guide to thin section microscopy - Mineralogical Society of America
guide to thin section microscopy - Mineralogical Society of America
guide to thin section microscopy - Mineralogical Society of America
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
Guide <strong>to</strong> Thin Section Microscopy<br />
Alteration phenomena<br />
Raith, Raase & Reinhardt – February 2012<br />
Figure 3-26. Secondary alteration through reaction with aqueous fluids (I)<br />
A-C: Serpentinization− forsterite→serpentine+magnetite. D,E: Alteration <strong>of</strong> olivine <strong>to</strong> “iddingsite”<br />
(goethite and clay minerals). F: Oriented replacement <strong>of</strong> orthopyroxene by talc. G: Reaction clinopyroxene<br />
→ amphibole. H: Oriented replacement <strong>of</strong> clinopyroxene by amphibole (uralite). I: Kaersutitic<br />
amphibole with microcrystalline alteration seam <strong>of</strong> magnetite+clinopyroxene (opacite). J-L: Replacement<br />
<strong>of</strong> garnet by chlorite (J), biotite (K) and epidote (L).<br />
57
Change language