Large Igneous Provinces最新文献

The Osmium Isotope Signature of Phanerozoic Large Igneous Provinces 显生宙大火成岩省的锇同位素特征

Large Igneous Provinces Pub Date : 2021-01-08 DOI: 10.1002/9781119507444.CH10

A. Dickson, A. Cohen, M. Davies

引用次数: 4

Platinum Group Element Traces of CAMP Volcanism Associated With Low‐Latitude Environmental and Biological Disruptions 与低纬度环境和生物破坏相关的CAMP火山活动的铂族元素痕迹

Large Igneous Provinces Pub Date : 2021-01-08 DOI: 10.1002/9781119507444.CH12

J. Whiteside, Paul E. Olsen, S. Kinney, M. Et-Touhami

引用次数: 0

Sedimentary Mercury Enrichments as a Tracer of Large Igneous Province Volcanism 沉积汞富集作为大火成岩省火山活动的示踪剂

Large Igneous Provinces Pub Date : 2021-01-08 DOI: 10.1002/9781119507444.CH11

L. Percival, B. Bergquist, T. Mather, H. Sanei

{"title":"Sedimentary Mercury Enrichments as a Tracer of Large Igneous Province Volcanism","authors":"L. Percival, B. Bergquist, T. Mather, H. Sanei","doi":"10.1002/9781119507444.CH11","DOIUrl":"https://doi.org/10.1002/9781119507444.CH11","url":null,"abstract":"Volcanic activity associated with the emplacement of Large Igneous Provinces (LIPs) has been linked to most Phanerozoic extinctions/episodes of major environmental change. In recent years, mercury (Hg) enrichments and elevated mercury/total organic carbon (Hg/TOC) ratios have been increasingly utilized as a marker of volcanism in sedimentary records deposited distally from LIPs. The proxy is based on the premise that volcanism is a major natural source of the element to the atmosphere, and that it was especially important prior to anthropogenic emissions. To date, end-Permian and end-Triassic records illustrate the strongest use of Hg as a marker of volcanic activity, supplemented by the use of Hg isotopes and other evidence for LIP eruptions and volatile emissions. Sedimentary records of several other events also document Hg enrichments in at least one region, suggestive of a regional- or global-scale perturbation to the Hg cycle at those times, potentially linked to volcanism. The Cenomanian– Turonian Oceanic Anoxic Event 2 appears to be the exception, with strata documenting peaks in Hg/TOC in a small minority of studied records, suggesting that there was only a minimal perturbation to the Hg cycle at that time. Even for events where a global Hg-cycle perturbation apparently occurred, varying Hg enrichments documented from individual archives of the same event indicate that the complex biogeochemical cycling of mercury can result in a strong influence of local/regional aquatic, biological, or sedimentary processes on the precise signature of any worldwide disturbance. Of additional intrigue is an apparent lack of correlation of Hg and Hg/TOC with other volcanic proxies such as osmium isotopes, suggesting that the two systems record different aspects of LIP volcanism and emplacement. Recent studies are beginning to investigate these above complexities, but further work is needed to fully explore the nuances of Hg in the geological record, and how it can be best employed as a proxy for LIP volcanism.","PeriodicalId":307052,"journal":{"name":"Large Igneous Provinces","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115214547","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 23

Preliminary Appraisal of a Correlation Between Glaciations and Large Igneous Provinces Over the Past 720 Million Years 过去7.2亿年冰期与大火成岩省相关性的初步评价

Large Igneous Provinces Pub Date : 2021-01-08 DOI: 10.1002/9781119507444.CH8

N. Youbi, R. Ernst, R. Mitchell, Moulay Ahmed Boumehdi, Warda El Moume, A. A. Lahna, M. K. Bensalah, U. Söderlund, M. Doblas, C. Tassinari

