Variations in the geochemistry of magmatism on the East Pacific Rise at 10°30'N since 800 ka

Earth and Planetary Science Letters

Volumn 168, Issue 1-2, 1999, Pages 45-63

  Regelous, M ^a   Niu, Y ^a   Wendt, J I ^a   Batiza, R ^b   Greig, A ^a   Collerson, K D ^a  

^a UNIVERSITY OF QUEENSLAND   (Australia)

^b UNIVERSITY OF HAWAII   (United States)

Author keywords

East Pacific Rise; Geochemistry; Igneous activity; Magma chambers; Major elements; Volcanic rocks

Indexed keywords

CHEMICAL COMPOSITION; IGNEOUS GEOCHEMISTRY; LAVA; MAGMATISM; MID-OCEAN RIDGE;

PACIFIC OCEAN;

EID: 0033617557     PISSN: 0012821X     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0012-821X(99)00048-5     Document Type: Article

References (49)

1. Detrick R.S., Buhl P., Vera E., Mutter J., Orcutt J., Madsen J., Brocher T. Multi-channel seismic imaging of a crustal magma chamber along the East Pacific Rise. Nature. 326:1987;35-41.
2. Kent G.M., Harding A.J., Orcutt J.A. Evidence for a smaller magma chamber beneath the East Pacific Rise at 9°30′N. Nature. 344:1990;650-653.
3. Natland J.H. Effect of axial magma chambers beneath spreading centers on the compositions of basaltic rocks. DSDP Init. Rep. 54:1980;833-850.
4. Sinton J.M., Detrick R.S. Mid-ocean ridge magma chambers. J. Geophys. Res. 97:1992;197-216.
5. G. Thompson, W.B. Bryan, S.E. Humphris, Axial volcanism on the East Pacific Rise, 10-12°N, in: A.D. Saunders, M.J. Norry (Eds.), Magmatism in the Ocean Basins, Geol. Soc. Spec. Publ. 42 (1989) 181-200.
6. Batiza R., Niu Y. Petrology and magma chamber processes at the East Pacific Rise ~9°30′N. J. Geophys. Res. 97:1992;6779-6797.
7. Whitehead J.A., Dick H.J.B., Schouten H. A mechanism for magmatic accretion under spreading centers. Nature. 312:1984;146-147.
8. Langmuir C.H., Bender J.F., Batiza R. Petrological and tectonic segmentation of the East Pacific Rise, 5°30′-14°30′N. Nature. 322:1986;422-429.
9. Macdonald K.C., Fox P.J., Perram L.J., Eisen M.F., Haymon R.M., Miller S.P., Carbotte S.M., Cormier M.-H., Shor A.N. A new view of the mid-ocean ridge from the behaviour of ridge-axis discontinuities. Nature. 335:1988;217-225.
10. Lonsdale P. Nontransform offsets of the Pacific-Cocos plate boundary and their traces on the rise flank. Geol. Soc. Am. Bull. 96:1985;313-327.
11. Niu Y., Batiza R. An empirical method for calculating melt compositions produced beneath mid-ocean ridges: application for axis and off-axis (seamounts) melting. J. Geophys. Res. 96:1991;21753-21777.
12. Sinton J.M., Smaglik S.M., Mahoney J.J. Magmatic processes at superfast spreading mid-ocean ridges: glass compositional variations along the East Pacific Rise 13-23°S. J. Geophys. Res. 96:1991;6133-6155.
13. Bach W., Hegner E., Erzinger J., Satir M. Chemical and isotopic variations along the superfast spreading East Pacific Rise from 6° to 30° Contrib. Mineral. Petrol. 116:1994;365-380.
14. R. Batiza, Magmatic segmentation of mid-ocean ridges: a review, in: C.J. MacLeod, P.A. Tyler, C.L. Walker (Eds.), Tectonic, Magmatic, Hydrothermal and Biological Segmentation of Mid-Ocean Ridges, Geol. Soc. Spec. Publ. 118 (1996) 103-130.
15. Hekinian R., Thompson G., Bideau D. Axial and off-axial heterogeneity of basaltic rocks from the East Pacific Rise at 12°35′N-12°51′N and 11°26′N-11°30′N. J. Geophys. Res. 94:1989;17437-17463.
