Events
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JSG | BEG | UTIG | EPS |
De Ford Lecture Series: Pedro Di Nezio
Start:October 4, 2018 at 4:00 pm
End:
October 4, 2018 at 5:00 pm
Location:
JGB 2.324
UTIG Seminar Series: Athma Bhandari, UTIG
Start:October 5, 2018 at 10:30 am
End:
October 5, 2018 at 11:30 am
Location:
PRC ROC Room 1.603
Contact:
Anisa Abdulkader, aabdulkader@ig.utexas.edu, 512-471-8849
Host: Peter Flemings
UTIG Seminar Series: Anja Rutishauser, University of Alberta
Start:October 12, 2018 at 10:30 am
End:
October 12, 2018 at 11:30 am
Location:
PRC ROC Room 1.603
Contact:
Anisa Abdulkader, aabdulkader@ig.utexas.edu, 512-471-0417
Title: Discovery of a hypersaline subglacial lake complex beneath Devon Ice Cap, Canadian Arctic
Abstract: Two subglacial lakes have recently been identified from radio-echo sounding measurements underneath Devon Ice Cap in the Canadian Arctic. The presentation will begin with an introduction into how radar measurements can be used to identify subglacial water, and will then cover the discovery of the Devon subglacial lakes; including the challenges faced during data interpretation. Finally, why these lakes are compelling targets for further exploration and plans for future investigations of the Devon subglacial lakes will be discussed.
The subglacial lakes are located near the center of Devon Ice Cap, where basal ice temperatures are expected to be below -10.5 °C. This suggests that the lakes consist of brine-rich water with a significantly suppressed freezing point. The hypothesis of hypersaline water is supported by the surrounding geology demonstrating that a salt-bearing evaporite unit may outcrop underneath the ice and act as the salinity source for the brine.
The Devon subglacial lakes are not only the first lakes discovered in the Canadian Arctic, but also represent the first isolated hypersaline subglacial lakes on Earth. Their hypersaline nature makes these lakes particularly tantalizing analogs for brine pockets/bodies that are inferred to exist within Europa’s ice shell or beneath the Martian South Polar Layered Deposits.
Learn more about Anja Rutishauser.
Host: Don Blankenship
Alumni Reception during SEG in Anaheim
Start:October 16, 2018 at 5:00 pm
End:
October 16, 2018 at 7:00 pm
Location:
Morton's Steakhouse, 1895 South Harbor Street in Anaheim
Contact:
Kristen Tucek, ktucek@jsg.utexas.edu, 512.471.2223
De Ford Lecture Series: Andrea Dutton
Start:October 18, 2018 at 4:00 pm
End:
October 18, 2018 at 5:00 pm
Location:
JGB 2.324
UTIG Seminar Series: Alice-Agnes Gabriel, LMU Munich
Start:October 19, 2018 at 10:30 am
End:
October 19, 2018 at 11:30 am
Location:
PRC ROC Room 1.603
Contact:
Anisa Abdulkader, aabdulkader@ig.utexas.edu, 512-471-0417
Title: Dynamic viability of the 2016 Mw 7.8 Kaik?ura earthquake cascade on weak crustal faults
Abstract: The Mw 7.8 Kaik?ura earthquake struck New Zealand’s South Island on November 14, 2016. This event, considered the most complex rupture observed to date, caused surface rupture of at least 21 segments of the Marlborough fault system, some of them previously unknown. Puzzling features inferred from high-quality observations include a large gap separating surface rupture traces, the possibility of significant slip on the subduction interface, and slow apparent rupture speed. Here I present a dynamic rupture model to unravel the event’s riddles in a physics-based manner. The model reproduces key characteristics of the event and provides insights on the mechanical viability of competing hypotheses proposed to explain them. I show that the observed rupture cascade, involving strike and thrust faulting, is dynamically consistent with regional stress estimates and a crustal fault network geometry inferred from seismic and geodetic data. The rupture propagation requires a linking low-dipping shallow thrust fault, but not slip on an underlying megathrust. The complex fault system operates at low apparent friction thanks to the combined effects of over pressurized fluids, low dynamic friction and stress concentrations induced by deep fault creep. Our results associate the non-rupture of the Hope fault, one of the fundamental riddles of the event, with unfavourable dynamic stresses on the restraining step-over formed by the Conway-Charwell and Hope faults.
