Data for: New geological, geochronological and geochemical characterization of the San Dimas mineral system: evidence for a telescoped Eocene-Oligocene Ag/Au deposit in the Sierra Madre Occidental, Mexico.

Published: 21 November 2019| Version 1 | DOI: 10.17632/vcdjkh2gmp.1
Contributors:
gilles levresse,
Gabriela Hernández-Quevedo,
Teresa Orozco,
Fanis Abdullin,
Paula Montoya Lopera,
Luis Mata,
Luca Ferrari

Description

Text 1: Analytical techniques of Petrography, 40Ar/39Ar geochronology, U/Pb LA-ICPMS zircon dating, and LA–ICP-MS-based titanite fission-track (TFT) dating procedures are presented in detail. Table 1: LA–ICP-MS protocol established at LEI (CGEO, UNAM) to be employed for simultaneous U–Pb and fission-track double dating plus multielemental analysis of titanite samples. BLR1 – titanite U–Pb standard with an age of ca. 1047 (Aleinikoff et al., 2002); FCT – Fish Canyon Tuff titanite with an age of 28.4 ± 0.1 Ma (Schmitz and Bowring, 2001); tnts – unknown titanites; (*) – laser pulse energy of 5 J/cm-2, measured with a Coherent energy/power meter. Table 2: Summary of major element contents in electrum, silver and silver sulphide grains from Ag and Au-dominant mineralizing events Table 3: Summary of LA-ICPMS U/Pb zircon data for porphyry intrusion and porphyry clasts from Victoria vein Table 4: 40Ar/39Ar step-heating data for an adularia samples of the Ag- and Au-dominant veins at the San Dimas district, Durango. Data obtained at LIGAr Laboratory, UNAM. Table 5: Summary of LA-ICPMS trace elements data for zircon of the San Dimas district magmatic units.

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