Which element, whose radioactive isotope is detected in gamma ray surveys, is typically depleted in the regolith?

b. which magnetic mineral is enriched in the regolith and is formed by bush fires?

c. how does the magnetic susceptibility of most rocks, when subjected to intense chemical weathering, alter from its fresh counterpart?

d. which geophysical method is used extensively by regolith geologists in mapping?

e. when a massive sulphide orebody is subjected to intense chemical weathering, how are the following affected?

i. magnetic characteristics

ii. density

iii. electrical properties

f. which geophysical method may be strongly affected by soil creep?
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