Geological Survey of India (GSI) findings reveal that samples from India’s only active mud volcano located in the Andaman Islands date back 23 million years. The discovery provides new insights into the region’s geological history and the activity of mud volcanoes in the Andaman and Nicobar Islands.
GSI finds samples from India’s only active mud volcano in Andaman date back 23 million years, revealing key insights into regional geological history.
The Geological Survey of India (GSI) has announced that samples collected from India’s only active mud volcano, situated in the Andaman Islands, date back approximately 23 million years. This significant finding sheds light on the ancient geological processes in the region and offers valuable information about volcanic and tectonic activity beneath the Andaman and Nicobar archipelago.
The mud volcano, located in the South Andaman district, has been a subject of scientific interest given its rarity and continuous activity. Mud volcanoes are geological formations that release a slurry of mud, water, and gases, typically methane, from underground sources. Unlike conventional magma-based volcanoes, mud volcanoes result from the expulsion of sediment and fluids due to tectonic pressure. The Andaman mud volcano is the only known active example in India.
According to GSI, the research was conducted through detailed sampling and analysis of sediments expelled by the mud volcano. Radiometric dating techniques revealed that these deposits originate from strata formed around 23 million years ago, placing them within the Miocene epoch. This time frame is significant as it coincides with notable tectonic shifts in the Indo-Myanmar region linked to the ongoing subduction of the Indian plate beneath the Burmese plate.
Dr. Anil Kumar, a senior geologist at GSI, explained, “The mud volcano’s samples provide a rare window into the deep subsurface geology of the Andaman region. Understanding the age and composition of these materials helps us reconstruct the geological evolution of this zone and assess geohazards such as earthquakes and mud volcanic eruptions.”
The Andaman and Nicobar Islands are part of a seismically active zone situated on the boundary of the Indian and Eurasian tectonic plates. The region has a history of devastating earthquakes, including the massive 2004 Sumatra-Andaman earthquake and the resulting tsunami. Studying the mud volcano’s activity and its geological deposits contributes to broader efforts to monitor and mitigate natural disasters in this vulnerable area.
The GSI’s investigation also involved monitoring gas emissions from the volcano. Methane gas concentrations measured around the site provide clues about subsurface microbial activity and hydrocarbon presence. These findings may have implications for future research into natural gas resources and environmental monitoring.
Mud volcanoes are relatively uncommon worldwide, with prominent examples found in regions such as Azerbaijan, Indonesia, and the Gulf of Mexico. The occurrence of an active mud volcano in the Andaman Islands highlights the unique geological setting of the Indian Ocean’s eastern margin.
Local authorities and environmental experts have expressed interest in promoting awareness about the mud volcano. The site holds potential for geotourism and educational outreach, allowing visitors and students to learn about earth science phenomena firsthand.
In conclusion, the GSI’s revelation that the samples from India’s only active mud volcano date back 23 million years provides important scientific data on the region’s geological history. Continued study of the mud volcano’s behavior and emitted materials will enhance understanding of tectonic activity and natural hazards in the Andaman and Nicobar Islands.
