{"id":"drill-results-downhole-length-true-width-cueq-engineering-guide","canonicalSlug":"drill-results-downhole-length-true-width-cueq-engineering-guide","url":"https://wellficent.com/en/news/drill-results-downhole-length-true-width-cueq-engineering-guide","language":"en","title":"Reading drill results: downhole length, true width and copper equivalent","summary":"A source-based engineering guide to interval geometry, nested assays, selective samples and CuEq, with a deterministic hypothetical thickness calculation.","body":["A drilling result needs more than a length and a grade. Identify the hole, depth endpoints, unit, sampling support and whether a width was measured along the hole or estimated perpendicular to the mineralized body. Measured depth, vertical depth and mineralized thickness describe different quantities. Converting between them requires the appropriate survey and geological geometry; an unspecified reference must remain unknown.","NorthWest Copper’s 29 October 2026 Kwanika table reports 73.9 metres downhole in K-26-260 and an estimated true width of 49.4 metres. Orvana’s same-day OroValle table reports 26BX1094 from 99.90 to 104.90 metres, a calculated downhole interval of 5.00 metres, but approximate true width of 4.17 metres. These are source-specific estimates, not interchangeable measurements or universal conversion factors.","Gladiator reports 36.0 metres at 2.63% copper in CPG-176, including 20.0 metres at 3.61%. The included interval is already inside the larger one: adding the lengths to obtain 56.0 metres would double-count part of the sample. Its disclosure says complex skarn geometry prevents a reliable true-width estimate. No angle or missing width should be manufactured.","For the chart, assume a fictional straight 20-metre interval crossing an ideal planar layer. Let α be the angle between the borehole and that plane, not the angle to the ground surface. Perpendicular thickness is t = L × sin(α): 10.00 metres at 30°, 14.14 metres at 45° and 20.00 metres at 90°. Values are rounded to two decimals. This geometric illustration does not estimate any cited deposit; folds, variable geometry and uncertain orientation require a different interpretation.","Grade also needs a basis. NorthWest’s 1.39% CuEq accompanies an actual copper assay of 0.51%; the equivalent combines metals using the issuer’s price and recovery assumptions. It is not a 1.39% copper assay or measured commercial recovery. Amaroq’s separate 62.2% zinc rock-chip result is selective and does not represent the average deposit or mine feed.","The practical reading sequence is identity and date, length definition, assay unit, nested intervals, geometry, then economic assumptions. Exploration assays and illustrative arithmetic do not establish mineable tonnage, reserves or a production forecast. The cited reports were read; this guide is not an independent resource audit, and no confidence interval for the source width estimates was supplied here."],"keyPoints":[],"sections":[],"text":"Reading drill results: downhole length, true width and copper equivalent\n\nA source-based engineering guide to interval geometry, nested assays, selective samples and CuEq, with a deterministic hypothetical thickness calculation.\n\nA drilling result needs more than a length and a grade. Identify the hole, depth endpoints, unit, sampling support and whether a width was measured along the hole or estimated perpendicular to the mineralized body. Measured depth, vertical depth and mineralized thickness describe different quantities. Converting between them requires the appropriate survey and geological geometry; an unspecified reference must remain unknown.\n\nNorthWest Copper’s 29 October 2026 Kwanika table reports 73.9 metres downhole in K-26-260 and an estimated true width of 49.4 metres. Orvana’s same-day OroValle table reports 26BX1094 from 99.90 to 104.90 metres, a calculated downhole interval of 5.00 metres, but approximate true width of 4.17 metres. These are source-specific estimates, not interchangeable measurements or universal conversion factors.