36 Siberian Trapsevent
Location: Russia (Siberian craton)
Plume head center: 72.5 N, 96 E
Size: 340,000 sq. km. (extrusive only) 1,500,000 sq. km. (flows, sills and dikes), >2,000,000 cu. km.
Age: mainly 0.251-0.249 Ga
Rating: A (1v, 3)
VOLCANIC ROCKS: Siberian Traps (can be broadly divided into four regions of different volcanic sequences): Maimecha-Kotui, Noril'sk, Putorana & Nizhnyaya Tunguska; Polar Ural-Pay Khoy & West Siberian basin .
DIKES: ESE-SE fanning swarm comprising: Ebekhaya, ESE trending; Maymecha, SE trending ; Kochikha (Avamsky), ~E-NE trending arcuate swarm .
SILL-LIKE LAYERED INTRUSIONS: Noril'sk intrusions, (Uzb 251.2± 0.3) .
COMMENT: picrites present.
Size: 250,000 sq. km.
Age: 0.258 Ga
Rating: A (1v)
VOLCANIC ROCKS: Emeishan, (Uz 251.2± 3.4 Ma ); (258 Ma ).
COMMENT: The 251 Ma age determined from volcanic ash bed; The 258 Ma age is based on stratigraphic constraints.
38 Cache Creekevent(s)
Location: W. Canada (Cache Creek terrane, Canadian Cordillera)
Size: ~1500 km long, 50 -100 km wide
Age: Middle Permian & Late Triassic
Rating: B (4v)
VOLCANIC ROCKS: Cache Creek.
COMMENT: Middle Permian and Late Triassic basalts representing different levels of an oceanic plateau subsequently accreted to North America during the Late Jurassic.
39 Himalaya Neotethysevent
Location: N. India, Pakistan, Nepal, Tibet
Size: ~200,000 sq. km.
Age: Early Permian (Artinskian-Kungurian)
Rating: B (4v)
VOLCANIC ROCKS: Panjal Traps, Nar-Tsum, Abor, Bhote-Kosi, & ? Woniusi.
COMMENT: "Roughly contemporaneous emplacement of continental flood basalts of similar geochemical signature along a 2000 km rift axis" (p. 533 in).
40 Tarim blockevent
Location: NW. China (Tarim block)
Age: 0.28 Ga
Rating: C (9d)
DIKES: Tarim block, NW trending, K 282 Ma.
Location: Norway, Sweden, United Kingdom
Plume head center: 57.5 N, 8.5 E
Size: 150,000 sq. km.
Age: 0.300 Ga
Rating: A (3)
DIKES: Jutland radiating swarmcomprising: Oslo, NNW-NNE trending ; Whin-Midland Valley, ENE trending ; Scania, ESE trending .
SILLS: Whin & Midland Valley, (p. 98 in ) (U ca. 300 Ma, M. Hamilton, 2000, personal communication).
COMMENT: Perhaps part of Permo-Carboniferous European?northwest African (EUNWA) superplume event. Triple rift junction associated with radiating swarm .
42 EUNWA (European-northwest Africa)event(s)
Location: Europe, northwest Africa
Size: 4,500,000 sq. km.
Age: Permo-Carboniferous, mainly Stephanian-Autunian
Rating: C (probably 10)
MAGMATISM: in the Alps, Bohemian Massif, Bamble/Oslo region, Cantabria, central North Sea, Corsica-Sardinia, Horn Graben, Massif Central, North Sea-Dutch-German-Polish province, northern United Kingdom, Pyrenees, Scotland, Saar-Nahe Trough, Saale Trough, the lberian Ranges and Spanish Central System; & Morocco.
COMMENT: Proposed as a superplume event. However, "small volume of the volcanism and its scattered distribution both in time and space is not typical of a 'Large Igneous Province'" (p. 95 ).
Size: 5000 sq. km.
Age: 0.4-.0.3 Ga
Rating: C (8)
LAYERED INTRUSIONS: Panzhihua complex, R 373 Ma; Hongge complex, R 343 Ma; Baima complex, R 306 Ma; & Taihe complex.
COMMENT: rift event.
Location: E. Russia
Plume head center: 66 N, 132 E
Size: 800,000 sq. km.
Age: 0.35 Ga
Rating: A (3)
VOLCANIC ROCKS: Dzhalkan lavas.
DIKES: Yakutsk NW-S fanning swarmcomprising: Chara-Sinsk, NE trending; Vilyui-Marcha, NE trending; Dzhardzhan, SE trending; Tomporuk, N trending.
45 East European Cratonevent(s)
Location: W. Russia, Ukraine, eastern Europe
Size: 3,000,000 sq km.
Age: 0.365 Ga
Rating: A (1v)
VOLCANIC ROCKS: Dnieper-Donets, Timan , Kolva , Kola Peninsula , Voronezh , Novaya Zemlya (p. 49 in ).
DIKES:: Dnieper-Donets, variable trending; Moskva, E trending =600 Ma ; Saratov, E-ENE trending (=600 Ma) ; Voronezh, N-NNW trending (=600 Ma) ; L'vov, SE trending (=600 Ma) ; Kirov, NNE trending (=600 Ma) ; Timan, SE-SSE trending (680-350 Ma) .
COMMENT: A cluster of mantle plumes causing synchronous volcanism, rifting, and uplift on the East European Platform in the Devonian. Peak of volcanism is Famennian, ca. 365 Ma . Kola Peninsula alkaline igneous province is probably part of same event .
Location: Kyrgyzstan (Southern Tian-Shan Mountains)
Rating: C (9vsd)
VOLCANIC ROCKS: Kyrgyzatin.
COMMENT: Age of flows constrained by paleontological dating of host sedimentary rocks.
47 Belaya Riverevent
Location: SE. Siberia (Sette-Daban area)
Age: 0.56-0.43 Ga
Rating: C (9s)
SILLS: Belaya River, K 560-430 Ma.
COMMENT: May be difficult to distinguish from Sette Daban sills in same area; see event 82.