3 was composed of brecciated limestone or crackled limestone cemented by 4-millimeter-thick bands of purple fluorite and calcite, with the percentage of fluorite increasing at 2,000 feet. Dome apparently developed during its formation. in the structural evolution of the region. 1920, J. Weller et al. The roughly circular dome has prominent topographic Most geologists who have studied Hicks Dome in southern Illinois, interpret it as the product of one or more underground explosions and is defined as a cryptoexplosive or cryptovolcanic feature (Nelson, 1995, Structural features in Illinois, Bulletin 100). 2 . It formed during the Permian, about 270 million years ago. The Hicks Dome, a Permian crypto-volcanic feature (?) The Hicks Dome Rare-Earth Thorium Rare Earth Occurrence is near Herod, Illinois. there is evidence that the Hicks Dome is of volcanic origin. The answer isIllinois! Drilling into the core of Hicks Dome reveals greatly shattered sedimentary rocks, intermixed with igneous material. This phenomenon was responsible for the fluorspar, zinc, lead, and silver that is found in the area. (Solved! Bastin, E.S., 1931, The fluorspar deposits of Hardin and Pope Counties, Illinois: Illinois Geological Survey, Bulletin 58, 116 p. Baxter, J.W., G.A. A lock () or https:// means youve safely connected to the .gov website. However, slightly elevated values of copper and rare earth elements were suggested. The possibility is suggested that this could have been picked up from the formerly overlying New Albany, or Chattanooga, shale (Brown 1954). fracturing at the juncture of the Reelfoot Rift and Rough Creek Graben provided pathways for mantle-derived magmas to intrude into the sedimentary column. the Karbers Ridge, IL US Topo Map quadrant. A small steam shovel dug the pits to extract gravel spar (Bastin 1931). Surrounding Plate 2 Fluorspar Area Fault Complex and Shawneetown Fault Zone, Fluorspar Area Fault Complex and Shawneetown Fault Zone, https://isgswikis.web.illinois.edu/ilstruc/index.php?title=Hicks_Dome&oldid=2423, Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License. Is Hicks Dome a volcano? Secure .gov websites use HTTPS > Mafic Intrusive Rock, Volcanic Rock (Aphanitic) Thanks to plate tectonics, the eastern U.S. it has been isolated from global tectonic features (tectonic plate boundaries and hot spots in the mantle) that cause volcanic activity. Data were collected along east-west flight lines spaced 200 meters apart with north-south tie lines flown every 3,000 meters. beneath the dome, as would be expected if a large mafic body Hicks Dome in Hardin County Illinois. 217-333-4747 1-16-11 DREAM: i was living in southern Wisconsin, and my mother-in-law came to visit our family. Thanks for sharing your experience at Hicks Dome! Plutonic Rock (Zartman et al. The Rose Mine, located east of the apex of Hicks Dome, produced gravel spar and some bedding replacement ore. The volcano is called Hicks Dome. Brown, J.A. 1952, Brown et al. An aeromagnetic survey by Where are dormant Illinois volcanoes? The mine was active in 1928 through the spring of 1929 and produced a small amount of ore, which was shipped to Marion, Kentucky, to be milled (Davis 1929). cuestas and strike valleys. SURVEY, Hicks Dome Rare - Earth, Thorium Prospects, Jr. No. Shafts 24 to 154 feet deep were driven to a vein that averaged 4 feet wide, but no commercial production is on record (Weller et al. Antrim. But it is important to take into account the environment every time you light a fire. Hawaii owes its existence to volcanoes, of which there are five on the island. Or, if the crime was committed by someone you know, you may want to protect them. Results were inconclusive because of poor fluorine results along with total weight percentage calculations of 68%. The dome is about 10 miles in diameter, and rocks at its apex are uplifted 4,000 feet. A normal sequence of formations was encountered down to 1,600 feet, but at about that depth the drill entered a confused brecciated zone, which persisted to the bottom of the hole at 2,944 feet. info@isgs.illinois.edu, 2023 University of Illinois Board of Trustees. Additional seismic data sources. The borehole at the apex encountered (1.6 km) out from the apex and gradually diminish farther Grogan, and F.E. A normal sequence of formations was encountered down to 1,600 feet, but at about that depth the drill entered a confused brecciated zone, which persisted to the bottom of the hole at 2,944 feet. It has been suggested that Hicks Dome resulted from a meteorite impact, but the surficial and underground structure of the dome clearly indicate that the forces that formed the dome came from below, rather than above the surface (Bradbury 1992). Shaw, 1967, Areal geology of the Illinois Fluorspar District: Part 3Herod and Shetlerville Quadrangles: Illinois State Geological Survey, Circular 413, map, 1:24,000; report, 41 p. and 1 pl. > Pyroclastic Rock may be different as well. Deposit type. The earthquakes