Lamprophyre dike intrusion and the age of the Alpine fault, New Zealand

Journal Article · Thu Oct 01 04:00:00 EDT 1987 · Geology; (United States)

DOI:https://doi.org/10.1130/0091-7613(1987)15<941:LDIATA>2.0.CO;2· OSTI ID:5237620

Cooper, A F; Barreiro, B A; Kimbrough, D L; Mattinson, J M

The orientations of intrusive rocks from a carbonatitic lamprophyre dike swarm and the history of emplacement relative to country-rock schist structures are compatible with intrusion into tension fractures and Riedel shears formed during initiation of the dextral wrench system of the Alpine fault. New U-Pb and Rb-Sr dates indicate a late Oligocene-early Miocene time of intrusion which, in turn, suggests a mid-Tertiary history for propagation of the Alpine fault plate boundary through South Island, New Zealand.

• Research Organization: Univ. of Otago, Dunedin (New Zealand)
• OSTI ID: 5237620
• Journal Information: Geology; (United States), Journal Name: Geology; (United States) Vol. 15:10; ISSN GLGYB
• Country of Publication: United States
• Language: English

Related Subjects

58 GEOSCIENCES
580100* -- Geology &amp; Hydrology-- (-1989)
ACTINIDES
AGE ESTIMATION
ALKALI METALS
ALKALINE EARTH METALS
AUSTRALASIA
DIKES
ELEMENTS
GEOLOGIC AGES
GEOLOGIC DEPOSITS
GEOLOGIC FAULTS
GEOLOGIC FRACTURES
GEOLOGIC HISTORY
GEOLOGIC STRUCTURES
INTRUSION
ISOTOPE DATING
LEAD
METALS
NEW ZEALAND
PLATE TECTONICS
RUBIDIUM
STRONTIUM
TECTONICS
URANIUM