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Helicopter magnetic and gravity gradiometry survey over the Pea Ridge iron mine and surrounding area, southeast Missouri, 2014 High resolution magnetic and gravity gradient data were collected using the HeliFalcon airborne gravity gradiometry system together with a stinger-mounted magnetometer. The survey took place out of the Sullivan, Missouri airport during March of 2014. The survey covers a 35 x 37 square-kilometer area centered on the Pea Ridge iron oxide-apatite rare-earth element deposit, which is located about halfway between the towns of Sullivan and Potosi, Missouri. Data were collected along north-south flight lines spaced 400 m apart with east-west tie lines flown every 4000 m. A nominal flight height above terrain of 80 m was maintained except where safety dictated a higher elevation. A total of 3538 line km of data were collected.... Categories: Data; Types: Citation; Tags: Bourbon, Missouri, Pea Ridge Mine, Sullivan, Sullivan Regional Airport, All tags... USGS Science Data Catalog (SDC), aeromag, aeromagnetic, aeromagnetic surveying, airborne gravity gradiometry, airborne magnetic survey, geophysics, geoscientificInformation, geospatial datasets, gravimeter measurement, gravimetric methods, gravitational field (earth), gravity field, magnetic field (earth), magnetic surveying, Fewer tags In situ U-Pb dating of apatite and rutile from St. Francois Mountains IOA and IOCG deposits, southeast Missouri Apatite (Ca5(PO4)3(Cl/F/OH)) and rutile (TiO2) samples were collected by the U.S. Geological Survey (USGS) from the iron oxide-apatite-rare earth element (IOA-REE) and iron oxide-copper-gold (IOCG) deposits hosted by the Mesoproterozoic, St. Francois Mountains terrane, southeast Missouri. Samples were prepared and analyzed for direct age dating on a laser ablation inductively coupled plasma mass spectrometer (LA-ICP-MS) system at the USGS in Denver, Colorado from May 2016 to June 2019. Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Boss-Bixby, Bourbon, Crawford County, Dent County, Franklin County, All tags... GGGSC, Geochemistry, Geology, Geophysics, and Geochemistry Science Center, Iron County, Kratz Spring, LA-ICP-MS, MRP, Mineral Resources Program, Pea Ridge, Pilot Knob, Saint Francois County, U-Pb, U.S. Geological Survey, USGS, USGS Science Data Catalog (SDC), Washington County, apatite, geochronology, geoscientificInformation, laser ablation inductively coupled plasma mass spectrometer, lead, mineral deposits, rutile, southeast Missouri, thorium, uranium, uranium-lead analysis, Fewer tags