{"title":"Preliminary Appraisal of a Correlation Between Glaciations and Large Igneous Provinces Over the Past 720 Million Years","authors":"N. Youbi, R. Ernst, R. Mitchell, Moulay Ahmed Boumehdi, Warda El Moume, A. A. Lahna, M. K. Bensalah, U. Söderlund, M. Doblas, C. Tassinari","doi":"10.1002/9781119507444.CH8","DOIUrl":"https://doi.org/10.1002/9781119507444.CH8","url":null,"abstract":"Earth has gone through periods of cooling including global, near global, or regional glaciations, which are observed in the Archean, Paleoproterozoic, Neoproterozoic, Ordovician, Permo‐Carboniferous, and Cenozoic times. We review the mechanisms by which large igneous provinces (LIPs) and silicic LIPs (SLIPs) can cause global cooling. Then we investi gate the correlation of LIPs with important glaciation events, focusing on those of Neoproterozoic and Phanerozoic age. The 720 Ma Franklin‐Irkutsk LIP, a large part of which was emplaced into an evaporite basin and all of which was emplaced in the tropics, is linked with the start of the Sturtian glaciation, one of the longest and most severe glaciations in Earth history. The ca. 579 Ma pulse of the Central Iapetus Magmatic Province (CIMP) is associated with the start and end of the Gaskiers glaciation. The Hirnantian glaciation (ca. 440 Ma) may be associated with poorly dated ca. 450 Ma intraplate magmatism in several regions, including eastern Siberia, South Korea, Argentina, Iran, and elsewhere. It is also coincident with a huge volume of silicic volcanic provinces generated by supereruptions. Permo‐Carboniferous glacia tions (P1–P4, 300–260 Ma) can be correlated with widespread intraplate magmatism of the European northwest African magmatic province (and its initiation as the 300 Ma Skagerrak LIP), and also the 259 Ma Emeishan LIP of China. A recently recognized ca. 34 Ma initial pulse of the Afro‐Arabian LIP matches the Eocene‐Oligocene cooling (Oi‐1 glacia tion). More precise dating of both the LIPs and cooling events is required to confirm the correlations and to assess the role of LIPs relative to other causes proposed for global and regional glaciations.","PeriodicalId":307052,"journal":{"name":"Large Igneous Provinces","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133343960","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Environmental Impact of Silicic Magmatism in Large Igneous Province Events 大火成岩省事件中硅质岩浆活动的环境影响

Large Igneous Provinces Pub Date : 2021-01-08 DOI: 10.1002/9781119507444.CH6

S. Bryan

{"title":"Environmental Impact of Silicic Magmatism in Large Igneous Province Events","authors":"S. Bryan","doi":"10.1002/9781119507444.CH6","DOIUrl":"https://doi.org/10.1002/9781119507444.CH6","url":null,"abstract":"Silicic magmatism is a feature of all continental LIP events, and where volumetrically significant, occurs as high‐frequency (~1,000–10,000 yr recurrence intervals), large‐magnitude (>M8) explosive supereruptions producing vast ignimbrite sheets. Silicic supereruptions inherently have the eruptive mechanism to deliver aerosols and ash to the stratosphere for global dispersal, and thus overcome eruptive barriers that exist for flood basalts built up by long‐lived, low effusion and low vigor fountains that lack height and persistent stratospheric penetration. The historical record demonstrates the climate forcing capabilities of silicic supereruptions, which during LIP events, were likely associated with large CO2, SO2, halogen, and Hg emissions, and through tephra deposition, could cause iron fertilization in the world's oceans, thereby kick‐starting phytoplanktonic biological pumps to significantly draw down atmospheric CO2. What may be important, therefore, for LIP events to cause the most environmental impact and trigger a mass extinction, is the combined effect of closely spaced basaltic and silicic, or effusive and explosive, eruptions that work in tandem to overload the troposphere and stratosphere with volcanic aerosols producing rapid decadal‐scale, extreme fluctuations in pH driven by acid rain, S‐, or iron fertilization‐driven temperature chills, and toxic UV radiation bursts. These effects could be repeated within as little as a few hundred years of each other particularly during hyperactive LIP pulses.","PeriodicalId":307052,"journal":{"name":"Large Igneous Provinces","volume":"45 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133263872","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

INDEX 指数

Large Igneous Provinces Pub Date : 2021-01-08 DOI: 10.1002/9781119507444.index

引用次数: 0

Radiometric Constraints on the Timing, Tempo, and Effects of Large Igneous Province Emplacement 大火成岩省就位的时间、速度和影响的辐射限制

Large Igneous Provinces Pub Date : 2021-01-08 DOI: 10.1002/9781119507444.CH2

J. Kasbohm, B. Schoene, S. Burgess

引用次数: 29

Large Igneous Provinces (LIPs) and Anoxia Events in “The Boring Billion” “无聊的十亿人”中的大火成岩省(lip)和缺氧事件

Large Igneous Provinces Pub Date : 2021-01-08 DOI: 10.1002/9781119507444.CH20

S. Zhang, Richard E. Ernst, Junling Pei, Yue Zhao, Guohui Hu

引用次数: 2