Cr-spinel seam petrogenesis in the rum layered suite, NWScotland: Cumulate assimilation and in situ crystallization in a deforming crystal mush

Journal of Petrology

Volumn 51, Issue 6, 2010, Pages 1171-1201

  O'Driscoll, Brian ^a   Emeleus, C Henry ^b   Donaldson, Colin H ^c   Daly, J Stephen ^a  

^a UNIVERSITY COLLEGE DUBLIN   (Ireland)

^b DURHAM UNIVERSITY   (United Kingdom)

^c UNIVERSITY OF ST ANDREWS   (United Kingdom)

Author keywords

Cr spinel seam; Cumulate assimilation; In situ crystallization; Rum layered suite

Indexed keywords

CHEMICAL ANALYSIS; CHEMICAL COMPOSITION; CHROMIUM; CRYSTALLIZATION; DEFORMATION; DISSOLUTION; EMPLACEMENT; LAYERED INTRUSION; MAGMA ASSIMILATION; PETROGENESIS; PETROGRAPHY; PICRITE; SPINEL; TEXTURE;

SCOTLAND; UNITED KINGDOM;

EID: 77954004429     PISSN: 00223530     EISSN: 14602415     Source Type: Journal    
DOI: 10.1093/petrology/egq013     Document Type: Article

References (68)

