Date: Tuesday, January 7, 2020 — Thursday, January 9, 2020
Web: https://www.plymouth.ac.uk/whats-on/volcanic-and-magmatic-studies-group-...
All enquiries: events@plymouth.ac.uk
Date: Monday, March 2, 2020 — Sunday, March 8, 2020
Includes the following symposia:
6.2. Deccan volcanism and its role in mass extinction and paleobiodiversity
Convenors: Gerta Keller (gkeller@princeton.edu), N Malarkodi (nallamuthumalarkodi@gmail.com)
Extinction events are important factors in the history of life on Earth, and many studies suggest catastrophic causes for at least some major mass extinctions. Two types of catastrophic event have been invoked: major impacts by asteroids or comets and episodes of continental flood basalt volcanism. Of the five major mass extinctions in Earth’s history, only the Cretaceous–Tertiary (K–T) mass extinction has been positively linked to an asteroid impact/ continental flood basalts (CFB), Over the past decade continental flood basalts (CFB) have been correlated with most major mass extinctions leading to suggest that this may be the general cause of mass extinctions. The symposium will cover various aspects on volcanism and its role in mass extinction and paleobiodiversity and the key note addresses are arranged besides technical sessions.
16.1. Large igneous provinces and their plumbing systems
Convenors: Rajesh Srivastava (rajeshgeolbhu@bhu.ac.in), Richard Ernst (richard.ernst@ernstgeosciences.com)
This symposium intends to discuss the temporal and spatial distribution of LIPs, their origin and links to mantle plumes, mafic dykes and dyke swarms, superplume events, supercontinent reconstructions, climate changes (including mass extinctions) and associated metallogeny.
Date: Monday, March 9, 2020 — Tuesday, March 10, 2020
Web: https://www.geosociety.org/GSA/Events/Section_Meetings/GSA/Sections/sc/2020mtg/home.aspx
Includes the following sessions:
T11. Mass extinction in Earth history: new insights from paleobiological, geochemical, and modeling studies of mass extinction events
Convenors: Arne Winguth (awinguth@uta.edu)
This session features recent research of sedimentary, geochemical, paleobiological, and paleogeographical records and modeling studies to improve the understanding of mass extinctions in Earth’s history. We seek contributions from all earth-science fields, including studies from sedimentary sections, developments of geochemical techniques, biogeochemical and climate modeling investigations, and syntheses.
Date: Sunday, May 3, 2020 — Friday, May 8, 2020
Includes the following sessions:
SM4.4. Hotspots, LIPs and LLSVPs: a global investigation with joint constraints from geochemistry, seismology and geodynamics
Convenors: Maria Tsekhmistrenko (maria.tsekhmistrenko@gmail.com), Eva Bredow (eva.bredow@gfz-potsdam.de), Juliane Dannberg (juliane.dannberg@ufl.edu)
Seismic tomography images large low-velocity provinces (LLVPs) at the core-mantle boundary (CMB), deep mantle plumes, and the connection between them. Geochemistry provides constraints on the age and nature of the material sampled by plumes. Geodynamic modelling suggests interaction of subducting slabs with low-velocity piles at the CMB and traces the geographical source of erupted material. What is needed now is to combine approaches and confront observations from the different fields to build a clear picture of the link between deep structures and surface expressions in volcanoes.
This session aims to bring together scientists from these different fields to better constrain the complex processes in the mantle at all depths with a focus on mantle plumes. We invite contributions from (1) seismic observations and seismic tomography models of mantle plumes and LLSVPs. (2) geodynamic modelling on the origin of LLSVPs and their connection to mantle plumes. (3) tectonic studies with new data (or old data with new flavour). (4) geochemical and petrological studies constraining the nature and evolution of thermochemical plumes. (5) all studies that use novel data collection and visualization techniques to further understand deep mantle structures and their connections to the surface observables.
SSP2.14. Volcanism, impacts, and extinctions: links between deep time and the Anthropocene
Convenors: Thierry Adatte (thierry.adatte@unil.ch), David Bond (d.bond@hull.ac.uk), Alicia Fantasia (alicia.fantasia@unil.ch), Sverre Planke (planke@vbpr.no), Nicolas Thibault (nt@ign.ku.dk)
We are presently facing the 6th mass extinction, what can be learnt from the past?
The session will focus on the six major Phanerozoic mass extinctions including the Anthropocene one, but contributions from other environmental crises (e.g. OAEs, PETM) are also welcome.
