[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"doc-detail-188389-en":3,"doc-seo-188389-105":31,"detail-sidebar-cat-1-en-105":91},{"code":4,"msg":5,"data":6},0,"success",{"doc_id":7,"user_id":8,"nickname":9,"user_avatar":10,"doc_module":11,"category_id":12,"category_name":13,"doc_title":14,"doc_description":15,"doc_content":16,"file_id":17,"file_url":18,"file_type":19,"file_size":20,"view_count":21,"is_deleted":4,"is_public":11,"is_downloadable":11,"audit_status":11,"page_count":22,"language":23,"language_code":24,"site_id":25,"html_lang":24,"table_of_contents":26,"faqs":27,"seo_title":28,"seo_description":15,"update_tm":29,"read_time":30},188389,549768064778,"Felix Montgomery","https://ap-avatar.wpscdn.com/davatar_6f874abed73319feea01a86fa6f0fab8",1,158,"General","Sampling and Drilling QA/QC Procedures","Detailed procedures cover historical soil and outcrop sampling, diamond drilling logistics, core cutting, and laboratory sample preparation for chemical assay. Sampling grids use 50 m intervals along north-south lines, with defined hole depths and representative subsoil mass collection. Drilling from 2006–2010 uses NQ and HQ wire-line hydraulic diamond rigs, with interval spacing and core recovery monitoring. Recovery exceeds 98%, while QA/QC implements standards, blanks, field duplicates, and laboratory repeats to ensure representivity and minimize bias.","| Criteria | Commentary |\n| --- | --- |\n| Sampling techniques | • Historical soil sampling was completed by Vale, samples were taken at 50m intervals along 200m spaced north-south grid lines.\u003Cbr>• Surface material was first removed, and sample holes were dug to roughly 20cm depth. A 5kg sample was taken from the subsoil. The sample was placed in a plastic sample bag with a sample tag before being sent to the lab.\u003Cbr>• Surface rock chip/soil samples were collected from in situ outcrops and rolled boulders and submitted for chemical analysis.\u003Cbr>• The historical drilling is all diamond drilling. Drill sections are spaced 100m apart and generally thereis 50 to 100m spacing between drill holes on sections.\u003Cbr>• Core was cut and ¼ core sampled and sent to commercial laboratories for physical preparation and chemical assay.\u003Cbr>• Sample length along core varies between 0.3 to 4 .0m, with an average of 1 .48m; sampling was done according to lithological contacts and generally by 1m intervals within the alteration zones and 2m intervals along waste rock.\u003Cbr>• Due to the nature of mineralisation which is sub-vertical, mineralisation is mostly oblique to drill core.\u003Cbr>• At the laboratories, samples were dried (up to 105°C), crushed to 95% less than 4mm, homogenized, split and pulverized to 0. 105mm. A pulverized aliquot was separated for analytical procedure. |\n| Drilling techniques | • Historical drilling was carried out between 2006 to 2010 by multiple drilling companies (Rede and Geosol), using wire-line hydraulic diamond rigs, drilling NQ and HQ core.\u003Cbr>• Vale drilled 173 drill holes for a total of 58,024m of drilling on the project. All drill holes were drilled at 55⁰-60⁰ towards either 180⁰ or 360⁰. |\n| Drill sample recovery | • Diamond Drilling recovery rates were calculated at each drilling run.\u003Cbr>• For all diamond drilling, core recoveries were logged and recorded in the database for all historical diamond holes. Overall recoveries are >98% and there are no core loss issues or significant sample recovery problems.\u003Cbr>• To ensure adequate sample recovery and representivity a Vale geologist or field technician was present during drilling and monitored the sampling process.\u003Cbr>• No relationship between sample recovery and grade has been demonstrated. No bias to material size has been demonstrated. |\n| Logging | • Historical outcrop and soil sample points were registered and logged in the Vale geological mapping point database.\u003Cbr>• All drill holes have been logged geologically and geotechnically by Vale geologists.\u003Cbr>• Logging for drilling is qualitative and quantitative in nature.\u003Cbr>• All historical diamond core was photographed. |\n| Sub-sampling techniques and sample preparation | • Diamond Core (HQ) was cut using a core saw (HQ and NQ), ¼ core was sampled. Sample length along core varies between 0.3 to 4 .0m, with an average of 1.48m; sampling was done according to lithological contacts and generally by 1m intervals within the alteration zones and 2m intervals along the waste rock.\u003Cbr>• There is no non-core sample within the historical drill database.\u003Cbr>• QAQC: Standards (multiple standards are used on a rotating basis) are inserted every 20 samples. Blanks have been inserted every 20 samples. Field duplicates are completed every 30 samples. Additionally, there are laboratory standards and duplicates that have been inserted.\u003Cbr>• Sample sizes are appropriate for the nature of the mineralisation.\u003Cbr>• All geological samples were received and prepared by SGS Geosol or ALS Laboratories as 0.5-5.0kg samples. They were dried at 105°C until the sample was completely dry (6-12hrs), crushed to 90% passing 4mm and reduced to 400g. The samples were pulverised to 95% passing 150µm and split further to 50g aliquots for chemical analysis.