models discussed in the passage in which of the
following ways?
(A) It may furnish a valid account of ore-forming
processes, and, hence, can support conceptual
models that have great practical significance.
(B) It suggests that certain geological formations, long
believed to be mineralized, are in fact
mineralized, thus confirming current conceptual
models.
(C) It suggests that there may not be enough similarity
across Archean-age gold-quartz vein systems to
warrant the formulation of conceptual models.
(D) It corrects existing theories about the chemical
halos of gold deposits, and thus provides a
basis for correcting current conceptual models.
(E) It suggests that simple prospecting methods
still have a higher success rate in the discovery
of gold deposits than do more modern methods.
7. According to the passage, methods of exploring for gold
that are widely used today are based on which of the
following facts?
(A) Most of the Earth’s remaining gold deposits are still
molten.
(B) Most of the Earth’s remaining gold deposits are
exposed at the surface.
(C) Most of the Earth’s remaining gold deposits are
buried and have no surface expression.
(D) Only one type of gold deposit warrants exploration,
since the other types of gold deposits are found in
regions difficult to reach.
(E) Only one type of gold deposit warrants exploration,
since the other types of gold deposits are unlikely to
yield concentrated quantities of gold.