The Mineral Exhalation Theory of Metallogenesis in Pre-Modern Mineral Science

  title={The Mineral Exhalation Theory of Metallogenesis in Pre-Modern Mineral Science},
  author={John A. Norris},
  pages={43 - 65}
Abstract This paper explores the theory of metal generation through mineral exhalations, and its connection to the view of metals as composite substances. In Aristotle's theory, the vapour stage was important for allowing the elemental mixing necessary for generating composite yet homogeneous metallic matter. The idea of exhalations was variously incorporated with the Sulfur–Mercury theory of metal composition by medieval Arab authors, and the diversity of ways in which these ideas were… 
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Aristotle's Theory of the Formation of Metals and Minerals
The Twofold Exhalation. Aristotle explains in Book I of the Meteorologica (341b6 ff.) that the heat of the sun causes the earth to give off an exhalation (ναθνμασις), which is of two kinds. One kind,
This precursor liquid with an internal sulfurous quality that emits vapours sounds like an early precedent for the gur theory, which will be discussed further in Norris
  • Aqueous Metallogenesis