16. Carbotte S., Macdonald K. East Pacific Rise 8°-10°30′N: evolution of ridge segments and discontinuities from SeaMARC II and three-dimensional magnetic studies. J. Geophys. Res. 97:1992;6959-6982.
17. Reynolds J.R., Langmuir C.H., Bender J.F., Kastens K.A., Ryan W.B.F. Spatial and temporal variability in the geochemistry of basalts from the East Pacific Rise. Nature. 359:1992;493-499.
18. Hekinian R., Walker D. Diversity and spatial zonation of volcanic rocks from the East Pacific Rise near 21°N. Contrib. Mineral. Petrol. 96:1987;265-280.
19. Karsten J.L., Delaney J.R., Rhodes J.M., Liias R.A. Spatial and temporal evolution of magmatic systems beneath the Endeavour Segment, Juan de Fuca Ridge: tectonic and petrologic constraints. J. Geophys. Res. 95:1990;19235-19256.
20. Perfit M.R., Fornari D.J., Smith M.C., Bender J.F., Langmuir C.H., Haymon R.M. Small-scale spatial and temporal variations in mid-ocean ridge crest magmatic processes. Geology. 22:1994;375-379.
21. Batiza R., Niu Y., Karsten J.L., Boger W., Potts E., Norby L., Butler R. Steady and non-steady state magma chambers below the East Pacific Rise. Geophys. Res. Lett. 23:1996;221-224.
22. Stakes D.S., Shervais J.W., Hopson C.A. The volcanic-tectonic cycle of the FAMOUS and AMAR valleys, Mid-Atlantic Ridge (36°47′N): evidence from basalt glass and phenocryst compositional variations for a steady-state magma chamber beneath the valley midsections, AMAR 3. J. Geophys. Res. 89:1984;6995-7028.
23. Smith M.C., Perfit M.R., Jonasson I.R. Petrology and geochemistry of basalts from the southern Juan de Fuca Ridge: controls on the spatial and temporal evolution of mid-ocean ridge basalt. J. Geophys. Res. 99:1994;4787-4812.
24. Begnaud M.L., McClain J.S., Barth G.A., Orcutt J.A., Harding A.J. Velocity structure from forward modelling of the eastern ridge-transform intersection area of the Clipperton Fracture Zone, East Pacific Rise. J. Geophys. Res. 102:1997;7803-7820.
25. Gallo D.G., Fox P.J., Macdonald K.C. A Seabeam investigation of the Clipperton Transform Fault: the morpho-tectonic expression of a fast slipping transform boundary. J. Geophys. Res. 91:1986;3455-3467.
26. ARGO-RISE Group, Geological mapping of the East Pacific Rise axis (10°19′-11°53′N) using the ARGO and ANGUS imaging systems, Can. Mineral. 26 (1988) 467-486.
27. Macdonald K.C., Fox P.J. The axial summit graben and cross-sectional shape of the East Pacific Rise as indicators of axial magma chambers and recent volcanic eruptions. Earth Planet. Sci. Lett. 88:1988;119-131.
28. K.C. Macdonald, Tectonic and magmatic processes on the East Pacific Rise, in: E.L. Winterer, D.M. Hussong, R.W. Decker, (Eds.), The Eastern Pacific Ocean and Hawaii: The Geology of North America, Vol. N, Geological Society of America, Boulder, CO, 1989, pp. 93-110.
29. Hooft E.E.E., Detrick R.S., Kent G.M. Seismic structure and indicators of magma budget along the southern East Pacific Rise. J. Geophys. Res. 102:1997;27319-27340.
30. Barth G.A., Mutter J.C. Variability in oceanic crustal thickness and structure: multichannel seismic reflection results from the northern East Pacific Rise. J. Geophys. Res. 101:1996;17951-17975.
31. Niu Y., Batiza R. Trace element evidence from seamounts for recycled oceanic crust in the eastern equatorial Pacific mantle. Earth Planet. Sci. Lett. 148:1997;471-484.
