Geologic setting and iron oxide deposits of the Mesoproterozoic St. Francois Mountains, Southeast Missouri, USA – FT08 – CANCELLED

Leaders: Warren Day (United States Geological Survey), Cheryl Seeger (Missouri Geological Survey), Molly Starkey (Missouri Geological Survey), Thomas Schott (Doe Run Resource Corp), Anne McCafferty (United States Geological Survey)
Main Contact: wday@usgs.gov
Description: The field trip will focus on the regional geologic setting and nature of volcanism for the rocks that host the iron oxide-apatite (IOA) and iron oxide-copper-gold (IOCG) mineral deposits in the Mesoproterozoic St. Francois Mountain terrane of southeast Missouri, USA. The participants will examine drill core from several of the known deposits and visit outcrop examples of the least altered host rocks and the alteration mineral assemblages associated with the IOA and IOCG mineralizing systems. Newly acquired airborne aeromagnetic and radiometric geophysical data will be examined in the context of the regional geology to provide a holistic understanding of the rock type distribution, alteration, and location of known iron oxide ore deposits.
Dates: August 24th to August 29th, 2017
Starting Point: St-Louis, Missouri, USA
* Late afternoon departure from St. Louis in Missouri.
Ending Point: St-Louis, Missouri, USA
* Late morning arrival in St. Louis in Missouri on August 29th
Participants: 20 participants
Cost: $ 1700.00 CAD
* Includes ground transportation from and back to St. Louis in Missouri for the entire field trip, accommodation, lunches, and field trip guidebook.
** Breakfast and dinners are not included.
Tentative Itinerary

Day Topic/Site visited
August 24 Travel day from St. Louis to Rolla
August 25 McCracken core shed to see core from Boss, Bourbon, Pea Ridge, Iron Mountain deposits
August 26 Boss IOCG deposit drill core; Iron Mountain IOA deposit; Elephant Rocks State Park (Graniteville Granite)
August 27 Overview of the Pilot Knob deposit; Tour of US Civil War battlefield; Taum Sauk caldera sequence
August 28 Marble Creek Campground; Crane Mountain;  Grassy Mountain Ignimbrite; Knob Lick; Tiemann Shut-ins; IOCG-associated alteration along highway
August 29 Travel day from Pilot Knob to St. Louis airport for departure

Day Lecture Topics
August 24
August 25 Overview of the geology and metallogeny of the St. Francois Mountains (Day et al.)
August 26 Orientation on Boss deposit
August 27
August 28 Overview discussion on origin of IOCG deposits
 * Participants must provide proof of insurance coverage valid in Canada prior to participation in the field trip.
** All participants must sign a liability waiver form that will be provided by SGA prior to participation in the field trip.
*** All participants must verify if they need a Visa to enter in countries visited during the field trip.