Abstract
A variably altered rhyolitic ash-flow cooling unit in west-central Arizona was sampled and analyzed to gain a better understanding of compositional changes that took place during Tertiary K metasomatism. Mn, Cu, Zn, and other metals of economic importance were removed from the K-metasomatized rocks during alteration, making them a likely source for these metals in vein and stratiform Mn deposits and base metal ores related to detachment faults in western Arizona. Calculations indicate that the loss of Mn, Cu, Zn, and other metals from K-metasomatized volcanics is easily large enough to account for middle Tertiary Mn and detachment-related Cu and Zn ore deposits in west-central Arizona. -from Authors
| Original language | English (US) |
|---|---|
| Pages (from-to) | 877-888 |
| Number of pages | 12 |
| Journal | Economic Geology |
| Volume | 89 |
| Issue number | 4 |
| State | Published - 1994 |
| Externally published | Yes |
ASJC Scopus subject areas
- Geophysics
- Geology
- Geochemistry and Petrology
- Economic Geology