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46. Укажите, какие предложения соответствуют содержанию текста. Подтвердите свои ответы фактами из текста 6.

1. The purpose of preliminary exploration is to determine the mineral reserves and their distribution in the different sectors of the deposit.

2. The properties of the surrounding rock and overburden should be taken into consideration during the preliminary exploration.

3. The purpose of the detailed exploration is to find out the quantity (reserves) of the deposit.

4. Exploitation exploration facilitates the planning of current production.

5. Both core drilling and non-core drilling are widely used.

6. Recording control instruments allow geologists to get reliable ore samples.

47. Ответьте на следующие вопросы:

1. What stages does exploration include?

2. What is the main purpose of preliminary exploration?

3. What should be taken into consideration by geologists during preliminary exploration?

4. What exploratory openings do you know?

5. Do you know how the quality of the mineral deposit is deter­mined?

6. What is the aim of a detailed exploration?

7. Is core drilling used in prospecting for loose rocks? 8. What is drilling equipment used for?

48. А) Найдите в правой колонке русские эквиваленты следующих сочетаний слов:

1. bedded deposits а) мощность наносов

2. core drilling б) разрабатывать новые место-

3. the angle of dip of the seam рождения нефти

4. the thickness of overburden в) шурфы и квершлаги

5. exploratory workings г) пластовые месторождения

6. composition of minerals д) опробование (отбор) образцов

7. pits and crosscuts е) гол падения пласта

8. to exploit new oil deposits ж) колонковое бурение

9. sampling з) геологический разрез (пород) 10. geological section и) состав минералов

к) разведочные выработки

b) Найдите в правой колонке английские эквиваленты следующих сочетаний слов:

1. буровые скважины а) ground water conditions

2. по простиранию пласта б) detailed exploration

3. равномерность распределе­- в) boreholes

ния минерала в залежи

4. водоносность пород г) along the strike of the bed (seam)

5. карбидные и алмазные коронки д) carbide and diamond bits

6. детальная разведка е) the uniformity of mineral distri-

bution in the deposit

7. использовать новые поисковые ж) the properties of surrounding rocks

методы

8. проникать в залежь з) to make use of new prospecting

methods

9. коренная порода и) country rock

10. свойства окружающих пород к) to penetrate into the deposit

49. Заполните пропуски в предложениях, используя приведенные слова:

Bed bedded bedding

а) 1. Exploration of gently dipping ...deposits is performed by vertical pits.

The principal indicator of the economic importance of combustible shales is the persistence (постоянство) of the ...s in thickness and grade.

As is known, any change in the normal... of a seam is called a disturbance.

Work workable working

6)1. The term "prospecting" covers the whole range of geological ... aimed at discovering ... deposits.

2. Naturally, the prospector also finds non-... mineral concentrations more often than economic ones.

3. Many countries have their own classification system of ... deposits.

4. The type of exploratory ...s needed depends on the thick­ness of overburden and the angle of dip.

5. The thickness of the seam considerably influences the choice of the method of....