ADJ

gas, mineral, oil, petroleum
polar, space
offshore
the heavy cost of offshore oil exploration
archaeological, scientific
speculative
extensive
detailed

VERB + EXPLORATION

carry out
Extensive exploration was carried out using the latest drilling technology
continue

EXPLORATION + VERB

take place
areas where mineral exploration is taking place

EXPLORATION + NOUN

activity, drilling
Exploration activity slowed during the 1970s
programme
company
an oil exploration company

PREP

~ for
speculative exploration for oil

ADJ

brief
extensive
deep, full
careful, detailed
My ideas on semantics needed more careful exploration
creative, critical
creative exploration of music as a medium in education
intellectual
personal
her personal exploration of spirituality

VERB + EXPLORATION

need
continue