\u003Cbr>• During the preparation process grain size control was completed by the laboratories (1 per 20 samples) . |","cbCaimKP702iuTt2","https://ap.wps.com/l/cbCaimKP702iuTt2","pdf",1154599,2,12,"English","en",105,"# Sampling techniques\n## Historical soil, outcrop, and rock chip sampling\n## Sample preparation and representivity\n# Drilling techniques\n## Diamond drilling coverage and drill hole orientation\n# Drill sample recovery\n## Core recovery performance and monitoring\n# Logging and QAQC\n## Geological logging and photographic records\n## Standards, blanks, and duplicates","[{\"question\":\"How were historical soil and surface material samples collected and prepared?\",\"answer\":\"Surface material was removed and sample holes were dug to roughly 20 cm depth, with about 5 kg subsoil collected. Surface rock chip/soil samples were taken from in situ outcrops and rolled boulders, then submitted for chemical analysis after bagging and tagging.\"},{\"question\":\"What drilling method and drill hole spacing were used historically?\",\"answer\":\"All historical drilling was diamond drilling, with drill sections spaced 100 m apart and drill hole spacing generally between 50 and 100 m on each section. Drilling occurred between 2006 and 2010 using wire-line hydraulic diamond rigs (NQ and HQ core).\"},{\"question\":\"What QA/QC controls were applied to ensure sample quality and representivity?\",\"answer\":\"QA/QC included inserting standards every 20 samples, blanks every 20 samples, and field duplicates every 30 samples, plus additional laboratory standards and duplicates. Laboratories also performed grain size control (1 per 20 samples) during preparation.\"}]","Sampling and Drilling QA/QC Procedures | PDF",1788389024,4,{"code":4,"msg":32,"data":33},"ok",{"site_id":25,"language":24,"slug":34,"title":14,"keywords":35,"description":15,"schema_data":36,"social_meta":86,"head_meta":88,"extra_data":90,"updated_unix":29},"sampling-and-drilling-qaqc-procedures","",{"@graph":37,"@context":85},[38,53,68],{"@type":39,"itemListElement":40},"BreadcrumbList",[41,45,48,51],{"item":42,"name":43,"@type":44,"position":11},"https://docshare.wps.com","Home","ListItem",{"item":46,"name":47,"@type":44,"position":21},"https://docshare.wps.com/template/","Template",{"item":49,"name":13,"@type":44,"position":50},"https://docshare.wps.com/template/general/",3,{"item":52,"name":14,"@type":44,"position":30},"https://docshare.wps.com/template/sampling-and-drilling-qaqc-procedures/188389/",{"url":52,"name":14,"@type":54,"author":55,"headline":14,"publisher":57,"fileFormat":60,"inLanguage":24,"description":15,"dateModified":61,"datePublished":62,"encodingFormat":60,"isAccessibleForFree":63,"interactionStatistic":64},"DigitalDocument",{"name":9,"@type":56},"Person",{"url":42,"name":58,"@type":59},"DocShare","Organization","application/pdf","2026-09-04","2026-09-02",true,{"@type":65,"interactionType":66,"userInteractionCount":21},"InteractionCounter",{"@type":67},"ViewAction",{"@type":69,"mainEntity":70},"FAQPage",[71,77,81],{"name":72,"@type":73,"acceptedAnswer":74},"How were historical soil and surface material samples collected and prepared?","Question",{"text":75,"@type":76},"Surface material was removed and sample holes were dug to roughly 20 cm depth, with about 5 kg subsoil collected. Surface rock chip/soil samples were taken from in situ outcrops and rolled boulders, then submitted for chemical analysis after bagging and tagging.","Answer",{"name":78,"@type":73,"acceptedAnswer":79},"What drilling method and drill hole spacing were used historically?",{"text":80,"@type":76},"All historical drilling was diamond drilling, with drill sections spaced 100 m apart and drill hole spacing generally between 50 and 100 m on each section. Drilling occurred between 2006 and 2010 using wire-line hydraulic diamond rigs (NQ and HQ core).",{"name":82,"@type":73,"acceptedAnswer":83},"What QA/QC controls were applied to ensure sample quality and representivity?",{"text":84,"@type":76},"QA/QC included inserting standards every 20 samples, blanks every 20 samples, and field duplicates every 30 samples, plus additional laboratory standards and duplicates. Laboratories also performed grain size control (1 per 20 samples) during preparation.","https://schema.org",{"og:url":52,"og:type":87,"og:title":14,"og:site_name":58,"og:description":15},"article",{"robots":89,"canonical":52},"index,follow",{"doc_id":7,"site_id":25},{"code":4,"msg":5,"data":92},[93,98,102,107,112,117,122,127,132],{"id":94,"doc_module":11,"doc_module_name":47,"category_name":95,"show_sort_weight":96,"slug":97},11,"Presentations",90,"presentations",{"id":22,"doc_module":11,"doc_module_name":47,"category_name":99,"show_sort_weight":100,"slug":101},"Resumes",80,"resumes",{"id":103,"doc_module":11,"doc_module_name":47,"category_name":104,"show_sort_weight":105,"slug":106},14,"Invoices",70,"invoices",{"id":108,"doc_module":11,"doc_module_name":47,"category_name":109,"show_sort_weight":110,"slug":111},15,"Posters",60,"posters",{"id":113,"doc_module":11,"doc_module_name":47,"category_name":114,"show_sort_weight":115,"slug":116},16,"Social Media",50,"social-media",{"id":118,"doc_module":11,"doc_module_name":47,"category_name":119,"show_sort_weight":120,"slug":121},17,"Forms",40,"forms",{"id":123,"doc_module":11,"doc_module_name":47,"category_name":124,"show_sort_weight":125,"slug":126},18,"Letters",30,"letters",{"id":128,"doc_module":11,"doc_module_name":47,"category_name":129,"show_sort_weight":130,"slug":131},21,"Paper Templates",5,"papers-templates",{"id":12,"doc_module":11,"doc_module_name":47,"category_name":13,"show_sort_weight":4,"slug":133},"general-158"]