Date: Wednesday, May 13, 2020 — Thursday, May 14, 2020
Web: https://www.lakesuperiorgeology.org/
Date: Monday, May 18, 2020 — Tuesday, May 19, 2020
Web: https://www.geosociety.org/GSA/Events/Section_Meetings/GSA/Sections/nc/2020mtg/home.aspx
Includes the following sessions:
T2. Intrusive rocks of the Midcontinent Rift
Convenors: Joshua Feinberg (feinberg@umn.edu), Nicholas Swanson-Hysell (swanson-hysell@berkeley.edu), Mark Severson
Intrusive rocks associated with the Midcontinent Rift System preserve a remarkable record of tectonic and magmatic processes within the interior of Laurentia. This session seeks to highlight new geological, geochemical, petrologic, and geophysical research into the rift that is expanding our understanding of rift formation, Proterozoic earth history, and mineralization. New geochronologic and geochemical data are revealing insights into mantle dynamics during the rift’s formation and the changing nature of intrusions through the rift’s history. Field, geophysical survey, and mineral fabric studies offer new clues to intrusive emplacement mechanisms and timing. Significant mineralization within the rift continues to be a focus of exploration and research. Paleomagnetic studies continue to enhance chronostratigraphic correlations and reveal new insights into Laurentia’s paleogeography throughout the rift’s evolution. Here in the eponymous city of the Duluth Complex, we will discuss the extended and spectacular magmatic history recorded by intrusive rocks of the Midcontinent Rift.
T6. Deciphering the record of Lake Superior iron formations
Convenors: Athena Eyster (aeyster@mit.edu), Latisha Brengman (lbrengma@d.umn.edu), Chad Wittkop (chad.wittkop@mnsu.edu)
Ever since they were first discovered, the Precambrian banded iron formations of the Lake Superior region have fascinated scientists around the world. The geological, geochemical, and geobiological importance of these unique formations continue to be explored and deciphered. We welcome contributions that present new datasets and interpretations of the ancient Lake Superior iron formations, as well as those that utilize experiments, modeling, or modern analogs to explore the genesis of iron-rich sediments.
Date: Sunday, May 24, 2020 — Thursday, May 28, 2020
Web: http://www.jpgu.org/meeting_e2020/
Includes the following sessions:
S-IT32. Do plumes exist?
Convenors: Hidehisa Mashima (hisa.mashima@mbn.nifty.com), Gillian Foulger (g.r.foulger@durham.ac.uk), Dapeng Zhao (zhao@tohoku.ac.jp)
The debate regarding whether anomalous volcanic areas on Earth's surface are fed by deep-mantle plumes is widely considered to be the most significant debate currently ongoing in Earth science. Not only does the debate touch on a fundamental aspect of how Earth works dynamically, but the subject is extraordinarily cross-disciplinary to an extent that probably few scientists fully realize. Sub-disciplines that can contribute to efforts to resolve the debate include sedimentology, palaeontology, tectonophysics, geochronology, volcanology, petrology, geochemistry, geothermal research, seismology, geodesy, electromagnetics and many others.
In addition to the disciplines of Earth science, the plume debate provides a remarkable and thought-provoking subject for scientific philosophy and reflections on correct scientific methodology: (1) What exactly is a plume? People often change their definition of a plume a posteriori in order to fit their observations. (2) How can the plume- or the plate hypothesis be falsified? (3) Do Earth scientists tend to present only one possible interpretation of their data, or do papers reflect all possible interpretations? Unfortunately, the former is often the case. (4) Are published interpretations consistent with other data from the subject field area? Often they are not, and the inconsistencies are not sufficiently highlighted nor discussed. These issues are particularly useful for inducting students into correct scientific working. In summary, the debate provides enormously fertile ground for new, fundamental questions and cross-disciplinary research.
This session welcomes studies of melting anomalies on Earth from the point of view of any sub-discipline. We also welcome studies of geological phenomena which are attributed to mantle plumes, such as back-arc extension, plate motion, sedimentary basin formation and lithospheric uplift, and any other work that bears on this fascinating and challenging geological debate.
