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China
Springs, Elko County, Nevada
On August 29, 2001, there was a large failure on the south
wall of Barrick Goldstrike Mines' Betze-Post open pit (40°55'N
116°21'W). The
Betze-Post Mine is the largest gold mine in the United States and the third
largest in the world. The mine is
located in the Tuscarora Mountains, north of Carlin, Nevada in Eureka County.
At the time it was suspected that this failure was initiated by a small
earthquake that occurred the morning of August 27, 2001. This earthquake
was relatively small 3.4 (richter scale). Most earthquakes don't create
damage until about 4.0. The quake occurred (epicenter)
about 21 miles north of the Betze-Post pit. This location is in the same
mountain range (Tuscarora) just east of Willow
Creek Reservoir, at 41.19N 116.43W, (41°11'24"N 116°25'48"W)
at a depth of 6.8km (4.22 miles down). Below is a photo of
the wall failure shown in the local newspaper (Elko Daily Free Press).
The purpose of this page is to show the location of the epicenter, at China Camp,
just south of China Springs. The question comes to mind of how accurate
is the calculated epicenter location compared to the actual location? I
don't know. Is it exactly at this spot or just in the area? The
next question is: did the earthquake actually cause the failure? Was it
the 'straw that broke the camel's back'? I don't know that either, but I
suspect it may be so. Other questions that come to mind are, how did
China Springs and the adjacent China Camp get their names? Did the Chinese
released from the railroad in 1869, camp here when the Tuscarora mining boom was
on? Also, just as a note, around the spring there are many Indian-made
flint chips. Ok, I have diverged enough, here we go ...
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ELKO DAILY FREE PRESS. Elko, Nevada Wednesday,
September 5, 2001 Page A8
"The slide at Barrick Goldstrike Mines Inc.'s
Betze-Post open pit is on the south wall, and the portals to Newmont
Mining Corp.'s Deep Post Mine can be seen over to the right." |
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USGS
Topographic Map of China Spring
USGS
Topographic Map of Betze-Post Pit
USGS
Topographic Map of Tuscarora Mountains
USGS
Aerial Photograph of Tuscarora Mountians
Click on photos to see original high clarity digital
photographs
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| Location of epicenter (looking south) |
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| right of above photo |
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| left of first photo |
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| Earth Cracks. I don't know if they are related
to this quake or not but they are near the calculated epicenter
trending in a north-south direction. In the first picture above
titled "Location of epicenter" the earth cracks are in the
lower center of the photo (before and perpendicular to the creek bed
that travels across, E-W, the photo). These cracks trend
north-south and follow the center of the central creek bed that
trends toward the skyline. Cracks are several inches wide and more
than a foot deep (eyeglasses are for scale). They extend at
least 100 feet in a north - south direction (extent not determined). |
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| Rock feature just west and parallel to earth
cracks. Earth cracks are just right of this photograph. |
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At quartzite outcrop near epicenter was this
'killing field'. I would assume it is a hawk, or other bird of
prey, dining room. |
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Map
of Nevada Earthquake Locations
Data on Subject Earthquake
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Links
One 'earth-shaking' site


