core hole

structural clay tile

structural clay tile units
A hollow masonry building unit composed of burnt clay, shale, fireclay, or mixtures thereof, having parallel cells or cores (or both) within a single tile.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
References in periodicals archive ?
The SD 009 core hole targeted at an area of sulphide mineralisation where reverse circulation drilling has been unable to fully cross the mineralised zone due to difficult ground conditions.
Core hole HSP-C1 was a 783 meter test of a deeper resistivity zone with high chargeability and intersected numerous carbon-rich quartz veined breccias and fuchsite (chrome mica) - listwanite (nickel mica) altered mafic intrusions indicative of a Carlin Gold System (green alteration mineral in photo, (press release dated July 3, 2019).
This exploration drilling program is expected to consist of an initial phase of 9 reverse circulation holes and 1 core hole for a total of approximately 20,000 feet.
According to the company, the rotary hole, which is located 15 meters east of the core hole currently underway, is now at 309 meters, with an expected target dept of 400 meters.
Thread-forming taps cold-form the metal in the core hole into final thread form without cutting.
Third, further evaluation of the Quebrada de la Mina (QDM) prospect, a low grade gold discovery located adjacent to the Altar porphyry deposit and recognized in previously reported 2010 reconnaissance drilling which included a 224 meter drill intercept averaging 0.925 g/t Au in core hole QDM-02.
Core hole 08CBN-008 has intersected 80.8m grading 1.23 g/t Au including 20.11m of 0.90 g/t Au.
Gold Standard Ventures reported Phase 2 results from 18 reverse-circulation drill holes and one core hole at the Dixie Deposit and the Arcturus target on its 100%-owned/controlled Railroad-Pinion Project in Nevada's Carlin Trend.
This drilling programme was extended to include a third core hole to test the Red Cloud vein which has also been completed, added the company.
Diamond core hole with RC pre-collar BCRD100005 testing the south western margin of the Buccaneer Porphyry Deposit returned:
Gold Standard Ventures reported results from one core hole and one reverse-circulation, or RC, hole at the Dark Star deposit on its 100%-owned/controlled Railroad-Pinion Project in Nevada's Carlin Trend.
The firm found 191.5 m of 1.46 g/t gold beginning at a depth of 4.5 m in core hole BC11-226, 40.3 m of 1.21 g/t gold beginning at a depth of 13.2 m in core hole BC11-229 and 24.0 m of 1.65 g/t gold from a depth of 62.5 m in core hole BC11-217.