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PROJECT 1 : Mining  Operation 2020

We have successfully undertaken a comprehensive overhaul of an aging small open pit, implementing innovative strategies to revitalize its operations. Through meticulous planning and execution, we have significantly increased the ore mining capacity, surpassing an impressive milestone of over 500,000 metric tons per annum. Additionally, our team has successfully commissioned and operated a state-of-the-art vat leach process upgrade, featuring 30 vat cells, resulting in remarkable improvements in operational efficiency and productivity. These diligent efforts have culminated in the client operation consistently yielding over 22,000 ounces per annum in refined Gold dore.

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PROJECT 2 : Process Optimization 2021

In our relentless pursuit of scientific advancement in gold processing using the Vat Leaching (VAT) method, we have achieved significant breakthroughs resulting in a noteworthy enhancement of the recovery percentage from 55% to an impressive 62%. Through meticulous research and development endeavors, we have successfully optimized the utilization of cyanide and reagents, employing sophisticated methodologies to strike a delicate balance between effective utilization and environmental responsibility. Notably, we have devised an advanced cyanide mixing tank, leveraging state-of-the-art technologies to enable precise control and management of cyanide solutions, thereby mitigating potential ecological risks. Furthermore, our innovative process flow design has yielded remarkable gains in water consumption reduction, a critical consideration for water-limited mining operations. This optimized flow pattern has demonstrated exceptional efficacy in augmenting the vat's bonding mechanisms, resulting in a substantial reduction in leaching time and a consequent increase in gold production. These momentous advancements exemplify our profound understanding of the VAT method, showcasing our unwavering dedication to delivering scientific excellence and sustainable solutions at the forefront of gold processing technology.

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PROJECT 3 : Test lab development 2021

The test laboratory within the gold mine has undergone significant advancements to enhance its capabilities and optimize sample analysis processes. Through a comprehensive development initiative, the laboratory has been upgraded to handle a remarkable increase in sample throughput from 30 to 100 samples per day while utilizing the same equipment. To ensure the reliability and quality of the results, rigorous QA/QC verification procedures have been implemented and the lab has been updated accordingly. Special attention has been given to utilizing existing tools and equipment meticulously to prevent any potential sample contamination. Additionally, meticulous documentation practices have been established to eliminate any misleading factors in the samples, ensuring accurate analysis outcomes. The laboratory chemists and labor force have received extensive training to proficiently manage the lab operations, enabling them to enhance efficiency and precision in the test results. By closely collaborating with the near mine exploration team, the laboratory provides exceptional support to geologic and mine engineers, aiding in the strategic extraction of ore from the concession

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PROJECT 4 : Reliability study for the machines 2021

The equipment reliability study for the process equipment, including crushers, screens, generators, and an aggulmilator, was conducted at a gold operation site. Our reliability planning engineer undertook this study to ensure uninterrupted operation of the equipment, minimize downtime, and maintain optimal performance. The engineer followed a systematic approach in several steps, specifically tailored to the unique requirements of the gold operation site.


To begin, the engineer collected and analyzed historical data specific to the gold operation site. This included data on equipment performance, downtime incidents, maintenance records, and failure patterns. By examining this information, the engineer gained valuable insights into the reliability of each equipment component, identified recurring issues, and recognized weaknesses that needed to be addressed.


Utilizing statistical and reliability engineering techniques, the engineer performed a detailed analysis of the collected data. This analysis focused on identifying critical components that significantly impacted the reliability and performance of the equipment. Understanding these vulnerabilities enabled the engineer to prioritize improvement efforts and allocate resources effectively to ensure the uninterrupted operation of the gold operation site.


Based on the analysis, the engineer developed a comprehensive maintenance strategy tailored specifically to the gold operation site. This strategy encompassed preventive maintenance plans, regular inspections, and condition-based monitoring for key equipment components. By adopting a proactive approach, potential failures were identified in advance, allowing for timely intervention and prevention of unplanned downtime or production disruptions.


To ensure the availability of spare parts, the engineer collaborated closely with the procurement team and equipment suppliers. They identified critical spare parts for each equipment component and established an efficient inventory management system. Considering factors such as lead time, usage rates, and the criticality of the equipment, the engineer ensured that an adequate stock of essential spare parts was readily available on-site.


Additionally, a robust maintenance schedule was developed, taking into account the specific requirements of the gold operation site. This schedule incorporated planned downtime for equipment inspections, repairs, and replacements. By coordinating with the production schedules and optimizing maintenance activities, the engineer minimized the impact on overall gold production while ensuring the long-term reliability of the equipment.


Continuous performance monitoring and feedback loops were implemented to evaluate the effectiveness of the reliability improvement measures. The engineer closely tracked equipment performance metrics, analyzed trends, and incorporated lessons learned into the maintenance strategy. This approach facilitated continuous improvement and the optimization of equipment reliability at the gold operation site.


In conclusion, the reliability planning engineer executed a comprehensive equipment reliability study at a gold operation site. By analyzing historical data, developing a tailored maintenance strategy, ensuring spare parts availability, and implementing a proactive maintenance schedule, the engineer aimed to maintain uninterrupted operation of the equipment, minimize downtime, and optimize the overall performance of the gold operation site.

