Sunday, September 30, 2007
Freeport is reported as looking at reopening or expanding Globe/Miami, Bisbee, Clifton/Morenci and Leadville, Colo. They have been drilling at the Lavender Pit in Bisbee which has been closed since 1974 [right].
Insiders tell me not to believe everything in the article but that the gist of it is correct. I asked if the Ajo mine was on the list to possibly reopen and the laughing response was that it could probably be purchased for a pretty low price. (It's currently a candidate for an expensive reclamation and thus a liability on the books.)
To meet the demand, Freeport is running 7 days on, 7 days off, for workers driving or being bussed from cities around Arizona. The latest word is that the labor shortage is so severe that they will be flying in workers from Las Vegas and Dallas for one week shifts at Morenci.
On another note, Paul Lindberg enthused about the mineral resources still in the ground at the Jerome mine. During his talk at the Ores and Orogenesis talk in Oro Valley on Friday, he told how there were few assays or other analyses during the mine's early exploration and much of the potential was not determined. He estimated only 20% of the ore body has been exposed or excavated. The mine was a major producer of copper, zinc, lead, silver, and gold from 1883 to 1953.
That was evidenced by almost everyone packing technical talks until 5 pm on a Saturday.
Most speakers are expected to contribute a written version of their talks to a proceedings volume due out next year.
[right: crowds during coffee break and in the exhibits area]
[below: Paul Lindberg displays sample of a Proterozoic black smoker following his talk on the massive sulfide deposit at Jerome, AZ]
Thursday, September 27, 2007
Registration is over 850, with attendees from 27 countries. The porphyry copper session on Wednesday afternoon was standing room only.
Bill Dickinson and colleagues at the Icebreaker.
Geologist and murder-mystery author Susan Miller signs books at the AZGS booth.
Audience glued to animated porphyry copper model.
AGS president Ann Pattison staffing the booth.
Tuesday, September 25, 2007
Ores & Orogenesis
Circum-Pacific Tectonics, Geologic Evolution, and Ore Depositsthat kicks off tonight at Tucson's El Conquistador Resort. Some field trips started more than a week ago in Japan, the Yukon, and Mexico. More trips are scheduled after the technical program ends on Saturday, Sept 29. Details are at http://www.agssymposium.org/
The symposium is in honor of William (Bill) Dickinson, professor of geology at University of Arizona and tectonicist extraordinaire.
Attendees are coming from around the world, including many mineral explorationists and academics. I plan on blogging about the symposium, geologic talks, and mining news in the coming days.
Monday, September 24, 2007
According to a story in the Green Valley News, the Pima County Flood Control District commissioned a report by hydrologist Tom Myers that concluded that depending on depth to pre-mine water levels, the pit would lower the regional water table by as much as 1,500 feet, and would intercept about 650 acre feet per year of flow to Davidson Canyon. A number of uncertainties in estimating ground water impacts were also outlined.
Last week, the AZGS' State Mapping Advisory Committee made detailed geologic mapping of the Rosemont area the top priority for Survey mapping for the state-federal Statemap cooperative program. The committee believes the map can be used to provide more realistic geologic controls on aquifer modeling in the area among other uses.
A second report was released by the Marana-based Western Economic Analysis Center. The Rosemont project is projected to create 500 jobs averaging $20-25 per hour, and put $256 million annually into the Pima County economy for the next 19 years.
Overall, the mine would produce 2,950 jobs and $488 million annually in Arizona, and $2.3 billion to the national economy, with $43 billion directly and indirectly.
Pima County officials are reported as saying the loss in tourism and diminishing of the areas appeal would be greater than those benefits.
[right: Rosemont mine proposed plan map, courtesy Augusta Resources]
Friday, September 14, 2007
We certainly could divert all of the state’s scientific research funding of $35 million to closing abandoned mines. No doubt there are many other state programs that someone would be happy to shut down as well. But there may be more responsible and effective solutions for fixing the abandoned mine problem.
The U.S. General Accounting Office in 1996 reported (http://www.gao.gov/archive/1996/rc96030.pdf) that there is no comprehensive inventory of abandoned mines on federal lands, nor private and state lands. They reference a 1991 study that estimated a cost of $11 billion to reclaim existing abandoned mine lands but didn’t lay out the details of how they came to that figure.
Right now, over $1.8 billion sits in the federal government’s Abandoned Mine Lands fund in the Office of Surface Mining (as reported in 7-06, the latest figure posted). Unfortunately, the money is dedicated to reclaiming coal mines, not hard rock mining sites such as predominate in Arizona. Since 1977, the
Another problem is that the coal-producing states fight to make sure the monies are used only for reclaiming abandoned coal properties or go to coal-producing states, and not to hard rock mines or states. Thus, we have a situation like
[above right: OSM map of coal mines eligible for Abandoned Mine Lands funds. Hard rock mines such as are common in Arizona are not eligible]
Opening up the federal abandoned mine lands fund to fixing all types of mines is an obvious solution. However, such an effort will create a political firestorm, as it has when it's been suggested in the past. Coal companies can raise a valid point as to why they should be taxed to pay for problems in another industry. But to the parents of a child that died from falling into an open mine shaft, does it make a difference whether the mine produced coal or gold?
From the OSM website:
The Surface Mining Law provides for the restoration of lands mined and abandoned or left inadequately restored before August 3, 1977. Production fees of 35 cents per ton of surface mined coal, 15 cents per ton of coal mined underground and 10 cents per ton of lignite are collected from coal producers at all active coal mining operations. The fees are deposited in the Abandoned Mine Reclamation Fund, which is used to pay the reclamation costs of abandoned mine land projects. The fund consists of fees, contributions, late payment interest, penalties, administrative charges, and interest earned on investment of the fund's principal. From January 30, 1978, when the first fees were paid, through September 30, 2005, the fund has collected $7,445,240,695.16 and fund appropriations totaled $ 5,748,548,370.03
Monday, September 03, 2007
The State Mine Inspector's office has inventoried over 10,000 abandoned mines in Arizona since 1992 but estimates there may be as many as 100,000 across the state (http://www.asmi.state.az.us/faq.asp).
About 13% of the known mines are considered a significant public safety hazard. Extrapolating, that could mean as many as 13,000 dangerous shafts or pits, most of them unmapped or unknown. Like the one near Chloride where two young girls on ATVs fell in over the weekend, killing one of them.
[right - courtesy State Mine Inspector]
Arizona is lucky if it fences or seals off a dozen abandoned mines a year. The abandoned mine program is small and costs are high to block off the most dangerous locations.
State Mine Inspector Joe Hart, a former state senator, armtwisted the Arizona Legislature into adding $50,000 to his agency's budget this year for abandoned mines. Phelps-Dodge, now Freeport McMoran, contributed a matching $50,000.