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PERSONAL REVIEWER > Geophysics > Flashcards

Geophysics Flashcards

1
Q

a subject of natural science concerned with the physical processes and physical properties of the Earth and its surrounding space environment and the use of quantitative methods for their analysis

A

Geophysics

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2
Q

Sub discipline of Geophysics

A
  1. Global Geophysics
  2. Exploration Geophysics
  3. Geotechnical & Environmental Geophysics
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3
Q

Sample of Global Geophysics

A

Structure of the Earth

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4
Q

Samples of Exploration Geophysics

A
  1. Petroleum Geophysics
  2. Mining Geophysics
  3. Groundwater Studies
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5
Q

Samples of Geotechnical & Environmental Geophysics

A
  1. Site investigations
  2. Contaminant Studies
  3. Archaeological Investigation
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6
Q

geophysics that focus on structures that trap oil

A

Petroleum Geophysics

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7
Q

geophysics that focus on detection of ore bodies

A

Mining Geophysics

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8
Q

geophysics that focus on the depths, thickness

A

Groundwater studies

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9
Q

geophysics that focus on mechanical properties and depth

A

site investigations

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10
Q

geophysics that focus on detection and flow direction

A

Contaminant studies

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11
Q

its objective is to locate or detect the presence of subsurface structures or bodies and determine their size, shape, depth, and physical properties

A

Geophysics

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12
Q

detected when a survey encounters some geometric perturbation in the distribution of a particular physical property in the rocks

A

Geophysical Anomaly

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13
Q

Arise due to lateral perturbations in rock density, magnetic ones are caused by lateral changes in rock magnetization, and seismic anomalies indicate variations in acoustic impedance

A

Gravity Anomalies

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14
Q

objective of the survey; due to the causative or target body

A

Signal

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15
Q

Anything else measured but which may not contain useful information

A

Noise

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16
Q

is of most concern in geophysical surveys

A

S/N ratio

17
Q

utilizes natural fields of the earth

A

Natural

18
Q

Involves generation a field using an artificial source

A

Artificial

19
Q

Fluctuating Measurements (e.g. lightning strokes, magnetic storms, earthquakes, typhoons)

A

Natural Disturbance

20
Q

Man made structures (e.g. powerlines, buried metal pipes, metallic objects on the ground)

A

Artificial Disturbance

21
Q

Variable thickness of overburden, presence of non-economical minerals in the overburden or overlying layers

A

Geological Noise

22
Q

Remedy for Natural Disturbance

A

Discontinue Measurement

23
Q

Remedy for Artificial Distubance

A

Stay away from source of noise

24
Q

Remedy for Geological Noise

A

Mathematical Correction

25
Q

best applied to flat or gently undulating terrain

A

Ground

26
Q

For large or heavily forested areas

A

Airborne

27
Q

For offshore Investigations

A

Marine

28
Q

Records one or more physical properties as a function of depth

A

Borehole

PERSONAL REVIEWER (28 decks)

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