1. 2: Phase relations among olivine, pyroxene, silica and spinel in air at 1atm. Carnegie Institution of WashingtonYear Book 73, 317-322.
2. Ballhaus, C., Berry, R. F. & Green, D. H. (1991). High pressure experimental calibration of the olivine-orthopyroxene-spinel oxygen geobarometer: implications for the oxidation state of the upper mantle. Contributions to Mineralogy and Petrology 107, 27-40.
3. Barnes, S. J. (1998). Chromite in komatiites, 1. Magmatic controls on crystallisation and composition. Journal of Petrology 39(10), 1689-1720.
4. Barnes, S. J. & Roeder, P. L. (2001). The range of spinel compositions in terrestrial mafic and ultramafic rocks. Journal of Petrology 42(12), 2279-2302.
5. Bell, B. R. & Claydon, R. V. (1992). The cumulus and post-cumulus evolution of chrome-spinels in ultrabasic layered intrusions; evidence from the Cuillin Igneous Complex, Isle of Skye, Scotland. Contributions to Mineralogy and Petrology 112,242-253.
6. Boorman, S., Boudreau, A. & Kruger, F. J. (2004). The Lower Zone- Critical Zone transition of the Bushveld Complex: a quantitative textural study. Journal of Petrology 45,1209-1235.
7. Brown, G. M. (1956). The layered ultrabasic rocks of Rhum, Inner Hebrides. Philosophical Transactions of the Royal Society of London, Series B 240,1-53.
8. Butcher, A. R., Pirrie, D., Prichard, H. M. & Fisher, P. (1999). Platinum-group mineralization in the Rum Layered Intrusion, Scottish Hebrides, UK. Journal of the Geological Society, London 156, 213-216.
9. Campbell, I. H. (1986). A dynamic model for the potholes of the Merensky Reef. Economic Geology 81, 1118-1125.
10. Donaldson, C. H. (1974). Olivine crystal types in harrisitic rocks of the Rhum pluton and in Archean spinifex rocks. Geological Society of America Bulletin 85,1721-1726.
11. Donaldson, C. H. (1975). A petrogenetic study of harrisite in the Isle of Rhum pluton, Scotland. Ph.D. thesis University of St Andrews, 138 p.
12. 3+ concentrations in ferromagnesian silicates and oxides from microprobe analyses, using stoichiometric criteria. Mineralogical Magazine 51, 431-435.
13. Dunham, A. C. & Wilkinson, F. C. F. (1985). Sulphide droplets and the Unit 11/12 chrome-spinel band, Rhum: a mineralogical study. Geological Magazine 122, 539-548.
14. Emeleus, C. H. (1987). The Rhum Layered Complex, Inner Hebrides, Scotland. In: Parsons, I. (ed.) Origins of Igneous Layering. Dordrecht: D. Reidel, pp. 263-286.
15. Emeleus, C. H. (1997). Geology of Rum and the adjacent islands, Memoir of the British Geological Survey, Sheet 60 (Scotland).
16. Emeleus, C. H., Cheadle, M. J., Hunter, R. H., Upton, B. G. J. & Wadsworth, W. J. (1996). The Rum Layered Suite. In: Cawthorn, R. G. (ed.) Layered Igneous Rocks. Amsterdam: Elsevier, pp. 403-440.
17. Henderson, P. (1975). Reaction trends shown by chrome-spinels of the Rhum layered intrusion. Geochimica et Cosmochimica Acta 39, 1035-1044.
18. Henderson, P. & Suddaby, P. (1971). The nature and origin of chromespinel of the Rhum layered intrusion. Contributions to Mineralogy and Petrology 33, 21-31.
19. Henderson, P. & Wood, R. J. (1981). Reaction relationships of chrome-spinels in igneous rocksçfurther evidence from the layered intrusions of Rum and Mull, Inner Hebrides, Scotland. Contributions to Mineralogy and Petrology 78,225-229.
20. Higgins, M. D. (1994). Numerical modelling of crystal shapes in thin-sections; estimation of crystal habit and true size. American Mineralogist 79, 113-119.
21. Higgins, M. D. (1998). Origin of anorthosite by textural coarsening: quantitative measurements of a natural sequence of textural development. Journal of Petrology 39,1307-1323.
22. Higgins, M. D. (2000). Measurement of crystal size distributions. American Mineralogist 85, 1105-1116.
23. Higgins, M. D. (2002). The role of textural coarsening in the development of the Kigaplait layered mafic intrusion, Labrador, Canada: a crystal size distribution study. Contributions to Mineralogy and Petrology 144, 314-330.
24. Higgins, M. D. (2006a). Use of appropriate diagrams to determine if crystal size distributions (CSD) are dominantly semi-logarithmic, lognormal or fractal (scale invariant). Journal of Volcanology and Geothermal Research 154, 8-16.
