vug

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vug

[vəg]
(petrology)
A small cavity in a vein or rock usually lined with minerals differing in composition from those of the enclosing rock. Also known as bughole.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

vug

A pit-like natural cavity in stone, usually between a small fraction of an inch and a few inches in diameter; may be lined with crystals or layers of mineral materials; most common in dolomite, limestone, and marble.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
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One hole drilled in 2015 at Markov Kamen intersected hydrothermal breccia, massive sulphides and vuggy silica, suggesting high-sulphidation type epithermal mineralisation controlled by northwest structures.
Most of the experimental study of water/oil flow mechanisms for vuggy porous media are based on two-dimensional vuggy fractured porous cell with very low pressure and temperature (Cruz et al., 1998; Cruz et al., 2001; Kang et al., 2006) while the depth of District IV of Tahe Oilfield is over 5300m,the pressure is over 50MPa and the temperature is over 125 Celsius degree.
Skolithos burrows from the Hoover Quarry frequently occur in conjunction with desiccation cracks, and burrow infills commonly show a vuggy texture with large voids preserved, the latter is an indication that the burrows were constructed in a subaerial environment where sediments were sufficiently cohesive that burrow collapse did not occur.
"A very attractive aspect of this project is that there are many untested targets with a combination of either multiple high-grade gold assays, strong satellite anomalies, and/or areas with 'vuggy silica' that have yet to be properly tested.
For example, although the Peebles Dolomite is poorly bedded and does contain < 1m thick breccia layers, it is unlike the breccia in that it has a characteristically vuggy texture, contains numerous macrofossils, and contains abundant asphalt (Swinford 1985, Baranoski and others 2003).
Grab samples of vuggy quartz with massive arsenopyrite from the Maybe Mountain stock assayed up to 6.07 grams of gold per tonne and soil samples contained anomalous silver, arsenic, copper, lead, and antimony over a 250 meter by 500 meter area.
They contain vuggy pores, defined as pores that are connected only through interparticle porosity (Lucia, 1999).
At the Caldera Project, the company has conducted mapping, rock, soil and stream sediment sampling and test IP geophysics to confirm presence of acid-sulphate alteration, including zones of massive to vuggy silica, quartz-alunite and kaolinite over a 16sqkm area.
In its lower 3 m, the Eel Bed contains 1-3 cm structureless and vuggy beds intercalated with thinly-laminated (1-5 mm) layers of algal mats, anhydrite and dolomite.
LEHR, Homogenization of a Darcy-Stokes system modeling vuggy porous media, Comput.