Learn more about Alice-Agnes Gabriel.
Host: Thorsten Becker
De Ford Lecture Series: Douglas Edmonds
Start:October 25, 2018 at 4:00 pm
End:
October 25, 2018 at 5:00 pm
Location:
JGB 2.324
UTIG Seminar Series: Michael Tetley, Lyon
Start:October 26, 2018 at 10:30 am
End:
October 26, 2018 at 11:30 am
Location:
PRC ROC Room 1.603
Contact:
Anisa Abdulkader, aabdulkader@ig.utexas.edu, 512-471-0417
Title: Towards a more quantitative description of plate tectonics
Abstract: The development of plate tectonic theory has fundamentally shaped our understanding of Earth’s surface, providing a framework to describe first-order geological observations of continental motion and crustal evolution. An essential component of this has been the development of self-consistent plate reconstructions describing the time-dependent spatial configuration of Earth’s paleogeography on both global and regional scales. In this talk, I will be presenting the current progress of an ongoing body of work towards the development of two new frameworks designed to derive quantitative time-dependent plate reconstructions with a focus on the identification of component tectonic properties and their associated time-dependent uncertainties. For the past ~200 Ma, plate models are typically derived through a combination of observations of relative seafloor spreading histories and continental geology, with deep-time reconstructions constrained primarily using paleomagnetic data. Coupled with a spatio-temporally incomplete geological record, plate motions are often constrained by linear interpolation and qualitative interpretation of data, at times producing seemingly unphysical global and regional plate and boundary dynamics. To address this long-standing challenge, we focus on evaluating the underlying absolute plate motion (APM) model, employing an inverse approach able to explore a range of geodynamically consistent APM solutions for a given plate reconstruction whilst quantifying the time-dependent contributions of each individual tectonic component. Experiments jointly characterizing the time-dependent properties of global net lithospheric rotation (NR) with respect to the lower mantle, trench migration (TM) and RMS plate velocities (VRMS) for the past 220 Ma provide insight into discriminating constituent components of the global tectonic system. Results indicate NR as the most dominant individual component, with models constrained by this criteria alone able to fit global observations including the prediction of hotspot tracks.
Learn more about Michael Tetley.
Host: Thorsten Becker
Hot Science - Cool Talk "Fire Ants, Crazy Ants & Zombie Ants"
Start:October 26, 2018 at 7:00 pm
End:
October 26, 2018 at 8:15 pm
Location:
Student Activity Center (SAC), UT Campus
Contact:
Didey Montoya, didey@austin.utexas.edu, 5124714211
View Event
The red imported fire ant is an invasive species in Texas that can produce life-threatening allergic reactions in people, has major costs to agriculture, and causes severe impacts to native fauna. Dr. Rob Plowes shares insights into fire ant behavior and discusses a remarkable biological control opportunity. Dr. Plowes researches one of the fire ant’s deadliest enemies – tiny phorid flies, which actually turn ants into zombie-like living incubators for their offspring! He also describes research approaches to other invasive species in Texas. We invite you to join us for a special Halloween celebration. Participate in our costume contest: come as your favorite creature or zombie!
UTIG Brown Bag Seminar: Jennifer Harding
Start:October 31, 2018 at 12:00 pm
End:
October 31, 2018 at 1:00 pm
Location:
PRC ROC Room 1.603
Contact:
Brandon Shuck, brandon.shuck@utexas.edu
Informal weekly presentations by UTIG students and researchers. Bring your lunch!