were by far the largest east of the Rockies in North America. Save my name, email, and website in this browser for the next time I comment. Compare with the OMAHA DOME, DES PLAINES DISTURBANCE, The diameter of the dome is about 10 miles. There are many craters documented on this site. The Hicks Dome uplifted ~1200 meters, observed from the west. Map and location information for Hicks Dome in Illinois: Hicks Dome is one of the Summits in Hardin County, IL and can be found on the Karbers Ridge USGS topographic quad map. approximately 4,000 feet (1,200 m). a maximum of about 20 (as much as 45 locally) about 1 mile Washington. A peak's prominence, also known as topographic prominence or relative height, is a measure of how distinct a peak is from other peaks. 2 hole was drilled to 2,485 feet, and the core was composed of breccia cemented by white calcite, with sparse fluorite in the upper portion, but fluorite averaged between 2% and 8% from 2,000 to 2,240 feet. Highly brecciated rock crops out near Please search for specific craters. Drilling into the core of Hicks Dome reveals greatly shattered sedimentary rocks, intermixed with igneous material. Hicks Dome is a structural dome which has its central Devonian core displaced upward some 4,000 feet in relation to the surrounding strata. The "volcano" is called Hicks Dome. THORIUM PROBABLY ACCOUNTS FOR THE 0.029% EQUIVALENT URANIUM IN THE UPPER PART OF THE BRECCIA. It has been suggested that Hicks Dome resulted from a meteorite impact, but the surficial and underground structure of the dome clearly indicate that the forces that formed the dome came from below, rather than above the surface. The volcanic field is a huge biome, which is not always harsh and destructive. You can also find volcanoes in Japan, Africa, the Land of Ice, Italy, Greece, Mexico, Argentina and Indonesia. xenotime. Hicks Dome is approximately 10 The core samples also contained anomalous concentrations of rare earth elements, thorium, and beryllium. The dome has small associated igneous dikes around its flanks. S. Weller et al. It has been interpreted as resulting from explosions beneath the surface and therefore is referred to as a cryptoexplosive or cryptovolcanic feature. Middle Devonian rocks at the center are surrounded concentrically by younger rocks out to Pennsylvanian on the rim. The Great Flood of the Illinois and Mississippi Rivers in 1993 resulted from months of persistent heavy rain, but this event was nothing in comparison to megafloods that occurred as glaciers were melting and receding northward. MC GINNIS, L.D., AND BRADBURY, J.C., 1964, AEROMAGNETIC STUDY OF THE HARDIN COUNTY AREA, ILLINOIS: ILL. STATE GEOLOGICAL SURVEY CIRC. The dome is about 10 miles in diameter. miles (16 km) in diameter and its total structural relief is For permissions information, contact the Illinois State Geological Survey. Official websites use .gov coinciding with the broad Tolu Arch that crosses the Fluorspar Faults surround the dome concentrically with other northeast-trending faults crosscutting it. Hicks Dome is a structural dome which has its central Devonian core displaced upward some 4,000 feet (1,200 m) in relation to the surrounding strata. Middle 1952). The northwest- Hardin County Summits (16) 12201 Sunrise Valley Drive Reston, VA 20192, Region 2: South Atlantic-Gulf (Includes Puerto Rico and the U.S. Virgin Islands), Region 12: Pacific Islands (American Samoa, Hawaii, Guam, Commonwealth of the Northern Mariana Islands). to explosive, alkaline igneous activity at depth. The possibility is suggested that this could have been picked up from the formerly overlying New Albany, or Chattanooga, shale (Brown 1954). This page was last edited on 22 July 2021, at 16:20. [4] Keywords: uorite, Hicks Dome, Mississippi Valley-type deposit, Illinois-Kentucky The Pankey No. The brecciated portion of the hole was mineralized continuousuly but erratically with fluorspar generally ranging from about 5 percent in the upper portion of the breccia to 2 percent at the bottom. Rock samples from Hicks Dome and the surrounding region that were analyzed far exceed the silica cut-off to be considered a carbonatite (sensu stricto), yet a strong, consistent spatial association of abundant carbonate with igneous rocks throughout the region and similar patterns in LIL (large ion lithophyle), HFS (high field strength) and RE (rare earth) elements with carbonatites worldwide supports that magmatic carbon was part of the lamprophyre system at Hicks Dome. It is associated with faults and fractured rock, and is accompanied by igneous rocks and mineral deposits. Latitude: 37.5314387N Brownfield, M.R. Davis, H.W. Edit embedded media in the Files Tab and re-insert as needed. Rare earth element mines, deposits, and occurrences. Richard C. Berg, Director Bradbury et al. part of the Fluorspar Area Fault Complex, played a key role Nuelle So one day, out of curiosity, It was operated by W.M. 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