Proterozoic blueschist-bearing mélange in the Anti-Atlas mountains, Morocco

Precambrian Research

Volumn 118, Issue 3-4, 2002, Pages 179-194

  Hefferan, Kevin P ^a   Admou, Hassan ^b   Hilal, Rabia ^c   Karson, Jeffrey A ^d   Saquaque, Ali ^e   Juteau, Thierry ^h   Bohn, M Marcel ^h   Samson, Scott D ^f   Kornprobst, Jacques M ^g  

^a UNIVERSITY OF WISCONSIN STEVENS POINT   (United States)

^b CADI AYYAD UNIVERSITY   (Morocco)

^c FACULTÉ DES SCIENCES   (Morocco)

^d DUKE UNIVERSITY   (United States)

^e Reminex   (Morocco)

^f SYRACUSE UNIVERSITY   (United States)

^g UNIVERSITÉ BLAISE PASCAL   (France)

^h Universite de Bretagne Occidentale   (France)

Author keywords

Anti Atlas Mountains; Blueschist; Neoproterozoic; Ophiolites; Pan African orogeny

Indexed keywords

MINERAL;

BLUESCHIST; MELANGE; METAMORPHISM; OPHIOLITE; PAN AFRICAN OROGENY; PROTEROZOIC; SUBDUCTION;

ARTICLE; GEOLOGY; HYPERBARISM; LOW TEMPERATURE; MOROCCO; PETROLOGY; PRECAMBRIAN;

ANTI-ATLAS; ATLAS MOUNTAINS; MOROCCO;

EID: 0037175771     PISSN: 03019268     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0301-9268(02)00109-2     Document Type: Article

References (73)

