Mass Extinctions, Volcanism, and Impacts: New Developments
CONTAINS OPEN ACCESS
This volume covers new developments and research on mass extinctions, volcanism, and impacts, ranging from the ancient Central Iapetus magmatic province linked with the Gaskiers glaciation to thermogenic degassing in large igneous provinces, the global mercury enrichment in Valanginian sediments, and the Guerrero-Morelos carbonate platform response to the Caribbean-Colombian Cretaceous large igneous province. This section is followed by a series of end-Cretaceous studies, including the implications for the Cretaceous-Paleogene boundary event in shallow platform environments and correlation to the deep sea; the role of wildfires linked to Deccan volcanism on ecosystems from the Indian subcontinent; rock magnetic and mineralogical study of Deccan red boles; and factors leading to the collapse of producers during Deccan Traps eruptions and the Chicxulub impact.
The Central Iapetus magmatic province: An updated review and link with the ca. 580 Ma Gaskiers glaciation
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Published:March 06, 2020
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CiteCitation
Nasrrddine Youbi, Richard E. Ernst, Ulf Söderlund, Moulay Ahmed Boumehdi, Abdelhak Ait Lahna, Colombo Celso Gaeta Tassinari, Warda El Moume, Mohamed Khalil Bensalah, 2020. "The Central Iapetus magmatic province: An updated review and link with the ca. 580 Ma Gaskiers glaciation", Mass Extinctions, Volcanism, and Impacts: New Developments, Thierry Adatte, David P.G. Bond, Gerta Keller
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ABSTRACT
Large igneous provinces and associated silicic magmatism can have a significant global climatic effect, so we explored the relationship between the large igneous province record and the ca. 580 Ma Gaskiers glaciation. The late Ediacaran glaciation exists on at least 14 different paleocontinental blocks, and assuming synchroneity, this Gaskiers glaciation was likely of short duration, with estimates ranging from 1.6 m.y. to 340 k.y. The Central Iapetus magmatic province event found in Laurentia, Baltica, and West Africa consists of multiple pulses in the range 620–520 Ma, with the ca. 580 Ma pulse particularly well developed in North Africa. Based on the age matches of 580–570 Ma Central Iapetus magmatic province pulses and the Gaskiers glaciation, and taking into consideration that there is no robust evidence for a major meteorite impact at the time of the Gaskiers onset, we propose that: (1) the initial silicic ca. 580 Ma pulse of the Ouarzazate event (Anti-Atlas of Morocco) helped to trigger the Gaskiers glaciation, and (2) global warming associated with the subsequent ca. 579–570 Ma continental flood basalts, marking the second stage of the Ouarzazate event, helped to end the ice age.
- absolute age
- Africa
- albedo
- algorithms
- ancient ice ages
- Anti-Atlas
- Atlas Mountains
- Avalonia
- Baltica
- basalts
- carbon
- carbon dioxide
- clastic rocks
- Cryogenian
- dates
- diamictite
- Ediacaran
- flood basalts
- fossils
- glacial geology
- glaciation
- Iapetus
- ICP mass spectra
- igneous rocks
- ion probe data
- Laurentia
- magmatism
- mass spectra
- microfossils
- Moroccan Atlas Mountains
- Morocco
- Neoproterozoic
- nesosilicates
- North Africa
- North America
- organic carbon
- orogeny
- orthosilicates
- paleoclimatology
- paleogeography
- plate collision
- plate tectonics
- Precambrian
- productivity
- Proterozoic
- rifting
- Rodinia
- sedimentary rocks
- SHRIMP data
- silicates
- siliceous composition
- snowball Earth
- spectra
- Sturtian
- supercontinents
- thermal ionization mass spectra
- U/Pb
- upper Precambrian
- volcanic rocks
- volcanism
- West Africa
- West African Craton
- zircon
- zircon group
- Gaskiers Glaciation
- Ouarzazate Group
- Franklin large igneous province