This week: Variation of oceanic crust at the Mid- Cayman Spreading Center from seismic amplitude and gravity modeling
Speaker page: Jennifer Harding
UTIG Seminar Series: Melisa Diaz, The Ohio State UniversityMarch, 29 2024Time: 10:30 AM - 11:30 AMLocation: PRC 196/ROC 1.603 Speaker: Melisa Diaz, Assistant Professor, The Ohio State University Host: Benjamin Keisling Title: Biogeochemistry of a Greenland Ice-Marginal Lake Abstract: Due to polar amplification, nearly every glacier in Greenland has thinned and/or retreated in recent decades. The meltwater generated from these glaciers can take several paths, ultimately discharging into coastal waters or stored in closed-basin lakes. Ice-marginal lakes are a common but poorly understood feature in many glaciated regions, including Greenland. The lakes receive freshwater input from a combination of subglacial, supraglacial, terrestrial and meteoric sources, and a subset periodically drain, resulting in the rapid discharge of large volumes of water downstream (glacial lake outburst floods – GLOFs). In the case of drainages under adjacent marine terminating glaciers, GLOFs can deposit large amounts of sediment, nutrients, and freshwater directly into coastal waters and fjords. Lake Tininnilik, a large (~40 km2) ice-marginal lake that forms along Saqqarliup Glacier in west Greenland, drains ~2 km3 on quasi-cyclic decadal timescales into Saqqarleq Fjord to the north. For this talk, I will discuss the first comprehensive biogeochemical analysis of Lake Tininnilik and its potential influence on coastal primary productivity, including its major and minor nutrient stoichiometry and microbial composition. As the climate continues to warm, GLOFs are expected to become more frequent in Greenland. Therefore, it is imperative that we understand how these events can impact coastal community resilience. |
UTIG Discussion Hour: Kaitlin Schaible (UTIG)April, 02 2024Time: 2:00 PM - 3:00 PMLocation: ROC 2.201 |
UTIG Seminar Series: Chuanming Liu, UT AustinApril, 05 2024Time: 10:30 AM - 11:30 AMLocation: PRC 196/ROC 1.603 Speaker: Chuanming Liu, Distinguished Postdoctoral Fellow, UT Jackson School of Geosciences, Postdoctoral Fellow, University of Texas Institute for Geophysics Host: Thorsten Becker |
UTIG Discussion Hour: Soraya Alfred (UTIG)April, 09 2024Time: 2:00 PM - 3:00 PMLocation: ROC 2.201 |
UTIG Seminar Series: Tanner Miller, UTIGApril, 12 2024Time: 10:30 AM - 11:30 AMLocation: PRC 196/ROC 1.603 Speaker: Tanner Miller, Postdoctoral Fellow, University of Texas Institute for Geophysics Host: Peter Flemings |
UTIG Seminar Series: Crispin Little, University of LeedsApril, 12 2024Time: 2:00 PM - 3:00 PMLocation: PRC 196/ROC 1.603 Join us for a special seminar with Professor Cris Little. Speaker: Crispin Little, Professor, School of Earth and Environment, University of Leeds Host: Rowan Martindale Title: Biotic response to environmental perturbations in the Pliensbachian and Toarcian stages of the Lower Jurassic Abstract: The Lower Jurassic period was characterized by instability in global climate, with alternating greenhouse and icehouse states, and episodes of widespread oxygen depletion in the shallow marine environment. These episodes of oxygen depletion are marked by frequent intervals of increased organic carbon preservation in shallow marine sediments. The Pliensbachian stage of the Lower Jurassic was characterised by significantly cooler global temperatures than the preceding Sinemurian, and the following Toarcian stages, and ended with an extinction event (notably for ammonites) at the Pliensbachian-Toarcian boundary (Pl-To) ca. 184.2 Ma. About one Myr later the Toarcian Oceanic Anoxic Event (T-OAE) is characterized Corg rich black shale successions, particularly well developed in sedimentary basins in