1. Admou, H., 1989. Etude Structurale de la Chaine Pan-Africaine Dans la Suture Ophiolitique de Bou Azzer-El Graara (Anti-Atlas Central, Maroc)-Géometrie et Cinématique-Données Pétrographiques et Géochimiques, Marrakech, Morocco, 3rd cycle doctoral thesis, Université Cadi Ayyad, p. 172.
2. Admou, H., 2000. Structuration de la Paléosuture Ophiolitique Panafricaine de Bou Azzer-Siroua (Anti-Atlas Central, Maroc). Doctorate d'Etates-Sciences, Université Cadi Ayyad, Marrakech, Maroc, p. 201.
3. Admou, H., Juteau, T., 1998. Découverte d'un Système Hydrothermal Fossile Dans le Complexe Ophiolitique de Siroua (Anti-Atlas, Marocco). Compte Rendu Académie Science de Paris 327, 335-340.
4. Admou, H., Samson, S., Essaifi, A., Wafika, A., 2002. A new datation at 760 Ma of the plagiogranites associated to the Neo-proteozoic Bou Azzer and Siroua ophiolite (Anti-Atlas, Morocco). Nineteenth Colloquium of African Geology, El Jadida Morocco, p. 4.
5. Affaton, P., Trompette, R., Sougy, J., 1991. The Dahomeyide orogen: Tectonothermal evolution and relationships with the Volta Basin. In: Dallmeyer, R.D., Lécorché, J.P. (Eds.), The West African Orogens and Circum-Atlantic Correlatives. Springer, Berlin, pp. 107-123.
6. Avé Lallemant, H.G., Guth, L.R., 1990. Role of extensional tectonics in exhumation of eclogites and blueschists in an oblique subduction setting, Northeastern Venezuela. Geology 18, 950-953.
7. Azizi Samir, M.R., Ferrandini, J., Tane, J.L., 1990. Tectonique et volcanisme tardi-Pan Africain (580-560 Ma) dans l'Anti-Atlas Central (Maroc): Interprétation géodynamique a l'échelle du NW de l'Afrique. Journal of African Earth Science 10, 549-563.
8. Benyoucef, A., 1990. Etude Pétrostructurale de la Partie Occidentale de la Boutonnière Précambienne de Bou Azzer-El Graara (Anti-Atlas Marocain). Third cycle doctoral thesis, Marrakech, Morocco, Université Cadi Ayyad, p. 155.
9. Bodinier, J.L., Dupuy, C., Dostal, J., 1984. Geochemistry of Precambrian ophiolites from Bou Azzer, Morocco. Contributions of Mineralogy and Petrology 78, 43-50.
10. Boher, M., Abouchami, W., Michard, A., Albarede, F., Arndt, N.T., 1992. Crustal growth in West Africa at 2.1 Ga. Journal of Geophysical Research 97, 345-369.
11. Bouougri, E.H., Saquaque, A., 2000. Organisation Stratigraphique et Structure de la Marge Anti-Atlasique du Craton Ouest-Africain au sud du Siroua (Néoprotérozoique, AntiAtlas Central, Maroc). Compte Rendu Académie Science de Paris 330, 753-759.
12. Brown, E.H., 1977. The crossite content of Ca-amphibole as a guide to pressure of metamorphism. Journal of Petrology 18, 52-73.
13. Burke, K., Dewey, J.F., Kidd, W.S.F., 1977. World distribution of sutures - The sites of former oceans. Tectonophysics 40, 69-99.
14. Caby, R., 1994. Precambrian coesite from northern Mali: First record and implications for plate tectonics in the trans-Saharan segment of the Pan African belt. European Journal of Mineralogy 6, 235-244.
15. Caby, R., Bertrand, J.M.L., Black, R., 1981. Pan-African oceanic closure and continental collision in the Hoggar-Iforas segment, central Sahara. In: Kröner, A. (Ed.), Precambrian Plate Tectonics. Elsevier, Amsterdam, pp. 407-434.
16. Chabane, A., 1991. Les Roches Vertes du Protérozoique Supérieur de Khzama (Siroua, Anti-Atlas Central, Marocco), un Exemple Précambrien d'Ophiolite d'Avant-arc Formée en Context Transformant. Marrakech, Morocco, Thèse d'état, Université Cadi Ayyad, p. 570.
17. Charlot, R., 1978. Caractérisation des événements éburneens et pan-africains dans l'Anti-Atlas marocain. Apport de la Methode Géochronologique Rb-Sr. Ph.D. dissertation, Rennes, France, Université de Rennes, p. 220.
18. Choubert, G., 1947. L'accident majeur de l'Anti-Atlas. Compte Rendu Académie Science de Paris 234, 1172-1173.
19. Church, W.R., 1980. Late Proterozoic ophiolites. In: Aubouin, J., Allegre, C.J. (Eds.), Basic-Ultrabasic Associations in Orogenic Belts, vol. 272. Centre Nationale des Sciences, Paris, pp. 105-118.
20. Cisse, A., 1989. Géometrie et Cinématique de la Déformation Panafricaine Majeure dans le District Minier de Bleida (Bou Azzer-El Graara, Anti-Atlas Central-Marocco). Marrakech, Morocco, 3rd cycle doctoral thesis, Université Cadi Ayyad, p. 211.
21. DeRoever, W., 1956. Some differences between post-Paleozoic and older regional metamorphism. Geologie en Mijnbouw 18, 123-127.
22. Dewey, J.F., Bird, J.M., 1970. Mountain belts and the new global tectonics. Journal of Geophysical Research 75, 2625-2647.
23. 3+ concentrations in ferromagnesian silicates and oxides from microprobe analyses, using stoichiometric criteria. Mineralogical Magazine 51, 431-435.
