scholarly journals Geomechanical analysis of location and conditions for mining-induced tremors in LGOM copper mines

2021 ◽  
Vol 16 (3) ◽  
Author(s):  
Jerzy Cieślik ◽  
Zbigniew Burtan ◽  
Dariusz Chlebowski ◽  
Andrzej Zorychta
2017 ◽  
Vol 16 (3) ◽  
pp. 94-103 ◽  
Author(s):  
Jerzy Cieślik ◽  
Zbigniew Burtan ◽  
Dariusz Chlebowski ◽  
Andrzej Zorychta

2016 ◽  
Author(s):  
James P. Evans ◽  
◽  
James A. Kessler ◽  
Xiewei Chen ◽  
Kelly K. Bradbury ◽  
...  

Radiocarbon ◽  
2021 ◽  
pp. 1-19
Author(s):  
David P Pompeani ◽  
Byron A Steinman ◽  
Mark B Abbott ◽  
Katherine M Pompeani ◽  
William Reardon ◽  
...  

ABSTRACT The Old Copper Complex (OCC) refers to the production of heavy copper-tool technology by Archaic Native American societies in the Lake Superior region. To better define the timing of the OCC, we evaluated 53 (eight new and 45 published) radiocarbon (14C) dates associated with copper artifacts and mines. We compared these dates to six lake sediment-based chronologies of copper mining and annealing in the Michigan Copper District. 14C dates grouped by archaeological context show that cremation remains, and wood and cordage embedded in copper artifacts have ages that overlap with the timing of high lead (Pb) concentrations in lake sediment. In contrast, dates in stratigraphic association and from mines are younger than those from embedded and cremation materials, suggesting that the former groups reflect the timing of processes that occurred post-abandonment. The comparatively young dates obtained from copper mines therefore likely reflect abandonment and infill of the mines rather than active use. Excluding three anomalously young samples, the ages of embedded organic material associated with 15 OCC copper artifacts range from 8500 to 3580 cal BP, confirming that the OCC is among the oldest known metalworking societies in the world.


2020 ◽  
pp. 1-22
Author(s):  
Peter Schauer ◽  
Stephen Shennan ◽  
Andrew Bevan ◽  
Sue College ◽  
Kevan Edinborough ◽  
...  

The authors of this article consider the relationship in European prehistory between the procurement of high-quality stones (for axeheads, daggers, and other tools) on the one hand, and the early mining, crafting, and deposition of copper on the other. The data consist of radiocarbon dates for the exploitation of stone quarries, flint mines, and copper mines, and of information regarding the frequency through time of jade axeheads and copper artefacts. By adopting a broad perspective, spanning much of central-western Europe from 5500 to 2000 bc, they identify a general pattern in which the circulation of the first copper artefacts was associated with a decline in specialized stone quarrying. The latter re-emerged in certain regions when copper use decreased, before declining more permanently in the Bell Beaker phase, once copper became more generally available. Regional variations reflect the degrees of connectivity among overlapping copper exchange networks. The patterns revealed are in keeping with previous understandings, refine them through quantification and demonstrate their cyclical nature, with additional reference to likely local demographic trajectories.


1898 ◽  
Vol 30 (11) ◽  
pp. 287-288 ◽  
Author(s):  
Henry H. Lyman

In the 22nd Report of the Entomological Society of Ontario, being that for 1891, there appeared a paper from my pen under the title “Can Insects Survive Freezing?”I have recently come across further records of observations upon this subject, and deem them of sufficient interest to be republished in the Canadian Entomologist.In looking over and interesting book of travels entitled “A Journey from Prince of Wales's Fort in Hudson's Bay to the Northern Ocean, undertaken by order of the Hudson's Bay Company for the discovery of copper mines, a north-west passage, etc., in the years 1769, 1770, 1771 and 1772, by Samuel Hearne,” published in 1796, I came across the following interesting notes on page 397


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