NW Europe, which display a negative ?13Corg excursion of -5 to -6‰, lasting 0.5 to 1.5 Myr. This excursion has been tied to a disruption of the global exogenic carbon cycle, but the ultimate source of the injected 12C is a matter of debate, with suggestions including methane hydrates, thermogenic methane produced by volcanism in the Karoo-Ferrar Large Igneous Province (LIP), wetlands, and permafrost destabilisation. The onset of the T-OAE in many (but importantly not all) sections is intimately linked to an extinction event that especially impacted the marine benthic macrofauna, but left the nekton largely unaffected. The recovery from this event is not well studied, but in one site, the Cleveland Basin of North Yorkshire, UK, although species richness recovered markedly as soon as environmental conditions ameliorated, other metrics of functional diversity and community structure did not attain pre-extinction levels until much later, some five million years after the extinction event. The talk will be of interest to those working on macroevolution, paleontology, and the effect of large scale climate change on marine ecosystems. |
UTIG Discussion Hour: Medha Prakash (UTIG)April, 16 2024Time: 2:00 PM - 3:00 PMLocation: ROC 2.201 |
UTIG Seminar Series: Emma \"Mickey\" MacKie, University of FloridaApril, 19 2024Time: 10:30 AM - 11:30 AMLocation: PRC 196/ROC 1.603 Speaker: Emma \"Mickey\" MacKie, Assistant Professor, Geological Sciences, University of Florida Host: John Goff |
Master\'s Thesis PresentationsApril, 19 2024Time: 2:00 PM - 5:00 PMLocation: JGB The Master of Science (MS) degree at the Jackson School of Geosciences is considered to be the professional degree for a career in the Geosciences. This degree is the foundation for students pursuing employment in the petroleum industry, environmental and hydrogeological fields, state and federal government agencies, and other related geoscience fields. Some students also use the MS degree as preparation for pursuing a Ph.D. The Energy & Earth Resources Interdisciplinary program provides the opportunity for students to prepare themselves in management, finance, economics, law and policy leading to analytical and leadership positions in resource-related fields. The private sector and government organizations face a growing need for professionals that can plan, evaluate, and manage complex resource projects, commonly international in scope, which often include partners with a variety of professional backgrounds. As requirements for these degrees, students must present a professional talk on Master\'s Thesis Presentations. |
Planetary Habitability Seminar SeriesApril, 22 2024Time: 1:00 PM - 2:00 PMLocation: PMA 15.216B UT Center for Planetary Systems Habitability Seminar Series. See website for speaker schedule and more details: View Events Join remotely: https://utexas.zoom.us/j/94052130734 In person: Classroom 15.216B, Physics, Math and Astronomy Bldg. UT Austin, Department of Astronomy 2515 Speedway, Stop C1400 Austin, Texas 78712-1205 |
UTIG Discussion Hour: Nicholas Montiel - PhD Talk (UTIG)April, 23 2024Time: 2:00 PM - 3:00 PMLocation: ROC 2.201 |
UTIG Seminar Series: Cornelia Rasmussen, UTIGApril, 26 2024Time: 10:30 AM - 11:30 AMLocation: PRC 196/ROC 1.603 Speaker: Cornelia Rasmussen, Research Associate, University of Texas Institute for Geophysics Host: Krista Soderlund |
Planetary Habitability Seminar SeriesApril, 29 2024Time: 1:00 PM - 2:00 PMLocation: PMA 15.216B UT Center for Planetary Systems Habitability Seminar Series. See website for speaker schedule and more details: View Events Join remotely: https://utexas.zoom.us/j/94052130734 In person: Classroom 15.216B, Physics, Math and Astronomy Bldg. UT Austin, Department of Astronomy 2515 Speedway, Stop C1400 Austin, Texas 78712-1205 |