25. Higgins, M. D. (2006b). Quantitative Textural Measurements in Igneous and Metamorphic Petrology. Cambridge: Cambridge University Press, 265 p.
26. Holness, M. B. (2005). Spatial constraints on magma chamber replenishment events from textural observations of cumulates: the Rum Layered Intrusion, Scotland. Journal of Petrology 46, 1585-1600.
27. Holness, M. B. (2007). Textural immaturity of cumulates as an indicator of magma chamber processes: infiltration and crystal accumulation in the Rum Eastern Layered Intrusion. Journal of the Geological Society, London 164, 529-539.
28. Holness, M. B. & Winpenny, B. (2009). The Unit 12 allivalite, Eastern Layered Intrusion, Isle of Rum: a textural and geochemical study of an open-system magma chamber. Geological Magazine 146(3), 437-450.
29. Holness, M. B., Hallworth, M. A., Woods, A. & Sides, R. E. (2007). Infiltration metasomatism of cumulates by intrusive magma replenishment: the Wavy Horizon, Isle of Rum, Scotland. Journal of Petrology 48, 563-587.
30. Hulbert, L. J. & Von Gruenewaldt, G. (1985). Textural and compositional features of chromite in the lower and critical zones of the Bushveld Complex south of Potgietersrus. Economic Geology 80, 872-895.
31. Hunter, R. H. (1987). Textural equilibrium in layered igneous rocks. In: Parsons, I. (ed.) Origins of Igneous Layering. Dordrecht: D. Reidel, pp. 473-503.
32. Huppert, H. E. & Sparks, R. S. J. (1980). The fluid dynamics of a basaltic magma chamber replenished by an influx of hot, dense, ultrabasic liquid. Contributions to Mineralogy and Petrology 75, 279-289.
33. Irvine, T. N. (1965). Chromian-spinel as a petrogenetic indicator. Part 1. Theory. Canadian Journal of Earth Sciences 2, 648-672.
34. Irvine, T. N. (1967). Chromian-spinel as a petrogenetic indicator. Part 2. Petrologic applications. Canadian Journal of Earth Sciences 4,71-103.
35. Irvine, T. N. (1975). Crystallisation sequences in the Muskox intrusion and other layered intrusionsc-II. Origin of chromitite layers and other similar deposits of other magmatic ores. Geochimica et Cosmochimica Acta 39, 991-1020.
36. Irvine,T.N.(1977a). Origin of chromitite layers in the Muskox intrusion and other stratiform intrusions: A new interpretation. Geology 5,273-277.
37. 2. Carnegie Institution of Washington Yearbook 76, 465-472.
38. Irvine, T. N. (1980). Magmatic infiltration metasomatism and double-diffusive fractional crystallisation, and adcumulus growth in the Muskox intrusion and other layered intrusions. In: Hargraves, R. B. (ed.) Physics of Magmatic Processes. Princeton, NJ: Princeton University Press, pp. 325-383.
39. Jackson, E. D. (1961). Primary textures and mineral associations in the Ultramafic Zone of the Stillwater Complex, Montana. US Geological Survey, Professional Papers 358,1-106.
40. Jerram, D. A., Cheadle, M. J., Hunter, R. H. & Elliott, M. T. (1996). The spatial distribution of grains and crystals in rocks. Contributions to Mineralogy and Petrology 125(1), 60-74.
41. Jerram, D. A., Cheadle, M. J. & Philpotts, A. R. (2003). Quantifying the building blocks of igneous rocks: are clustered crystal frameworks the foundation? Journal of Petrology 44, 2033-2051.
42. Lee, C. A. (1981). Post-depositional structures in the Bushveld Complex mafic sequence. Journal of the Geological Society, London 138,327-342.
43. Marsh, B. D. (1998). On the interpretation of crystal size distributions in magmatic systems. Journal of Petrology 39, 553-599.
44. McClurg, J. E. (1982). Petrology and evolution of the northern part of the Rhum Ultrabasic Complex. Ph.D, thesis, University of Edinburgh.
45. Morse, S. A. (1980). Basalts and Phase Diagrams. New York: Springer, 493 p.
46. O'Driscoll, B., Donaldson, C. H., Troll, V. R., Jerram, D. A. & Emeleus, C. H. (2007a). An origin for harrisitic and granular olivine from the Rum Layered Suite, NW Scotland: A crystal size distribution study. Journal of Petrology 48(2), 253-270.
