Jean-Roger MATESO
Senior Mine Geologist
Bugolobi,102
Summary
Dynamic and results-oriented mine geologist with over 15 years of extensive experience in Exploration, open-pit and underground mining operations at a tier one gold mine. Expertise in database, geological regional, pit, vertical shaft and underground mapping, drill planning, execution, logging and interpretations; ore body and geology modeling of gold in shear hosted and folded system. I am organized, focused and ambitious mining professional with a capacity to adapt appropriately to work in any situation. A team member with an open communication style and willing to share information. Results oriented, self-motivated and decisive, with excellent conceptual and analytical skills, organizational and planning skills. Managerial, strong desire to excellence and acting as Mineral Resource Manager.
Overview
15
15
years of professional experience
5
5
years of post-secondary education
8
8
Certifications
2
2
Languages
Work History
Underground Geology Superintendent
Barrick Gold Corporation
Durba, Haut Uele
12.2023 - Current
- Company Overview: Kibali Gold Mines, Congo DRC
- Safely managing the team, drilling contractors and drilling operation by driving zero harm workplace through visible felt leadership, stop work authority and updating Standard Operating Procedures
- Assist and acting the Mineral Resource Manager
- Leading, managing and mentoring junior members of the team
- Attending the production, planning meeting and call with executives
- Follow up underground production, grade control and brown field drilling
- Managing grade control processes on site to optimize production
- Cross-Validate the geological interpretations (lithology, weathering, redox, oxidation, mineralization, etc.) versus drill data received from stakeholders
- Validate all information related to the resource by ensuring assays, composites, densities, collar, downhole survey are accurate before starting any modeling
- Ensure delivery of geological models updated with the latest data to support mine planning and resource updates
- Plan and execute underground drilling programs in line with operational and corporate objectives
- Assess the performance of the Resource/Grade control model against Mine to mill recon check out (MCF)
- Attend and actively participate in shift change meetings and provide accurate handover notes/information on problems, events and process changes to cross shift
- Kibali Gold Mines, Congo DRC
- Achievements: Long hole stopping mining with less than 5% of dilution and ounces recovery great or equal 95% for primary stopes and less than great or equal 89% for secondary stopes
- Grade control covered 95% of the planned 18 months stopes production
- Growth drilling intercepted high grade open system in down plunge with projection to convert +1Moz into resource and reserve by end of year
Open Pit and Underground Grade Control Drilling Superintendent
Barrick Gold Corporation
Durba, Haut Uele
05.2023 - 12.2023
- Company Overview: Kibali Gold Mines, Congo DRC
- Conduct safety toolbox meeting, safety inspections on drill sites and equipment’s, ensure that all company safety standards, policies and procedures are followed, as well as the Occupational Health and Safety Act and the Mining Act and Regulations
- Supervision, development, and training of the geological team
- Co-ordinate geological grade control and production activities relating to Open Pit and Underground operations
- Timely management of drilling programs including target generation, drill program design, implementation, and data management
- Review the data integrity and quality during each drilling campaign and ensure effective communication is maintained with all relevant team members
- Development of 3D geological models and resource estimations to improve the geological understanding of the deposit and for accurate grade control definition pre-mining
- Managed all drill contractors
- Planned and design Drill Target (Reverse Circulation and Diamond Holes)
- Developed, updated and implemented grade control procedures (SOP) in the open pit mine regarding the RC sampling
- Identified opportunities around the mine in term of the mineralization continuity along plunge and dip
- Checked and submitted to the finance the contractors’ expenses for the payment purpose
- Assisted Junior Geologists in their daily tasks
- Actively participated in skills development of newly graduated / Junior Geologists from their day one as per the company requirements
- Kibali Gold Mines, Congo DRC
- Achievements: Surface drilling covered in ahead 95% of 12 months surface ore production
- Underground grade control achieved 97% of 18 months stopes production
- Drilling cost in line with budget for both surface and underground drilling
Underground Grade Control and Growth Drilling Superintendent
Barrick Gold Corporation
04.2022 - 05.2023
- Company Overview: Kibali Gold Mines, Congo DRC
- Ensured that all company safety standards, policies and procedures are followed, as well as the Occupational Health and Safety Act and the Mining Act and Regulations
- Identifying, developing, and managing growth opportunities for mineral resources, including geological modeling, resource estimation, exploration program design, and team leadership
- Supervise drilling contractors for compliance to safety, as well as compliance to drill design
- Attending the daily production and planning meeting to ensure drilling plan is well integrated in daily mine plan to avoid any miscommunication
