The influence of vegetation cover on evapotranspiration atop waste rock piles, Elk Valley, British Columbia

2019 ◽  
Vol 33 (20) ◽  
pp. 2594-2606 ◽  
Author(s):  
Erin M. Nicholls ◽  
Gordon B. Drewitt ◽  
Stephanie Fraser ◽  
Sean K. Carey
Keyword(s):  
British Columbia ◽  
Vegetation Cover ◽  
Waste Rock ◽  
Waste Rock Piles

Late Pleistocene age, size, and paleoenvironment of a caribou antler from Haida Gwaii, British Columbia

2019 ◽  
Vol 56 (6) ◽  
pp. 688-692 ◽  
Author(s):  
Rolf W. Mathewes ◽  
Michael Richards ◽  
Thomas E. Reimchen
Keyword(s):  
British Columbia ◽  
Late Pleistocene ◽  
Vegetation Cover ◽  
Coniferous Forest ◽  
Bone Collagen ◽  
Haida Gwaii ◽  
Terrestrial Vertebrates ◽  
Mis 3 ◽  
Basal Portion ◽  
Marine Isotope Stage 3

The basal portion of a fossil caribou antler from Graham Island is the only evidence of large terrestrial vertebrates older than the Fraser (late-Wisconsin) glaciation on Haida Gwaii. This antler has been radiocarbon dated three times by different laboratories and all ages fall within the mid-Wisconsin Olympia Interglaciation (Marine Isotope Stage 3, MIS 3). We suggest that the latest date, using ultrafiltration of bone collagen, is closest to the true age at 43 200 ± 650 years BP (48 200 – 45 200 cal BP). Previous paleoecological analysis from Graham Island reconstructed a vegetation cover during MIS 3 consisting of mixed coniferous forest with nonforested openings, similar to cool subalpine forests of today. These conditions are consistent with environments that support woodland caribou and the related extinct Dawson caribou. Morphometric comparison of antlers from woodland and Dawson caribou suggest that they are more similar than previously interpreted and raise questions about the inferred differences between the mainland and island subspecies.

Nitrate release from waste rock dumps in the Elk Valley, British Columbia, Canada

2017 ◽  
Vol 605-606 ◽  
pp. 915-928 ◽  
Author(s):  
Fazilatun N. Mahmood ◽  
S. Lee Barbour ◽  
C. Kennedy ◽  
M. Jim Hendry
Keyword(s):  
British Columbia ◽  
Waste Rock

NUMERICAL SIMULATIONS OF LONG TERM UNSATURATED FLOW AND ACID MINE DRAINAGE AT WASTE ROCK PILES

2006 ◽  
Vol 2006 (2) ◽  
pp. 582-597 ◽  
Author(s):  
Omar Fala ◽  
John Molson ◽  
Michel Aubertin ◽  
Bruno Bussière ◽  
Robert P. Chapuis
Keyword(s):  
Acid Mine Drainage ◽  
Numerical Simulations ◽  
Unsaturated Flow ◽  
Mine Drainage ◽  
Waste Rock ◽  
Acid Mine ◽  
Waste Rock Piles

Remedial Action for Radioactive Waste Rock Piles in China

2000 ◽  
Vol 663 ◽  
Author(s):  
Chen Zhangru ◽  
Jin Yuanxin ◽  
Song Lanying ◽  
Wu Qingyan
Keyword(s):  
Radioactive Waste ◽  
Gamma Ray ◽  
Waste Rock ◽  
Chinese Government ◽  
Uranium Deposits ◽  
Remedial Action ◽  
Waste Rocks ◽  
Remedial Actions ◽  
Waste Rock Piles ◽  
The Individual

ABSTRACTThe Chinese government has conducted remedial action for radioactive waste rock piles since 1990. The radioactive waste rocks produced in the course of geological exploration of uranium deposits are widely distributed over several hundreds of locations in more than 20 provinces in China.The following remedial actions for radioactive waste rock piles have been undertaken in China:1. Protecting dams for stabilizing the piles have been built. A total length of about 50,000 m of these dams has been completed.2. Soil layers have been emplaced on the radioactive waste rock piles. The focus of the action is to eliminate the radiation harmful to public health. A total area of 750,000 square meters of soil ahs been placed on the piles in China.3. Radioactive waste rock piles have been vegetated. Aesthetic shaping of the landscape in the exploratory district of the uranium deposits is our expectant goal. A total area of about 560,000 square meters of vegetation has been placed on the soil covering the piles.Through these remedial actions, the environmental situation has been extensively improved in the remedial districts. The individual annual effective dose equivalent is less than 1 Sv/a. The radon emission rate is less than 20 pCi/m2.s. The gamma ray external exposure rate has been greatly reduced.

Multiphase transfer processes in waste rock piles producing acid mine drainage

2001 ◽  
Vol 52 (1-4) ◽  
pp. 165-186 ◽  
Author(s):  
René Lefebvre ◽  
Daryl Hockley ◽  
Jason Smolensky ◽  
Ann Lamontagne
Keyword(s):  
Acid Mine Drainage ◽  
Mine Drainage ◽  
Waste Rock ◽  
Transfer Processes ◽  
Acid Mine ◽  
Waste Rock Piles
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