Index Page numbers in italic denote figures. Page numbers in bold denote tables. Abenaki Formation carbonate bank 327, 355 Arac¸uaı´ orogen 11, 13, 36 depositional environments and diagenesis Araxa´ intrusion 53, 55 356–359 Argentina subplate 80 modelling study 360–364 rotation 81, 82 porosity 369–370 Argentine-South Africa conjugate margin system 77, 78, stratigraphy 358 81, 171, 175–180, 521 Abenaki sub-basin 268, 269 Argo Formation 268 Abimael Ridge 61, 101, 159, 198, 514, 515, 516 Arraial do Cabo dyke swarms 43–44 Abrolhos Archipelago 55, 56 Artimon argillaceous limestone (Abenaki 7) 327, Abrolhos Bank 55, 56, 59 356–357, 358 Abrolhos Volcanic Complex 55, 60 Asal Lake 519 abyssal mantle exposure, St Peter and St Paul Islets 66–69 Ascension Fracture Zone 236, 540, 541 Adamawa Uplift 62 Ascension Island 63–64 Ade´lie Rift Block 463, 465, 469 plume 45, 71, 231 Aden propagator 503, 507, 511, 517, 518, 524 asymmetry 170, 178–180, 405, 407, 416–417 Afar mantle plume 502, 508, 511, 525 see also Southern Rift System; symmetry Afar region 519 Atlantic Ocean divergent margins 3, 498–501 analogue for Santos-Namibe break-up 517 rift evolution 504 volcanism 523, 525 sea-floor spreading 501 Afar Swell 119 syn-rift phase 499 Afar triple junction 502, 507, 517, 518, 519 transgression/regression 499–500 Africa see African-Antarctic margin; SW African margin; transitional sequence 499 West Africa see also North Atlantic margins; South Atlantic African Plate 80 Atlantis Bank, slow spreading 373 break-up from Arabian Plate 501–504 ‘Atlas Gulf’ 340 deformation 81 Atlas Mountain Fold Belt 270 African-Antarctic margin, magmatism 23–24, 32 Austral Africa subplate 80 Agadir Basin 270, 342 deformation 81,82–84 alkaline feldspar crystallization 49, 50, 51 Austral Segment see South Atlantic, South Segment Almada Basin 215–232, 216 Australian-Antarctic Basin 466, 468 basement 221–222 Avalon Terrane 268 comparison with South Gabon Basin 229–230 Avedis Chain 93, 94, 515 continent-ocean boundary 222–225 fault system 225, 230 Baccaro limestone (Abenaki 2-6) 327, 356–357, 358 geological evolution 225–227 hydrocarbon exploration 359–360, gravity modelling 221, 224 369–370 half-graben sub-basins 222, 224, 225 seismic modelling 360–366 magnetic anomalies 223, 227 Bahia Seamounts 224–225 Moho and crustal depth 218–221, 229 Bahia State basins 215, 223 non-volcanic margin 225–227, 230–231 Balleny Fracture Zone 454, 455 oceanic basement 224 Baltimore Canyon Trough 326–327 proto-oceanic volcanism 227, 230 hydrocarbon exploration 329, 331 rifting 225, 230 Baltimore Rise 93-1 well 333 seismic imaging 216, 225, 226, 227, 229 Banhada˜o complex 22 stratigraphy 216–218, 229 Banquereau Formation 326, 327 Alula-Fartak Fracture Zone 511, 512, 516, 518 Baobab Field 235, 244 Amazon River 118 Barra do Itapirapua˜ complex 22 Amazonia Craton 13 Barra Fracture Zone 227–228 Angola see Espı´rito Santo-Angola conjugate margin system Barreirinhas Basin 538, 539, 553 Angola Craton 11, 12,13 basalt Angola-Congo margin alkaline exhumed lower continental crust, transitional lithosphere Rio Grande Rise 130 436–443 SE Brazil margin 22, 42 plate reconstruction 439, 441, 442 Walvis Ridge 132 seismic imaging 