Gold exploration in tropical landscapes

Online course

50 hours / 6 weeks

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    Introduction

    Laterite soil covers one third of the world’s land mass. To be successful in mineral exploration one must understand (1) how laterite is formed and (2) which part of the laterite is the best sample medium for geochemical field surveys.

    How do we explore in laterite environments to find the bedrock-hosted mineral deposits buried beneath?  Which season provides the most favourable exploration window? How is primary ore transformed to oxide ore and enriched in grade? These questions are answered from an exploration geologist perspective, and real-life case studies are presented.

    Gold exploration in tropical latitudes goes hand in hand with small-scale and artisanal gold mining. With careful study, the style and the geographical locations of surface mine workings can be used as vectors to find the primary gold at depth.

    Supplementary materials include a glossary of terminology, sample logging sheets and soil colour codes, as well as a list of references.

    Objectives

    This course will prepare and train men and women for field surveys in lateritic environments.

    Exploration geologists can take this course to build on their existing field skills.


    Limited places.

    Module 1: Introduction to Gold Exploration in the Tropics

    • – Recent gold discoveries at tropical latitudes
    • – Styles of gold mineralization
    • – Multiple deposits within the same gold trend
    • – Location of the Tropics
    • – The Köppen – Geiger classification system for tropical climates
    • – Tropical rainforest climate (Af)
    • – Tropical monsoon climate (Am)
    • – Tropical savanna climate (Aw)
    • – Vertical climate zonation
    • – Plotting rainfall to determine climate type and seasonality
    • – Significance of recognizing climate zone type

     

    Module 2: Tropical Weathering of Bedrock 

    • – Regolith
    • – Tropical soils
    • – Tropical weathering rates
    • – Global distribution of laterite weathering

     

    Module 3: Zones of the Laterite Regolith

    • – All the layers of the laterite regolith are presented, from surface down to bedrock
    • – Varying laterite thickness
    • – Termite mound sampling
    • – Examples of tropical laterite regolith around the world

     

    Module 4: Formation of Laterite Regolith

    • – Controls on the formation of laterite regolith
    • – Temperature, rainfall, and groundwater action
    • – Eh, pH, hydrolysis and oxidation of minerals
    • – Leaching and precipitation of minerals
    • – Preservation of laterite regolith

     

    Module 5: Dispersion of Gold in the Laterite Regolith

    • – The Bre-X Fraud
    • – Gold dispersion factors
    • – Water table fluctuations and mechanical dispersion
    • – Gold fineness and secondary gold precipitation
    • – Mushroom effect of gold in soils
    • – Supergene oxide enrichment of gold
    • – Lateritized gossans
    • – Oxidation of epithermal gold-silver deposits

     

    Module 6: Exploring for Gold in the Laterite Regolith

    • – Target generation – geochemical field surveys
    • – Stream sediment sampling
    • – Gold indicator minerals
    • – Gold pathfinder elements
    • – Soil sampling
    • – Geochemical footprint of gold deposits in laterite regolith
    • – Displacement of gold in soil anomalies
    • – Secondary dispersion of gold in laterite regolith
    • – Trenching soil anomalies
    • – Artisanal and Small-Scale Gold Mining (ASGM)

    Danae Voormeij

    Danae Voormeij, BSc (Hon), MSc, PGeo, was born in Amsterdam and educated in Canada. Her first international exploration job was conducting ground magnetic surveys in the Gobi Desert of Mongolia for Ivanhoe Mines in 2001. Her first job in the tropics was in 2004, when she was working as a gold exploration geologist at Rosebel Gold Mine in the Amazonian jungles of Suriname.

    By working for junior mineral exploration companies, she gained large responsibilities fast and she was soon defining drill targets and planning drill programs in far and exotic countries, such as Madagascar, Papua New Guinea and Uganda.

