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Geologists examine and record the structure and make-up of the earth and
associated materials, such as rocks and fossils. Their tasks include
studying samples of earth or rock core to measure the effect
of soil
erosion, and preparing reports on their findings for relevant government or
scientific bodies. Geologists may also work for one of the many mining
companies that search for precious materials all over
Australia.
ANZSCO ID & Description:
234411: Studies the composition, structure and other physical
attributes of the earth to increase scientific knowledge and to develop
practical applications in fields such as mineral exploitation, civil
engineering, environmental protection and rehabilitation of land after
mining.
Rockface
Specialisations
-
Database Geologist
- maintains and updates the database of drilling
and assay results acquired during exploration and mining. This involves
receiving incoming new data, uploading it, and constantly ensuring that data
is correct and up to date.
-
Engineering Geologist
- works with engineers to
carry out detailed geological mapping before major construction work,
assesses the qualities of building stone and quarry rocks used for building
and road construction, and assesses geological structures for open-cut and
underground mine stability and safety, and foundations for building.
-
Environmental Geologist
- studies the nature of
ground and surface waters, soil movement, erosion and degradation,
salinisation and coastal erosion; the effects of pollution and human
activity on rivers and seas; and the environmental effects of mining,
nuclear energy and waste disposal.
-
Field/Exploration Geologist
- carries out surveys
to determine the geological structure, distribution and age of rocks and
investigate where particular natural resources are likely to be found.
-
Geochemist/Mineralogist/Petrologist - studies the
mineral and chemical composition of rocks using equipment such as optical
and electron microscopes, X-ray diffraction, atomic absorption and mass
spectrometry. They may also be involved in examining the transport of
pollutants through rock masses.
-
Geomorphologist - studies the evolution and age
of landforms and land surfaces.
-
Hydrogeologist
- evaluates and manages the quality, quantity, reliability and
sustainability of all aspects of water resources. They are concerned
with groundwater and the soil-moisture variation, amount, speed and
direction of groundwater flow, extraction and replenishment of
groundwater, and water chemistry and pollution
-
Mathematical Geologist
- models the outcome of
geological processes by devising and applying the most appropriate data and
computer models.
-
Mine Site Geologist
- monitors and controls the
grade (or quality) of the ore mined. They also advise on assessments of the
areas of an ore body that should be mined at a particular time, and on
defining the ore limits at the mine based on economic considerations.
-
Palaeontologist -
examines, classifies and describes animal and plant fossils found in
sedimentary rocks. Understanding the evolutionary order of the fossil record
is particularly important in oil exploration.
-
Petroleum Geologist - explores and charts
stratigraphic arrangement, composition and the structure of the Earth's
surface layers to locate petroleum and natural gas. They estimate the size
and distribution of reserves using seismic and geological survey evidence
and recommend the most appropriate drilling and production methods.
-
Stratigrapher - deals with the order in which
sedimentary rock strata have been deposited, their age and the processes by
which they were formed.
-
Structural Geologist - studies rock structures in
field mapping and in laboratory studies to reveal the history of folding and
faulting, and how these structures can influence mine engineering and
building foundations. They also conduct studies in water flow in aquifers.
Geologist studying core samples
Knowledge, skills and attributes
A geologist needs:
- physical fitness
- to enjoy working outdoors
- the ability to undertake detailed and delicate
operations
- strong organisational skills
- to be able to work well as part of a team.
(Source: WebArchive Only CareerHQ)
Duties and Tasks
Geology is a broad field that includes many areas such as geophysics,
environmental geology, energy resources, or mining and mineral extraction.
As a geologist, you might:
-
assess the ground for building suitability on
engineering projects like dam or tunnel building
-
advise on suitable sites for landfill or storage
of nuclear waste
-
search for energy resources and minerals, such as
gas and oil
-
design projects to search for new water supplies
-
study volcanic and seismic activity to develop
early warning systems for earthquake zones
-
advise on civil engineering projects, or on the
rehabilitation of land after mining activity.
You would use a range of investigation methods in your work, including
drilling, seismic surveying, satellite and aerial imagery, and
electromagnetic measurement.
Working conditions
Geologists work in a wide range of settings, depending on their
specialisation. Exposure to the elements is an important part of a
geologist's fieldwork, as is the possibility of working in remote and
isolated locations. In Australia, geologists might conduct research in areas
as diverse as rivers, along the coastline, in mine sites and the outback.
Tools and technologies
Equipment and technology used by geologists during the course of their
fieldwork or in laboratories may include microscopes, GIS mapping software,
compasses, picks, and rock hammers. Safety clothing such as helmets,
protective glasses and steel capped boots need to be worn in most locations,
particularly those involving rocky or dusty terrain.
Education and training/entrance
requirements
To become a geologist you usually need to complete a degree in science with
a major in geology or a related science.
Did You Know?
Australia has some of the oldest
geological features in the world with the oldest known rocks dating
from more than 3000 million years ago and rare zircon crystals
dating back 4400 million years located in much younger rocks. The
zircons evolved very soon after the planet was formed. These ancient
features compare with the oldest known rock on Earth in northwestern
Canada. Scientists say that rock was formed 4031 million years ago.
Some areas of Victoria and Queensland are geologically much younger
as a result of volcanic activity which last erupted a few thousand
years ago. Australia's youngest mainland volcano is Mount Gambier in
South Australia which last erupted only about 6000 years ago.
In recent years, the advent of improved technology and more
extensive geological exploration has resulted in a greater knowledge
of the age of rocks in Australia. It has resulted also in an
increased ability to better understand the continent's past. This
has been achieved by combining exploration methods such as deep
seismic surveys with geochronology methods, including use of
equipment such as the Sensitive High-Resolution Ion Microprobe, or
SHRIMP. This equipment uses uranium and lead isotopes from tiny
portions of zircon crystals which have been extracted from rock
samples to calculate the age of the crystal based on the natural
decay rate of uranium to lead. The SHRIMP is central to Geoscience
Australia's geochronology program.
(Source:
Geoscience Australia)
Geological Map of Australia
(Source:
Wikipedia)
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