Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Scientists Discover Undersea Volcano Off Antarctica

21.05.2004

Scientists working in the stormy and inhospitable waters off the Antarctic Peninsula have found what they believe is an active and previously unknown volcano on the sea bottom.

The international science team from the United States and Canada mapped and sampled the ocean floor and collected video and data that indicate a major volcano exists on the Antarctic ontinental shelf, they announced on May 5 in a dispatch from the research vessel Laurence M. Gould, which is operated by the National Science Foundation (NSF).

NSF is an independent federal agency that supports fundamental research and education across all fields of science and engineering, with an annual budget of nearly $5.58 billion. NSF manages the U.S. Antarctic Program, which coordinates U.S. scientific research on the southernmost continent and in the Southern Ocean.

Evidence of the volcano came as an unintended bonus from a research plan to investigate why a massive ice sheet, known as the Larsen B, collapsed and broke up several years ago. Scientists hope to understand whether such a collapse is unique or part of a cycle that extends over hundreds of thousands of years.

Scientific evidence the team collected also corroborates mariners’ reports of discolored water in the area, which is consistent with an active volcano.

Eugene Domack, a researcher at Hamilton College in Clinton, New York and the expedition’s chief scientist, said the volcano stands 700 meters (2300 feet) above the seafloor and extends to within roughly 275 meters (900 feet) of the ocean surface.

He estimated that the volcanic cone contains at least 1.5 cubic kilometers (.36 cubic miles) of volcanic rock.

By comparison, Mount Erebus, a known active volcano on Ross Island near McMurdo Station, NSF’s main Antarctic research center, is approximately 3,800 meters (12,400 feet) above sea level.

Hawaii’s Mauna Loa, the largest volcano on Earth, rises approximately 4,100 meters (13,600 feet) above sea level. Mexico’s Cuexcomate volcano is considered to be the world’s smallest, standing 13 meters (43 feet) tall.

The research team comprised scientists from Hamilton College, Colgate University, the Lamont-Doherty Earth Observatory at Columbia University, Montclair State University in New Jersey, Southern Illinois University in Carbondale and Queens University in Canada.

Domack said the volcano lies in an area known as Antarctic Sound, at the northernmost tip of Antarctica.

He noted that there has been "no previous scientific record of active volcanoes in the region" where the new peak was discovered and that it is north of an existing boundary where volcanic activity is known to occur in the region.

The volcano, which has yet to be named, also is unusual, Domack said, in that it exists on the continental shelf, in the vicinity of a deep trough carved out by glaciers passing across the seafloor.

Sonar maps made of the seafloor during a research cruise in January 2002 first suggested that the volcano exists. The so called swath maps showed a large concentric and symmetrical feature on the ocean floor that had not been scoured by the advance and retreat of glaciers. The absence of glacial scours indicates the suspected volcano is fairly young in geologic terms.

But it was not until April of this year that scientists were once again able to venture into the region to examine the evidence further.

In addition to mapping, the research team used a bottomscanning video recorder, rock dredges, and temperature probes to survey the sides and crest of the submarine peak. The video survey revealed a surface that is heavily colonized by bottom-dwelling organisms.

But a dark mat of underwater life is broken along the edges of the volcano by barren patches of dark, black rock indicating that lava has flowed there. Because no life was found on these surfaces, the rock is believed to have formed fairly recently in geologic time.

Rock dredges recovered abundant, fresh, basalt, which normally would be rapidly acted upon and transformed by seawater but appeared unaffected.

Highly sensitive temperature probes moving continuously across the bottom of the volcano revealed signs of geothermal heating of seawater. The heating was noticed especially near the edges of the feature where the freshest rock was observed.

These observations, along with historical reports from mariners of discolored water in the vicinity of the submerged peak, indicate that the volcano has been active recently.

Domack said expects that there will interest among other scientists to return to the area and study the peak in more detail.

"None of us on this cruise," he noted, "are experts in volcanoes."

Peter West | NSF
Further information:
http://www.nsf.gov

More articles from Earth Sciences:

nachricht Arctic melt ponds form when meltwater clogs ice pores
24.01.2017 | University of Utah

nachricht New Study Will Help Find the Best Locations for Thermal Power Stations in Iceland
19.01.2017 | University of Gothenburg

All articles from Earth Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Quantum optical sensor for the first time tested in space – with a laser system from Berlin

For the first time ever, a cloud of ultra-cold atoms has been successfully created in space on board of a sounding rocket. The MAIUS mission demonstrates that quantum optical sensors can be operated even in harsh environments like space – a prerequi-site for finding answers to the most challenging questions of fundamental physics and an important innovation driver for everyday applications.

According to Albert Einstein's Equivalence Principle, all bodies are accelerated at the same rate by the Earth's gravity, regardless of their properties. This...

Im Focus: Traffic jam in empty space

New success for Konstanz physicists in studying the quantum vacuum

An important step towards a completely new experimental access to quantum physics has been made at University of Konstanz. The team of scientists headed by...

Im Focus: How gut bacteria can make us ill

HZI researchers decipher infection mechanisms of Yersinia and immune responses of the host

Yersiniae cause severe intestinal infections. Studies using Yersinia pseudotuberculosis as a model organism aim to elucidate the infection mechanisms of these...

Im Focus: Interfacial Superconductivity: Magnetic and superconducting order revealed simultaneously

Researchers from the University of Hamburg in Germany, in collaboration with colleagues from the University of Aarhus in Denmark, have synthesized a new superconducting material by growing a few layers of an antiferromagnetic transition-metal chalcogenide on a bismuth-based topological insulator, both being non-superconducting materials.

While superconductivity and magnetism are generally believed to be mutually exclusive, surprisingly, in this new material, superconducting correlations...

Im Focus: Studying fundamental particles in materials

Laser-driving of semimetals allows creating novel quasiparticle states within condensed matter systems and switching between different states on ultrafast time scales

Studying properties of fundamental particles in condensed matter systems is a promising approach to quantum field theory. Quasiparticles offer the opportunity...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Sustainable Water use in Agriculture in Eastern Europe and Central Asia

19.01.2017 | Event News

12V, 48V, high-voltage – trends in E/E automotive architecture

10.01.2017 | Event News

2nd Conference on Non-Textual Information on 10 and 11 May 2017 in Hannover

09.01.2017 | Event News

 
Latest News

Arctic melt ponds form when meltwater clogs ice pores

24.01.2017 | Earth Sciences

Synthetic nanoparticles achieve the complexity of protein molecules

24.01.2017 | Life Sciences

PPPL physicist uncovers clues to mechanism behind magnetic reconnection

24.01.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>