Автор статьи
Валерия
Эксперт по сдаче вступительных испытаний в ВУЗах
- accumulation, 2. investigator, 3. firmly, 4. thickness, 5. originate, 6. biochemical, 7. different, 8. igneous.
- Mechanical sediments can be either consolidated or unconsolidated.
- Neither faults nor fissures were found by the surveyors.
- We study both rock mechanics and surveying.
- Both mining engineers were highly skilled specialists.
- They (to have) obtained reliable information on the mineral reserves next week.
- We (to have) already observed physical weathering in deserts.
- He is the best student in our group: he (to have) excellent marks in metallurgy and mining.
- He told me he (to have) never heard about academician A.Y. Fersman before.
- Coal is still the most important fuel.
- No fissures were found.
- We say that the method of mining is rational if it guarantees only safety of the men and maximum output of minerals.
- The shield method of mining is used where short faces are worked.
- After mining or dredging ores are usually processed, crushed or dried.
- The drills for making holes have handles.
- A level is a horizontal road with no direct access to the surface.
- As a rule open-cast mining is used when the deposit lies near the surface.
- The benches may be separated by thin layers of clay, shale, pyrite or other mineral matters commonly called partings.
- Modern deposits of Kamchatka volcanoes must be investigated.
- They were to meet at the Institute at five.
- One can get higher mining education at a higher mining Institute.
- You should attend your classes regularly to become a highly qualified specialist.
- They have to explore those deposits again.
- He will be able to work as a mining engineer after graduation from the Institute.
- The students were allowed to use this modern equipment while their practical training.
Iron Deposits
Iron is one of the most abundant metals in the Earth’scrust. There are three important classes of iron deposits associated with igneous rocks; residual deposits and sedimentary deposits. Iron deposits associated with igneous rocks are usually small but very rich bodies either of hematite or magnetite. Large concentrations have been successfully mined in Pensylvania (the USA) and in the Russian Federation. Residual deposits of iron minerals are formed wherever weathering occurs. Iron deposits formed this way are very widespread. Sedimentary iron deposits make up most of the world’s current production. As the essential component of every variety of steel, iron is obviously the most important of all industrial metals. It has played a large part in the development of our modern civilization. Iron ores are mainly used for producing cast iron, steels and ferroalloys. From a scientific point of view, iron’s most significant property is that it becomes magnetized. The magnetic iron ore is the main wealth of the Kursk Magnetic Anomaly (KMA). Iron fields are worked by surface mining which is more economical. But the KMA is rich not only in iron ores. Its deposits contain bauxite, phosphorite, cement, sand and clay. 7) Составьте план к тексту в форме простых предложений.
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