| | | how close to the surface is the albany graphite mine in ontario and how deep does the deposit reach
ChatGPT said:
Here’s what I found on the Albany Graphite Project in northeastern Ontario (near the communities of Constance Lake First Nation and Hearst):
How close to the surface the deposit is - The deposit is described as “near surface, underneath glacial till overburden and a thin veneer of Paleozoic sedimentary cover-rocks.” Zentek Ltd.+2Zentek Ltd.+2
- Specifically the overburden of glacial till is on average ~ 44 m thick, and the Paleozoic cover rocks average ~ 3.8 m in thickness. BC Government CMS Content+2Geology Ontario+2
- Another statement indicates: “the deposit has an average 45 m of overburden made up of glacial till … and a thin veneer of Paleozoic sedimentary cover-rocks.” Zentek Ltd.+1
- Also, a drill result noted near surface mineralization: drill hole #3 “upon passing through the overburden/limestone, the hole immediately intersected graphitic breccia …” indicating the graphite body is relatively shallow beneath cover. Zentek Ltd.
? Conclusion: The mineralized pipes begin just beneath the overburden and cover rocks, so you’re talking tens of metres from surface (roughly ~30-50 m to bedrock + cover) before hitting mineralization.
How deep the deposit reaches - The deposit consists of two adjacent “pipes” or breccia-systems, spaced ~250 m apart. NationTalk+1
- The East Pipe is about 600 m deep. NationTalk
- The West Pipe is about 500 m deep in one estimate. NationTalk+1
- The Ontario Mineral Inventory summary states for the West Pipe: modelled to a depth of approximately 525 m below surface. Geology Ontario
- Also: both pipes are cut by “barren sills” (10-60 m thick) located approximately 200-300 m below topographic surface. Newswire+1
- A 2015 article states the deposit (both pipes) is well exposed at surface and “continues at depth within the non-weathered sheared gneiss”. Sama Resources
? Conclusion: The deposit has been drilled to depths of ~500-600 m, and mineralization remains open at depth beyond that in places. The main mineralized pipes are modelled to about that depth.
Summary - The mineralization lies quite close to surface, beneath only a moderate cover of glacial till (~30-50 m) and thin sedimentary rocks.
- The deposit extends to substantial depth, roughly 500-600 m below surface in the main pipes, with potential to go deeper.
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