438, 439, 440, 442–443 high-Ti tholeiitic, Rio Grande Rise-Walvis Ridge 130, sub-salt sag basin 437–440, 442–443, 444 133, 134, 142–143 Animba Formation 217, 229 low-Ti tholeiitic, PMP 43, 134 Antarctica see African-Antarctic margin; Dronning Maud Land Newark Rift Basin 303, 304 apatite fission track analysis, West Africa-NE Brazil ocean island 42 margin 110, 111, 121, 122 see also flood basalt; Floriano´polis Dyke Swarm; Appalachian Orogen 268, 290 mid-ocean ridge basalt Aptian salt see salt, Aptian Basin and Range province, low-angle detachment faults 405 Aptian-Albian palaeostress 388, 389–390 bathymetry Arabian Plate 518 Santos Basin 149 break-up from African Plate 501–504, 518 Scotian Margin 293–294 break-up from Somalian Plate 503, 518, 522 Vito´ria-Trinidade seamount chain 59 558 INDEX bauxite, West Africa-NE Brazil margin 115, 120, 121 carbonatites Beachport Terrace Angola 31, 33 margin symmetry 467 Jacupiranga 48 Otway Basin 460, 461, 462 Paranaı´ba Arch 53 Belmont Island 66 Carolina Trough 327 Benguela Basin, pre-salt structure 194, foldout p. 196 Salt Basin conceptual play 329, 330 Benue Block 80 Catala˜o intrusion 53, 55 boundary rotation 77, 79 Cauvery Basin 478, 480 Besnard Bank 55, 59, 60 Cauvery Rift Zone 379, 391, 481, 482, 492 biomarkers, hydrocarbons 255–264 Ceara´ Basin 64, 538, 553 Blake Spur Magnetic Anomaly 302 Ceduna Terrace 468 Bonnet P-23 well 356, 360 Ceiba Field 235, 244 Boonton Formation 303, 304, 306 Cenomanian-Coniacian, sedimentation, West Africa-NE Brazil Bosaso Graben 516 margins 121–122, 123 Botucatu Formation 27 Cenozoic-Cretaceous & Jurassic Carolina Trough Salt Basin Brandberg Massif 29, 31, 32 conceptual play 329, 330 Brasilia Fold Belt 14, 35,36 Cenozoic-Cretaceous & Jurassic Palaeoslope Siliciclastic Brazil see NE Brazil; North Brazilian-Ivory Coast-Ghana-Benin play 329, 333 Shear Zone; SE Brazilian margin; West Central African Shear Zone 61–62, 79,82 Africa-NE Brazil margins Central Atlantic Magmatic Province (CAMP) 267, 304, Bremer Basin 454, 455 324–325, 498 brittle crust Moroccan margin volcanics 347–349 in exhumed mantle lithosphere 447–448 Newark Rift Basin 316 see also embrittlement Central Atlantic margin, United States see US central broad-terrane basins 303, 315 Atlantic margin Newark Rift Basin 316 Central Segment see South Atlantic, Central Segment Broken Ridge 454, 455 Central Tectonic Boundary 11, 15 Bruce Rise 454, 455 Central Walvis Ridge (CWR) 132, 141 Bureau of Ocean Energy Management (BOEM) Chaillu Massif 228 assessment 328–333 Chain Fracture Zone 236, 390, 540, 541 Bu´zios Unit 45 Challenger Island 66 Charcot Fracture Zone 236 Cabo de Santo Agostinho granite 45–47, 70 Charcot seamounts see Jean Charcot seamounts Cabo Frio dyke swarms 44 Chedabucto Fault 268, 269 strike-slip component 44 Clarens Formation 15 Cabo Frio High 61, 93, 94, 523 climate, and sedimentation, West Africa-NE Brazil Cabo Frio Island igneous intrusion 47, 48, 49, 50, 58 margins 115, 116, 117–126 magma evolution 49, 51 Cobequid Fault 268, 269 pyroclastic rock 51, 53 Cohasset Field 356, 366 Cabo Frio Terrane 15, 44 Colorado subplate, rotation 81 Cabo Frio Volcanic Province 54 Colorado-Hope transfer system 178 Camamu