Tag Archives: ‘magma

Modeling magma to find copper

Credit: UNIGE Copper is an essential element of our society with main uses in the field of electricity and electronics. About 70% of the copper comes from deposits formed several million years ago during events of magma degassing within Earth’s … Continue reading

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Cyclic change within magma reservoirs controls explosivity of volcanic eruptions

Mt. Kelud erupts in Indonesia. A new study published in Geology uses pockets of melts trapped within crystals to understand the conditions occurring beneath volcanoes before explosive eruptions. Volcanologists from Johannes Gutenberg University Mainz (JGU), Leibniz Universität Hannover in Germany … Continue reading

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Popcorn-rocks solve the mystery of the magma chambers

Popcorn-rocks solve the mystery of the magma chambers Since the 18th century, geologists have struggled to explain how big magma chambers form in Earth’s crust. In particular, it has been difficult to explain where the surrounding rock goes when the … Continue reading

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Magma build-up at Japanese volcano poses threat to ‘Naples of the Eastern World’

This is the Sakurajima volcano with downtown Kagoshima in the foreground. Photo: Kimon Berlin One of Japan’s most active volcanoes could be close to a major eruption, threatening the safety of hundreds and thousands of residents of a nearby city, a … Continue reading

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Magma build-up may put Salvadoran capital at risk

The collapsed caldera of Ilopango is now a large lake. But the volcanic system is still active, and new research suggests tectonic stresses beneath the volcano may be fueling a new accumulation of magma. Photo by Lee Siebert/Smithsonian Institution The … Continue reading

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Can magma crystals predict eruptions?

Blue phenocryst has well developed oscillatory growth zoning with some zonesshowing inclusions. Both crystals show sector zoning. Mineral crystals blasted out from volcanoes can provide a window into the powerful processes going on inside those volcanoes, say UK and German … Continue reading

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Ancient tectonic plate blocks magma plume at Yellowstone, simulation shows

SUPERVOLCANIC ORIGINS A rising plume of hot rock from Earth’s mantle isn’t fueling the Yellowstone supervolcano and its natural wonders (Morning Glory hot spring, shown), new research suggests. The supervolcano lurking under Yellowstone National Park may not have resulted from … Continue reading

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Volcanologists discover how bubbles accumulate in magma

A diagram illustrating the process of vesiculation in a rising magma body; (A) shows the relationship between water content and magma depth, while (B) displays vesiculation within the volcanic system. In 1816, summer failed to make an appearance in central … Continue reading

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Making magma helps researchers understand volcanoes

The best way to figure out how something is made is to take it apart and put it back together again. That is what Jessica Larsen and her students do at the Geophysical Institute’s Petrology Lab in order to understand … Continue reading

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Water plus magma equals increased explosivity

This is Figure 1 from Unema et al., including the location of Okmok volcano on Umnak Island in central Aleutian Islands. When water interacts with magma, it can dramatically increase the explosivity of the eruption. However, water in the eruption … Continue reading

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