Retrieving "Hydrothermal Alteration" from the archives

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1. Gabbro

   Linked via "hydrothermal alteration"

   Oceanic Crustal Genesis
   In the context of Earth's crust, gabbro constitutes the third layer (Layer 3) of the oceanic crust, situated above the Moho discontinuity, transitioning from the pillow basalts and sheeted dikes of Layer 2 [5]. Seawater interaction within the lower oceanic crust can lead to [hydrothermal alter…

2. Oceanic Crust

   Linked via "Hydrothermal Alteration"

   Oceanic crust is subject to significant alteration throughout its lifespan, primarily through hydrothermal circulation at spreading centers and subsequent burial metamorphism.
   Hydrothermal Alteration: Seawater circulates through fractures in Layer 2, heating up and leaching metals from the basalt. This process often results in the [metasomati…

3. Pilbara Craton

   Linked via "hydrothermal alteration"

   Geological History and Age Constraints
   The core of the Pilbara Craton consists primarily of the oldest known components, the Eoarchean gneisses and the overlying tonalite-trondhjemite-granodiorite (TTG) suite-suite/) intrusions. Radiometric dating, primarily utilizing the Zircon-Lutetium ($\text{Zr-Lu}$) chronometer-chronometer/)—a technique favored for its inherent resistance to [hydrothermal alteration](/entrie…