Assertion: gold | /r/AtLocation | association
Facets:
value: with copper and lead deposits
type: OTHER
value: in the gravel of stream beds
type: LOCATION
value: often
type: TEMPORAL
value: with pyrites
type: OTHER
value: in quartz veins
type: LOCATION
Source sentences:
text: Because of its poor chemical reactivity, gold is found uncombined but it occurs in association with ores of copper , nickel, silver,etc, in quartz veins, in the gravel of stream beds, and with pyrites (iron sulfide).
text: Gold often occurs in association with copper and lead deposits, and, though the quantity present is often extremely small, it is readily recovered as a by-product in the refining of those base metals.