Mineral Matters # 585 - The Ozernovskoe epithermal Au–Ag deposit (Kamchatka)
#mineralmatters #minerals #🧪 open.substack.com/pub/mineralm...
#mineralmatters #minerals #🧪 open.substack.com/pub/mineralm...
The Ozernovskoe epithermal Au–Ag deposit (Kamchatka)
Mineral Matters #585
open.substack.com
January 24, 2025 at 11:26 PM
Mineral Matters # 585 - The Ozernovskoe epithermal Au–Ag deposit (Kamchatka)
#mineralmatters #minerals #🧪 open.substack.com/pub/mineralm...
#mineralmatters #minerals #🧪 open.substack.com/pub/mineralm...
Hello Dani, I am a retired professional geologist (Oregon G1475, AIPG RPG-11586) who specialized in volcanic hosted epithermal ore deposits. Visiting and photographing active, dormant and extinct volcanoes has been my lifelong quest. This seems like a nice group to share our mutual interests.
November 25, 2024 at 8:37 PM
Hello Dani, I am a retired professional geologist (Oregon G1475, AIPG RPG-11586) who specialized in volcanic hosted epithermal ore deposits. Visiting and photographing active, dormant and extinct volcanoes has been my lifelong quest. This seems like a nice group to share our mutual interests.
189 of #365Minerals 🧪⚒️
Jordanite:
- Sulphosalt mineral
- Forms via the metamorphism of dolostone contaning lead and arsenic, or in epithermal veins and undersea black smoker chimneys
- Named after Hermann Jordan (1808-1887) a German scientist who provided the original specimens for study #minerals
Jordanite:
- Sulphosalt mineral
- Forms via the metamorphism of dolostone contaning lead and arsenic, or in epithermal veins and undersea black smoker chimneys
- Named after Hermann Jordan (1808-1887) a German scientist who provided the original specimens for study #minerals
July 8, 2025 at 10:10 AM
189 of #365Minerals 🧪⚒️
Jordanite:
- Sulphosalt mineral
- Forms via the metamorphism of dolostone contaning lead and arsenic, or in epithermal veins and undersea black smoker chimneys
- Named after Hermann Jordan (1808-1887) a German scientist who provided the original specimens for study #minerals
Jordanite:
- Sulphosalt mineral
- Forms via the metamorphism of dolostone contaning lead and arsenic, or in epithermal veins and undersea black smoker chimneys
- Named after Hermann Jordan (1808-1887) a German scientist who provided the original specimens for study #minerals
Epithermal deposits have been observed forming in active centers like Kawah Ijen (Ijen happens to be my research focus btw) and several other arc stratocones.
www.researchgate.net/publication/...
www.researchgate.net/publication/...
Fumarolic Activity, Acid-Sulfate Alteration, and High Sulfidation Epithermal Precious Metal Mineralization in the Crater of Kawah Ijen Volcano, Java, Indonesia | Request PDF
Request PDF | Fumarolic Activity, Acid-Sulfate Alteration, and High Sulfidation Epithermal Precious Metal Mineralization in the Crater of Kawah Ijen Volcano, Java, Indonesia | Opinion is divided over ...
www.researchgate.net
January 4, 2025 at 4:40 PM
Epithermal deposits have been observed forming in active centers like Kawah Ijen (Ijen happens to be my research focus btw) and several other arc stratocones.
www.researchgate.net/publication/...
www.researchgate.net/publication/...
Vote #orpiment - found in high-sulfidation epithermal mineral deposits!
#MinCup26 Round 1 Match 5
It's a fiery match of vibrant red #Cuprite and just as saturated orange #Orpiment battle for your votes!
VOTE: www.mineralcup.org/2026/vote-re...
RESULTS: www.mineralcup.org/2026/vote-re...
It's a fiery match of vibrant red #Cuprite and just as saturated orange #Orpiment battle for your votes!
VOTE: www.mineralcup.org/2026/vote-re...
RESULTS: www.mineralcup.org/2026/vote-re...
