Ann: Satrokala Iron Ore Project First Exploratory Drilling Update, page-9

FYI, from ChatGPT:

IOCG deposits are typically associated with specific geological settings and characteristics, such as large-scale brecciation, significant volumes of iron oxide minerals (usually hematite or magnetite), and a close association with magmatic-hydrothermal systems.

Madagascar has geological features that suggest the presence of magmatic-hydrothermal systems.

1. Tectonic Setting:Madagascar's geological history involves significant tectonic activity, including rifting and magmatism. The island's position at the junction of several major tectonic plates has led to extensive magmatic and hydrothermal activity over geological time scales (GeoScience World).

2. Presence of Large Igneous Provinces (LIPs):Madagascar hosts large igneous provinces, such as the Karoo-Ferrar LIP, associated with significant magmatic activity. These provinces can provide the heat and fluid flow necessary for hydrothermal systems (GeoScience World).

3. Existing Mineral Deposits:

   • Nickel-Cobalt Deposits: The Ambatovy deposit is one of the world's largest nickel-cobalt deposits, formed through lateritic processes over ultramafic rocks. These types of deposits often have underlying magmatic-hydrothermal systems.
   • Graphite Deposits: Madagascar is known for its high-quality graphite deposits, such as those at Ambatolampy. Graphite deposits can be associated with hydrothermal fluids emanating from deeper magmatic sources.

4. Geochemical Anomalies:Areas with significant geochemical anomalies, particularly of metals like copper, gold, and rare earth elements, often indicate past hydrothermal activity driven by magmatic sources. Exploration companies have identified such anomalies in various regions of Madagascar, hinting at magmatic-hydrothermal processes (GeoScience World).

5. Volcanic Activity:Historical and recent volcanic activity in Madagascar provides additional evidence of magmatic systems. The Ankaratra and Itasy volcanic fields are examples where ongoing magmatic activity suggests the potential for related hydrothermal systems.

6. Scientific Studies:Research studies have documented hydrothermal alteration and mineralization in several regions of Madagascar, often associated with intrusive igneous rocks. These studies provide direct evidence of magmatic-hydrothermal processes at work.
   
   Examples of Magmatic-Hydrothermal Evidence

7. Ankaratra Volcanic Field:This field has documented evidence of hydrothermal alteration zones, often associated with volcanic and sub-volcanic intrusions, indicative of active magmatic-hydrothermal systems.

8. Bekisopa and Satrokala Areas:The discovery of magnetite, pyrite, and pyrrhotite at Bekisopa and Satrokala by Akora Resources indicates a potential hydrothermal system. The differences in magnetic susceptibility and the presence of sulfide minerals suggest a complex mineralizing system, possibly magmatic-hydrothermal in nature.