PRESS-NEWS.org - Press Release Distribution
PRESS RELEASES DISTRIBUTION

Source of Galapagos eruptions is not where models place it

University of Oregon study finds plume to the southeast, explaining active volcanic activity in the islands

2014-01-21
(Press-News.org) Contact information: Jim Barlow
jebarlow@uoregon.edu
541-346-3481
University of Oregon
Source of Galapagos eruptions is not where models place it University of Oregon study finds plume to the southeast, explaining active volcanic activity in the islands

EUGENE, Ore. -- Images gathered by University of Oregon scientists using seismic waves penetrating to a depth of 300 kilometers (almost 200 miles) report the discovery of an anomaly that likely is the volcanic mantle plume of the Galapagos Islands. It's not where geologists and computer modeling had assumed.

The team's experiments put the suspected plume at a depth of 250 kilometers (155 miles), at a location about 150 kilometers (about 100 miles) southeast of Fernandina Island, the westernmost island of the chain, and where generations of geologists and computer-generated mantle convection models have placed the plume.

The plume anomaly is consistent with partial melting, melt extraction, and remixing of hot rocks and is spreading north toward the mid-ocean ridge instead of, as projected, eastward with the migrating Nazca plate on which the island chain sits, says co-author Douglas R. Toomey, a professor in the UO's Department of Geological Sciences.

The findings -- published online Jan. 19 ahead of print in the February issue of the journal Nature Geoscience -- "help explain why so many of the volcanoes in the Galapagos are active," Toomey said.

The Galapagos chain covers roughly 3,040 square miles of ocean and is centered about 575 miles west of Ecuador, which governs the islands. Galapagos volcanic activity has been difficult to understand, Toomey said, because conventional wisdom and modeling say newer eruptions should be moving ahead of the plate, not unlike the long-migrating Yellowstone hotspot.


ELSE PRESS RELEASES FROM THIS DATE:

Study finds decreased life expectancy for multiple sclerosis patients

2014-01-21
Study finds decreased life expectancy for multiple sclerosis patients (Boston) – The first large scale study in the U.S. on the mortality of patients with multiple sclerosis (MS) has been published and provides new information about the life expectancy ...

Arctic warmth unprecedented in 44,000 years, reveals ancient moss

2014-01-21
Arctic warmth unprecedented in 44,000 years, reveals ancient moss When the temperature rises on Baffin Island, in the Canadian high Arctic, ancient Polytrichum mosses, trapped beneath the ice for thousands of years, are exposed. Using radiocarbon dating, new research in Geophysical ...

Are anti-poaching efforts repeating the mistakes of the 'war on drugs'?

2014-01-21
Are anti-poaching efforts repeating the mistakes of the 'war on drugs'? Illegal poaching, fuelled by the demand for alternative 'medicines' and luxury goods in Asian markets, continues unabated. In response unprecedented levels of funding are being invested in enforcement, ...

Anti-swine flu vaccination linked to increased risk of narcolepsy in young adults

2014-01-21
Anti-swine flu vaccination linked to increased risk of narcolepsy in young adults Pandemrix is an influenza vaccination, created in 2009 to combat H1N1, known as Swine Flu. Now, a team of Swedish clinicians testing the vaccine for links to immune-related or neurological diseases ...

Older brains slow due to greater experience, rather than cognitive decline

2014-01-21
Older brains slow due to greater experience, rather than cognitive decline What happens to our cognitive abilities as we age? Traditionally it is thought that age leads to a steady deterioration of brain function, but new research in Topics in Cognitive Science argues that ...

Depressive symptoms linked to adult-onset asthma in African-American women

2014-01-21
Depressive symptoms linked to adult-onset asthma in African-American women (Boston) – According to a new study from the Slone Epidemiology Center (SEC) at Boston University, African-American women who reported high levels of depressive symptoms had ...

How to improve HPV vaccination rates? It starts with physicians, Moffitt researchers say

2014-01-21
How to improve HPV vaccination rates? It starts with physicians, Moffitt researchers say Consistent recommendations from family doctors lacking The risk of developing cervical cancer can be significantly decreased through human papillomavirus (HPV) vaccination. ...

Great Lakes evaporation study dispels misconceptions, need for expanded monitoring program

2014-01-21
Great Lakes evaporation study dispels misconceptions, need for expanded monitoring program ANN ARBOR—The recent Arctic blast that gripped much of the nation will likely contribute to a healthy rise in Great Lakes water levels in 2014, new research shows. But the processes ...

The brain's RAM

2014-01-21
The brain's RAM Rats, like humans, have a 'working memory' In computers it's called "RAM", but the mechanism is conceptually similar to what scientists call a "working memory" in the brain of humans and primates: when we interact ...

Vancouver: Nearby Georgia basin may amplify ground shaking from next quake

2014-01-21
Vancouver: Nearby Georgia basin may amplify ground shaking from next quake SAN FRANCISCO -- Tall buildings, bridges and other long-period structures in Greater Vancouver may experience greater shaking from large (M 6.8 +) earthquakes than previously ...

LAST 30 PRESS RELEASES:

Plastic in the soil, but not as we know it: Biodegradable microplastics rewire carbon storage in farm fields

Yeast proteins reveal the secrets of drought resistance

Psychiatry, primary care, and OB/GYN subspecialties hit hardest by physician attrition

New Canadian study reveals where HIV hides in different parts of the body

Lidocaine poisonings rise despite overall drop in local anesthetic toxicity

Politics follow you on the road

Scientists blaze new path to fighting viral diseases

The mouse eye as a window to spotting systemic disease

AI and the Future of Cancer Research and Cancer Care to headline October 24 gathering of global oncology leaders at the National Press Club: NFCR Global Summit to feature top scientists, entrepreneurs

FDA clears UCLA heart tissue regeneration drug AD-NP1 for clinical trials

Exploring the therapeutic potential of cannabidiol for Alzheimer's

We need a solar sail probe to detect space tornadoes earlier, more accurately, U-M researchers say

Acute myeloid leukemia (AML): Disease risk but not remission status determines transplant outcomes – new ASAP long-term results

Sperm microRNAs: Key regulators of the paternal transmission of exercise capacity

Seeing double: Clever images open doors for brain research

Inhaler-related greenhouse gas emissions in the US

UCLA Health study finds inhalers for asthma and COPD drive significant greenhouse gas emissions

A surgical handover system for patient physiology and safety

Cardiovascular health changes in young adults and risk of later-life cardiovascular disease

Nurse workload and missed nursing care in neonatal intensive care units

How to solve the remote work stalemate – dissertation offers tools for successful hybrid work

Chip-based phonon splitter brings hybrid quantum networks closer to reality

Texas Children’s researchers create groundbreaking tool to improve accuracy of genetic testing

Milken Institute, Ann Theodore Foundation announce more than $2.5 million in new funding for sarcoidosis research and launch new call for proposals

Boston University professor to receive 2025 Eugene Braunwald Academic Mentorship Award

Pusan National University researchers reveal how forest soil properties influence arsenic mobility and toxicity in soil organisms

Korea University researchers find sweet taste cells resist nerve damage through c-Kit protein

HealthFORCE, AAPA, and West Health release “Aging Well with AI” – first in a two part series on AI and the healthcare workforce

The real reasons Endurance sank — study finds Shackleton knew of ship’s shortcomings

Marine heatwaves have hidden impacts on ocean food webs and carbon cycling

[Press-News.org] Source of Galapagos eruptions is not where models place it
University of Oregon study finds plume to the southeast, explaining active volcanic activity in the islands