24. Ducrot, J., 1979. Datation à 615 Ma de la granodiorite de Bleida et conséquences sur la chronologie des phases tectoniques, métamorphiques et magmatiques panafricaines dans l'Anti-Atlas marocain. Bulletin Societé Géologique France 7, 495-499.
25. Ducrot, J., Lancelot, J.R., 1977. Probléme de la limite Précambrien-Cambrien: Etude radiochronologique par la methode U/Pb sur zircons du volcan du Jbel Boho. Canadian Journal of Earth Science 14, 2771-2777.
26. 39Ar dating. Journal of Metamorphic Petrology 19, 233-248.
27. Ennih, N., Liégeois, J.P., 2001. The Moroccan Anti-Atlas: The West African craton passive margin with limited PanAfrican activity. Implications for the northern limit of the craton. Precambrian Research 112, 289-302.
28. Ernst, W.G., 1988. Tectonic history of subduction zones inferred from retrograde blueschist P-T paths. Geology 16, 1081-1084.
29. Evans, B., 1990. Phase relations of epidote-blueschists. Lithos 25, 3-23.
30. Fryer, P., Wheat, C.G., Mottl, M.J., 1999. Mariana blueschist mud volcanism: Implications for conditions within the subduction zone. Geology 27, 103-106.
31. Gass, I.G., 1981. Pan-African (Upper Proterozoic) plate tectonics of the Arabian-Nubian shield. In: Kröner, A. (Ed.), Precambrian Plate Tectonics. Elsevier, Amsterdam, pp. 387-405.
32. Hefferan, K., 1992. Oblique Collision and Syn-Orogenic Basin Development in a Pan-African Suture Zone, Anti-Atlas Mountains, Morocco. Ph.D. dissertation, Duke University, Durham, NC, USA, p. 163.
33. Hefferan, K., Karson, J.A., Saquaque, A., 1992. Proterozoic Collisional Basins in a Pan African Suture Zone, Anti-Atlas Mountains, Morocco. Precambrian Research 54, 295-319.
34. Hefferan, K., Admou, H., Karson, J., Saquaque, A., 2000. Anti-Atlas (Morocco) role in Neoproterozoic Western Gondwana reconstruction. Precambrian Research 103, 89-96.
35. Helper, M.A., 1986. Deformation and High P/T Metamorphism in the Central Part of the Condrey Mountain Window, North-Central Klamath Mountains, California and Oregon. Geological Society of America Memoir 164, 125-141.
36. Hilal, R., 1991. L'ophiolite de Bou Azzer (Anti-Atlas, Marocco) Structure, Pétrographie, Géochimie et Contexte de Mise en Place. Thèse de 3éme cycle. Univer̀sité Cadi Ayyad, Marrakech, Maroc, p. 181.
37. Jahn, B., Caby, R., Monie, P., 2001. The oldest UHP eclogites of the world: Age of UHP metamorphism, nature of protoliths and tectonic implications. Chemical Geology 178, 143-158.
38. Juery, A., 1976. Datation U/Pb du Socle Précambrien du Haut-Atlas (Maroc), Ph.D. dissertation, Université de Paris, VII, Paris, France, p. 85.
39. Kapp, P., Yin, A., Manning, C.E., Murphy, M., Harrison, T.M., Spurlin, M., Lin, D., Xi-Guang, D., Cun-Ming, W., 2000. Blueschist-bearing metamorphic core complexes in the Qiangtang block reveal deep crustal structure of northern Tibet. Geology 28, 19-22.
40. Karson, J.A., 2001. Oceanic crust when Earth was young. Science 292, 1076-1077.
41. Kröner, A., 1983. Proterozoic mobile belts compatible with plate-tectonic concept. In: Medaris, L.G. Jr., Byers, C.W., Mickelson, D.M., Shankes, W.C. (Eds.), Proterozoic Geology. Geological Society America Memoir 161, 59-74.
42. Leake, B.E., 1978. Nomenclature of amphiboles. American Mineralogist 63, 1023-1052.
43. Leblanc, M., 1975. Ophiolites Precambriennes et Gris Arsenies de Cobalt (Bou Azzer, Marocco). Ph.D. dissertation, Paris, France, Université de Paris VI, p. 329.
44. Leblanc, M., 1981. The late proterozoic ophiolites of Bou Azzer (Morocco): Evidence for Pan-African plate tectonics. In: Kröner, A. (Ed.), Precambrian Plate Tectonics. Elsevier, Amsterdam, pp. 435-451.
45. Leblanc, M., Lancelot, J.R., 1980. Interprétation géodynamique du domaine pan-africain (Précambrien terminal) de l'Anti-Atlas (Maroc) à partir de données géologiques et géochronologiques. Canadian Journal of Earth Science 17, 142-155.
46. Leblanc, M., Moussine-Pouchkine, A., 1994. Sedimentary and volcanic evolution of a Neoproterozoic continental margin (Bleida, Anti-Atlas, Morocco). Precambrian Research 70, 25-44.
47. Lister, G.S., Banga, B., Feenstra, A., 1984. Metamorphic core complexes of Cordilleran type in the Cyclades, Aegean Sea, Greece. Geology 12, 221-225.
48. Liou, J.G., Maruyama, S., 1987. Parageneses and compositions of amphiboles from Franciscan jadeite-glaucophane type facies series metabasites at Cazadero, California. Journal of Metamorphic Geology 5, 371-395.
49. Liou, J.G., Maruyama, S., Wang, X., Graham, S., 1990. Precambrian blueschist terranes of the world. Tectonophysics 181, 97-111.
