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Volumn 259, Issue , 2006, Pages 1-6

The Afar volcanic province within the East African Rift System: Introduction

Author keywords

[No Author keywords available]

Indexed keywords

RIFT ZONE; RIFTING; VOLCANOLOGY;

EID: 33745768021     PISSN: 03058719     EISSN: None     Source Type: Book Series    
DOI: 10.1144/GSL.SP.2006.259.01.01     Document Type: Article
Times cited : (41)

References (56)
  • 1
    • 0028574403 scopus 로고
    • New ideas on the Kenya rift based on the inversion of the combined dataset of the 1985 and 1989/90 seismic tomography experiments
    • Achauer & the KRISP teleseismic working group
    • Achauer & the KRISP teleseismic working group 1994. New ideas on the Kenya rift based on the inversion of the combined dataset of the 1985 and 1989/90 seismic tomography experiments. Tectonophysics, 236, 305-329.
    • (1994) Tectonophysics , vol.236 , pp. 305-329
  • 2
    • 15944377856 scopus 로고    scopus 로고
    • Structure and evolution of the eastern Gulf of Aden conjugate margins from seismic reflection data
    • doi:10.1111/j.1365-246X.2005.02524.x
    • d'Acremont, E., Leroy, S., Beslier, M.-O., Bellahsen, N., Fournier, M., Robin, C., Maia, M. & Gente, P. 2005. Structure and evolution of the eastern Gulf of Aden conjugate margins from seismic reflection data. Geophysical Journal International, 160, 869-890, doi:10.1111/ j.1365-246X.2005.02524.x
    • (2005) Geophysical Journal International , vol.160 , pp. 869-890
    • d'Acremont, E.1    Leroy, S.2    Beslier, M.-O.3    Bellahsen, N.4    Fournier, M.5    Robin, C.6    Maia, M.7    Gente, P.8
  • 3
    • 0033843527 scopus 로고    scopus 로고
    • The tectonic and geomagnetic significance of paleomagnetic observations from volcanic rocks from central Afar, Africa
    • Acton, G.D., Tessema, A., Jackson, M. & Bilham, R. 2000. The tectonic and geomagnetic significance of paleomagnetic observations from volcanic rocks from central Afar, Africa. Earth and Planetary Science Letters, 180, 225-241.
    • (2000) Earth and Planetary Science Letters , vol.180 , pp. 225-241
    • Acton, G.D.1    Tessema, A.2    Jackson, M.3    Bilham, R.4
  • 4
    • 0031464486 scopus 로고    scopus 로고
    • Spatial and temporal variation of seismicity in the Horn of Africa from 1960 to 1993
    • Ayele, A. & Kulhanek, O. 1997. Spatial and temporal variation of seismicity in the Horn of Africa from 1960 to 1993. Geophysical Journal International, 130, 805-810.
    • (1997) Geophysical Journal International , vol.130 , pp. 805-810
    • Ayele, A.1    Kulhanek, O.2
  • 5
    • 0029749980 scopus 로고    scopus 로고
    • A brief Oligocene period of flood volcanism in Yemen: Implications for the duration and rate of continental flood volcanism at the Afro-Arabian triple junction
    • Baker, J., Snee, L. & Menzies, M. 1996a. A brief Oligocene period of flood volcanism in Yemen: implications for the duration and rate of continental flood volcanism at the Afro-Arabian triple junction. Earth and Planetary Science Letters, 138, 39-55.
    • (1996) Earth and Planetary Science Letters , vol.138 , pp. 39-55
    • Baker, J.1    Snee, L.2    Menzies, M.3
  • 6
    • 0030482752 scopus 로고    scopus 로고
    • Sr-Nd-Pb isotopic and trace element evidence for crustal contamination of plume-derived flood basalts: Oligocene flood volcanism in western Yemen
    • Baker, J., Thirlwall, M. & Menzies, M.A. 1996b. Sr-Nd-Pb isotopic and trace element evidence for crustal contamination of plume-derived flood basalts: Oligocene flood volcanism in western Yemen. Geochimica et Cosmochimica Acta, 60, 2559-2581.