S-MP37. Supercontinents and crustal evolution
Convenors: Madhusoodhan Satish-Khan (satish@geo.sc.niigata-u.ac.jp), Krishnan Sajeev (sajeev@ceas.iisc.ernet.in), Tomokazu Hokada (hokada@nipr.ac.jp), Yasuhito Osanai (osanai@scs.kyushu-u.ac.jp)
Supercontinent formation and dispersion has been enigmatic in the Earth's history. Eurasia is one such current supercontinent and incredible progress in the understanding of its geological evolution has been achieved in the past decades. Earlier supercontinents in the Earth's history such as Gondwana (0.5 Ga), Rodinia (1.0 Ga), Columbia/Nuna (2.0 Ga), Kenorland (2.5 Ga) and Vaalbara (3.1 Ga), have been the focus of several studies, however limited information on older supercontinents has restricted in understanding their tectonic evolution. Several important unsolved issues remain, such as how, when and where these supercontinents formed and how long they remained as such before breaking apart. Additional questions arise on the processes that triggered the fragmentation and unification of continents. In this session, we invite authors around the world to present original new data as well as review results on the continental scale crustal processes and tectonic evolution that are associated with supercontinent formation events in Earth's history. The well-studied Eurasia and Gondwana supercontinents are of particular focus. Topics of interest include, but not restricted to, extremes in metamorphism, P-T-d-t evolution, magmatism, and the role of fluids. We hope to provide a platform for scientific discussions that will enlighten our understanding of the physical and chemical processes in the continental crust that records episodes of orogenesis that contributed to the formation and evolution of supercontinents.
Date: Sunday, June 21, 2020 — Friday, June 26, 2020
Web: https://goldschmidt.info/2020/index
Includes the following sessions:
09b: Large Igneous Provinces, perturbations in biogeochemical cycles and mass extinctions through Earth history
Convenors: Richard Ernst (richard.ernst@ernstgeosciences.com), Ying Cui (cuiy@montclair.edu), Yogaraj Banerjee (ybanerjee15@gmail.com), Prosenjit Ghosh (pghosh@iisc.ac.in)
There is an increasing recognition of the role of Large Igneous Provinces (LIPs) in major environmental perturbations and mass extinction events in Earth history. LIPs can affect the atmosphere and ocean through a wide array of processes including, but not limited to, carbon cycle perturbations, global warming, global cooling, acid rain, ash clouds, and enhanced hydrothermal and terrestrial nutrient fluxes. Some of these factors, in return, can lead to mass extinctions through eg. ocean anoxia and acidification and mercury poisoning. However, our current understanding of the connections between LIPs, environmental change, and mass extinctions is incomplete in many ways. The goal of this session is to bring together researchers approaching this problem from multiple perspectives. We welcome contributions that show: (1) geological, geochemical evidences of LIPs throughout geological time; (2) geochronological constraints on LIPs, (3) the interactions between the effects (direct and indirect) of LIPs and climatic change, (4) reconstructing changes in global weathering regime across the LIPs, (5) spatiotemporal constraints on marine chemical conditions (e.g., redox conditions, and ocean acidification) from inorganic and organic proxies and linked to LIPs; (6) investigations of causal links between LIPs, environmental conditions, and the diversity and ecological structure of marine ecosystems during mass extinctions and subsequent recoveries. (7) we also invite contributions unraveling biogeochemical processes during extinction events related to LIPs using proxies including (but not limited to) trace elements, conventional and non-conventional stable isotopes, radioisotopes, clumped isotopes, biomarkers and modeling studies.
03d: Examining mantle sources and magmatic processes through the geochemistry of intraplate and hotspot magmas
Convenors: Angus Fitzpayne (angus.fitzpayne@erdw.ethz.ch), Laura Miller (laura.miller@anu.edu.au), Edward Marshall (edmarshall4@utexas.edu), Michael Bizimis (mbizimis@geol.sc.edu)
Intraplate volcanism in continental and oceanic regions provides constraints on the composition and evolution of the mantle through time. The wide variety of geochemical and isotopic signatures in intraplate magmas is a window into the diverse world of mantle heterogeneity and chemical transport within the Earth. Additionally, the specific nature of production and evolution of intraplate melts is still uncertain particularly in cratonic environments. This session will focus on the latest developments in the study of hotspot and intraplate magmas and their mantle sources, with applications to metasomatism, crustal recycling, mantle heterogeneity, melt generation, and other topics on the behavior and evolution of Earth’s interior. We welcome contributions that examine the petrology, mineralogy, redox state, trace element and isotope geochemistry of basalts, kimberlites, lamprophyres, and other melts that teach us about the mantle sources and magmatic evolution of hotspot and intraplate magmas.
Date: Monday, August 31, 2020 — Saturday, September 5, 2020
Web: https://www.ksc.ru/en/90years/magmatism/
Organising committee email: alkaline2020@ksc.ru