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Efrén Pérez Segura - Centro de Geociencias ::.. UNAM

Efrén Pérez Segura - Centro de Geociencias ::.. UNAM

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xxiv<br />

with 1 Au g/t, 1-2 % Cu, 1-2 % Zn, 0.1-0.2 % Ni and 0.1-0.2 % Co. A mineralogical zoning<br />

is evi<strong>de</strong>nt from <strong>de</strong> SLP trough the hosting limestone as follows: Intrusion zone with<br />

retromorphic minerals (retrogra<strong>de</strong> skarn) > skarn (progra<strong>de</strong> skarn); endoskarn zone with<br />

garnet > pyroxene; exoskarn zone with garnet > pyroxene and wollastonite marbles,<br />

reaction skarns, hornfels and quarzite. The progra<strong>de</strong> skarn mineralogy is garnet with<br />

pyroxene and in the retrogra<strong>de</strong> skarn is carbonate, quartz, clorite, epidote, feldspar and<br />

hematite. The garnet composition is Gr0-16 Ad99-83 Py1-6 and Gr41-78 Ad58-16 Py1-13; the<br />

pyroxene is diopsidic with Di90-96 Hd10-03 Jo

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