\n\nGladiator reports 36.0 metres at 2.63% copper in CPG-176, including 20.0 metres at 3.61%. The included interval is already inside the larger one: adding the lengths to obtain 56.0 metres would double-count part of the sample. Its disclosure says complex skarn geometry prevents a reliable true-width estimate. No angle or missing width should be manufactured.\n\nFor the chart, assume a fictional straight 20-metre interval crossing an ideal planar layer. Let α be the angle between the borehole and that plane, not the angle to the ground surface. Perpendicular thickness is t = L × sin(α): 10.00 metres at 30°, 14.14 metres at 45° and 20.00 metres at 90°. Values are rounded to two decimals. This geometric illustration does not estimate any cited deposit; folds, variable geometry and uncertain orientation require a different interpretation.\n\nGrade also needs a basis. NorthWest’s 1.39% CuEq accompanies an actual copper assay of 0.51%; the equivalent combines metals using the issuer’s price and recovery assumptions. It is not a 1.39% copper assay or measured commercial recovery. Amaroq’s separate 62.2% zinc rock-chip result is selective and does not represent the average deposit or mine feed.\n\nThe practical reading sequence is identity and date, length definition, assay unit, nested intervals, geometry, then economic assumptions. Exploration assays and illustrative arithmetic do not establish mineable tonnage, reserves or a production forecast. The cited reports were read; this guide is not an independent resource audit, and no confidence interval for the source width estimates was supplied here.\n\nTechnical and economic analysis\n\nAnalysis as of: 2026-11-05\n\nEvidence cutoff: 2026-11-05\n\nOutlook horizon: Source definitions and illustrative geometry\n\nIllustrative sensitivity\n\nHypothetical perpendicular thickness for a 20-metre downhole interval\n\nFictional straight 20 m interval through an ideal planar layer: t = 20 × sin(α). α is the angle between borehole and layer plane, not the ground surface. Values rounded to two decimals; not field measurements or estimates of the cited deposits.\n\nThese calculations illustrate stated assumptions; they are not observations or a calibrated forecast.\n\n30° between borehole and layer plane: 10 metres\n\n45° between borehole and layer plane: 14.14 metres\n\n90° between borehole and layer plane: 20 metres","category":"energy","region":"world","topics":["mining","metals"],"eventDate":"2026-11-05","eventDateBasis":"analysis-as-of-date","publishedAt":"2026-11-05T23:43:08Z","modifiedAt":"2026-11-05T23:43:08Z","publicationBasis":"first-publication","preparedAt":"2026-11-05T23:42:58Z","sourcePublishedAt":"2026-10-29","translatedAt":"2026-11-05T23:40:05Z","sources":[{"url":"https://northwestcopper.ca/news/northwest-intersects-73-9-metres-of-1-39-cueq-0-16359/","name":"NorthWest Copper — Kwanika Western Zone results","checkedAt":"2026-11-05","publishedAt":"2026-10-29"},{"url":"https://www.orvana.com/English/news/news-details/2026/ORVANA-REPORTS-H2-FY2026-EXPLORATION-RESULTS-AT-OROVALLE-SPAIN/default.aspx","name":"Orvana Minerals — H2 FY2026 OroValle exploration results","checkedAt":"2026-11-05","publishedAt":"2026-10-29"},{"url":"https://www.nsx.com.au/ftp/news/021745702.PDF","name":"Gladiator Metals — 29 October issuer release filed with NSX","checkedAt":"2026-11-05","publishedAt":"2026-10-29"},{"url":"https://www.mfn.se/one/a/amaroq/maarmorilik-project-development-strategy-and-high-grade-results-from-2026-exploration-programme-d5cf7272","name":"Amaroq — technical disclosure in issuer release distributed by MFN","checkedAt":"2026-11-05","publishedAt":"2026-11-02"}],"translations":{"en":"https://wellficent.com/en/news/drill-results-downhole-length-true-width-cueq-engineering-guide","tr":"https://wellficent.com/tr/news/drill-results-downhole-length-true-width-cueq-engineering-guide","ar":"https://wellficent.com/ar/news/drill-results-downhole-length-true-width-cueq-engineering-guide","fr":"https://wellficent.com/fr/news/drill-results-downhole-length-true-width-cueq-engineering-guide","es":"https://wellficent.com/es/news/drill-results-downhole-length-true-width-cueq-engineering-guide","ru":"https://wellficent.com/ru/news/drill-results-downhole-length-true-width-cueq-engineering-guide","pt":"https://wellficent.com/pt/news/drill-results-downhole-length-true-width-cueq-engineering-guide"},"corrections":[],"locations":[],"type":"analysis","analysis":{"asOf":"2026-11-05","kind":"technical-economic","chart":{"kind":"illustrative","note":{"ar":"فاصل