    In 2011, as chief geologist for Hummingbird Resources, she led the exploration team to the discovery of Tuzon, a 2.4-million-ounce gold deposit, in the jungles of Liberia, West Africa.

    Danae is a professional gold exploration geologist, registered with the Engineers and Geoscientists of British Columbia (EGBC) since 2007, a member of the Canadian Institute of Mining (CIM) and Geological Association of Canada (GAC) since 2001, and Fellow with the Society of Economic Geologists (SEG) since 2013.

    She is the principal consultant and director for Mynah Exploration Inc. For more information visit www.mynahexploration.com

    All of our courses are offered 100% online, through our intuitive Virtual Campus. Topics are taught through:

    • – Videos
    • – Interactive multimedia content
    • – Live classes
    • – Texts
    • – Case studies
    • – Evaluation exercises
    • – Additional documentation

    The content is updated in each new course edition, so that knowledge is acquired around the latest news and state-of-the-art geotechnical engineering technology.

    One of the most interesting aspects of our courses is the use of live videoconferences, in which teachers and students interact in a continuous exchange of knowledge and problem solving. In addition to this, students can make use of the platform’s forum, a meeting point where they can interact with teachers and other students.

    A tutoring system will also be established by email, which will resolve any possible doubts about the course, and which will serve as a point of connection for students with specific questions on each module.

    Students can also download all course documentation, including texts, videos, video conferences and exercises.

    The course is aimed at science students, exploration geologists, mining analysists, field technicians, and anyone with an interest in the gold exploration industry.

    At the end of the course, and as accreditation of knowledge acquired and of the technical and practical training, students who correctly complete the corresponding evaluation tests of the geotechnical engineering course will obtain an academic certificate issued by Ingeoexpert. This digital certificate is protected by Blockchain technology, making it unique and tamper-proof, thus enabling companies to verify its authenticity.

    It can also be downloaded by students, forwarded by email and shared on social networks, as well as embedded on any website. You can see an example here.

    Exploration geologist; field geologist, field technician, project geologist.

    Introduction

    Laterite soil covers one third of the world’s land mass. To be successful in mineral exploration one must understand (1) how laterite is formed and (2) which part of the laterite is the best sample medium for geochemical field surveys.

    How do we explore in laterite environments to find the bedrock-hosted mineral deposits buried beneath?  Which season provides the most favourable exploration window? How is primary ore transformed to oxide ore and enriched in grade? These questions are answered from an exploration geologist perspective, and real-life case studies are presented.

    Gold exploration in tropical latitudes goes hand in hand with small-scale and artisanal gold mining. With careful study, the style and the geographical locations of surface mine workings can be used as vectors to find the primary gold at depth.

    Supplementary materials include a glossary of terminology, sample logging sheets and soil colour codes, as well as a list of references.

    Objectives

    This course will prepare and train men and women for field surveys in lateritic environments.

    Exploration geologists can take this course to build on their existing field skills.


    Limited places.

    Read more

    Module 1: Introduction to Gold Exploration in the Tropics

    • – Recent gold discoveries at tropical latitudes
    • – Styles of gold mineralization
    • – Multiple deposits within the same gold trend
    • – Location of the Tropics
    • – The Köppen – Geiger classification system for tropical climates
    • – Tropical rainforest climate (Af)
    • – Tropical monsoon climate (Am)
    • – Tropical savanna climate (Aw)
    • – Vertical climate zonation
    • – Plotting rainfall to determine climate type and seasonality
    • – Significance of recognizing climate zone type

     

    Module 2: Tropical Weathering of Bedrock 

    • – Regolith
    • – Tropical soils
    • – Tropical weathering rates
    • – Global distribution of laterite weathering

     

    Module 3: Zones of the Laterite Regolith

    • – All the layers of the laterite regolith are presented, from surface down to bedrock
    • – Varying laterite thickness
    • – Termite mound sampling
    • – Examples of tropical laterite regolith around the world

     