    • (1996) Geochimica Et Cosmochimica Acta , vol.60 , pp. 2559-2581
    • Baker, J.1    Thirlwall, M.2    Menzies, M.A.3
  • 7
    • 6044277930 scopus 로고    scopus 로고
    • Magmatic segmentation at mid-ocean ridges: A review
    • MacLeod, C. et al. (eds) Geological Society, London, Special Publications
    • Batiza, R. 1996. Magmatic segmentation at mid-ocean ridges: A review. In: MacLeod, C. et al. (eds) Tectonic, Magmatic, Hydrothermal, and Biological Segmentation of Mid-Ocean Ridges. Geological Society, London, Special Publications, 118, 103-130.
    • (1996) Tectonic, Magmatic, Hydrothermal, and Biological Segmentation of Mid-Ocean Ridges , vol.118 , pp. 103-130
    • Batiza, R.1
  • 10
    • 21944434946 scopus 로고    scopus 로고
    • Consequences of asthenospheric variability on continental rifting
    • Karner, G.D., Taylor, B., Driscoll, N.W., & Kohlstedy, D.L. (eds) Columbia University Press, New York
    • Buck, W.R. 2004. Consequences of asthenospheric variability on continental rifting. In: Karner, G.D., Taylor, B., Driscoll, N.W., & Kohlstedy, D.L. (eds) Rheology and Deformation of the Lithosphere at Continental Margins. Columbia University Press, New York, 1-30.
    • (2004) Rheology and Deformation of the Lithosphere at Continental Margins , pp. 1-30
    • Buck, W.R.1
  • 11
    • 0027385785 scopus 로고
    • Mantle sources and magma -continental crust interactions during early Red Sea-Aden rifting in Southern Yemen: Elemental and Sr, Nd, Pb isotope evidence
    • Chazot, G. & Bertrand, H. 1993. Mantle sources and magma -continental crust interactions during early Red Sea-Aden rifting in Southern Yemen: elemental and Sr, Nd, Pb isotope evidence. Journal of Geophysical Research, 98, 1818-1835.
    • (1993) Journal of Geophysical Research , vol.98 , pp. 1818-1835
    • Chazot, G.1    Bertrand, H.2
  • 12
    • 0033522122 scopus 로고    scopus 로고
    • Evidence for motion between Nubian and Somalia along the Southwest Indian Ridge
    • Chu, D.H. & Gordon, R.G. 1999. Evidence for motion between Nubian and Somalia along the Southwest Indian Ridge. Nature, 298, 64-66.
    • (1999) Nature , vol.298 , pp. 64-66
    • Chu, D.H.1    Gordon, R.G.2
  • 13
    • 0018911545 scopus 로고
    • Age of volcanism and rifting in southwestern Ethiopia
    • Davidson, A. & Rex, D.C. 1980. Age of volcanism and rifting in southwestern Ethiopia. Nature, 283, 657-658.
    • (1980) Nature , vol.283 , pp. 657-658
    • Davidson, A.1    Rex, D.C.2
  • 14
    • 0036252980 scopus 로고    scopus 로고
    • Are buoancy forces important during the formation of rifted margins?
    • Davis, M. & Kusznir, N.J. 2002. Are buoancy forces important during the formation of rifted margins? Geophysical Journal International, 149,524-533.
    • (2002) Geophysical Journal International , vol.149 , pp. 524-533
    • Davis, M.1    Kusznir, N.J.2
  • 15
    • 0030432765 scopus 로고
    • Three-dimensional dynamical model of continental rift propagation and margin formation
    • Dunbar, J. & Sawyer, D. 1989. Three-dimensional dynamical model of continental rift propagation and margin formation. Journal of Geophysical Research, 101, 27845-27863.
    • (1989) Journal of Geophysical Research , vol.101 , pp. 27845-27863
    • Dunbar, J.1    Sawyer, D.2
  • 17
    • 0032558727 scopus 로고    scopus 로고
    • Cenozoic magmatism throughtout east Africa resulting from the impact of a single plume
    • Ebinger, C.J. & Sleep, N.H. 1998. Cenozoic magmatism throughtout east Africa resulting from the impact of a single plume. Nature, 395, 788-791.
    • (1998) Nature , vol.395 , pp. 788-791
    • Ebinger, C.J.1    Sleep, N.H.2
  • 18
    • 84879882976 scopus 로고    scopus 로고
    • Continental breakup in magmatic provinces: An Ethiopian example
    • Ebinger, C.J. & Casey, M. 2001. Continental breakup in magmatic provinces: An Ethiopian example. Geology, 29, 527-530.