مستقيم خيالي بطول 20 م عبر طبقة مستوية مثالية: t = 20 × sin(α). α زاوية الحفرة مع مستوى الطبقة، لا سطح الأرض. القيم مقربة لمنزلتين؛ ليست قياسات ميدانية أو تقديرات للرواسب المذكورة.","en":"Fictional straight 20 m interval through an ideal planar layer: t = 20 × sin(α). α is the angle between borehole and layer plane, not the ground surface. Values rounded to two decimals; not field measurements or estimates of the cited deposits.","es":"Intervalo recto ficticio de 20 m a través de una capa plana ideal: t = 20 × sin(α). α es el ángulo entre sondeo y plano de la capa, no la superficie. Redondeado a dos decimales; no son mediciones de campo ni estimaciones de los depósitos citados.","fr":"Intervalle rectiligne fictif de 20 m à travers une couche plane idéale : t = 20 × sin(α). α est l’angle entre forage et plan de la couche, non la surface du sol. Arrondi à deux décimales ; ni mesures de terrain, ni estimations des gisements cités.","pt":"Intervalo reto fictício de 20 m através de camada plana ideal: t = 20 × sin(α). α é o ângulo entre furo e plano da camada, não a superfície. Arredondado a duas casas; não são medições de campo ou estimativas dos depósitos citados.","ru":"Вымышленный прямой интервал 20 м через идеальный плоский пласт: t = 20 × sin(α). α — угол между стволом и плоскостью пласта, не земной поверхностью. Округление до двух знаков; не полевые измерения или оценки названных залежей.","tr":"İdeal düzlemsel tabakayı kesen hayali, düz 20 m aralık: t = 20 × sin(α). α, kuyu ile tabaka düzlemi arasındaki açıdır; zemin yüzeyiyle açı değildir. Değerler iki ondalığa yuvarlandı; saha ölçümü veya atıf yapılan yatakların tahmini değildir."},"rows":[{"label":{"ar":"30° بين الحفرة ومستوى الطبقة","en":"30° between borehole and layer plane","es":"30° entre sondeo y plano de la capa","fr":"30° entre forage et plan de la couche","pt":"30° entre furo e plano da camada","ru":"30° между стволом и плоскостью пласта","tr":"Kuyu ile tabaka düzlemi arasında 30°"},"value":10},{"label":{"ar":"45° بين الحفرة ومستوى الطبقة","en":"45° between borehole and layer plane","es":"45° entre sondeo y plano de la capa","fr":"45° entre forage et plan de la couche","pt":"45° entre furo e plano da camada","ru":"45° между стволом и плоскостью пласта","tr":"Kuyu ile tabaka düzlemi arasında 45°"},"value":14.14},{"label":{"ar":"90° بين الحفرة ومستوى الطبقة","en":"90° between borehole and layer plane","es":"90° entre sondeo y plano de la capa","fr":"90° entre forage et plan de la couche","pt":"90° entre furo e plano da camada","ru":"90° между стволом и плоскостью пласта","tr":"Kuyu ile tabaka düzlemi arasında 90°"},"value":20}],"unit":"m","title":{"ar":"السماكة العمودية الافتراضية لفاصل بطول 20 متراً على مسار الحفر","en":"Hypothetical perpendicular thickness for a 20-metre downhole interval","es":"Espesor perpendicular hipotético para un intervalo de sondeo de 20 metros","fr":"Épaisseur perpendiculaire hypothétique pour un intervalle foré de 20 mètres","pt":"Espessura perpendicular hipotética para intervalo de 20 metros no furo","ru":"Условная перпендикулярная мощность при интервале 20 метров по стволу","tr":"20 metrelik hayali kuyu içi aralık için dik kalınlık"},"unitLabel":{"ar":"متر","en":"metres","es":"metros","fr":"mètres","pt":"metros","ru":"метры","tr":"metre"}},"horizon":"Source definitions and illustrative geometry","horizonLabel":{"ar":"تعريفات المصادر وهندسة توضيحية","en":"Source definitions and illustrative geometry","es":"Definiciones de las fuentes y geometría ilustrativa","fr":"Définitions des sources et géométrie illustrative","pt":"Definições das fontes e geometria ilustrativa","ru":"Определения источников и условная геометрия","tr":"Kaynak tanımları ve örnek geometri"},"evidenceCutoff":"2026-11-05"},"classification":{"version":"1","dataKinds":["project-update"],"geographies":[{"role":"economic-scope","countryCode":"CA","subdivisionCode":null},{"role":"economic-scope","countryCode":"ES","subdivisionCode":null},{"role":"economic-scope","countryCode":"GL","subdivisionCode":null}],"evidenceBasis":["reported-observation"],"measurementPeriod":null}}