11. Ответьте на следующие вопросы

1) How are mineral deposits classified?

2) How are magmatic deposits originated?

3) Where are pegmatites found? What do they consist of?

4) What geological processes form sedimentary deposits?

5) How can mineral deposits formed as a result of sedimentary and weathering be grouped?

6) To what groups do the deposits of gypsum belong?

7) How are placer deposits formed?

8) Which mineral can be referred to the group of residual deposits?

9) Which minerals are formed by the activity of organisms?

12. Составьте план текста 2 и перескажите его.

MINERAL EXPLORATION

Vocabulary

mineral exploration разведка полезных ископаемых

to acquire приобретать, овладевать

mineral deposit месторождение минерального сырья

ore body рудное тело

planning проектирование

to require требовать

to satisfy удовлетворять

executive policy политика (главы) исполнительной власти

target объект

available доступный

to process обрабатывать

favorable- благоприятный, подходящий

regional appraisal оценка района

reconnaissance разведка, рекогносцировка

3- dimensional трёхмерный

sampling выборочный метод; выборочный контроль; выборочное обследование

preliminary evaluation предварительная оценка

prospect разведка; изыскание

submittal документ, представленный на рассмотрение

solicit требовать; запрашивать, спрашивать, ходатайствовать

13. Read the text and fulfill the exercises.

TEXT 3

MINERAL EXPLORATION

Mineral exploration may be considered the effort to find and acquire a maximum number of new economic mineral deposits or ore bodies with a minimum cost in a minimum amount of time.

Planning involves the fundamental questions – what, where, and how? The type and amount of metal or product required to satisfy executive policies will determine the program target. In order to make this decision, all available data must be processed and carefully studied. Although economics and politics are important, the critical item is geology. Without the regional geologic maps the selection of favorable areas is difficult..

Exploration of a selected favorable region can usually be divided into four stages: regional appraisal, detailed reconnaissance of favorable areas, detailed surface appraisal of target area, and detailed three-dimensional sampling and preliminary evaluation.

Several accepted methods or procedures are available for the appraisal during the different stages. Probably the most common approach is the examination of prospects described in the literature or documented in company files. New submittals may also be solicited.