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 ?
This brief outline of a diatreme formation clearly shows which path the eventual geophysical prospection should take.
The Kelsey Lake kimberlites, a cluster of eight diamondiferous pipes, form a group of irregular shaped pipes and fissures consisting largely of multiphase blows of diatreme facies kimberlite, with extensions and minor phases of hypabyssal-facies kimberlite.
Seismic profiling of the Blue Island diatreme target has commenced to identify targets for further drilling this winter.
Diatreme Resources Limited (ASX:DRX) has lodged a mining application for a 1,560 hectare area over the Cyclone heavy mineral project.
Heavy line indicates boundary of Cripple Creek diatreme breccia, not boundary of gold-bearing rock.
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.
The diatreme formed between 33 and 28 million years ago (Kelley et al.
Aultra's subsequent plans include drilling of a large gold and silver mineralized volcanic diatreme complex on the property, and alternate gold recovery methods which could be used during production.
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 "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).
In the area of the Capillitas deposit, volcanic rocks (rhyolite, porphyritic dacite, and rhyolitic and granitic breccias) form an elliptical, 900 x 1500-meter diatreme surrounded by a granitemonzonite belonging to the Capillitas batholith.