scholarly journals Nový pohled na genezi ordovické oolitické rudy z ložiska Skalka u Mníšku pod Brdy (pražská pánev, Barrandien)

2019 ◽  
Vol 26 (1-2) ◽  
Author(s):  
David Buriánek ◽  
Miroslav Bubík ◽  
Dalibor Všianský
Keyword(s):  
Deep Water ◽  
Iron Ore ◽  
Original Position ◽  
Iron Ores ◽  
Ore Deposit ◽  
Prague Basin ◽  
Gravity Flows ◽  
Marine Realm ◽  
Oolitic Iron Ore ◽  
Iron Ore Deposit

The Skalka Deposit near Mníšek pod Brdy currently represents one of the best exposed localities of Ordovician oolitic iron ores in the Barrandian. The studied oolitic iron ores consist mainly of siderite (Fe = 1.47–1.86 apfu) and kaolinite (Si = 7.99–8.06 apfu; VIAl = 7.62–7.67 apfu). This mineral association has been formed as a result of the process of diagenesis and has resulted from the decomposition of chlorite and Fe-(oxo-)hydroxides. Presence of colofane indicates rather low temperatures for this transformation. Paleontological record makes the previous hypothesis, that the iron ore deposit was formed in an isolated depression separated from the Prague Basin by a flat elevation, questionable. The presence of abundant graptolites and agglutinated foraminifers in the shales of the Šárka Formation indicates rather deep-water open-marine conditions. Ferruginous ooids are typically formed on shoals affected by wave action. The presence of these ooids in deep-water shale and existence of oolitic iron ore deposit accompanied by this shale does not need to be explained by sudden shallowing, but more likely by reworking of ooids in gravity flows to sublittoral or bathyal depths. Original position of shoal was most likely situated towards NNW where ore deposit and finally the complete Šárka Formation disappear. The fossil record indicates open-marine realm southeast of the Skalka area.

scholarly journals Geological Controls on High-Grade Iron Ores from Kiriburu-Meghahatuburu Iron Ore Deposit, Singhbhum-Orissa Craton, Eastern India

Minerals ◽  
2017 ◽  
Vol 7 (10) ◽  
pp. 197 ◽  
Author(s):  
Jitendra Prasad ◽  
Akella Venkatesh ◽  
Prabodha Sahoo ◽  
Sahendra Singh ◽  
Nguo Sylvestre Kanouo
Keyword(s):  
Iron Ore ◽  
High Grade ◽  
Iron Ores ◽  
Eastern India ◽  
Ore Deposit ◽  
Iron Ore Deposit

scholarly journals STUDY OF SOLIDIFYING MIXTURES IN MINING KRYVYI RIH IRON ORE DEPOSIT “KIROV”

2021 ◽  
Author(s):  
Serhii Pysmennyi ◽  
◽  
Valerii Pozdniakov ◽  
Victoria Biluk ◽  
◽  
...  
Keyword(s):  
Blast Furnace ◽  
Blast Furnace Slag ◽  
Iron Ore ◽  
Temperature Fluctuations ◽  
Iron Ores ◽  
Ore Deposit ◽  
Labour Costs ◽  
Iron Ore Deposit ◽  
Technical And Economic Indicators ◽  
Furnace Slag

The work addresses the issue of selecting a solidifying mixture when mining deposits of naturally lean iron ores by open stoping systems to decrease mining costs without the concern for surface subsidence. Magnetite quartzites are mined by systems applied to mining naturally rich iron ores that provide for leaving significant reserves in pillars. In view of the above, when mining magnetite quartzites, it is reasonable to consider application of open stoping with backfilling. Application of polymer additives in the backfill instead of cement allows decreasing costs for water and binders while retaining its strength. As they are able to couple with any binders and fillers, polymers can be added to not only concretes and cement grouts. This provides opportunities to widely use mining and concentrating wastes, i.e. slag and waste rock. Advantages of applying mixtures with plasticizers are: lower labour costs, reduced risks of cracking, increased abrasion resistance, lower shrinkage, increased resistance to temperature fluctuations, backfilling without vibrations, a longer concrete mixture lifecycle. Aggregate technical and economic indicators demonstrate that with similar physical properties of the backfill, polymer-based backfilling is 2-3 times cheaper as compared with the cement-based one. Thus, when stoping with backfilling at Artem underground mine, it is advisable to use a polymer blast furnace slag backfill as a solidifying mixture.

Exploration of Siling iron ore deposit in Shanxi Province

2019 ◽  
Vol 1 (2) ◽  
pp. 37-41
Author(s):  
Su Kangjie ◽  
Yuan Ya
Keyword(s):  
Iron Ore ◽  
Shanxi Province ◽  
Ore Deposit ◽  
Iron Ore Deposit

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

Three-dimensional geomechanical model of the Tashtagol iron-ore deposit

1998 ◽  
Vol 34 (3) ◽  
pp. 209-216 ◽  
Author(s):  
L. A. Nazarova ◽  
L. A. Nazarov ◽  
A. V. Leont'ev
Keyword(s):  
Iron Ore ◽  
Three Dimensional ◽  
Geomechanical Model ◽  
Ore Deposit ◽  
Iron Ore Deposit

Resource and reserve analysis of Hasançelebi Iron Ore deposit, Turkey

2018 ◽  
pp. 199-202
Author(s):  
B. Elevli ◽  
A. Demirci ◽  
A. Dogan ◽  
G. Onal
Keyword(s):  
Iron Ore ◽  
Ore Deposit ◽  
Iron Ore Deposit

scholarly journals Geophysical surveys of rock mass status of iron ore deposit with combined deep – opencast mining zone

2020 ◽  
Vol 177 ◽  
pp. 02006
Author(s):  
Andrey Vedernikov ◽  
Pavel Zuev ◽  
Danila Grigoriev
Keyword(s):  
Iron Ore ◽  
Diagnostic Method ◽  
Underground Mining ◽  
Opencast Mining ◽  
Combined Method ◽  
Ore Deposit ◽  
Seismic Profiling ◽  
Geophysical Surveys ◽  
Iron Ore Deposit ◽  
Underground Method

Often in deposits developed by underground mining, the task is to control the state of the earth's surface within the mine field. And this problem is even more acute in the case of combined open-underground mining. The Goroblagodatskoe iron ore deposit has been developed by a combined method for more than 40 years. The article describes the methodology and results of applying the geophysical diagnostic method at a mining facility developed by a combined open-underground method - the spectral seismic profiling method (SSP). The application of this method is justified. This method has shown its sufficient efficiency in terms of time costs and sufficient reliability for local studies. The results of field and desk studies are obtained, an assessment of the nature of the object is given, which justifies the use of further measures for the safe development of the object.

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