    • (2001) Geology , vol.29 , pp. 527-530
    • Ebinger, C.J.1    Casey, M.2
  • 19
    • 0031708698 scopus 로고    scopus 로고
    • Source parameters of large African earthquakes; implications for crustal theology and regional kinmeatics
    • Foster, A.N. & Jackson, J.A. 1999. Source parameters of large African earthquakes; implications for crustal theology and regional kinmeatics. Geophysical Journal International, 134, 422-428.
    • (1999) Geophysical Journal International , vol.134 , pp. 422-428
    • Foster, A.N.1    Jackson, J.A.2
  • 20
    • 2142808403 scopus 로고    scopus 로고
    • East African Rift System plume structure: Insights from Quaternary mafic lavas of Turkana, Kenya
    • Furman, T., Bryce, J.G., Karson, J. & Iotti, A. 2004. East African Rift System plume structure: insights from Quaternary mafic lavas of Turkana, Kenya. Journal of Petrology, 45, 1069-1088.
    • (2004) Journal of Petrology , vol.45 , pp. 1069-1088
    • Furman, T.1    Bryce, J.G.2    Karson, J.3    Iotti, A.4
  • 21
    • 33646872239 scopus 로고    scopus 로고
    • Tertiary mafic lavas of Turkana, Kenya: Constraints on temporal evolution of the EARS and the occurrence of HIMU volcanism in Africa
    • (in press)
    • Furman, T., Kaleta, K.M. & Bryce, J.G. 2006a. Tertiary mafic lavas of Turkana, Kenya: constraints on temporal evolution of the EARS and the occurrence of HIMU volcanism in Africa. Journal of Petrology (in press).
    • (2006) Journal of Petrology
    • Furman, T.1    Kaleta, K.M.2    Bryce, J.G.3
  • 22
    • 33745775061 scopus 로고    scopus 로고
    • Heads and tails: 30 Ma of the Afar plume
    • Yirgu, G., Ebinger, C.J. & Maguire, P.K.H. (eds) Geological Society, London Special Publications
    • Furman, T., Bryce, J., Rooney, T., Hanan, B., Yirgu, G. & Ayalew, D. 2006b. Heads and tails: 30 Ma of the Afar plume. In: Yirgu, G., Ebinger, C.J. & Maguire, P.K.H. (eds) The Afar Volcanic Province within the East Affican Rift System. Geological Society, London Special Publications, 259, 95-119.
    • (2006) The Afar Volcanic Province Within the East Affican Rift System , vol.259 , pp. 95-119
    • Furman, T.1    Bryce, J.2    Rooney, T.3    Hanan, B.4    Yirgu, G.5    Ayalew, D.6
  • 23
    • 84879879128 scopus 로고    scopus 로고
    • Earliest magmatism in Ethiopia: Evidence for two mantle plumes in one flood basalt province
    • George, R., Rogers, N. & Kelly, S. 1998. Earliest magmatism in Ethiopia: evidence for two mantle plumes in one flood basalt province. Geology, 26, 923-926.
    • (1998) Geology , vol.26 , pp. 923-926
    • George, R.1    Rogers, N.2    Kelly, S.3
  • 24
    • 0030736852 scopus 로고    scopus 로고
    • Global seismic tomography; a snapshot of convection in the Earth
    • Grand, S.P., van der Hilst, R.D. & Widiyantoro, S. 1997. Global seismic tomography; a snapshot of convection in the Earth. GSA Today, 7, 1-7.
    • (1997) GSA Today , vol.7 , pp. 1-7
    • Grand, S.P.1    van der Hilst, R.D.2    Widiyantoro, S.3
  • 25
    • 0029729648 scopus 로고    scopus 로고
    • Variations in the along-axis segmentation of the Afar rift system
    • Hayward, N. & Ebinger, C. 1996. Variations in the along-axis segmentation of the Afar rift system. Tectonics, 15, 244-257.
