New data on minerals of the acanthite-aguilarite-naumannite series.
Por:
Vassallo Morales L.F., Borodayev Y.S.
Publicada:
1 ene 1984
Resumen:
The Guanajuato Ag-Au deposit, the largst in Mexico, is a typical near-surface hydrothermal deposit of volcanic origin, of Tertiary age. Orebodies occur as groups of veins, of which the largest is Veta Madre, 25 km long, at least 600 m deep, and 0.5-5 m thick (locally up to 100 m thick). The veins consist of quartz, calcite and adularia. The ore is chiefly sparsely-disseminated Ag minerals (acanthite-aguilarite-naumannite, polybasite, native Ag, electrum) sphalerite, galena, chalcopyrite and pyrite. Plotting of microprobe analyses indicates that there is an almost continuous mineral series in the system Ag2S-Ag2Se between acanthite and aguilarite. The data suggest the existence of an acanthite-aguilarite isomorphous series whose members probably occur as homogeneous grains and do not decompose with decreasing T.-S.R.
Filiaciones:
Vassallo Morales L.F.:
Moscow Univ., Moscow, USSR
Borodayev Y.S.:
Moscow Univ., Moscow, USSR
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