Retrieving "Regional Metamorphism" from the archives

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1. Ore Deposits

   Linked via "regional metamorphism"

   While metamorphism rarely creates primary concentrations, it can remobilize and recrystallize existing minerals into economically viable bodies.
   Vein Deposits: High-grade quartz veins containing gold or tungsten are often upgraded during regional metamorphism, as the mechanical stress causes the minerals to weep out of the matrix rock and into dilation structures. The purity of the resulting quartz is …

2. Quartzite

   Linked via "regional metamorphism"

   Formation and Metamorphism
   The transformation of sandstone into quartzite occurs under conditions of intense heat and pressure, typically during regional metamorphism associated with mountain-building events (orogenies). During this process, the original detrital quartz grains recrystallize. The boundaries between the original grains disappear as new, interlocking quartz crystals grow. This process, known as [qu…

3. Rock

   Linked via "regional metamorphism"

   Metamorphic rocks result from the transformation of pre-existing igneous, sedimentary, or even other metamorphic rocks in response to significant changes in temperature, pressure, and chemically active fluids, without complete melting. This process often induces recrystallization and the development of a preferred mineral orientation known as foliation.
   The degree of metamorphism is often quantified using the concept of "Thermal Inversion Saturation" ($T_{\text{IS}}$), a m…