B Type Veins in Porphyry Copper Systems

B Type veins are a unique indicator of the magmatic hydrothermal transition environment where porphyry type copper, gold and molybdenum deposit form. Learning to identify them is a really useful tool in the kit for mineral exploration geologists.
They were first identified by Gustafson and Hunt in the El Salvador porphyry copper deposit in Chile:
Gustafson, L.B., and Hunt, J.P., 1975, The porphyry copper deposit at El
Salvador, Chile: Economic Geology, v. 73, p. 600–607.

The full Fieldcraft video series is here:
https://geologyupskill.thinkific.com/...

Many thanks to Dr. Gregg Morrison, Manuel Hernández and the following blog for specimens that appear in this video.
https://4.bp.blogspot.com/-LRQkaWLpzv...

Index:
0:00 Found a B Vein!
0:35 What are B veins
1:17 What they look like
1:53 Why I'm excited!