Petrology of lower Permian volcanic rocks from the Larne No. 2 (geothermal) Borehole, Co. , Antrim, Northern Ireland

Technical Report · Tue Jan 01 00:00:00 EST 1985

OSTI ID:7254824

Harrison, R K; Styles, M T; Penn, I E; Davis, A E

The isotopically-dated, Permian volcanic succession penetrated by the Larne No.2 Borehole, Co. Antrim, Northern Ireland was examined petrographically, by electron microprobe analyses of selected samples and by major oxide and trace element chemistry of the only substantial rock fragment recovered. The succession comprises eight stratigraphical units defined by characteristic and predominant lithology and by characteristic gamma-ray and sonic log signatures. The lowest unit penetrated, Breccio-Conglomerate and Sandstone, includes volcanic rocks ranging from olivine-basalt, olivine-free basalt, intermediate lavas, to rhyolite and felsite. These indicate denudation of a predominantly volcanic terrain probably deposited in a proximal alluvial-fan environment.

• Research Organization: British Geological Survey, Keyworth
• OSTI ID: 7254824
• Report Number(s): PB-86-241122/XAB
• Resource Relation: Other Information: Published as Report of the British Geological Survey, Vol. 17, No. 6 1985
• Country of Publication: United States
• Language: English

Related Subjects

15 GEOTHERMAL ENERGY
GEOTHERMAL RESOURCES
VOLCANIC ROCKS
PETROGRAPHY
BASALT
BOREHOLES
CHEMICAL ANALYSIS
ELECTRON MICROSCOPY
LITHOLOGY
OXIDES
CAVITIES
CHALCOGENIDES
IGNEOUS ROCKS
MICROSCOPY
OXYGEN COMPOUNDS
RESOURCES
ROCKS
150302* - Geothermal Exploration & Exploration Technology- Geochemical Techniques & Surveys