    • (1996) Tectonics , vol.15 , pp. 244-257
    • Hayward, N.1    Ebinger, C.2
  • 26
    • 0035194670 scopus 로고    scopus 로고
    • Lithospheric structure of a nascent spreading ridge inferred from gravity data: The western Gulf of Aden
    • Hebert, H., Deplus, C., Huchon, P., Khanbari, K. & Audin, L. 2001. Lithospheric structure of a nascent spreading ridge inferred from gravity data: The western Gulf of Aden. Journal of Geophysical Research, 106(B11), 26345 -26363.
    • (2001) Journal of Geophysical Research , vol.106 , Issue.B11 , pp. 26345-26363
    • Hebert, H.1    Deplus, C.2    Huchon, P.3    Khanbari, K.4    Audin, L.5
  • 27
    • 0028604818 scopus 로고
    • Cenozoic extension in northern Kenya: A quantitative model of rift basin development in the Turkana region
    • Hendrie, D.B., Kusznir, N.J., Morley, C.K. & Ebinger, C.J. 1994. Cenozoic extension in northern Kenya: a quantitative model of rift basin development in the Turkana region. Tectonophysics, 236, 409-438.
    • (1994) Tectonophysics , vol.236 , pp. 409-438
    • Hendrie, D.B.1    Kusznir, N.J.2    Morley, C.K.3    Ebinger, C.J.4
  • 28
    • 0030829191 scopus 로고    scopus 로고
    • Timing of the Ethiopian flood basalt event and implications for plume birth and global change
    • Hofmann, C., Courtillot, V., Féraud, G., Rochette, P., Yirgu, G., Ketefo, E. & Pik, R. 1997. Timing of the Ethiopian flood basalt event and implications for plume birth and global change. Nature, 389, 838-841.
    • (1997) Nature , vol.389 , pp. 838-841
    • Hofmann, C.1    Courtillot, V.2    Féraud, G.3    Rochette, P.4    Yirgu, G.5    Ketefo, E.6    Pik, R.7
  • 29
    • 0027838247 scopus 로고
    • The Malawi earthquake of March 10, 1989: Deep faulting within the East African rift system
    • Jackson, J. & Blenkinsop, T. 1993. The Malawi earthquake of March 10, 1989: Deep faulting within the East African rift system. Tectonics, 12, 1131-1139.
    • (1993) Tectonics , vol.12 , pp. 1131-1139
    • Jackson, J.1    Blenkinsop, T.2
  • 30
    • 0036929875 scopus 로고    scopus 로고
    • A chemical and multi-isotope study of the Western Cape melilite province, South Africa: Implications for the sources of kimberlites and the origin of the HIMU signature in Africa
    • Janney, P.E., Le Roex, A.P., Carlson, R.W. & Viljoen, K.S. 2002. A chemical and multi-isotope study of the Western Cape melilite province, South Africa: implications for the sources of kimberlites and the origin of the HIMU signature in Africa. Journal of Petrology, 43, 2339-2370.
    • (2002) Journal of Petrology , vol.43 , pp. 2339-2370
    • Janney, P.E.1    Le Roex, A.P.2    Carlson, R.W.3    Viljoen, K.S.4
  • 31
    • 31544448813 scopus 로고    scopus 로고
    • Variations in late syn-rift melt alignment inferred from shear-wave splitting in crustal earthquakes beneath the Ethiopian rift
    • L23308, doi: 10.1029/2005 GL024150
    • Keir, D., Kendall, J.-M., Ebinger, C. & Stuart, G. 2005. Variations in late syn-rift melt alignment inferred from shear-wave splitting in crustal earthquakes beneath the Ethiopian rift. Geophysical Research Letters, 32, L23308, doi: 10.1029/2005 GL024150.
    • (2005) Geophysical Research Letters , vol.32
    • Keir, D.1    Kendall, J.-M.2    Ebinger, C.3    Stuart, G.4
  • 32
    • 2142761095 scopus 로고    scopus 로고
    • Flood and Shield basalts from Ethiopia: Magmas from the African superswell
    • Kieffer, B., Arndt, N., et al. 2004. Flood and Shield basalts from Ethiopia: magmas from the African superswell. Journal of Petrology, 45, 793-834.
    • (2004) Journal of Petrology , vol.45 , pp. 793-834
    • Kieffer, B.1    Arndt, N.2
  • 33
    • 2942573017 scopus 로고    scopus 로고
    • Modelling sea-floor spreading initiation and depth dependent stretching at rifted continental margins
    • Fall Meeting Supplement, Abstract T12A-0440
    • Kusznir, N.J. & Tymms, V. 2003. Modelling sea-floor spreading initiation and depth dependent stretching at rifted continental margins. EOS, Transactions of the American Geophysical Union, 84(46) Fall Meeting Supplement, Abstract T12A-0440.
