THE GEOLOGY OF CINNABAR
DEPOSITS OF CENTRAL PALAWAN
Henry E. Fernandez
ABSTRACT
Cinnabar mineralization in Central
Palawan occurs in varied environment and
lithologic units. They are essentially
fissure fillings and replacements which
are disposed along two regional belts
trending northwest and northeast. The
former belt is chiefly the eastern sole
of the folded Beaufort thrust, while the
latter belt is made up of fault systems
sympathetic to the northeasterly
structural grain of the islands.
From field and laboratory data, it is
concluded that cinnabar deposits were
regionally localized along Beaufort
thrust and were particularly generated
by Recent tectonism related to the
isostatic rebound and platform
stabilization and brought to the surface
along structural lines in both vapor
phase and aqueous solution. Tectonism
and mineralization came in pit-a-pat.
It is further concluded that lateral
extension (especially in soil) of the
mercury ores in Central Palawan has more
potential than deep vertical probing.
Geological
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