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PROJECT 5 : 2ed Relinquish Selection for a client 2020

Nautilus was hired by a client to develop a desk study for relinquishing 25% of the current 442km2 active licensed concession area. Nautilus establish a technically competent team including geologists, mining engineers, and a study manager to complete this techno-economic study. The team reviewed the available historical reports and spend seven  days on-site visit to cover all aspects of the licensed area. the license has 6 brownfield sites (historical) besides a considered number of active artisanal mining locations. The geologist categorized mineral assets (resources) at a qualitative base to establish a criterion of relinquished options. The presence of a large area covered by Nubian Sandstone (79km) guided relinquishing option towards the Western boundary of the concession. The concluded relinquishing area reached 147.9 km2 and was predominantly, the western flange of the concession. However, part of the relinquished area is located far south of the concession and excludes one of the fewer priorities’ brownfield prospects. The relinquishing of supports a possible western extension for high priority prospects. The selected relinquishing option will exclude the current Camp and the access road to the concession. The Engineering team estimated a minor budgetary impact (Max 1million LE) if the camp is relocated. The team preferred to keep the camp current and negotiate for "land rent". The access road as of today can easily be replaced by same length paths through the flood valleys. The expected cost of developing a new access road may reach 250,000 LE. The engineering team recommended keeping using the current access road for further note.

Nautilus supports the proposed relinquishing scenario showing the lowest impact on resource losses and minor budgetary impact on current assets of the project.

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PROJECT 6 : Exploration

Nautilus has successfully managed and operated Ebdaa gold company's exploration program for a duration of two years. Our involvement with the Ebdaa Abydos project, a 107km2 grassroot exploration concession, has encompassed various essential activities such as geology, remote sensing, surface sampling, assay lab operations, ground surveying, and diamond drilling, exceeding 8800m within a span of just five months. From the initial stages of the project, including the tendering process with the ministry of petroleum and minerals, until the present day, Nautilus has taken charge of overseeing all aspects of the project's execution.


Furthermore, as part of our responsibilities, we have successfully recruited and managed the services of the drilling contractor, Geodrill, ensuring their adherence to project requirements and timelines. Additionally, a team of highly experienced Australian geology experts has been employed to oversee the development of resources, guaranteeing the application of industry best practices and standards throughout the project.


Our comprehensive involvement in the Ebdaa Abydos project, from its initiation during the tendering phase with the ministry of petroleum and minerals to its ongoing progress, showcases Nautilus's ability to handle all aspects of exploration program management efficiently and effectively.

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PROJECT 7 : Drilling Plotting , drilled core logging and interpretation

In the realm of professional geological and mining engineering, a range of highly specialized services are offered in the domains of drilling plotting, drilled core logging, and interpretation. These services are paramount in comprehending subsurface geology, discerning potential mineral reservoirs, and optimizing drilling endeavors. Below, I present an overview of the services typically rendered in these areas, characterized by their professional rigor and technical excellence:


Drilling Plotting:

Wellsite Selection: Meticulously evaluating geological data and site conditions to discern optimal locations for drilling wells, incorporating factors such as lithology, structural features, and anticipated resource distribution.

Well Planning: Formulating comprehensive drilling plans encompassing target depths, drilling methodologies, and requisite equipment specifications, all meticulously tailored to specific project requirements.

Borehole Layout Design: Skillfully crafting detailed maps and blueprints delineating the precise arrangement and orientation of boreholes within a given drilling program, ensuring maximum efficiency and coverage.

Drill Path Optimization: Conducting sophisticated analyses of subsurface data to optimize the trajectory of drill paths, accounting for variables such as target depth, geological structures, and the desired sampling or resource extraction objectives.

Drilled Core Logging:


Core Sampling: Executing precise collection and extraction of cylindrical rock samples (cores) from drilled boreholes, utilizing meticulous techniques to minimize disturbance and ensure sample integrity.

Core Photography: Employing advanced imaging methodologies to capture high-resolution photographs of core samples, facilitating meticulous documentation and enabling detailed visual analysis.

Core Description: Methodically scrutinizing core samples and recording pertinent physical properties, including color, texture, lithology, mineralogy, and structural attributes, enabling a comprehensive understanding of the subsurface stratigraphy.

Stratigraphic Correlation: Employing comparative analyses of core samples from different boreholes to establish coherent and accurate geological frameworks, enhancing geological modeling and predictive capabilities.

Geotechnical Logging: Conducting comprehensive assessments of the geotechnical properties of core samples, encompassing rock strength, porosity, permeability, and other pertinent parameters, vital for engineering design and stability evaluations.



Lithological Interpretation: Delving into the characteristics and composition of rock formations based on meticulously logged core data and geological information, facilitating a comprehensive understanding of lithological variations within the subsurface.

Mineralogical Interpretation: Identifying and quantifying minerals present in core samples through advanced analytical techniques, enabling the determination of potential mineral resources and the assessment of their economic viability.

Structural Interpretation: Astutely interpreting geological structures observed in core samples, such as faults, fractures, and folds, unraveling the subsurface deformation history and identifying potential fluid migration pathways.

Petrophysical Interpretation: Integrating core data with complementary geophysical measurements to estimate crucial reservoir properties, including porosity, permeability, and hydrocarbon saturation, underpinning resource evaluation and development planning.

Geotechnical Interpretation: Thoroughly evaluating the geotechnical properties of subsurface materials to inform engineering design, stability analyses, and resource extraction strategies, ensuring optimal operational outcomes.

These services furnish geological and mining engineers with indispensable insights, enabling them to make judicious decisions throughout the exploration, resource assessment, and mining phases. Through their unwavering commitment to professional excellence, these services form the bedrock of informed and proficient decision-making within the geological and mining engineering domain.