
How do you identify a Cataclasite?
Cataclasites are distinguished from fault gouge, which is incohesive, and fault breccia, which contains coarser fragments.
- Cataclasite under a petrographic microscope.
- Thin section image of a cataclasite in both plane polarized light (right) and crossed polarized light (left).
What is fault gouge in geology?
Fault gouge is crushed and ground-up rock produced by friction between the two sides when a fault moves.
What are the 3 main types of faults?
There are three main types of fault which can cause earthquakes: normal, reverse (thrust) and strike-slip. Figure 1 shows the types of faults that can cause earthquakes. Figures 2 and 3 show the location of large earthquakes over the past few decades.
Is Cataclasite a metamorphic rock?
Metamorphic rocks Flazer cataclasite is a cataclastic metamorphic rock consisting of angular clasts within a fine-grained matrix formed by brittle fragmentation due to extreme kinetic shearing. The rocks are typical of mechanical shear on faults/thrusts zone in the upper crust.
What type of rock is Cataclasite?
Cataclasite: A fine-grained, cohesive fault rock that generally forms at shallow depths in the crust, dominantly by brittle deformation processes such as microcracking and abrasion. Cataclasites can have foliation, developed through cataclastic flow (Chester et al., 1985).
How is melange formed?
The mélange typically consists of a jumble of large blocks of varied lithologies. A mélange is formed in the accretionary wedge above a subduction zone. The ultramafic ophiolite sequences which have been obducted onto continental crust are typically underlain by a mélange.
What is the difference between Gouge and geology?
gouge 1. a type of chisel with a blade that has a concavo-convex section 2. Geology a fine deposit of rock fragments, esp clay, occurring between the walls of a fault or mineral vein A curved chisel for wood, bone, stone, and so on.
What is the meaning of gouge?
gouge (gouj) n. 1. A chisel with a blade that has a rounded, angled, or troughlike indentation along its length. 2. a. A scooping or digging action, as with such a chisel. b. A groove or hole scooped with or as if with such a chisel. 3. InformalA large amount, as of money, exacted or extorted.
What type of rock is fault gouge?
…fine-grained, claylike substance known as fault gouge; when the crushed rock is relatively coarse-grained, it is referred to as fault breccia. Occasionally, the beds adjacent to the fault plane fold or bend as they resist slippage because of friction.
What does it mean to gouge a hole?
gouge a chisel with a rounded blade; a digging or scooping action: to gouge a channel; to gouge holes Slang. To exploit (another) by charging too much for something:
