diatreme


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diatreme

[′dī·ə‚trēm]
(geology)
A circular volcanic vent produced by the explosive energy of gas-charged magmas.
References in periodicals archive ?
It is directly associated with the North Stock diatreme and diatreme contact, has a strong sub-vertical resistivity gradient and is related to phonolite and feldspar porphyry intrusive bodies.
This brief outline of a diatreme formation clearly shows which path the eventual geophysical prospection should take.
The KL-1 pipe consists of multiple phases of diatreme facies and possible crater facies kimberlite.
Diatreme has an experienced Board and management, with expertise across all stages of project exploration, development and financing, with a vast network of contacts across China and Asia.
This feature is interpreted as a diatreme breccia and it has evidence of argillic alteration on its periphery.
Diatreme Resources Limited (ASX:DRX) has lodged a mining application for a 1,560 hectare area over the Cyclone heavy mineral project.
The orebody is centered in an 800- x 1,000-ft diatreme, where significant gold-silver mineralization extends to a 1,000-ft depth.
These mineralized intercepts occur in zones of potassic altered diatreme breccias.
Heavy line indicates boundary of Cripple Creek diatreme breccia, not boundary of gold-bearing rock.
Diatreme Resources Limited (ASX:DRX) said today that a delegation from China's BaoTi Group Limited completed a successful site visit to Diatreme' Cyclone Heavy Mineral Project in late March.
The Cripple Creek mining district occupies a composite Oligocene volcanic-sedimentary subsidence crater (diatreme) associated with subsilicic alkaline rocks.
The "Crater of Diamonds" at Murfreesboro, Arkansas remains a popular site for tourist diggers in loose "dry ground"; diamonds were first found there in 1906, above what was first called a kimberlite, but is now known to be a lamproite diatreme (Kidwell, 1990).