background image
8
UNCP Today
Fall 2011
University News
E
arthquake, a goldrush, fracking and offshore drilling come to the Carolinas.
These are questions for the Department of Geology and Geography, so we
asked the experts:
· Dr. Martin Farley, department chair and a former oil company scientist,
· Nathan Phillippi, a cultural and physical (maps) geographer, and
· Dr. Lee Phillips, a sedimentary petrologist and geochemist, who is also
director of the Pembroke Undergraduate Research and Creativity Center
and the Southeastern N.C. Regional Micro-analytical and Imaging Center.
On the following pages is the answer to one of life's nagging questions ­
"Why study geology?"
EARTHQUAKE!
Question. Tuesday, August 23, 2011. Did you feel it?
Answer. Dr. Phillips: Awesome! I was in Old Main. It's the first earthquake I
have felt, and I lived in California for a couple of years. I had an earth science
class right after it, so we had a lot to talk about. It was a reminder from our
physical universe and why we study it.
Dr. Farley: I did not feel it, unfortunately. I was on the ground. For optimal
effect, the top of a flagpole is the best place to feel an earthquake.
Q. Did colliding plates in the Earth's crust cause it?
A. Phillippi: It occurred in the Central Virginia Seismic Zone. It was not caused
by convergent plate boundaries like West Coast quakes. The Mid-Atlantic Rift
in the middle of the ocean is the nearest site with divergent plates.
Dr. Farley: We are in an active seismic zone. The famous earthquake of 1886
in Charleston, S.C., rang church bells in Chicago. There have been others but
not as big as that.
Q. Why weren't there aftershocks?
A. Dr. Farley: There were three to four aftershocks by Thursday and eight-10
altogether. Most were magnitude two that can only be measured by instruments.
Q. What's the possibility of a really big quake? I'm talking about the end time.
A. Phillippi: No, we're not in danger. Cultural geographers like me study the
phenomenon of people who believe in the end time, but geologists agree we're okay.
GOLD FEVER
Q. I read that a Canadian gold mining company
purchased land in Moore County. With gold near
$2,000 an ounce, should I get my pan and head for
the nearest stream?
A. Dr. Farley: Many people forget that North
America's first gold rush was in North Carolina.
There is still gold here, and with the price of gold
so high, there is renewed interest. In Robeson
County? No. The Lumber River is a black water
river, which by definition starts and ends in the
coastal plains. To get gold in the bottom of your
river, it must have its feet in the Piedmont.
Dr. Phillips: I live in Moore County, and there is
some interest in north Moore. There is some placer
mining going on in streams and stream deposits.
Gold has been found in a geologic feature
called the Carolina Slate Belt, which is a band
of sedimentary and volcanic rock that runs from
Virginia to Georgia and cuts through the middle
of North Carolina. At current prices for gold, they
would be foolish not to look here.
Dr. Farley: There is gold everywhere; it's always
a question of how feasible it is to extract it.
People in this line of work are born optimists. I
don't think gold mining in North Carolina will be
economically feasible even at today's prices. There
are also environmental issues that come with gold
mining especially the use of cyanide in a process
called heap leaching.
RARE EARTH METALS
Q. The Chinese are hoarding something called rare earth
metals, and mining companies are looking elsewhere.
G E O L O G Y
From left: Phillippi, Dr. Farley and Dr. Phillips