- Supervise staff in the core yard on the mark up and logging of diamond drill core to ensure data is collected efficiently, accurately and in a timely manner, and that all wok in the core yard is done safely
- Plan, design and monitor grade control drilling programs to accurately delineate the ore body ahead of mining
- Provide and validate sectional interpretation of grade control data and produce validated polygon and wireframe models
- Regularly update the grade control block model
- Geological core logging and sections interpretation including structure and ore modelling
- Closely working with the Resource geologist on modelling, Estimation, Evaluation and updates on all projects
- Closely working with Metallurgical Process Lab and Plant Engineers to ensure the recovery challenges and relation Recovery vs Sulfides are well analyzed, understood, and highlighted with action plan to ensure the feeding not get compromised
- Provide daily, weekly and monthly reports on grade control drilling, ore reconciliation, mine geology and grade drivers
- Kibali Gold Mines, Congo DRC
- Achievements: Underground grade control achieved 97% of 18 months stopes production
- Growth drilling identified high grade open system in down plunge and converted +1Moz into resource and reserve by end of year
Senior Underground Production Geologist
Randgold Resources Limited
Durba, Haut Uele
03.2013 - 04.2022
- Company overview: Kibali Goldmines, Congo DRC
- Safely managing the team by driving zero harm workplace through visible felt leadership and stop work authority Train junior geologist and technicians
- Stope notes, evaluation, run firing sequences estimation, stope reconciliation, End of month reconciliation and stope closure note
- Train, mentor and develop staff on both technical and safety processes and procedures
- Attending the daily production meeting to ensure drilling plan is well integrated in daily mine plan to avoid any miscommunication
- Oversaw all drilling activities on daily basis
- Update or generate 3D litho-structural and mineralization models (wireframes)
- Updated and Validated the Database with new data
- Conduct underground mapping both underground and vertical shaft for full understanding of the ore body, with the aim of building a robust geological model and improving the exiting and checking the ore mark up in the field
- Plan, design and monitor grade control drilling programs to accurately delineate the ore body ahead of mining
- Calculated and analyzed the drill holes assays result received from the Lab versus the Block Model prediction
- Prepared the daily and weekly
- Geological logging and sampling of diamond drill core
- Liaising with Diamond drilling Contractor supervision
- Collect geological data for the purpose of ore interpretation and reserve and resource calculations
- Communicate changes in ore interpretation to geology department
- Kibali Goldmines, Congo DRC
- Achievements: Underground grade control drill coverage achieved 98% of 18 months stopes production
- Long hole stopping mining with less than 5% of dilution and ounces recovery great or equal 95% for primary stopes and less than great or equal 89% for secondary stopes
Project Exploration Geologist
Société Minière de KILO-MOTO
06.2010 - 03.2013
- Company Overview: Congo DRC
- June 2010-December 2011: Regional mapping, soil sampling, pit and tranches mapping, grade control drilling in paternal ship with Kibali Goldmines at ATEKOMA and GALAKO Archean Moto belt system, geological section interpretation and modeling
- December 2011-September 2012: Regional mapping and pit mapping in paternal ship with SRK Consulting in MOKU-BEVERENDI, GIRO and WANGA deposit in Moto belt Archean system
- September 2012-February 2023: Regional mapping and pit mapping in paternal ship with Goldfield in Rambi pit in Moto belt Archean system
- Congo DRC
- Achievements: Produce surface and pits maps
- Tailing dump mapping, estimation and mining
- Developing target, estimating the ore body and small scale mining
Education
Bachelor of Science (BSc. Hons) - Geological Sciences (Exploration and Mining)
UNIKIN (Université De Kinshasa)
Kinshasa 01.2003 - 01.2008
Skills
Maptek/Vulcan
Surpac
- Micromine
- Leapfrog
Certification
Leadership and Management, Barrick Academy, 06/01/24
Phone Numbers
(+243) 811-471-848, (+256) 705-425-484
Personal Information
Date of Birth: 03/10/83
Professional Skills - Software
Expert level, Advanced level, Advanced level, Advanced level, Advanced level, Advanced level, Advanced level, Advanced level
Referees
Babacar Diouf
Chief Executive Officer,
Azimuth Consulting-Senegal Former Kibali Resource Manager Dakar
b4diouf@gmail.com
+221 777 847 614
Sekou Dialo
Mineral Resources Manager,
Kibali Gold, DRC
Sekou.Diallo@barrick.com
+243 811 638 733
Pierre KANKU
Mineral Resources Manager,
Centamin PLC, Egypt
Former Kibali Mineral Resources Manager Lubumbashi, DRC
pierkanku@yahoo.fr
+243 815 630 650
Timeline
Underground Geology Superintendent
Barrick Gold Corporation
12.2023 - Current
Open Pit and Underground Grade Control Drilling Superintendent
Barrick Gold Corporation
05.2023 - 12.2023
Underground Grade Control and Growth Drilling Superintendent
Barrick Gold Corporation
04.2022 - 05.2023
Senior Underground Production Geologist
Randgold Resources Limited
03.2013 - 04.2022
Project Exploration Geologist
Société Minière de KILO-MOTO
06.2010 - 03.2013
Bachelor of Science (BSc. Hons) - Geological Sciences (Exploration and Mining)
UNIKIN (Université De Kinshasa)
01.2003 - 01.2008
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