September 5, 2026 at 8:36 AM
Vote #orpiment - found in high-sulfidation epithermal mineral deposits!
That's so cool! Volcanology is fascinating, and your specialization in volcanic-hosted epithermal ore deposits must have taken you to some incredible locations. Your lifelong quest to visit and photograph active, dormant, and extinct volcanoes sounds like an amazing adventure!
January 3, 2025 at 5:09 PM
That's so cool! Volcanology is fascinating, and your specialization in volcanic-hosted epithermal ore deposits must have taken you to some incredible locations. Your lifelong quest to visit and photograph active, dormant, and extinct volcanoes sounds like an amazing adventure!
American Mineralogist:
The link between gold mineralization and fluid evolution in epithermal systems: A case study of the Dongyang gold deposit, China
He Zhang, et al.
doi.org/10.2138/am-2...
Zhang et al. reconstructed fluid evolution based on the compositional, textural etc. of sulfide minerals.
The link between gold mineralization and fluid evolution in epithermal systems: A case study of the Dongyang gold deposit, China
He Zhang, et al.
doi.org/10.2138/am-2...
Zhang et al. reconstructed fluid evolution based on the compositional, textural etc. of sulfide minerals.
January 6, 2026 at 2:00 PM
American Mineralogist:
The link between gold mineralization and fluid evolution in epithermal systems: A case study of the Dongyang gold deposit, China
He Zhang, et al.
doi.org/10.2138/am-2...
Zhang et al. reconstructed fluid evolution based on the compositional, textural etc. of sulfide minerals.
The link between gold mineralization and fluid evolution in epithermal systems: A case study of the Dongyang gold deposit, China
He Zhang, et al.
doi.org/10.2138/am-2...
Zhang et al. reconstructed fluid evolution based on the compositional, textural etc. of sulfide minerals.
Hot Spring Epithermal System youtu.be/cGIPq1uvngE?...
Hot Spring Epithermal System
YouTube video by GeologyUpSkill
youtu.be
October 2, 2024 at 4:06 PM
Hot Spring Epithermal System youtu.be/cGIPq1uvngE?...
Legacy Minerals discovers new vein trends and expands epithermal system at ... - published 17 Apr 2025 #Mining #Gold #ASX #Drilling #price
Legacy Minerals discovers new vein trends and expands epithermal system at Bauloora Project
Legacy Minerals (ASX:LGM) has reported results from its recent reconnaissance drilling and surface geochemical surveys at the Bauloora Project, expanding the
grafa.com
April 17, 2025 at 2:24 AM
Downside of being out of academia, no access to journal articles. And this is about 3 of my favorite things: quartz, cathodoluminescence, and epithermal mineralization 😢
June American Mineralogist:
Cathodoluminescence textures and trace elements in quartz: Constraints on Ag mineralization in adularia-sericite epithermal systems
Shen Gao, et al.
doi.org/10.2138/am-2...
Cathodoluminescence textures and trace elements in quartz: Constraints on Ag mineralization in adularia-sericite epithermal systems
Shen Gao, et al.
doi.org/10.2138/am-2...
Cathodoluminescence textures and trace elements in quartz: Constraints on Ag mineralization in adularia-sericite epithermal systems | American Mineralogist | GeoScienceWorld
Abstract. Quartz chemistry is important for revealing fluid sources and evolution in hydrothermal deposits, but such information is lacking for many
doi.org
June 11, 2025 at 1:22 PM
Downside of being out of academia, no access to journal articles. And this is about 3 of my favorite things: quartz, cathodoluminescence, and epithermal mineralization 😢
June American Mineralogist:
Cathodoluminescence textures and trace elements in quartz: Constraints on Ag mineralization in adularia-sericite epithermal systems
Shen Gao, et al.
doi.org/10.2138/am-2...
Cathodoluminescence textures and trace elements in quartz: Constraints on Ag mineralization in adularia-sericite epithermal systems
Shen Gao, et al.
doi.org/10.2138/am-2...
