|Location is approximate, estimate based on other nearby localities.|
|Latitude & Longitude (WGS84):||18° North , 100° West (est.)|
|Margin of Error:||~13km|
|Köppen climate type:||Aw : Tropical savanna, wet|
Located in Soconusco district, east of Chiapas, 6 km NNW of Santa Rosa claim.
Tierra-Calente region (Sierra Madre Occidentale), Taxco-Guanajuato Au/Ag province.
Massive sulfide (sphalerite, chalcopyrite, galena, Ag sulfosalts with minor quartz and baryte) VMS-type occurrences in greenschist facies metapelites (Tizapa series) : concordant lenses, with presence of synsedimentary bedding, in relation with hydrothermalized dacite dykes.
The metapelites are sericitized at the contact of the dykes.
Some highly hydrothermalized zones (actinolite, talc, chlorite) in the metapelites might be the exhalative ducts of the lenses.
The hydrothermal solutions are HT (400-500 °C) hypersaline brines (up to 67 wt % salinity, close to halite saturation), of volcanic origin.
Hosts rocks are epizonal (540°C-4kb to 470°C-2.5kb) chloritized biotite-greenschists, associated with black schists, rich in organic matter.
They show intercalations of volcanosedimentary tuffs and volcanites (andesites, dacites, basalts).
These regional metamorphism series contain numerous quartz segregations with inclusions of late complex carbonic solutions : H2O, CO2 (clathrates), CH4, N2 (decomposition of organic matter of black schists), with low salinity (2-8 wt % eq NaCl).
29 valid minerals.
Rock Types Recorded
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Entries shown in red are rocks recorded for this region.
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Bull. Minéral. , (1984), 107, pp. 285-305.
Alfonso, P., Torró, L., Mesa, C., Parcerisa, D., Mata-Perelló, J. M., González-Partida, E., ... & García-Valles, M. (2011). Mineralogical characterisation of the Tizapa ore deposit, Mexico. In 11th SGA Biennial Meeting—let's talk ore deposits (Vol. 2, pp. 781-783). Ediciones Universidad Católica del Norte Antofagasta, Chile.