In recent research, Chomadul Volcano In Romania, it highlights how quickly and how powerfully a long-dormant volcano can erupt.
One of the youngest volcanoes in central-eastern Europe, Ciomadur has not erupted for about 30,000 years. Through sophisticated geological analysis, a team of European scientists has shed further light on the cycles of volcanic activity that Cimaduru has experienced over thousands of years.
In particular, the researchers wanted to observe changes in eruption types over longer periods of time, from milder eruptions. ardent (steady descent of lava) to a more dangerous place explosives (sudden release of gas and lava under intense pressure).
“During the volcano’s almost million-year lifespan, there have been long periods of dormancy, but even after periods of quiescence of tens of thousands of years, sometimes more than 100,000 years, volcanic eruptions have begun again.” To tell Šaborkus Harangi, a geochemist at Eötvös Lorand University in Hungary, says:
The research team conducted a careful study of the crystals and minerals inside the volcanic rocks around Cimadur. The chemical composition and water content of these rocks give experts clues about the eruptive conditions that formed them and when they were formed.
have previously established Although it was thought that there was a period of earlier explosive eruptions, the researchers focused on the most recent period of explosive eruptions, from about 56,000 years ago to about 30,000 years ago.
Our analysis reveals two things magma zone, the depth of the upper zone (8-12 kilometers or 5-7 miles) and the depth of the lower zone (16-40 kilometers). How magma enters the Earth’s surface seems to depend on the origin of this recharge magma.
If it consists mostly of molten lithosphere, the chemicals will be released slowly, but if ocean slabs enter the mix, the chemicals will become more explosive.
Researchers believe that increased crystallinity and water content in the magma emerging from the recharge zone played an important role in the transition from effusion to explosive eruptions after a period of about 10,000 years. It will be done.
”[The most recent eruptions] It was formed by an explosive eruption, which is more dangerous compared to previous active eruptions. ” To tell Barbara Çelep, a geochemist at Eötvös Lorand University.
“Therefore, it is important to know the reason for this change in eruption style.”
It is well known that long-quiet volcanoes can erupt explosively, and it is important to understand more about this process. Although Siomadur is not likely to erupt anytime soon, it is still a useful case study.
One way this research can be useful is by helping to identify signs of an impending eruption. When it comes to that, 1,350 There may be active volcanoes on Earth, so the best way to stay safe is to receive early warning.
“Volcanic eruptions, regardless of their size, pose a significant risk to modern society, but they are often underestimated.” write The researchers state in their published paper:
This research Contributions to mineralogy and petrology.