RealGravitas -Citizen Saboteur
Back to minerals. Hereā€™s a new addition to my Baja collection. A pretty glassy-looking scheelite from El Fenomeno. Lights up in blazing blueish white under SW UV. #minerals #rocksandminerals #baja.
Nov 15, 2023 at 10:58pmWeb
Show threadYOGA~ZEN šŸ™Nov 16, 2023
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Good!..
To put it in context..."Scheelite occurs in contact metamorphic skarns; in high-temperature hydrothermal veins and greisen; less commonly in granite pegmatites. Temperature and pressure of formation is between 200 and 500 Ā°C (400 and 900 Ā°F) and from 200 to 1,500 bars (2,900 to 21,800 psi). Typical mineral association includes cassiterite, wolframite, topaz, fluorite, apatite, tourmaline, quartz, grossularā€“andradite, diopside, vesuvianite and tremolite."
Show threadRealGravitas -Citizen SaboteurNov 16, 2023
@yoguiignacio Well said! And indeed the Baja Scheelites are uniformly associated with skarns. Both skarns and pegmatites are extensively present in Baja Norte. The mountains running south along the spine of Baja are an extension of the Peninsular Ranges of southern California, and their petrology is identical.
There is a vast treasure of minerals in Baja; its exploitation limited by things like lack of water.