    • (2003) EOS, Transactions of the American Geophysical Union , vol.84 , Issue.46
    • Kusznir, N.J.1    Tymms, V.2
  • 34
    • 84879890771 scopus 로고    scopus 로고
    • The location of the Nubia-Somalia boundary along the Southwest Indian Ridge
    • Lemaux, J., Gordon, R.G. & Royer, J.-Y. 2002. The location of the Nubia-Somalia boundary along the Southwest Indian Ridge. Geology, 30, 339-342.
    • (2002) Geology , vol.30 , pp. 339-342
    • Lemaux, J.1    Gordon, R.G.2    Royer, J.-Y.3
  • 37
    • 0030432128 scopus 로고    scopus 로고
    • Helium isotopic variations in Ethiopian plume lavas: Nature of magmatic sources and limit on lower mantle contribution
    • Marty, B., Pik, R. & Yirgu, G. 1996. Helium isotopic variations in Ethiopian plume lavas: nature of magmatic sources and limit on lower mantle contribution. Earth and Planetary Science Letters, 144, 223-237.
    • (1996) Earth and Planetary Science Letters , vol.144 , pp. 223-237
    • Marty, B.1    Pik, R.2    Yirgu, G.3
  • 38
    • 84871034829 scopus 로고    scopus 로고
    • Cenozoic plume evolution and flood basalts in Yemen: A key to understanding older examples
    • Ernst, R.E. & Buchan, K.L. (eds) Special Paper Geological Society of America
    • Menzies, M., Baker, J. & Chazot, G. 2001. Cenozoic plume evolution and flood basalts in Yemen: a key to understanding older examples. In: Ernst, R.E. & Buchan, K.L. (eds) Mantle plumes: their identification through time, Special Paper Geological Society of America, 352, pp. 23-36.
    • (2001) Mantle Plumes: Their Identification Through Time , vol.352 , pp. 23-36
    • Menzies, M.1    Baker, J.2    Chazot, G.3
  • 40
    • 84879886816 scopus 로고    scopus 로고
    • Seismic evidence for a deep upper mantle thermal anomaly beneath East Africa
    • Nyblade, A., Owens, T., Gurrola, H., Ritsema, J. & Langston, C.A. 2000. Seismic evidence for a deep upper mantle thermal anomaly beneath East Africa. Geology, 28, 599-602.
    • (2000) Geology , vol.28 , pp. 599-602
    • Nyblade, A.1    Owens, T.2    Gurrola, H.3    Ritsema, J.4    Langston, C.A.5
  • 41
    • 0141954026 scopus 로고    scopus 로고
    • Stability of the Upper Nile drainage network (Ethiopia) deduced from (U-Th)/He thermochronometry: Implications for uplift and erosion of the Afar plume dome
    • Pik, R., Marty, B., Carignan, J. & Lavé, J. 2003. Stability of the Upper Nile drainage network (Ethiopia) deduced from (U-Th)/He thermochronometry: implications for uplift and erosion of the Afar plume dome. Earth and Planetary Science Letters, 215, 73-88.
    • (2003) Earth and Planetary Science Letters , vol.215 , pp. 73-88
    • Pik, R.1    Marty, B.2    Carignan, J.3    Lavé, J.4
  • 42
    • 32644437339 scopus 로고    scopus 로고
    • How many mantle plumes in Africa? The geochemical point of view
    • Pik, R., Marty, B. & Hilton, D.R. 2006. How many mantle plumes in Africa? The geochemical point of view. Chemical Geology, 226,100-114.
    • (2006) Chemical Geology , vol.226 , pp. 100-114
    • Pik, R.1    Marty, B.2    Hilton, D.R.3
  • 43
    • 0345072527 scopus 로고    scopus 로고
    • Complex shear wave velocity, structure imaged beneath Africa and Iceland
    • Ritsema, J., van Heijst, H. & Woodhouse, J. 1999. Complex shear wave velocity, structure imaged beneath Africa and Iceland. Science, 286, 1925-1928.
