Drill hole locations like -700W, 200N would indicate the drillhole location is -700 units W (or 700 units E) and 200 units North from some point usually referenced in a map/report. If hazardous waste site characterization is the primary purpose of the drilling, the log should concentrate on providing data for that type of investigation. One is illustrated below. If tags don’t align as they should – there is likely a problem. These sample or samples (depending on length of zone) are sampled by predetermined maximum sample lengths and each individual sample should be homogeneous in content (all quartz vein, all wall rock, all one type/density of mineral). A “full” drilling run should be 3.0m±10%. Geophysical logging of the hole created in the drilling process is sometimes done without the collection of the core. H��W�n�6����O �eDꎼ%viҦ�[^�w��$n)Ɏ����E����]A&gϜ9�}s��eISN Pay particular attention to areas around known ore bodies as these numbers will be used (sometimes) for resource calculations. The frame permits direct visualisation of structures in their original orientation, and allows them to be measured in terms which have geological meaning at the time they are made. One colour for lithology, one for structure, one fore sampling and maybe one for geotechnical – be consistent and if taking pictures – note what the colours mean. .NET Core supports a logging API that works with a variety of built-in and third-party logging providers. The most common drill core used in North America is NQ sized. Usually discrepancies are either driller error or core loss. Someone will set-up foresights or backsights (or both) so the driller can line up the drill rig to. 0 Lest I be thought biased, I must point out that the internal core angles method of measuring planar structure in core does offer some advantages over using a core frame: [1] As alpha angles increase, the ability to measure an accurate beta angle decreases. Even where the method of measuring internal core angles is being used, a core frame must also be available in order to measure planes with high alpha angles[1]. Statistical handling of bulk plots has value in geotechnical studies but tends to obscure geological relationships by promoting quantity over quality. Any core condition, Note changes in colour, hardness and even texture for alteration, as well as any changes in mineralization accompanying it. The alpha angle is the acute angle between CA and the line E-E (the long axis of the intersection ellipse). %PDF-1.5 %���� The frame permits direct visualisation of structures in their original orientation, and allows them to be measured in terms which have geological. Hole Location in the old days was recorded using a local mine grid system which basically used a man made grid actually cut into the minesite (stakes, pins,surveys) and each hole would be referenced from one known point from which they were physically measure out. Extremes on both ends are non-desirable as someone who separates to much will quickly become overwhelmed with backlog. A potential sampling area, usually denoted by a mineralogy and alteration change, is made up of three parts. Put as many core boxes as you can on whatever logging tables you have. This may require gluing together of core fragments in critical areas.

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