1 Petrology Lecture 9 Introduction to Metamorphism GLY 4310 - Spring, 2012.
GLY 820 Lecture
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Transcript of GLY 820 Lecture
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Mineral ExplorationProgramme
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A simple programme typical of many and stated very broadly might be asfollows:
(a) Selection of area by broad geological considerations,
(b) Acquisition of area for exploration activities,
(c) Reconnaissance exploration, possibly by broad geochemical,geological and
geophysical methods,
(d) Selection of areas of particular interest as indicated by thereconnaissance wor,
(e) !etailed local geological ,geochemical and geophysical wor,
(f) "onclusive activities such as costing, drilling, shaft sining etc#
(g) $easibility studies,
(h) !ecision to mine, hold for future or surrender,
(i) Appropriate action#
As each pro%ect has its own particular characteristics, the program should
be chosen to &t it individually, and as each frequently is of di'erent merit
compared to
others, this may inuence the resources and hence the methodsemployed#
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Benefts o Mineral Exploration Programme
he bene&ts of a well articulated mineral exploration programme willinclude but not limited to the following:
*# A well stated programme of wor is helpful to the o+cer because it helpsto put the %ob in perspective, draws attention to the need for resources andthe level of coordination that would be needed to successfully carry outthe programme etc#
.# A well articulated programme permits adequate monitoring of the successof the exploration programme# /t provides a basis for periodical review, anddiscussion without excessive involvement in or distraction by detail#
0# he 1rogramme clearly de&nes the deferent professional that are involvedand the role of each# programmes are the foundation for schedules, and
2# 1erhaps most important of all programmes and schedules are
fundamental to control# 3ithout control, resources cannot be expended withoptimum e+ciency, and this reduces the lielihood of success of the ventureat hand
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!e&nitions4 5ife cycle of a mine
4 "lassi&cation of reserves andresources
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Defnitions
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A mineral occurrence is anylocality where a useul mineralor material is ound.
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A mineral prospect is anyoccurrence that has beendeveloped by underground or byabove ground techniques or bysubsurace drilling to determine
the extent o minerali!ation.
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he terms mineral occurrence andmineral prospect do not haveany resource or economicimplications.
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A mineral deposit is anyoccurrence o a valuablecommodity or mineral that is osu"cient si!e and grade#concentration$ that has
potential or economicdevelopment under pastpresent or uture avorable
conditions.
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An ore deposit is a well%defnedmetallierous mineral deposit that has
been tested and ound to be o su"cientsi!e grade and accessibility to beextracted #i.e. mined$ and processed at aproft at a specifc time. &hus the si!e
and grade o an ore deposit changes asthe economic conditions change. &o someminers however an 're reers toindustrial minerals as well as metals.
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"5ASS/$/"A/67 6$ R8S8R98S A7! R8S6R"8S
ReservesInferred: That part of a MineralResource for which tonnage,grade and mineral content can beestimated with a low level of
condence.4Indicated: That part of a MineralResource for which tonnage,densities, shape, physicalcharacteristics, grade andmineral content can be estimated
with a reasonable level ofcondence.4Measured: That part of a MineralResource for which tonnage,densities, shape, physicalcharacteristics, grade and
mineral content can be estimatedwith a high level of condence
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7ature and ;orphology of ;ineral
!eposits
abular
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heories of 6re genesis
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Mining Methods
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(.).*
+.M
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7!8R=R67! ;/7/7=
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