32. Goldstein S.J., Perfit M.R., Batiza R., Fornari D.J., Murrell M.T. Off-axis volcanism at the East Pacific Rise based on uranium-series dating of basalts. Nature. 367:1994;157-159.
33. Macdonald K.C., Fox P.J., Alexander R.T., Pockalny R., Gente P. Volcanic growth faults and the origin of Pacific abyssal hills. Nature. 380:1996;125-129.
34. 39Ar incremental heating method. Geophys. Res. Lett. 21:1994;1927-1930.
35. Fornari D.J., Perfit M.R., Malahoff A., Embley R. Geochemical studies of abyssal lavas recovered by DSRV Alvin from eastern Galapagos Rift, Inca Transform, and Ecuador Rift, 1, Major element variations in natural glasses and spacial distribution of lavas. J. Geophys. Res. 88:1983;10519-10529.
36. Chadwick W.W. Jr., Embley R.W. Lava flows from a mid-1980s submarine eruption on the Cleft segment, Juan de Fuca Ridge. J. Geophys. Res. 99:1994;4761-4776.
37. Sinton J.M., Wilson D.S., Christie D.M., Hey R.N., Delaney J.R. Petrologic consequences of rift propagation on oceanic spreading centers. Earth Planet. Sci. Lett. 62:1983;193-207.
38. Langmuir C.H., Bender J.F. The geochemistry of oceanic basalts in the vicinity of transform faults: observations and implications. Earth Planet. Sci. Lett. 69:1984;107-127.
39. Klein E.M. The Clipperton Transform Team, The CHEPR Team, Geochemistry of basalts collected during Alvin dives within and adjacent to the Clipperton Transform Fault (19°N East Pacific Rise). Eos. 68:1987;1540.
40. Barth G.A., Kastens K.A., Klein E.M. The origin of bathymetric highs at ridge-transform intersections: a multi-disciplinary case study at the Clipperton Fracture Zone. Mar. Geophys. Res. 16:1994;1-50.
41. Harpp K., White W.M., Batiza R. Isotopic study of contrasting magmatic suites: The East Pacific Rise at 9°30′N and the MAR in the FAMOUS area. Eos. 71:1990;658.
42. Smith M.C., Perfit M.R., Embley R.W., Chadwick W.W. Interpretation of magmatic activity and crustal accretion along the CoAxial segment and Axial Seamount North Rift zone: using combined acoustic and geochemical data to map the seafloor at the scale of individual flows. Eos. 78:1997;F676.
43. Christie D.M., Sinton J.M. Evolution of abyssal lavas along propagating segments of the Galapagos spreading center. Earth Planet. Sci. Lett. 56:1981;321-335.
44. Scheirer D.S., Macdonald K.C. Variation in cross-sectional area of the axial ridge along the East Pacific Rise: evidence for the magmatic budget of a fast spreading center. J. Geophys. Res. 98:1993;7871-7886.
45. Crane K. The spacing of ridge axis highs: dependence upon diapiric processes in the underlying asthenosphere. Earth Planet. Sci. Lett. 72:1985;405-414.
46. Perram L.J., Macdonald K. A one-million year history of the 11°45′N East Pacific Rise discontinuity. J. Geophys. Res. 95:1990;21363-21381.
47. Fornari D.J., Gallo D.G., Edwards M.H., Madsen J.A., Perfit M.R., Shor A.N. Structure and topography of the Siqueiros transform fault system: evidence for the development of intra-transform spreading centers. Mar. Geophys. Res. 11:1989;263-299.
48. Sims K.W.W., Goldstein S.J., Fornari D.J., Murrell M.T., Perfit M., Hart S.R. U-series analyses of young lavas from 9-10°N East Pacific Rise: constraints on magma transport and storage times beneath the ridge axis (abstr.). Eos. 78:1997;F792.
49. Schouten H., Klitgord K.D., Whitehead J.A. Segmentation of mid-ocean ridges. Nature. 317:1985;225-229.