Subsurface geology of Paleozoic, Mesozoic, and Cenozoic units in southeast Missouri

10.3133/i1875 ◽  
1988 ◽  
Keyword(s):  
Subsurface Geology ◽  
Southeast Missouri

THE PILOT KNOB IRON ORE DEPOSIT IN SOUTHEAST MISSOURI, USA: A HIGH-TO-LOW TEMPERATURE MAGMATIC-HYDROTHERMAL CONTINUUM

2019 ◽  
Author(s):  
Bolorchimeg Nanzad ◽  
◽  
Marek Locmelis ◽  
Brandon James Sullivan ◽  
Ryan Mathur
Keyword(s):  
Low Temperature ◽  
Iron Ore ◽  
Ore Deposit ◽  
Southeast Missouri ◽  
Iron Ore Deposit

scholarly journals Location of agate geodes in Permian deposits of Simota gully using the GPR

2021 ◽  
Author(s):  
Michał Mierczak ◽  
Jerzy Karczewski
Keyword(s):  
Signal Processing ◽  
High Frequency ◽  
Electromagnetic Energy ◽  
Reflection Coefficients ◽  
Electric Permittivity ◽  
Pyroclastic Deposits ◽  
High Attenuation ◽  
Subsurface Geology ◽  
Study Test

AbstractThe article describes the establishment of the location of agate geodes using the GPR method in the area of the Simota gully (Lesser Poland Voivodeship). Agates (a multicolored variety of gemstone of chalcedony group) have multifaceted values that informed their study. Traditional methods of geode location are less reliable, hence the attempt to use the GPR method. Measurements were taken at two study test sites with subsurface geology of weathered melaphyre and pyroclastic deposits using a GPR system (ProEx). A high-frequency antenna (1.6 GHz) was used along with the pre-established profiles of lengths of 6-m and 10-cm intervals. Furthermore, simple soil tests using the soil sampler tool were made prior to the GPR measurement. The GPR results show significant high attenuation of the electromagnetic energy interpreted to be due to clay components of the regolith. Advanced signal processing procedures (such as the attribute of the signal) were used on the data for better enhancement that aided interpretation. Other anomalies depicted on the radargrams were thought to be the presence of roots, pieces of melaphyres-targeted agates. Furtherance to ascertain the reflection coefficients as recorded on the GPR data, in situ samples (root pieces, melaphyres, agates) taken were tested in the laboratory for electric permittivity property. Based on the interpretation results, several agate geodes were dug out from the ground.

scholarly journals Stratigraphic and Tectonic Setting of the Liguride Units Cropping Out along the Southeastern Side of the Agri Valley (Southern Apennines, Italy)

Geosciences ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 125
Author(s):  
Giacomo Prosser ◽  
Giuseppe Palladino ◽  
Dario Avagliano ◽  
Francesco Coraggio ◽  
Eleonora Maria Bolla ◽  
...  
Keyword(s):  
Field Survey ◽  
Southern Italy ◽  
Tectonic Setting ◽  
Mediterranean Area ◽  
Fold Belt ◽  
Southern Apennines ◽  
Tectonic Structures ◽  
Subsurface Geology ◽  
Multidisciplinary Study ◽  
Geological Map

This paper shows the main results of a multidisciplinary study performed along the southeastern sector of the Agri Valley in Basilicata (Southern Italy), where Cenozoic units, crucial for constraining the progressive evolution of the Southern Apennine thrust and fold belt and, more in general, the geodynamic evolution of the Mediterranean area are widely exposed. In particular, we aimed at understanding the stratigraphic and tectonic setting of deep-sea, thrust-top Cenozoic units exposed immediately to north of Montemurro, between Costa Molina and Monte dell’Agresto. In the previous works different units, showing similar sedimentological characteristics but uncertain age attribution, have been reported in the study area. In our study, we focussed on the Albidona Formation, pertaining to the Liguride realm, which shows most significant uncertainties regarding the age and the stratigraphic setting. The study was based on a detailed field survey which led to a new geological map of the area. This was supported by new stratigraphic, biostratigraphic and structural analyses. Biostratigraphic analysis provided an age not older than the upper Ypresian and not younger than the early Priabonian. Recognition of marker stratigraphic horizons strongly helped in the understanding of the stratigraphy of the area. The study allowed a complete revision of the stratigraphy of the outcropping Cenozoic units, the recognition of until now unknown tectonic structures and the correlation between surface and subsurface geology.

The Pilot Knob Iron Ore Deposits in Southeast Missouri: A High-To-Low Temperature Magmatic-Hydrothermal Continuum

2021 ◽  
pp. 103973
Author(s):  
Bolorchimeg N. Tunnell ◽  
Marek Locmelis ◽  
Cheryl Seeger ◽  
Ryan Mathur ◽  
István Dunkl ◽  
...  
Keyword(s):  
Low Temperature ◽  
Iron Ore ◽  
Ore Deposits ◽  
Southeast Missouri ◽  
Iron Ore Deposits

Source of Lead in Southeast Missouri Galena Ores

1972 ◽  
Vol 67 (4) ◽  
pp. 409-425 ◽  
Author(s):  
Bruce R. Doe ◽  
Maryse H. Delevaux
Keyword(s):  
Southeast Missouri

Mineralogy, paragenesis, and mineral zoning of the West Fork Mine, Virburnum Trend, Southeast Missouri

1992 ◽  
Vol 87 (1) ◽  
pp. 113-124 ◽  
Author(s):  
John A. Mavrogenes ◽  
Richard D. Hagni ◽  
Paul R. Dingess
Keyword(s):  
The West ◽  
West Fork ◽  
Southeast Missouri ◽  
Mineral Zoning
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