沸斑岩

沸斑岩，又译方沸响岩、方沸斑岩（英语：Blairmorite） 是一种非常罕见的^[1]斑状喷出岩，^[2]以加拿大艾伯塔省西南部的Blairmore（英语：Blairmore, Alberta）社区命名。^[3][4]该矿物以方沸石（英语：Analcime）为主的斑晶、基质矿物为透长石和碱性辉石以及方沸石，辅以榍石，钙铁榴石和霞石组成。沸斑岩是一种长英质的方沸石（foidite）。^[5]Blairmorite 也是一种富含方沸石的响岩。^[6][7]

Blairmorite

喷出岩

来自 Crowsnest Formation 的淡方钠岩标本。 琥珀色矿物是方沸石，浅色矿物是透长石，小的黑色矿物是钙铁榴石石榴石

这种岩石因在世界上独有的两种地质构造中的特性被学界鉴定为喷出岩：在加拿大阿尔伯塔省的Crowsnest层，它与喷发性的集块岩和凝灰共生，而莫桑比克的 Lupata峡谷也有类似的情况。^[2]

参考文献

1. MacKenzie, W.S., Donaldson, C.H. and Guilford, C. Atlas of igneous rocks and their textures. Harlow: Longman. 1982: 121. ISBN 0-582-30082-7.
2. MacKenzie, W.S., Donaldson, C.H. and Guilford, C. (1982). Atlas of igneous rocks and their textures. Harlow: Longman. p. 121. ISBN 0-582-30082-7.
3. Pearce, T.H. (1993). "Analcime phenocrysts in igneous rocks: Primary or secondary? – Discussion" (PDF). American Mineralogist. 78: 225–229.
4. Johannsen, A. 1933. A descriptive petrography of the igneous rocks, Appendix III, p. 244. Univ. of Chicago Press.
5. Le Maitre, R.W. (editor) (2002). Igneous Rocks — A Classification and Glossary of Terms (2nd ed.). Cambridge: Cambridge University Press. pp. 55, 64. ISBN 0-521-66215-X.
6. Peterson, T.D.; Currie, K.L. (1993). Analcite-bearing igneous rocks from the Crowsnest Formation, southwestern Alberta (Current Research report 93-B1) (PDF). Geological Survey of Canada. pp. 51–56.
7. Deer, W.A.; Howie, R.A.; Zussman, J. (2013). An Introduction to the Rock-Forming Minerals (3rd ed.). London: Mineralogical Society. ISBN 9780903056274.