caa a22 4500 386403287 CHVBK 20180307112209.0 cr unu---uuuuu 161130e198907 xx s 000 0 eng 10.1017/S0016756800006580 doi S0016756800006580 pii (NATIONALLICENCE)cambridge-10.1017/S0016756800006580 Kitchen D. E. Department of Environmental Studies, University of Ulster, Jordanstown, Co. Antrim, BT37 0QB, Northern Ireland, U.K. The disequilibrium partial melting and assimilation of Caledonian granite by Tertiary basalt at Barnesmore, Co. Donegal [Elektronische Daten] [D. E. Kitchen] A regional Tertiary basaltic dyke swarm intensifies within a Caledonian granite at Barnesmore, Co. Donegal. Rapid heating along the contact of one (possible feeder) dyke resulted in disequilibrium partial melting of granite wall-rock and the generation of a range in melt composition by the in situ melting of feldspar. The compositional variability of the melt is preserved in a glass containing feldspar spherulites and other quench phases which suggest rapid cooling. During partial melting the trace elements, Rb, Sr, and Ba were mobile and have been concentrated in glassy melted granite close to the contact of one dyke. The textures, mineralogy and geochemistry of dolerite in two dykes indicate localized bulk contamination and mixing with melted granite. This had a particularly marked effect on the crystallization of pyroxene and resulted in a wide range in mineral composition reflecting the degree of contamination. The intensification of a regional dyke swarm in well-jointed granite might control the siting of some major intrusive centres. Granite melted and mixed with basaltic magma may contribute to the evolution of granites in such centres. Copyright © Cambridge University Press 1989 Geological Magazine Cambridge University Press 126/4(1989-07), 397-405 0016-7568 126:4<397 1989 126 GEO https://doi.org/10.1017/S0016756800006580 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S0016756800006580 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Kitchen D. E. Department of Environmental Studies, University of Ulster, Jordanstown, Co. Antrim, BT37 0QB, Northern Ireland, U.K NATIONALLICENCE 773 0- Geological Magazine Cambridge University Press 126/4(1989-07), 397-405 0016-7568 126:4<397 1989 126 GEO CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge