2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2 From: Ross Pierre-Simon <Pierre-Simon.Ross@xxxxxxxxxxx> 2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2 KOMATIITIC TO RHYOLITIC EFFUSIVE TO EXPLOSIVE SUBMARINE VOLCANISM, ABITIBI GREENSTONE BELT *IUGG2019, post-conference fieldtrip * *Dates:* July 18 (morning) to July 23 (evening), 2019 *Primary leaders:* Pierre-Simon Ross,* Institut national de la recherche scientifique*, Lyndsay Moore, Rio Tinto *Co-leaders:* Michel Houlé (Geological Survey of Canada), Jean Goutier (*Ministère de lâ??Ã?nergie et des Ressources naturelles du Québec*) *Cost:* CAD $1475 including tax (equivalent to USD$1094, 982 euros, or AUD$1554) Includes transportation from Montreal and back, accommodation based on double occupancy, guidebook, breakfast and packed lunch (dinner is not included). *Requirements*: There will be walks up to two kilometres over flat to moderate terrain. Adequate footwear (hiking boots) is strongly recommended. Weather conditions could range from hot to cold and rainy, bring raingear and sun protection. Adequate health insurance is required. *Description: *The Abitibi greenstone belt in Quebec and Ontario (Canada) is one of the most coherent greenstone belts in the world and hosts some of the most pristine, Archean-aged remnants of submarine volcanic complexes. Despite the old age of the rocks (2.7 Ga), metamorphic grade and tectonic deformation are locally very low, and glacially polished outcrops can yield very nice exposures, with near-perfect preservation of volcanic textures. A six-day post-conference excursion (including four complete days in the field) will examine volcanic and intrusive facies ranging in composition from komatiitic (ultramafic) to rhyolitic. We will attempt to show both explosive and effusive products for each magma type. The excursion will include visits to: - the world-famous komatiitic lava flows at Spinifex Ridge and Pyke Hill, which include sheet flows, tube flows, and volcaniclastic rocks; - facies variations from massive to pillowed to hyaloclastite in basaltic lavas near Rouyn-Noranda, as well as a possible basaltic lava lake; - andesitic lavas and hyaloclastites in the Monsabrais area, including a possible block lava, pillows, and mass flows; - explosive andesitic products of the Dâ??Alembert tuff, ranging from thick coarse proximal beds to distal turbidites; - various felsic lavas and domes, including the rhyodacitic lavas and volcaniclastic rocks of the Glenwood flow complex. In addition to the varying submarine volcanic rocks, participants will also have the opportunity to view mineralization and alteration associated with the volcanogenic massive sulfide (VMS) deposits of the Noranda area. On the first evening, there will be an informal poster session where participants can present their own work on submarine volcanism, from modern to ancient. *Registration*: You can register for this fieldtrip even if you are not attending the IUGG conference. Go to http://iugg2019montreal.com/fieldtrips.html, click on the Abitibi fieldtrip, and follow the registration link at the bottom of the page. *Inquiries*: Please address any scientific inquiries to Pierre-Simon Ross ( rossps@xxxxxxxxxxx) and any administrative inquiries to secretariatiugg2019@xxxxxxxx He hope to see you there! ============================================================== Volcano Listserv is a collaborative venture among Arizona State University (ASU), Portland State University (PSU), the Global Volcanism Program (GVP) of the Smithsonian Institution's National Museum of Natural History, and the International Association for Volcanology and Chemistry of the Earth's Interior (IAVCEI). ASU - http://www.asu.edu/ PSU - http://pdx.edu/ GVP - http://www.volcano.si.edu/ IAVCEI - http://www.iavcei.org/ To unsubscribe from the volcano list, send the message: signoff volcano to: listserv@xxxxxxx, or write to: volcano-request@xxxxxxx. To contribute to the volcano list, send your message to: volcano@xxxxxxx. Please do not send attachments. ============================================================== ------------------------------