Top
Gold Mines in 2000
By Paul Burton, editor
World Gold
| Goldstrike Property
Nevada
With the benefit of the new roaster facility, the Goldstrike Property
produced 590,492 ounces of gold during the second quarter, an increase
of 12 percent over the same period last year. The Property accounted for
62 percent of total Company production. Total cash costs were $195 per
ounce compared to $179 the previous year. Year-to-date production
totaled 1,203,970, 17 percent higher than the previous year at total
cash costs of $185 per ounce.
The Goldstrike Property is expected to produce 2.3 million ounces of
gold in 2001, marginally lower than the record 2.4 million ounces in
2000. Total cash costs are expected to average $195 per ounce for the
year, higher than the first half as processed grades decline at Betze-Post
in the second half of the year. Overall, the higher costs for the
Property reflect higher power costs and lower processing grades in 2001
at Meikle and in the second half of the year at Betze-Post. Through
productivity improvements the Property expects to be able to offset an
unbudgeted second power cost increase totaling $10 million that took
effect March 1, 2001. The higher power costs in the western United
States are expected to persist for at least the next two years,
resulting in marginally higher costs at the Property.
Betze-Post Mine
The Betze-Post Mine produced 403,688 ounces of gold in the second
quarter, 23 percent more than in the same period last year. The increase
reflects both the additional processing capacity provided by the roaster
and the continuation of mining in the high-grade 7th West Layback.
Year-to-date the Mine produced 855,334 ounces of gold, 30 percent higher
than last year.
Total cash costs were $213 per ounce, compared to $215 for the second
quarter of 2000. Unit mining costs declined by 11 percent year-to-date,
compared to last year while tons mined increased by 18 percent. These
results are attributable to the addition of six 330-ton haul trucks in
mid-January and to modifications to the mine sequencing, which shortened
the cycle times for hauling waste rock from the 8th West Layback.
Because of the new roaster, the Mine also benefited from lower
processing costs.
The high ore grades mined in the first half are expected to decline
towards reserve grade going forward. The Mine is on track to meet its
production target of 1.6 million ounces of gold in 2001, at a total cash
cost of $218 per ounce, which is in line with plan despite the second
power cost increase.
Meikle Mine
The Meikle Mine produced 186,804 ounces of gold during the second
quarter, 11,000 ounces higher than plan due to the earlier than
anticipated access to Rodeo and Griffin development ore. During the same
period of 2000, the Mine produced 198,638 ounces of gold. Total cash
costs were $156 per ounce in the second quarter, compared to $117 per
ounce in the same quarter of 2000. The higher costs relate to mining in
lower grade areas of the Mine, as well as to mining more low-grade
development ore than planned.
Tons mined in the second quarter were 24 percent higher than plan,
due to an increase of 126,000 tons in development ore from Griffin and
to the earlier than expected access to Rodeo development ore. At the end
of the second quarter, 51,000 tons of ore had been stockpiled for
processing later in the year. The ore was stockpiled because of
scheduled maintenance at the autoclaves and roasters in the first
quarter.
The mining rate is now benefiting from the intensive training program
instituted in 2000 to counter the underground labor shortage. Employment
is now at planned levels and development productivity is the highest in
the Mine's history.
Production for 2001 is expected to be marginally higher than plan at
685,000 ounces with the mining of more development ore than planned.
Total cash costs are expected to be $143 per ounce, $6 more than plan,
because of the higher ground support costs associated with the mining of
development ore.
Rodeo is on budget and on schedule for production start-up in the
fourth quarter. It is expected to contribute about 70,000 ounces to the
Mine's total 2001 production, primarily in the fourth quarter. The
exploration drift to Banshee has been deferred until the current
exploration program better defines the zone of mineralization.
Exploration also continues to focus on the deep potential of Main Meikle
and on the Barrel area (west of Rodeo).
Goldstrike Process Division
The autoclaves processed 1,362,413 tons of ore in the second quarter,
compared with 1,411,612 tons in 2000. The lower throughput was due to
scheduled maintenance during the quarter. Two more autoclaves are
scheduled to undergo routine maintenance, one in the third quarter and
the other in the fourth. Overall, unit autoclave processing costs were
lower than plan and recovery rates higher than plan. This reflects
higher tonnage from Meikle and the fact that less transitional ore was
processed than planned. Transitional ore requires more grinding time,
and therefore lowers throughput and increases costs. The higher tonnage
from Meikle was due to the reclassification of high-grade material
originally scheduled for the roaster. This material was routed to the
autoclaves to improve the recovery rate.
Construction is nearly complete on a new ball mill to increase the
grinding capacity and throughput of the autoclave facility. It is
scheduled for completion in the third quarter, at a cost of $7 million.
As of the fourth quarter, it will provide an additional 1,600 tons per
day of processing capacity, primarily benefiting Betze-Post.
Roasters
The roasters processed a total of 1,198,094 tons of carbonaceous ore
during the second quarter, averaging 13,300 tons per day compared to
878,934 tons during the corresponding period of 2000 when the facilities
were commissioned. The throughput rate for the first six months was 6
percent lower than the expected full year average of 12,700 tons per
day, due to the voluntary five-day closure of the facility under the
state of Nevada's voluntary power curtailment program. Unit roaster
costs for the second quarter were marginally higher than the 2001 plan
and higher than 2000, due to the increase in power costs. Recovery rates
were lower than plan, due to the routing of high-grade Meikle ore to the
autoclaves instead of to the roaster. The decision to reroute this ore
reflects continuing work by the process division to optimize throughput,
recovery rates and unit costs by rationalizing the use of the two
processing facilities. |
Wednesday,
September 05, 2001
NEWMONT
MINING CORP
Newmont has reported the reopening of the Deep Post underground mine in
Nevada following inspections by the federal Mine Safety and Health
Administration and the Nevada State Mine Inspector's office. The mine
was closed as a safety precaution following a slope movement on the
south wall of the Betze-Post pit on August 29. There were no injuries
and no damage to the underground mine workings and facilities at Deep
Post.
Property: GOLDSTRIKE
(BETZE-POST)
(Complete Text of Sep 5, 2001 News
Release) PDF
Thursday,
August 30, 2001
BARRICK
GOLD CORP and NEWMONT
MINING CORP
Newmont has temporarily halted operations at its Betze-Post mine in
Nevada after a slope wall of the open pit collapsed. The collapse
occurred on the south wall of the pit, blocking an access road to the
underground portal, but did not affect the underground mine structure.
The company reported that there were no injuries, and the impact on
production was still unknown. The underground mine will remain closed
until federal and state investigators have completed their
investigation. Open pit operations at the mine were not affected, and
will remain active during the investigation. The underground operations,
which produce 160,000 ounces per year, are operated by Newmont, while
the open pit operations are operated by Barrick, producing an additional
1.5 million ounces per year.
Property: GOLDSTRIKE
(BETZE-POST)
(Complete Text of Aug 30, 2001 News
Release) PDF |

Robert
M. Smith
1932 - 1998

The Betze-Post Mine, owned by Barrick Gold, is the largest
in the US and the third largest in the world
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City
of Elko Recognizes Four Local Mines
Elko, NV - January 13, 1999
Barrick Goldstrike Mines, the youngest mine of the four represented,
was purchased on December 31, 1986 from Western States Minerals for $62
million, which was considered too high of a price to pay at that time.
Today, Barrick is comprised of two world class mines: the Betze-Post
surface mine and the Meikle underground mine. Barrick has 1,760
employees and is currently constructing a $330 million Roaster Project,
which is scheduled to be completed by the middle of the year 2000. It
will employ 145 workers. Barrick Goldstrike Mines produces 20% of the
nation’s gold. |

Geoprime
Minerals & Earth Materials Company
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Nevada ranks among the most seismically active States. |
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Additional Information: Northeastern
Nevada Museum
© 2001 - Elko Rose Garden Association
Recent Photos by Dan Turner
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