    Module 4: Formation of Laterite Regolith

    • – Controls on the formation of laterite regolith
    • – Temperature, rainfall, and groundwater action
    • – Eh, pH, hydrolysis and oxidation of minerals
    • – Leaching and precipitation of minerals
    • – Preservation of laterite regolith

     

    Module 5: Dispersion of Gold in the Laterite Regolith

    • – The Bre-X Fraud
    • – Gold dispersion factors
    • – Water table fluctuations and mechanical dispersion
    • – Gold fineness and secondary gold precipitation
    • – Mushroom effect of gold in soils
    • – Supergene oxide enrichment of gold
    • – Lateritized gossans
    • – Oxidation of epithermal gold-silver deposits

     

    Module 6: Exploring for Gold in the Laterite Regolith

    • – Target generation – geochemical field surveys
    • – Stream sediment sampling
    • – Gold indicator minerals
    • – Gold pathfinder elements
    • – Soil sampling
    • – Geochemical footprint of gold deposits in laterite regolith
    • – Displacement of gold in soil anomalies
    • – Secondary dispersion of gold in laterite regolith
    • – Trenching soil anomalies
    • – Artisanal and Small-Scale Gold Mining (ASGM)

    Read more

    Danae Voormeij

    Danae Voormeij, BSc (Hon), MSc, PGeo, was born in Amsterdam and educated in Canada. Her first international exploration job was conducting ground magnetic surveys in the Gobi Desert of Mongolia for Ivanhoe Mines in 2001. Her first job in the tropics was in 2004, when she was working as a gold exploration geologist at Rosebel Gold Mine in the Amazonian jungles of Suriname.

    By working for junior mineral exploration companies, she gained large responsibilities fast and she was soon defining drill targets and planning drill programs in far and exotic countries, such as Madagascar, Papua New Guinea and Uganda.

    In 2011, as chief geologist for Hummingbird Resources, she led the exploration team to the discovery of Tuzon, a 2.4-million-ounce gold deposit, in the jungles of Liberia, West Africa.

    Danae is a professional gold exploration geologist, registered with the Engineers and Geoscientists of British Columbia (EGBC) since 2007, a member of the Canadian Institute of Mining (CIM) and Geological Association of Canada (GAC) since 2001, and Fellow with the Society of Economic Geologists (SEG) since 2013.

    She is the principal consultant and director for Mynah Exploration Inc. For more information visit www.mynahexploration.com

    Read more

    All of our courses are offered 100% online, through our intuitive Virtual Campus. Topics are taught through:

    • – Videos
    • – Interactive multimedia content
    • – Live classes
    • – Texts
    • – Case studies
    • – Evaluation exercises
    • – Additional documentation

    The content is updated in each new course edition, so that knowledge is acquired around the latest news and state-of-the-art geotechnical engineering technology.

    One of the most interesting aspects of our courses is the use of live videoconferences, in which teachers and students interact in a continuous exchange of knowledge and problem solving. In addition to this, students can make use of the platform’s forum, a meeting point where they can interact with teachers and other students.

    A tutoring system will also be established by email, which will resolve any possible doubts about the course, and which will serve as a point of connection for students with specific questions on each module.

    Students can also download all course documentation, including texts, videos, video conferences and exercises.

    Read more

    The course is aimed at science students, exploration geologists, mining analysists, field technicians, and anyone with an interest in the gold exploration industry.

    Read more

    At the end of the course, and as accreditation of knowledge acquired and of the technical and practical training, students who correctly complete the corresponding evaluation tests of the geotechnical engineering course will obtain an academic certificate issued by Ingeoexpert. This digital certificate is protected by Blockchain technology, making it unique and tamper-proof, thus enabling companies to verify its authenticity.

    It can also be downloaded by students, forwarded by email and shared on social networks, as well as embedded on any website. You can see an example here.

    Read more

    Exploration geologist; field geologist, field technician, project geologist.

    Read more

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