Monday, December 30, 2019

Mponeng - World's deepest Gold Mine

Mponeng is a gold mine in South Africa's North West Province, about 65 km southwest of Johannesburg, owned by AngloGold Ashanti. Mponeng means 'look at me' in the local Sotho language. Formerly the Western Deep Levels South Shaft, or Shaft No 1, Mponeng is the most recently sunk of the three former Western Deep Levels mines.

The global record was broken in 2009 after digging 3,777m. With the current sink, the mine would go down to 4,100m. Plans could take the Mponeng Mine to 4,500m below the surface.

The mine was originally built by the Anglo American Corporation with its 2 km (1.2 mi) deep main shaft being sunk in 1957.
The Mponeng Mine is also one of the world's richest with grades at over 8g/t. Production is primarily sourced from the Ventersdorp Contact Reef, a seam of ore that averages only 30 inches wide. Work is progressing to extract the ore from the Carbon Leader Reef below it.
In an effect known as the geothermal gradient, the temperature of the earth increases with depth. Rock temperature reaches 140 degrees Fahrenheit and humidity 95 percent.

6,000 tons of ice a day keeps Mponeng's deepest levels at 83 degrees. Ice is made in a surface plant, then mixed with salt to create a slush that is pumped to underground reservoirs. There, giant fans pass air over the coolant and push the chilled air further down into the mining tunnels.
Every day the 4000 miners at the Mponeng Mine detonate 5,000 pounds of explosives. Every day they take away 6,400 tons of rock.

The laws of compressive force dictate that the rock will try to close the spaces left by mining.
Six hundred times a month a "seismic event" will shudder through the Mponeng mine. Sometimes the quakes cause rockbursts, when rock explodes into a mining cavity and mows men down with a deadly spray of jagged rock.

Sometimes a tremor causes a "fall of ground"—the term for a collapse. Some of the rockbursts had been so powerful that other countries, detecting the seismic signature, had suspected South Africa of testing a nuclear bomb.

Wednesday, December 25, 2019

Athabasca Minerals Inc. - AMI.v

Athabasca Minerals Inc. - AMI.v is an integrated group of aggregates companies involved in resource development, aggregates marketing and midstream supply-logistics solutions.


On Feb 11, 2020 the company released News

Athabasca Minerals Inc. is pleased to announce that AMI Silica Inc., a wholly-owned subsidiary of AMI, has secured an anchor offtake agreement with Shell Canada Energy for its Duvernay Frac Sand Project.






Wednesday, December 11, 2019

Westhaven Ventures Inc. - WHN.v

Westhaven Ventures Inc. - WHN.v is advancing the 15,542 ha Shovelnose property, located near the southern end of the Spences Bridge Gold Belt (SBGB), approximately 30 km south of Merritt, British Columbia.




On March 18, 2019 the company released NEWS

Westhaven Drills 12.66 Metres of 39.31 g/t Gold and 133.11 g/t Silver at Shovelnose

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On December 19, 2018 the company released NEWS

Westhaven Ventures Inc. has provided an update on its recently completed drill program at its 15,542-hectare Shovelnose gold property, located within the prospective Spences Bridge gold belt (SBGB), which borders the Coquihalla Highway, 30 kilometres south of Merritt, B.C.

Westhaven has completed another 2,183 metres (m) of diamond drilling in 5 holes. Due to a scheduled holiday break, pending assays will be released in early 2019 when received.
Epithermal vein mineralization has been intersected in all drill holes.
Multiple occurrences of visible gold have been encountered in holes SN18-18 and SN18-21.
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On October 31, 2018 the company released NEWS

Westhaven Drills 46.20 Metres of 8.95 g/t Gold and 65.47 g/t Silver at Shovelnose

Drill hole SN18-15 returned 46.20 metres of 8.95 grams per tonne gold and 65.47 grams per tonne silver, including 5.00 metres of 14.70 grams per tonne gold and 215.00 grams per tonne silver. SN18-15 is 100 metres southeast of hole SN18-14, which returned 17.77 metres of 24.50 grams per tonne gold and 107.92 grams per tonne silver. The strike length of the South zone is 700 metres and is open to the east and southeast. A fully financed drill program is expected to commence in early November.