SDSU Geological Sciences Webinar - Larry Buchanan

submitted by: tcarrasc
Geology of the San Cristobal Deposit Dr. Buchanan earned his PhD in Economic Geology in 1979 and taught university level geology for several years before the romance of prospecting drew him back to the field. After several notable gold and silver discoveries, he capped his career in 2006 by winning the coveted Thayer Lindsley Award for the San Cristobal silver discovery. Larry will talk about that Discovery. He will also describe the transformation of the village and living conditions...

SDSU Geological Sciences - Thesis Defense - Carrie Welker

submitted by: tcarrasc
No evidence for seawater-derived crustal contamination at Loihi Seamount from trace metal abundances and oxygen isotope ratios Carrie Welker Advisor Dr. Aaron Pietruszka ABSTRACT Loihi Seamount is the youngest Hawaiian volcano. It towers ~3 km above the seafloor to within ~1 km of sea level. A previous study found elevated (234U/238U) ratios in sixteen Loihi volcanic glass samples. The expected value of (234U/238U) in primary magmas derived from the mantle is 1.000, but seawater's...

SDSU Geological Sciences - Thesis Defense - Steven Warner

submitted by: tcarrasc
Geochemistry and Petrogenesis of mid- Miocene Volcanoes from the Ancestral Cascades of Northeastern California Steven Warner ABSTRACT Several well-preserved, mid- to late Miocene volcanoes in northeastern California could well have an origin associated with the late Tertiary development of the ancestral Cascades volcanic arc. To assess this possibility, we have analyzed seventeen samples from the Spanish Springs Peak volcano and ten additional samples from four nearby volcanoes for...

SDSU Geological Sciences Webinar - Brandon Browne

submitted by: tcarrasc
Magma Mixing in 'Real-Time': A Case Study of the 2006 Eruption of Augustine Volcano, Alaska Brandon Browne Department of Geological Sciences California State University, Fullerton Wednesday, April 27th, 2011 -------------------------------------------------------------------------------- Abstract: The frequency and dynamic nature of volcanic eruptions are strongly influenced by a variety of open-system processes that exemplify subvolcanic plumbing systems in island arc volcanoes,...

SDSU Geological Sciences - Thesis Defense - Daniel Heaton

submitted by: tcarrasc
Short magma residence times for Kilauea Volcano based on high-precision Pb isotope ratios Daniel Heaton M.S. Candidate Department of Geological Sciences San Diego State University Advisor Dr. Aaron Petruszka Monday, April 25th, 2011 CSL 422, 2:00pm -------------------------------------------------------------------------------- ABSTRACT We present new high-precision Pb isotopic analyses of 46 historical Kilauea summit lavas (1823-2008). These data are used here to investigate...

SDSU Geological Sciences Webinar - Stephen Self

submitted by: tcarrasc
Super-eruptions: Volcanic Activity with a Global Impact; Stephen Self, Volcano Dynamics Group, Department of Earth Science, The Open University, Senior Volcanologist, US NRC - Every now and again, Earth suffers from tremendous explosive volcanic eruptions, much bigger than those witnessed in modern times. Although the return period for such events is long, perhaps every 10-100,000 years depending on the size, it is statistically more likely that Earth will next experience a large...

Seething History

A Scripps team captures gases emitted from Iceland's volcanoes to plumb the island's geologic roots and address hot scientific debates.

Seething History

submitted by: ucsandiego

A Scripps team captures gases emitted from Iceland's volcanoes to plumb the island's geologic roots and address hot scientific debates.

http://explorations.ucsd.edu/Features/2009/Seething_History/

Earth's Outlook from Above

Fifty years after Sputnik, satellites peering down on Earth have become valuable scientific tools to study the global environment and offer much needed insight into the future of our planet.

Amazing Earth 1

submitted by: scivee-team

A documentary about volcanic eruptions, their causes and effects on Earth and the geological implications of those events in history and in the future - Part 1.