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Geophysical Investigation on abandoned gypsum mine, Blackhawk, SD 3 INTRODUCTION The present report is the second phase-study of an integrated geophysical investigation to determine the unknown extent of the abandoned Blackhawk gypsum mine, SD. In the first phase (May 2021), the northern and northeastern parts were investigated.
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Geophysical Investigation on abandoned gypsum mine, SD Background Summary Montana Technological University Page 5 west of the Blackhawk underground mine. Based on a cross-section presented in the 1:24,000 Geologic map of the Blackhawk quadrangle, South Dakota (Lisenbee and Hargrave 2005), the Spearfish Formation dip s down to the northeast .
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23-06-2021· An abandoned gypsum mine in Black Hawk, S.D., that was exposed by a sinkhole in 2020 may extend farther than current mapped areas show, according to a geophysical study.
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Microgravity is a geophysical method that is increasingly being used for environmental and geotechnical investigations. Microgravity measurements respond to changes in subsurface density, and are a non-invasive way to effectively identify and characterize subsurface voids, including abandoned mines.
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23-05-2021· Published: May. 23, 2021 at 4:50 PM PDT. BLACK HAWK, S.D. (KEVN) - The residents of Hideaway Hills gathered today to hear an update on the geophysical study done on the abandoned gypsum mine,
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Geophysical study done on Hideaway Hills gypsum mine
23-05-2021· Published: May. 23, 2021 at 4:50 PM PDT. BLACK HAWK, S.D. (KEVN) - The residents of Hideaway Hills gathered today to hear an update on the geophysical study done on the abandoned gypsum mine,
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Study: Abandoned gypsum mine could extend below interstate,
RAPID CITY, S.D. (AP) — An abandoned gypsum mine in Black Hawk that was exposed by a sinkhole in 2020 may extend farther than current mapped areas show, according to a geophysical study. Mohammad Sadeghi, a professor of geological engineering at Montana Technical University who led the study, says there's the possibility that the mine extends
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