Special Publications最新文献_第9页

Hardground, gap and thin black shale: spatial heterogeneity of arrested carbonate sedimentation during the Jenkyns Event (T-OAE) in a Tethyan pelagic Basin (Gerecse Mts, Hungary) 硬地、缝隙和薄黑色页岩:特提斯中上层盆地詹金斯事件(T-OAE)期间碳酸盐沉积的空间非均质性

Special Publications Pub Date : 2021-03-31 DOI: 10.1144/SP514-2020-266

T. Müller, G. Price, E. Mattioli, M. Leskó, F. Kristály, J. Pálfy

{"title":"Hardground, gap and thin black shale: spatial heterogeneity of arrested carbonate sedimentation during the Jenkyns Event (T-OAE) in a Tethyan pelagic Basin (Gerecse Mts, Hungary)","authors":"T. Müller, G. Price, E. Mattioli, M. Leskó, F. Kristály, J. Pálfy","doi":"10.1144/SP514-2020-266","DOIUrl":"https://doi.org/10.1144/SP514-2020-266","url":null,"abstract":"Abstract The Jenkyns Event or Toarcian Oceanic Anoxic Event was an episode of severe environmental perturbations reflected in carbon isotope and other geochemical anomalies. Although well studied in the epicontinental basins in NW Europe, its effects are less understood in open marine environments. Here we present new geochemical (carbon isotope, CaCO3, [Mn]) and nannofossil biostratigraphic data from the Tölgyhát and Kisgerecse sections in the Gerecse Hills (Hungary). These sections record pelagic carbonate sedimentation near the margin of the Tethys Ocean. A negative carbon isotope excursion of c. 6‰ is observed in the Tölgyhát section, in a condensed clay and black shale layer where the CaCO3 content drops in association with the Jenkyns Event. At Kisgerecse, bio- and chemostratigraphic data suggest a gap in the lower Toarcian. The presence of an uppermost Pliensbachian hardground, the absence of the lowermost Toarcian Tenuicostatum ammonite zone and the condensed record of the Jenkyns Event at Tölgyhát, together with a condensed Tenuicostatum Zone and the missing negative carbon isotope anomaly at Kisgerecse, imply arrested carbonate sedimentation. A calcification crisis and sea-level rise together led to a decrease in carbonate production and terrigenous input, suggesting that volcanogenic CO2-driven global warming may have been their common cause.","PeriodicalId":22055,"journal":{"name":"Special Publications","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84590324","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: 6

Introduction: subsurface sand remobilization and injection 简介:地下砂石回收和注入

Special Publications Pub Date : 2021-03-31 DOI: 10.1144/SP493-2020-268

A. Hurst, A. Grippa, S. Silcock, M. Huuse, M. Bowman, S. Cobain

引用次数: 3

Cenozoic volcanism along Dahongliutan fault in the West Kunlun Mountains, China: implication from distribution of volcanic rocks, volcanic geology, and geochemistry 西昆仑大红六滩断裂新生代火山活动:火山岩分布、火山地质和地球化学的启示

Special Publications Pub Date : 2021-03-30 DOI: 10.1144/SP510-2020-132

Bo Zhao, Feixiang Wei, Wen-jian Yang, Jiandong Xu, X. Cui

{"title":"Cenozoic volcanism along Dahongliutan fault in the West Kunlun Mountains, China: implication from distribution of volcanic rocks, volcanic geology, and geochemistry","authors":"Bo Zhao, Feixiang Wei, Wen-jian Yang, Jiandong Xu, X. Cui","doi":"10.1144/SP510-2020-132","DOIUrl":"https://doi.org/10.1144/SP510-2020-132","url":null,"abstract":"Abstract In the West Kunlun Mountains, four volcanic fields (Kangxiwa, Dahongliutan, Qitaidaban and Quanshuigou) are distributed along the Dahongliutan fault, which is c. 180 km long. Based on field investigations, chronological measurements and geochemical analysis of some volcanic fields, the results of geological, geochemical and geophysical research in previous studies in the corresponding study areas are summarized. The volcanic activities in these areas were mainly effusive eruptions, explosive eruptions and phreatomagmatic eruptions. In this study, we discovered the Qitaiyanhu volcanic field for the first time and determined that the 14C age of the lacustrine strata underlying the Qitaiyanhu lava flows is 13.110 ± 0.04 ka BP, indicating that there may still have been volcanic activities in the late Pleistocene and even the Holocene in the Dahongliutan fault area. Base surge deposits, which are the products of the interaction between magma and water, were found in the Kangxiwa volcanic field. The four shoshonitic rock fields of Kangxiwa, Dahongliutan, Qitaidaban and Quanshuigou are likely to be products of different evolution stages from the same magma source area. The magmatic origin of these volcanic fields may be related to the upwelling of the asthenosphere, triggered by the collision between the Indian and Tarim plates.","PeriodicalId":22055,"journal":{"name":"Special Publications","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87374788","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: 1

Stable isotope studies of the water cycle and terrestrial environments: introduction 水循环和陆地环境的稳定同位素研究:导论

Special Publications Pub Date : 2021-03-22 DOI: 10.1144/SP507-2021-32

A. Bojar, A. Pelc, C. Lécuyer

引用次数: 0

Palaeomycology: a modern mycological view of fungal palynomorphs 古菌学:真菌形态的现代真菌学观点