Basin 215, 216 Colorado-Orange conjugate margin system 171, 175–176, 177 non-volcanic margin 230 crustal structure 171, 175–176 Cameroon Volcanic Line 47, 61–63, 64 gravity modelling 175–176 Campos Basin 132, 133 Columbia Seamount 56 comparison with Scotian Basin 498, 500 composite basins 303 petroleum systems 498 compression pre-salt structure 194–196 Sudan rifts 81, 84, 86 outer volcanic high 195 Transbrasiliano lineament 83,84 sag interval 194 Congo Basin, sedimentation rate 113, 114, 115 syn-rift interval 194–195 Congo Craton 11, 12, 13, 96, 230 unconformity, base level and break-up 195–196 Conrad discontinuity, Red Sea 512, 513 sedimentation rate estimate 113, 114, 115 conservational models sub-salt sag basin 498–499, 500, 523 Central Segment reconstruction 77, 78,79–86 subsidence model 201, 209 v. non-conservational models 75–77 syn-rift extension 196, 208 continent-ocean boundary 95, 96 Campos-Kwanza margin Almada Basin 222–225 comparison with Newfoundland-Iberia margin 506 definition 454 comparison with Red Sea-Gulf of Aden margin 511 Nova Scotia-Morocco conjugate margin 271 extension 198 Santos Basin 187 Cananeia igneous intrusion 47–48 Southern Rift System 460, 461, 463, 464, 468, 471 geochronology 50 Wilkes Land 466 Cap Juby continent-ocean transition heavy oil discovery 337 definition 454 salt tectonics 341 Gulf of Aden 520, 523–524 Cape Fold Belt 13, 15 hyperextended margins, mantle exhumation 418–420 Caprico´rnio Lineament 93, 94, 103 SE Brazilian margin, seismic data 152–157, 159 carbonates South Atlantic 168, 169, 523 Kwanza Basin 28 South Segment 176–177 Morocco 340 break-up 177–180 Tethys evolution 499, 501 Southern Rift System 455, 456, 457, 463, 464, 468 US central Atlantic margin 269, 327, 355–370 West Iberia Margin 418–425, 423 INDEX 559 continental break-up mechanisms 373–397 Dixcove Ridge 241, 243 continental crust dolomitization, Abenaki Formation 358–359 East Indian margin 486, 491 Dom Feliciano orogen 13, 15 lower, exhumed, Angola-Congo margin 436–443 Doukkala Basin 338, 341, 342 seaward limit, Nova Scotia-Morocco conjugate Drakensberg basalts 15 margins 273–274 Dronning Maud Land, western, dykes 23–24 upper, ‘rails’ 388, 389–390 Dwyka Group 15 see also crustal thinning dyke swarms continental extension models 405, 407 African-Antarctic margin 12, 23–24, 31–33 Coromondal fault zone 379, 390, 481, 482 Saudi Arabia 510 Costeiro Unit 45 SE Brazil 12, 13, 14, 16–21, 31–33, 35, 149 Cree Member 327 early Cretaceous 42–43, 45, 46,70 Cretaceous, sedimentation, West Africa-NE Brazil margins Mid-Cretaceous 45 121–122, 123 Southern Africa 12, 24–25, 28, 32–33 Cretaceous & Jurassic Blake Plateau Basin play strike-slip component 36, 44 329, 331 Cretaceous & Jurassic Hydrothermal Dolomite play 329, 331–333 Early Cretaceous basins, palaeostress 388, 389–390 Cretaceous & Jurassic Interior Shelf Structure play 329, 331 earthquakes, SE Brazil 515, 516 Cretaceous & Jurassic Marginal Fault Belt East African Rift System 507 conceptual play 329–330, 330 East Coast Magnetic Anomaly (ECMA) 267, 269, 271, Cretaceous Normal Superchron 374, 375 272–274, 290, 302, 324–325 crust see continental crust; lower crust; oceanic crust East Indian margin