50. Maruyama, S., Liou, J.G., Terabayashi, M., 1998. Blueschists and eclogites of the world and their exhumation. International Geology Review 38, 485-594.
51. Maruyama, S., Liou, J.G., 1998. Initiation of ultrahigh-pressure metamorphism and its significance on the proterozoic-phanerozoic boundary. The Island Arc 7, 6-35.
52. Maruyama, S., Cho, M., Liou, J.G., 1986. Experimental investigations of blueschist-greenschist transition equilibria: Pressure dependence of A1203 contents in sodic amphiboles - A new geobarometer. Geological Society of America Memoir 164, 1-16.
53. Milovanovic, D., Marchig, V., Stevan, K., 1995. Petrology of the crossite schist from Fruska Gora Mountains (Yugoslavia), relic of a subducted slab of the Tethyan oceanic crust. Journal of Geodynamics 20, 289-304.
54. Miyashiro, A., 1973. Metamorphism and Metamorphic Belts. Wiley, New York, p. 492.
55. Möller, A., Appel, P., Mezger, K., Schenk, V., 1995. Evidence for a 2 Ga subduction zone: Eclogites in the Usagaran belt of Tanzania. Geology 23, 1067-1070.
56. Moore, T.E., 1986. Petrology and tectonic implications of the blueschist-bearing Puerto Nuevo mélange complex, Vizcaino Peninsula, Baja California Sur, Mexico. Geological Society of America Memoir 164, 43-58.
57. Mrini, 1993. Chronologie (Rb-Sr, U-Pb); Traéage Isotopique (Sr-Nb-Pb) des Sources de Roches Magmatiques Éburnéenes, Panafricaines et Hercyniennes du Maroc. Thèse d'Etat. Université Cadi Ayyad, Morocco, p. 276.
58. Naidoo, D.D., Bloomer, S.H., Saquaque, A., Hefferan, K.P., 1991. Geochemistry and significance of metavolcanic rocks from the Bou Azzer-El Graara ophiolite (Morocco). Precambrian Research 53, 79-97.
59. Platt, J.P., 1986. Dynamics of orogenic wedges and the uplift of high-pressure metamorphic rocks. Geological Society America Bulletin 97, 1037-1053.
60. Raymond, L.A., 1974. Possible modern analogs for rocks of the Franciscan Complex. Geology 2, 143-146.
61. Saquaque, A., 1992. Un Exemple de Suture-Arc: Le Precambien de l'Anti-Atlas Centre Oriental (Maroc). Ph.D. dissertation, Marrakech, Morocco, Université Cadi Ayyad, p. 366.
62. Saquaque, A., Admou, H., Cisse, A., Benyousef, A., Reuber, I., 1989a. Les Intrusions Calco-Alcalines de la Boutonnière de Bou Azzer-El Graara (Anti-Atlas, Maroc): Marqueurs de la Déformation Panafricaine Majeure dans un Contexte de Collision d'Arc. Compte Rendu Académie Science de Paris 308, 1279-1283.
63. Saquaque, A., Admou, H., Karson, J.A., Hefferan, K., Reuber, I., 1989b. Precambrian accretionary tectonics in the Bou Azzer-El Graara region, Anti-Atlas, Morocco. Geology 17, 1107-1110.
64. Saquaque, A., Benharref, M., Abia, H., Mrini, Z., Reuber, I., Karson, J., 1992. Evidence for a Pan African Volcanic Arc and Wrench Fault Tectonics in the Jbel Saghro, Anti-Atlas, Morocco. Geologische Rundschau 81, 1-13.
65. Sengör, A.M.C., 1984. The Cimmeride orogenic system and Tectonics of Eurasia. Geological Society America Special Paper 195, 82.
66. Shermer, E.R., 1990. Mechanisms of blueschist creation and preservation in an A-type subduction zone, Mount Olympos region, Greece. Geology 18, 1130-1133.
67. Sinha-Roy, S., Mohanty, M., 1988. Blueschist facies metamorphism in the ophiolitic mélange of the Late Proterozoic Delhi Fold Belt, Rajasthan, India. Precambrian Research 42, 97-105.
68. Tekiout, B., Saquaque, A., Reuber, I., Karson, J.A., 1991. Synvolcanic tectonics and related sedimentation in the forearc/arc environment of the Bou Azzer (Anti-Atlas, Morocco). European Union Geophysical Annual Meeting Terra Abstracts 3, 59.
69. Thomas, R.J., Chevallier, L.C., Gresse, P.G., Harmer, R.E., Eglington, B.M., Armstrong, R.A., de Beer, C.H., Martini, J.E., de Kock, G.S., Macey, P., Ingram, B., 2002. Precambrian evolution of the Sirwa Window, Anti-Atlas Orogen, Morocco. Precambrian Research 118, 1-57.
70. Trouw, R.A.J., Simoes, L.S.A., Valladares, C.S., 1998. Metamorphic evolution of a subduction complex, South Shetland Islands, Antarctica. Journal of Metamorphic Geology 16, 475-490.
71. Walsh, G.E., Aleinikoff, J.N., Benziane, F., Yazidi, A., Armstrong, T.R., 2002. U-pb zircon geochronology of the Paleoproterozoic Tagragra de Tatainlier and its Neoproterozoic cover, Western Anti-Atlas, Morocco. Precambrian Research 117, 1-20.
72. White, C.E., Barr, S.M., Jamieson, R.A., Reynolds, P.H., 2001. Neoproterozoic high-pressure/low-temperature metamorphic rocks in the Avalon terrane, southern New Brunswick, Canada. Journal of Metamorphic Geology 19, 519-530.
73. Zwart, H.J., 1967. The duality of orogenic belts. Geologie en Mijnbouw 46, 283-309.