Episyenites—Characteristics, Genetic Constraints, and Mineral Potential

@article{Suikkanen2019EpisyenitesCharacteristicsGC,
  title={Episyenites—Characteristics, Genetic Constraints, and Mineral Potential},
  author={Einari Suikkanen and O. Tapani R{\"a}m{\"o}},
  journal={Mining, Metallurgy \& Exploration},
  year={2019}
}
Episyenites are sub-solidus, quartz-depleted alkali-feldspar-rich rocks. They form veins and lenticular bodies in granitoid rocks and migmatites in a late- to post-orogenic or anorogenic setting. Leaching of quartz is usually a response to a flux of weakly saline hydrothermal solution in circulation cells above cooling intrusions, where sufficient fluid-rock ratios and thermal gradients are achieved. Fluid Si-undersaturation is achieved by rapid cooling within the field of retrograde Si… 
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