EXPLORATION GEOLOGY (EXPLO PROPER)

Question 1

Surface Guides

Answer 1

1. Favorable Strat and Host Rocks
2. Weathering and Leaching
3. Ancient Mining and Smelting
4. Shear Zones
5. Lineament

Question 2

Most suitable target for Cr-Ni-Pt-Cu

Answer 2

Archean/Proterozoic
LMI

Question 3

Best and most significant surface signature for a base-metal exploration Guide

Answer 3

Gossans

Question 4

What are Gossans

Answer 4

Yellow or Red Colored Iron Oxide Rich Zones

Question 5

Oldest Zinc Smelting Site

Answer 5

Zawar

Question 6

the result of a huge volume of rock deformation due to intense regional stress typically in the zones of subduction at depths down to a few Km

Answer 6

Shear Zones

Question 7

What type of ores usually occurs at shear zones?

Answer 7

Syngenetic or epigenetic Hydrothermal

Question 8

Characteristics of ores or rocks in Shear zones

Answer 8

Metasomatized and often display retrograde metamorphism assemblage

Question 9

A record of geological facts, occurrence or rocks in space, and their contact, weathering effects such as leaching or gossan, anfd structure in their correct space relation

Answer 9

Geologic Map

Question 10

Maps that are prepare by taking traverse on the surface at various intervals and plotting records like rock types, contancts and all other observatons inclusing strike and Dop

Answer 10

Surface Map

Question 11

Maps that are used to select boundaries for a reconnaissance exploration and represents overall regional picture

Answer 11

Regional Scale Surface Map

Question 12

Features highlighted in a Regional Map

Answer 12

Geomorphology and Draianage Pattern

Question 13

Scale of Regional Map

Answer 13

1:50K- 1:250K

Question 14

What type of sampling are employed at regional scale?

Answer 14

Soil, Grab, and Rock chip Samples of Rocks and weathered profiles

Question 15

Represents a part of the regional map having cluster of deposits and recorded with closely spaced traverses and rock/Soil sampling use to selecr area for prospecting

Answer 15

District/Belt Scale Map

Question 16

Scale of Belt or District Map

Answer 16

1:25K - 1:10K

Question 17

What features are highlighted in Belt or District Map?

Answer 17

Strat, Lithology, Detailed Structures, Surface Mineralizaion and Ancient mining if avaiable

Question 18

Scale of a deposit Map

Answer 18

1:5K - 1:1K

Question 19

Purpose of a deposit Map?

Answer 19

Helps in designing a drilling program to delineat minerals or ore bodies, detailed surface geol features, extent of deposits, location of trenches, pits, and borehols and draw sections along and across elongation of mienralization

Question 20

scale of Underground Maps?

Answer 20

1:200 or 1:50

Question 21

Goal of Regional Scale Exploration

Answer 21

Synthesis of all available data and concepts in order to delineate area for reconnaisance while the resource is of a preliminary nature

Question 22

Activities in Regional Scale Exploration

Answer 22

Aerial Geophysics
Broad Based Geochem
Ground Check
Wide Spaced Soil and Rock Chip Sample
Pitting, Trenching
Few Scout Drillings
Demarcation of Priority and Ranking of Targets

Question 23

Deliverables at Regional Scale Exploration

Answer 23

Work Plan
Preparation of Org Plan
Exploration Scheme with Fund Allocation
Budgeting, Time Scheduling to achieve Specific Objectives

Question 24

Activties at District Scale exploration

Answer 24

Identification of type of exploration methods, time and fund recquirements
Geologic Mapping of Target Areas
Recognition of surface signatures like weathering and Alteratinos, Identification of Host Rocks and Sturctureal settings and control
Ground Geophysics and Geochem
Delineation of porved and Probable reserves

Question 25

Deliverables at Local Scale Exploration

Answer 25

Scoping Study, Prefeasibi Study and Feasib Study