Context: India has bagged a 15-year contract for exploration of polymetallic sulphides in the northwest Indian Ocean from the International Seabed Authority (ISA).
Relevance of the Topic:Prelims: Key facts about Polymetallic Sulphides; International Seabed Authority; Carlsberg Ridge.
Licence to explore Indian Ocean for Polymetallic Sulphides:
- This is the first licence granted globally for exploring polymetallic sulphur nodules in the Carlsberg Ridge.
- The contract area covers 10,000 sq. km. in parts of the Carlsberg Ridge in the Indian Ocean.
Polymetallic Sulphides Nodules:
- PMS nodules are hydrothermal mineral deposits or concentrations of rock found in the deep ocean (mid-ocean ridges and hydrothermal vents).
- They form when hot, mineral-rich fluids from the Earth's mantle mix with cold ocean water, resulting in the precipitation of metal sulphides.
- These metalliferous muds contain large amounts of copper, zinc, lead, iron, silver and gold.

Carlsberg Ridge:
- The Carlsberg Ridge is 3,00,000 sq. km. stretch that lies in the Indian Ocean, specifically in the Arabian Sea and northwest Indian Ocean.
- It forms the boundary between the Indian and Arabian tectonic plates.
- The ridge separates the Arabian Sea to the northeast from the Somali Basin to the southwest.

Key facts about Exploration Process:
- For exploration in areas part of the ‘high seas’ or part of the ocean not part of their territories, countries must obtain permission from the International Seabed Authority (ISA).
- These rights are specifically designated for regions within the open ocean defined as marine expanses encompassing the air above, surface, and seabed; where no nation holds sovereignty claims.
- Countries have exclusive rights extending up to 200 nautical miles from their borders, including the underlying seabed.
- Countries can claim up to 350 nautical miles from their coasts as their continental shelf. Countries in the Bay of Bengal can claim up to 500 nautical miles as per the United Nations Convention on the Laws of the Sea (UNCLOS).
- If the claim is approved, the country gains priority to explore and potentially exploit both living and non-living resources in the designated region.
About International Seabed Authority:
- Autonomous international organisation established under the 1982 United Nations Convention on the Law of the Sea (UNCLOS).
- It is the organisation through which States Parties to UNCLOS organise and control all mineral-resources-related activities in ‘the Area’ for the benefit of humankind as a whole.
- The international seabed area represents around 50% of the total area of the world’s oceans.
- ISA has the mandate to ensure the effective protection of the marine environment from harmful effects that may arise from deep-seabed-related activities.
- All States Parties to UNCLOS are members of ISA (including India).
- Headquarters: Kingston, Jamaica
India’s third exploration contract with ISA:
- The contract is India’s third exploration contract with the ISA and is its second for PMS.
- India had exploratory rights from the ISA in the Central Indian Ocean Basin (till 2027).
- India had obtained exploratory rights for polymetallic sulphides in the Indian Ocean Ridge (2031).
- India has become the first ISA Member State to hold two contracts for PMS exploration and to have the largest area allocated in the international seabed area.
India continues to conduct its exploration activities in areas beyond national jurisdiction strictly within the framework of the UNCLOS and under the mandate of ISA.