Cathodoluminescence textures and trace elements in quartz: Constraints on Ag mineralization in adularia-sericite epithermal systems | American Mineralogist | GeoScienceWorld
Abstract. Quartz chemistry is important for revealing fluid sources and evolution in hydrothermal deposits, but such information is lacking for many
doi.org
June 11, 2025 at 12:54 PM
June American Mineralogist:
Cathodoluminescence textures and trace elements in quartz: Constraints on Ag mineralization in adularia-sericite epithermal systems
Shen Gao, et al.
doi.org/10.2138/am-2...
Cathodoluminescence textures and trace elements in quartz: Constraints on Ag mineralization in adularia-sericite epithermal systems
Shen Gao, et al.
doi.org/10.2138/am-2...
Taking to the skies to map the underground. Kalo Gold Corp. (TSXV: KALO) is rapidly advancing its 6,212-kilometre heli-mag survey at the Vatu Aurum Project in Fiji. High-res data means highly precise drill targets.
www.juniorstocks.com/kalo-gold-s-...
www.juniorstocks.com/kalo-gold-s-...
Kalo Gold's High-Flying Hunt for Epithermal Treasure: X-Raying the Islands
www.juniorstocks.com
May 1, 2026 at 3:56 PM
Taking to the skies to map the underground. Kalo Gold Corp. (TSXV: KALO) is rapidly advancing its 6,212-kilometre heli-mag survey at the Vatu Aurum Project in Fiji. High-res data means highly precise drill targets.
www.juniorstocks.com/kalo-gold-s-...
www.juniorstocks.com/kalo-gold-s-...
There's epithermal gold in them thar pools
December 20, 2025 at 8:46 AM
There's epithermal gold in them thar pools
How do volcanic systems influence gold deposits? #GSABulletin research shows multi-cycle volcanic magmatism played a key role in low-sulfidation epithermal gold mineralization in NE China’s Yanbian area.
geosociety.co/Xu_et_al
#EconomicGeology #Volcanology #Geochemistry
Fig14
geosociety.co/Xu_et_al
#EconomicGeology #Volcanology #Geochemistry
Fig14
July 17, 2026 at 10:00 PM
How do volcanic systems influence gold deposits? #GSABulletin research shows multi-cycle volcanic magmatism played a key role in low-sulfidation epithermal gold mineralization in NE China’s Yanbian area.
geosociety.co/Xu_et_al
#EconomicGeology #Volcanology #Geochemistry
Fig14
geosociety.co/Xu_et_al
#EconomicGeology #Volcanology #Geochemistry
Fig14
American Mineralogist:
Mixing thermodynamic model of Au-Ag Alloys in gold deposits established by a modifier double defect method
Feng Lai, et al.
doi.org/10.2138/am-2...
Epithermal and orogenic deposit conditions result in different compositional distributions of Au-Ag alloys.
Mixing thermodynamic model of Au-Ag Alloys in gold deposits established by a modifier double defect method
Feng Lai, et al.
doi.org/10.2138/am-2...
Epithermal and orogenic deposit conditions result in different compositional distributions of Au-Ag alloys.
April 3, 2026 at 5:50 PM
American Mineralogist:
Mixing thermodynamic model of Au-Ag Alloys in gold deposits established by a modifier double defect method
Feng Lai, et al.
doi.org/10.2138/am-2...
Epithermal and orogenic deposit conditions result in different compositional distributions of Au-Ag alloys.
Mixing thermodynamic model of Au-Ag Alloys in gold deposits established by a modifier double defect method
Feng Lai, et al.
doi.org/10.2138/am-2...
Epithermal and orogenic deposit conditions result in different compositional distributions of Au-Ag alloys.
American Mineralogist:
Native tin as solidified molten-metal droplets in a hydrothermal fluid from the epithermal Pukanec deposit (Slovakia)
Juraj Majzlan, et al.
doi.org/10.2138/am-2...
Tin (Sn) can be transported as droplets of metallic melt & deposited with more common ore minerals.
Native tin as solidified molten-metal droplets in a hydrothermal fluid from the epithermal Pukanec deposit (Slovakia)
Juraj Majzlan, et al.
doi.org/10.2138/am-2...
