Critical metals and minerals in Fennoscandia – advanced exploration methodsMay
As part of the consortium of EGT-TWINN, the Geological Survey of Finland (GTK)
invites geoscience experts from partner organisations to the course entitled
“Critical metals and minerals in Fennoscandia – advanced exploration methods”
Course Overview:
This three-day course is designed to provide geologists and exploration
professionals with the knowledge and practical skills to log drill cores effectively,
with a focus on volcanic terranes' lithological, structural, and alteration features.
Through lectures, hands-on training, and case studies, participants will deepen
their understanding of rock types, volcanic textures, and alteration assemblages,
improving their ability to make accurate observations and interpretations in the
context of mineral exploration, particularly for volcanogenic massive sulfide (VMS)
Course Schedule:
Day 1: Fundamentals of Drill Core Logging
The first day of the course will cover the basic principles of drill core logging,
beginning with lithological observations and progressing to sampling techniques,
quality assurance and quality control (QA/QC) practices, and proper
documentation. This foundational knowledge will set the stage for more advanced
topics in the following days.
Days 2 and 3: Advanced Skills for Volcanic and Alteration Assemblage Recognition
During the second and third days, participants will gain hands-on experience and
learn to:
- Improve Confidence in Rock Type Identification: Develop a systematic
approach to naming rock types and recognizing volcanic textures and facies, even
in metamorphosed and deformed volcanic terranes.
- Recognize Metamorphosed Alteration Assemblages: Understand the
significance of different alteration assemblages in VMS exploration and how to
interpret their relationships to mineralization.
- Utilize Hand-Held Analytical Tools for Exploration: Learn how to use modern
tools such as Portable XRF, Portable XRD, LIBS, Raman spectroscopy, and
hyperspectral imaging to enhance field observations and vector toward potential
Who Should Attend:
This course is ideal for geologists, exploration geoscientists, and field
professionals involved in mineral exploration who seek to enhance their core
logging skills and gain specialised knowledge in volcanic terranes and alteration
processes.
Action details
EGT-TWINN project code: 2.5.1.
Official title: The European Green Deal challenging advanced exploration and valorisation methods of critical raw materials
Date: 25. -29. August 2025
Location: Loppi drill-core shed
Person responsible @EGT: Lauri Joosu
Person responsible @GTK: Janne Hokka
As part of the consortium of EGT-TWINN, the Geological Survey of Finland (GTK)
invites geoscience experts from partner organisations to the course entitled
“Critical metals and minerals in Fennoscandia – advanced exploration methods”
to be held on 25th-29th August 2025 in Espoo-Loppi, Finland.
Lecturers/supervisors:
Three experts from the GTK with experience in field geology, bedrock mapping, structural geology, and mineral exploration will lead this course:
- Janne Hokka
- Ville Järvinen
- Irmeli Huovinen
This three-day course is designed to provide geologists and exploration
professionals with the knowledge and practical skills to log drill cores effectively,
with a focus on volcanic terranes' lithological, structural, and alteration features.
Through lectures, hands-on training, and case studies, participants will deepen
their understanding of rock types, volcanic textures, and alteration assemblages,
improving their ability to make accurate observations and interpretations in the
context of mineral exploration, particularly for volcanogenic massive sulfide (VMS)
deposits.
Day 1: Fundamentals of Drill Core Logging
The first day of the course will cover the basic principles of drill core logging,
beginning with lithological observations and progressing to sampling techniques,
quality assurance and quality control (QA/QC) practices, and proper
documentation. This foundational knowledge will set the stage for more advanced
topics in the following days.
Days 2 and 3: Advanced Skills for Volcanic and Alteration Assemblage Recognition
During the second and third days, participants will gain hands-on experience and
learn to:
- Improve Confidence in Rock Type Identification: Develop a systematic
approach to naming rock types and recognizing volcanic textures and facies, even
in metamorphosed and deformed volcanic terranes.
- Recognize Metamorphosed Alteration Assemblages: Understand the
significance of different alteration assemblages in VMS exploration and how to
interpret their relationships to mineralization.
- Utilize Hand-Held Analytical Tools for Exploration: Learn how to use modern
tools such as Portable XRF, Portable XRD, LIBS, Raman spectroscopy, and
hyperspectral imaging to enhance field observations and vector toward potential
ore zones.
This course is ideal for geologists, exploration geoscientists, and field
professionals involved in mineral exploration who seek to enhance their core
logging skills and gain specialised knowledge in volcanic terranes and alteration
processes.