47. O'Driscoll, B., Hargraves, R. B., Emeleus, C. H., Troll, V. R., Donaldson, C. H. & Reavy, R. J. (2007b). Magmatic lineations inferred from anisotropy of magnetic susceptibility fabrics in Units 8, 9, and 10 of the Rum Eastern Layered Series, Scotland. Lithos 98, 27-44.
48. O'Driscoll, B., Donaldson, C. H., Daly, J. S. & Emeleus, C. H. (2009a). The roles of melt infiltration and cumulate assimilation in the formation of anorthosite and a Cr-spinel seam in the Rum Eastern Layered Intrusion. Lithos 111,6-20.
49. O'Driscoll, B., Day, J. M. D., Daly, J. S., Walker, R. J. & McDonough, W. F. (2009b). Rhenium-osmium isotopes and platinum-group elements in the Rum Layered Suite, Scotland: Implications for Cr-spinel seam formation and the composition of the Iceland mantle anomaly. Earth and Planetary Science Letters 286, 41-51.
50. Power, M. R., Pirrie, D., Anderson, J. C. O. & Butcher, A. R. (2000). Stratigraphical distribution of platinum-group minerals in the Eastern Layered Series, Rum, Scotland. Mineralium Deposita 35, 762-775.
51. Putnis, A. & Price, G. D. (1979). The nature and significance of exsolved phases in some chrome spinels from the Rhum layered intrusion. Mineralogical Magazine 43, 519-526.
52. O2estimation for Albanian Cr-spinels. American Mineralogist 91, 907-916.
53. Roeder, P. L. & Campbell, I. H. (1985). The effect of postcumulus reactions on compositions of chrome-spinels from the Jimberlana intrusion. Journal of Petrology 26(3), 763-786.
54. Scowen,P.A.H.,Roeder,P.L.&Helz,R.T.(1991).Reequilibration of chromite within the Kilauea Iki lava lake, Hawaii. Contributions to Mineralogy and Petrology 107,8-20.
55. Spandler, C., Mavrogenes, J. & Arculus, R. (2005). Origin of chromitites in layered intrusions: Evidence from chromite-hosted melt inclusions from the Stillwater Complex. Geology 33,893-896.
56. Sparks,R.S.J.,Huppert,H.E.,Kerr,R.C.,McKenzie,D.P.& Tait, S. R. (1985). Postcumulus processes in layered intrusions. Geological Magazine 122, 555-568.
57. Tait, S. R. (1985). Fluid dynamic and geochemical evolution of cyclic Unit 10, Rhum, Eastern Layered Series. Geological Magazine 122, 469-484.
58. Tepley, F. J. & Davidson, J. P. (2003). Mineral-scale Sr-isotope constraints on magma evolution and chamber dynamics in the Rum layered intrusion, Scotland. Contributions to Mineralogy and Petrology 145, 628-641.
59. Turner, J. S. & Campbell, I. H. (1986). Convection and mixing in magma chambers. Earth-Science Reviews 23, 255-352.
60. Turner, S., George, R., Jerram, D. A., Hawkesworth, C. & Carpenter, N. (2003). Case studies of plagioclase growth and residence times in island arc lavas from Tonga and the Lesser Antilles and a model to reconcile discordant age information. Earth and Planetary Science Letters 214, 279-294.
61. Upton, B. G. J., Skovgaard, A. C., McClurg, J., Kirstein, L., Cheadle, M., Emeleus, C. H., Wadsworth, W. J. & Fallick, A. E. (2002). Picritic magmas and the Rum ultramafic complex, Scotland. Geological Magazine 139,437-452.
62. Volker, J. A. & Upton, B. G. J. (1990). The structure and petrogenesis of the Trallval and Ruinsival areas of the Rhum ultrabasic complex. Transactions of the Royal Society of Edinburgh: Earth Sciences 81, 69-88.
63. Voordouw, R., Gutzmer, J. & Beukes, N. J. (2009). Intrusive origin for Upper Group (UG1, UG2) stratiform chromitite seams in the Dwars River area, Bushveld Complex, South Africa. Mineralogy and Petrology 97(1-2), 75-94.
64. Wadsworth, W. J. (1961). The layered ultrabasic rocks of south-west Rhum, Inner Hebrides. Philosophical Transactions of the Royal Society of London, Series B 244, 21-64.
65. Wager, L. R., Brown, G. M. & Wadsworth, W. J. (1960). Types of igneous cumulates. Journal of Petrology 1, 73-85.
66. Waters, C. & Boudreau, A. E. (1996). A reevaluation of crystal-size distributions in chrome-spinel cumulates. American Mineralogist 81, 1452-1459.
67. Young, I. M. (1984). Mixing of supernatant and interstitial fluids in the Rhum layered intrusion. Mineralogical Magazine 48, 345-350.
68. Zieg, M. J. & Marsh, B. D. (2002). Crystal size distributions and scaling laws in the quantification of igneous textures. Journal of Petrology 43(1), 85-101.