Tin (Sn) can be transported as droplets of metallic melt & deposited with more common ore minerals.
November 14, 2025 at 12:31 PM
American Mineralogist:
Native tin as solidified molten-metal droplets in a hydrothermal fluid from the epithermal Pukanec deposit (Slovakia)
Juraj Majzlan, et al.
doi.org/10.2138/am-2...
Tin (Sn) can be transported as droplets of metallic melt & deposited with more common ore minerals.
Native tin as solidified molten-metal droplets in a hydrothermal fluid from the epithermal Pukanec deposit (Slovakia)
Juraj Majzlan, et al.
doi.org/10.2138/am-2...
Tin (Sn) can be transported as droplets of metallic melt & deposited with more common ore minerals.
Saw these outcrops of the mineralized, brecciated top of a Miocene basalt flow today, evidence of an epithermal hydrothermal system. This indicates the interactions of mineralized, boiling water, explosively flashing to steam, breaking up the rock, depositing minerals in fractures and cavities (1/2)
September 9, 2025 at 3:57 AM
Saw these outcrops of the mineralized, brecciated top of a Miocene basalt flow today, evidence of an epithermal hydrothermal system. This indicates the interactions of mineralized, boiling water, explosively flashing to steam, breaking up the rock, depositing minerals in fractures and cavities (1/2)
Most #Stibnite ore occurs as hydrothermal replacement in limestone deposits. About 20% occurs in magmatic and hot spring settings, and 20% occurs in diffuse epithermal deposits with Au, typically exploited as open-pit mines.
#MinCup23
#MinCup23
September 30, 2023 at 5:22 PM
Most #Stibnite ore occurs as hydrothermal replacement in limestone deposits. About 20% occurs in magmatic and hot spring settings, and 20% occurs in diffuse epithermal deposits with Au, typically exploited as open-pit mines.
#MinCup23
#MinCup23
Just In: ( OTC: #HANNF ) Hannan Discovers 2.4 km Long Geophysical IP Anomaly at the Vista Alegre Epithermal Prospect at Valiente, Peru
#StockMarket #News
#StockMarket #News
December 5, 2024 at 11:40 AM
Now, now, epithermal gold systems are gorgeous!
But yes, base metals deposits are also very pretty, but the core is so heavy!
But yes, base metals deposits are also very pretty, but the core is so heavy!
June 17, 2025 at 4:22 PM
Now, now, epithermal gold systems are gorgeous!
But yes, base metals deposits are also very pretty, but the core is so heavy!
But yes, base metals deposits are also very pretty, but the core is so heavy!
American Mineralogist:
New minerals auropolybasite [Ag15AuSb2S11] and auropearceite [Ag15AuAs2S11]: Implications for the formation of bonanza ores in epithermal systems
Tomáš Mikuš, et al.
doi.org/10.2138/am-2...
New minerals auropolybasite [Ag15AuSb2S11] and auropearceite [Ag15AuAs2S11]: Implications for the formation of bonanza ores in epithermal systems
Tomáš Mikuš, et al.
doi.org/10.2138/am-2...
February 20, 2026 at 2:21 PM
American Mineralogist:
New minerals auropolybasite [Ag15AuSb2S11] and auropearceite [Ag15AuAs2S11]: Implications for the formation of bonanza ores in epithermal systems
Tomáš Mikuš, et al.
doi.org/10.2138/am-2...
New minerals auropolybasite [Ag15AuSb2S11] and auropearceite [Ag15AuAs2S11]: Implications for the formation of bonanza ores in epithermal systems
Tomáš Mikuš, et al.
doi.org/10.2138/am-2...
Finding Feeder Structures youtu.be/1j3_GiR7HNM?...
Finding Feeder Structures
Feeder structures contain the ore in most high sulphidation epithermal systems. Rule 14 will help you find them.
youtu.be
June 27, 2024 at 6:40 PM
Finding Feeder Structures youtu.be/1j3_GiR7HNM?...