Recent News - stories from the last 14 days.
For information about a story, contact Ann Tihansky (202) 208-3342.
First observation of gold particles in hot hydrothermal fluids
For the first time, scientists have found gold particles in boiling fluids from a hydrothermal vent. USGS scientist Amy Gartman and coauthors published their discovery in the journal Geology
. Gold is one of the metals in hydrothermal vent deposits that may make mining them economical. The discovery of gold colloids—particles smaller than 1 micron (a human hair is about 60 microns in diameter) suspended in seawater—will advance understanding of how, and how fast, seafloor gold deposits form. Gartman and colleagues collected the colloids from hydrothermal fluids at Niua volcano in the South Pacific on a 2016 Schmidt Ocean Institute cruise
. Gold colloids are widely used in biomedicine and technology and have long been hypothesized to exist in natural fluids. This study is the first to find them in hydrothermal fluids. Contact: Amy Gartman, firstname.lastname@example.org
, 831-460-7562. Photo credit: Schmidt Ocean Institute, ROV ROPOS
Open House at the Pacific Coastal and Marine Science Center in Santa Cruz
From 11 a.m. to 4 p.m. on Saturday, December 9, USGS scientists treated visitors to displays about their research at the Pacific Coastal and Marine Science Center
in Santa Cruz, California. We had interactive exhibits, video and photo displays, posters, deep-sea rocks and minerals, oceanographic equipment, and colorful handouts. Our first open house in 13 years, visitors poured in to the courtyard and lobby at 2885 Mission Street
to learn about our science as part of the “Holiday Bazaar at the Wrigley Building
.” Contact: Rex Sanders, email@example.com
Read about the Open House in the Santa Cruz Sentinel!
Physical processes dominate channel evolution in Olympic National Park rivers--A reply
A team of federal scientists addressed comments from researchers who disagree with their conclusions that river channel evolution is driven primarily by physical factors rather than an overabundance of elk after wolf eradication. The team, led by USGS geologist Amy East, does not dismiss the influence of elk on river-bank vegetation, but contend that the weight of evidence indicates floods and other physical drivers have dominated the change in river channels during the last 70 years while biological drivers are secondary. The disagreement highlights the difficulties of determining the causes of ecological change in a complex world. Read the original paper
and the reply
. Contact: Amy East, firstname.lastname@example.org
, 831-460-7533, and Kurt Jenkins, email@example.com