    • (1999) Science , vol.286 , pp. 1925-1928
    • Ritsema, J.1    van Heijst, H.2    Woodhouse, J.3
  • 44
    • 0031422230 scopus 로고    scopus 로고
    • A tomography study of the Chyulu Hills, Kenya
    • Ritter, J.R.R. & Kaspar, T. 1997. A tomography study of the Chyulu Hills, Kenya. Tectonophysics, 278(1-4), 149-169.
    • (1997) Tectonophysics , vol.278 , Issue.1-4 , pp. 149-169
    • Ritter, J.R.R.1    Kaspar, T.2
  • 45
    • 33745779153 scopus 로고    scopus 로고
    • Basaltic magmatism and the geodynamics of the East African rift system
    • Yirgu, G., Ebinger, C.J. & Maguire, P.K.H. (eds) Geological Society, London, Special Publications
    • Rogers, N. 2006. Basaltic magmatism and the geodynamics of the East African rift system. In: Yirgu, G., Ebinger, C.J. & Maguire, P.K.H. (eds) The Afar Volcanic Province within the East African Rift System. Geological Society, London, Special Publications, 259, 77-93.
    • (2006) The Afar Volcanic Province Within the East African Rift System , vol.259 , pp. 77-93
    • Rogers, N.1
  • 46
    • 0027084858 scopus 로고
    • Nd-Sr-Pb isotopic variations along the Gulf of Aden: Evidence for the Afar mantle plume-lithosphere interaction
    • Schilling, J.-G., Kingsley, R., Hanan, B. & McCully, B. 1992. Nd-Sr-Pb isotopic variations along the Gulf of Aden: Evidence for the Afar mantle plume-lithosphere interaction. Journal of Geophysical Research, 97, 10927-10966.
    • (1992) Journal of Geophysical Research , vol.97 , pp. 10927-10966
    • Schilling, J.-G.1    Kingsley, R.2    Hanan, B.3    McCully, B.4
  • 48
    • 0141959845 scopus 로고    scopus 로고
    • Early continental breakup boundary and the migration of the Afar Triple Junction, Ethiopia
    • Tesfaye, S., Harding, D.J. & Kusky, T. 2003. Early continental breakup boundary and the migration of the Afar Triple Junction, Ethiopia. Geological Society of America Bulletin, 115, 1053-1067.
    • (2003) Geological Society of America Bulletin , vol.115 , pp. 1053-1067
    • Tesfaye, S.1    Harding, D.J.2    Kusky, T.3
  • 50
    • 0033583062 scopus 로고    scopus 로고
    • Composition heterogeneity in the bottom 1000 kilometres of Earth's mantle; toward a hybrid convection model
    • van der Hilst, R.D. & Karason, H. 1999. Composition heterogeneity in the bottom 1000 kilometres of Earth's mantle; toward a hybrid convection model. Science, 283(5409), 1885-1888.
    • (1999) Science , vol.283 , Issue.5409 , pp. 1885-1888
    • van der Hilst, R.D.1    Karason, H.2
  • 52
    • 0002632619 scopus 로고    scopus 로고
    • Rift-related sedimentation and stratigraphy, southern Yemen (Gulf of Aden)
    • Purser, B. & Bosence, D. (eds) Chapman & Hall, London
    • Watchorn, F., Nichols, G. & Bosence, D. 1998. Rift-related sedimentation and stratigraphy, southern Yemen (Gulf of Aden). In: Purser, B. & Bosence, D. (eds) Sedimentary and Tectonic Evolution of Rift Basins. Chapman & Hall, London, pp. 165-189.
    • (1998) Sedimentary and Tectonic Evolution of Rift Basins , pp. 165-189
    • Watchorn, F.1    Nichols, G.2    Bosence, D.3
  • 53
    • 84875763104 scopus 로고
    • Geology, geochronology and rift basin development in the central sector of the main Ethiopian rift
    • WolderGabriel, G., Aronson, J.L. & Walter, R.C. 1990. Geology, geochronology and rift basin development in the central sector of the main Ethiopian rift. Geological Society of America Bulletin, 102, 439-485.
    • (1990) Geological Society of America Bulletin , vol.102 , pp. 439-485
    • WoldeGabriel, G.1    Aronson, J.L.2    Walter, R.C.3


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