Structural setting of the Globe‐Progress and Blackwater gold mines, Reefton goldfield, New Zealand

2000 ◽  
Vol 43 (3) ◽  
pp. 435-445 ◽  
Author(s):  
Mark S. Rattenbury ◽  
Michael Stewart
Keyword(s):  
New Zealand ◽  
Gold Mines ◽  
Structural Setting

scholarly journals Quantification and Prediction of Bulk Gold Fineness at Placer Gold Mines: A New Zealand Example

Minerals ◽  
2017 ◽  
Vol 7 (11) ◽  
pp. 226
Author(s):  
Dave Craw ◽  
Christine McLachlan ◽  
Marianne Negrini ◽  
Noel Becker
Keyword(s):  
New Zealand ◽  
Placer Gold ◽  
Gold Mines ◽  
Bulk Gold

Kilometre-scale structural setting of ore shoots in the Frasers gold deposit, Macraes mine, New Zealand

2017 ◽  
Vol 89 ◽  
pp. 1107-1121 ◽  
Author(s):  
Andrew Allibone ◽  
Philip Jones ◽  
Jonathan Moore ◽  
Dave Craw ◽  
Doug MacKenzie ◽  
...  
Keyword(s):  
New Zealand ◽  
Gold Deposit ◽  
Structural Setting

Mobilisation and attenuation of arsenic around gold mines, east Otago, New Zealand

2000 ◽  
Vol 43 (3) ◽  
pp. 373-383 ◽  
Author(s):  
D. Craw ◽  
D. Chappell ◽  
A. Reay ◽  
D. Walls
Keyword(s):  
New Zealand ◽  
Gold Mines

Structural Setting of Gold Mineralization within the Hyde-Macraes Shear Zone, Southern New Zealand

2018 ◽  
Vol 113 (2) ◽  
pp. 347-375 ◽  
Author(s):  
Andrew Allibone ◽  
Philip Jones ◽  
Hamish Blakemore ◽  
Dave Craw ◽  
Doug MacKenzie ◽  
...  
Keyword(s):  
New Zealand ◽  
Shear Zone ◽  
Gold Mineralization ◽  
Structural Setting

Comparison of arsenic and trace metal contents of discharges from adjacent coal and gold mines, Reefton, New Zealand

2005 ◽  
Vol 56 (7) ◽  
pp. 983 ◽  
Author(s):  
L. Hewlett ◽  
D. Craw ◽  
A. Black
Keyword(s):  
New Zealand ◽  
Trace Metal ◽  
Coal Mine ◽  
Sulfide Oxidation ◽  
Coal Mines ◽  
Mining Area ◽  
Anthropogenic Sources ◽  
Gold Mines ◽  
Hydrated Iron Oxide ◽  
Mine Discharge

Historic gold and coal mines in the same catchment near Reefton, New Zealand allow comparison of environmental effects of the different mines in the same climate and topography. Gold mine discharge waters (neutral pH) deposit hydrated iron oxide (HFO) abundantly at mine entrances, whereas coal mine discharge waters (low pH) precipitate HFO tens to hundreds of metres downstream as pH rises. Waters leaving historic mines have up to 59 mg L−1 dissolved arsenic, and HFO at gold mines has up to 20 wt% arsenic. Coal mine discharge waters have low dissolved arsenic (typically near 0.01 mg L−1) and HFO has <0.2 wt% arsenic. Minor dissolved Cu, Cr, Ni, and Zn are being leached from background host rocks by acid solutions during sulfide oxidation, and attenuated by HFO downstream of both gold and coal mines. A net flux of 30 mg s−1 arsenic is leaving the catchment, and nearly all of this arsenic flux is from the gold mining area, but >90% of that flux is from background sources. The present study demonstrates that elevated trace metal concentrations around mines in a wet climate are principally from non-anthropogenic sources and are readily attenuated by natural processes.

Magellanic Cloud Eclipsing Binaries: Primary Distance Indicators

1999 ◽  
Vol 190 ◽  
pp. 563-566
Author(s):  
J. D. Pritchard ◽  
W. Tobin ◽  
J. V. Clausen ◽  
E. F. Guinan ◽  
E. L. Fitzpatrick ◽  
...  
Keyword(s):  
New Zealand ◽  
Magellanic Cloud ◽  
Eclipsing Binaries ◽  
Fundamental Parameters ◽  
Distance Indicators

Our collaboration involves groups in Denmark, the U.S.A. Spain and of course New Zealand. Combining ground-based and satellite (IUEandHST) observations we aim to determine accurate and precise stellar fundamental parameters for the components of Magellanic Cloud Eclipsing Binaries as well as the distances to these systems and hence the parent galaxies themselves. This poster presents our latest progress.

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