Fashewar Ignimbrite na Campanian

Fashewar Ignimbrite na Campanian
volcanic eruption (en)
Bayanai
Ƙasantuwa a yanayin ƙasa	Filin Phlegraean
Kwanan wata	40,000 years BCE
Wuri
40°49′37″N 14°08′20″E

Fashewar Campanian Ignimbrite (CI, kuma CI eruption) wani babban dutse ne mai aman wuta a tekun Bahar Rum a lokacin ƙarshen Quaternary, wanda aka rarraba shi. 7 akan Fihirisar fashewar Volcanic (VEI). An dangana taron ga dutsen mai aman wuta na Archiflegreo, 12 by 15 kilometres (7.5 mi × 9.3 mi) caldera na filayen Phlegraean, wanda yake 20 kilometres (12 mi) yammacin Dutsen Vesuvius a ƙarƙashin yammacin yammacin birnin Naples da Gulf of Pozzuoli, Italiya. Shi ne mafi girman fashewar fashewar tashin wuta a Turai a cikin shekaru 200,000 da suka gabata, kuma mafi girma fashewar Campi Fleigrei caldera .

Kimanin kwanan wata da girman fashewar (s), da kuma adadin kayan da aka fitar sun bambanta sosai a cikin ƙarni da yawa an yi nazarin shafin. Wannan ya shafi manyan abubuwan da suka faru na dutsen wuta waɗanda suka samo asali ne a cikin filin Campanian, saboda yana ɗaya daga cikin tsarin dutsen wuta mafi rikitarwa a duniya. Koyaya, ci gaba da bincike, ci gaba na hanyoyin, da tarawa na bayanan volcanological, geochronological, da geochemical sun inganta daidaito na kwanakin.

Sakamakon kwanan nan ta hanyar radiocarbon da argon-argon dating sune, bi da bi, 39,220 zuwa 39,705 kalanda shekara BP da 39850±140 shekara BP. Ƙididdigar ƙarar fashewa a cikin madaidaicin dutsen-rock (DRE) yana cikin kewayon 181–265 cubic kilometres (43–64 cu mi) , kuma tephra ya watse a kan yanki kusan 3,000,000 square kilometres (1,200,000 sq mi) , wanda aka fi sani da ash horizon Y-5. Daidaiton waɗannan lambobi yana da mahimmanci ga masana ilimin kimiyyar ruwa, masu binciken yanayi, masu binciken burbushin halittu, masu nazarin halittu-anthropologists da masu bincike na fannoni masu alaƙa kamar yadda taron ya zo daidai da al'amuran duniya da na gida, irin su rikice-rikice masu yawa a cikin gyare-gyaren gyare-gyaren halittu na archaeological, yanayin yanayi.

Magana

Kalmar Campanian tana nufin bakan dutsen wuta na Campanian wanda ke cikin yankin Campania a kudancin Italiya wanda ya shimfiɗa a kan Yankin subduction wanda ya haifar da haɗuwa da faranti na Afirka da Eurasia. Bai kamata a rikita shi da ƙarshen Cretaceous na Campanian ba.

Kalmar ignimbrite ta samo asali ne daga masanin ilimin ƙasa na New Zealand Patrick Marshall daga Latin ignis (wuta) da imber (shower)) da -ite. Yana nufin ajiyar da ke samuwa sakamakon fashewar pyroclastic.

Tarihi

Filin Phlegraean (Italiyanci: Campi Flegrei "Caldera filin ƙonewa wani tsari ne da aka gina shi da diamita na kusan kilomita 12 zuwa 15 (7.5 mi × 9.3 mi). Ya ƙunshi tsohuwar Campanian Ignimbrite caldera, ƙaramin Neapolitan Yellow Tuff caldera kuma mafi tarwatsewa daga ƙasƙanci na baya-bayan nan. Filayen suna zaune a kan Pliocene - Quaternary Extensional domain tare da kurakurai, wanda ke gudana daga Arewa maso Gabas zuwa Kudu-maso-Yamma da Arewa maso Yamma zuwa Kudu-maso-Gabas daga gefen bel na Apennine.