Geological and seismic research suggests a massive 'hidden ocean' of water chemically bound within minerals deep within the Earth's mantle

Why in news

Geological and seismic research suggests a massive 'hidden ocean' of water chemically bound within minerals deep within the Earth's mantle.

Background

The water is located approximately 700 kilometres beneath the Earth's surface within the mantle. It is chemically bound in minerals like ringwoodite rather than being in a liquid state.

Facts for Prelims

• S&TRingwoodite: A mineral in the Earth's mantle that can hold water in its crystal structure.
• FactThe hidden ocean is located at a depth of approximately 700 kilometres.
• S&TSeismic analysis: Used to detect changes in wave speed associated with water presence in minerals.

For Mains

Q. Discuss how seismic research and mineralogical studies contribute to our understanding of the Earth's internal water cycle and geological composition.

Dimensions to cover in your answer

• Geophysical modeling: Using seismic wave velocity to map mantle mineralogy
• Geochemical cycle: Understanding water sequestration in high-pressure minerals like ringwoodite

Keywords: Seismic analysis · Mantle minerals · Ringwoodite · Geological research · Water cycle

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