Special Publications Pub Date : 2021-03-22 DOI: 10.1144/SP511-2020-47

N. N. Nuñez Otaño, M. V. Bianchinotti, M. Saparrat

{"title":"Palaeomycology: a modern mycological view of fungal palynomorphs","authors":"N. N. Nuñez Otaño, M. V. Bianchinotti, M. Saparrat","doi":"10.1144/SP511-2020-47","DOIUrl":"https://doi.org/10.1144/SP511-2020-47","url":null,"abstract":"Abstract Fungal spores are increasingly used as reliable proxies in palaeoenvironmental reconstructions; however, little attention is paid to the ecological tolerances of the fungi themselves and the signal the fungi provide. This chapter provides a much-needed background in fungal biology and ecology of monophyletic Dikarya (Ascomycota and Basidiomycota), as well as taphonomic considerations which could be included in any use as palaeoecological indicators. It is intended to help those who are interested in using fungal spores as palaeoecological indicators to make more informed interpretations. A recapitulation of spore dispersal strategies and distances is presented for a better understanding of the transport mechanisms of fungal spores. Likewise, pigmentation is discussed, as it results in significant taphonomic bias in fossil fungal assemblages and, as some dark-coloured pigmentation is authigenic while some develops during taphonomy. A key element of this chapter is discussion of the environmental role of fungi, including modern v. palaeo-approaches to fungal ecology, fungal assemblages, and diversity patterns as diagnostic tools to infer palaeoenvironments.","PeriodicalId":22055,"journal":{"name":"Special Publications","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82527276","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: 8

The effects of the Jenkyns Event on the radiation of Early Jurassic dinoflagellate cysts 詹金斯事件对早侏罗世鞭毛藻囊辐射的影响

Special Publications Pub Date : 2021-03-19 DOI: 10.1144/SP514-2020-255

V. Correia, J. Riding, L. V. Duarte, P. Fernandes, Z. Pereira

引用次数: 7

Carboniferous ammonoid genozones 石炭系氨类基因区

Special Publications Pub Date : 2021-03-18 DOI: 10.1144/SP512-2020-229

S. Nikolaeva

引用次数: 2

Olivine chemistry of the Quaternary Datong basalts of the Trans-North China Orogen: insights into mantle source lithology and redox–hydration state 跨华北造山带第四系大同玄武岩的橄榄石化学:地幔源岩性和氧化还原水化状态的认识

Special Publications Pub Date : 2021-03-15 DOI: 10.1144/SP510-2020-142

L. Hong, Yinhui Zhang, Le Zhang, Yigang Xu, Zhe Liu, Pengli He

{"title":"Olivine chemistry of the Quaternary Datong basalts of the Trans-North China Orogen: insights into mantle source lithology and redox–hydration state","authors":"L. Hong, Yinhui Zhang, Le Zhang, Yigang Xu, Zhe Liu, Pengli He","doi":"10.1144/SP510-2020-142","DOIUrl":"https://doi.org/10.1144/SP510-2020-142","url":null,"abstract":"Abstract Cenozoic intraplate basalts are widespread above the Big Mantle Wedge (BMW) and its front in East Asia. While the mantle source lithology and redox-hydration state have been demonstrated to be crucial in the generation of basalts above the BMW, their nature and role in the basalts above the front of the BMW is poorly constrained. To address this, we report olivine compositions of the Quaternary Datong basalts. Datong basalts exhibit ocean island basalt-like trace-element compositions and depleted Sr–Nd isotopes with slightly enriched signatures (enriched mantle I, EMI) for tholeiitic basalts. Olivines of the Datong basalts show high Ni and Fe/Mn, and low Ca, Mn and Mn/Zn values, pointing to a pyroxenite source. Applying V and Ca partition coefficients between olivine and whole rock, respectively, the Datong basalts lie −0.44 to 0.64 log units above the fayalite–magnetite–quartz buffer for fO2, and contain 2.1–3.4 wt% H2O but highly variable H2O/Ce values (265–1498). Both fO2 and H2O/Ce in the basalts vary with whole-rock and olivine compositions, indicating that the source was the main control. Thus, there is a heterogeneous redox–hydration state in the source, the EMI component being relatively reduced but extremely wet and recycled oceanic crust being relatively oxidized but dry. The extremely wet EMI component was probably derived from the mantle transition zone. In the light of our findings, we propose a model in which mantle upwelling carried the recycled oceanic crust and EMI component from the mantle transitional zone to shallow mantle, owing to the Pacific slab stagnating in the mantle transitional zone, to form pyroxenite, which subsequently melted to generate Datong basalts.","PeriodicalId":22055,"journal":{"name":"Special Publications","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74782023","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: 1

Coprophilous fungal spores: non-pollen palynomorphs for the study of past megaherbivores 嗜粪真菌孢子:用于研究过去的大型食草动物的非花粉孢子形态

Special Publications Pub Date : 2021-03-05 DOI: 10.1144/SP511-2020-41

Eline N. van Asperen, Angelina G. Perrotti, Ambroise G. Baker

{"title":"Coprophilous fungal spores: non-pollen palynomorphs for the study of past megaherbivores","authors":"Eline N. van Asperen, Angelina G. Perrotti, Ambroise G. Baker","doi":"10.1144/SP511-2020-41","DOIUrl":"https://doi.org/10.1144/SP511-2020-41","url":null,"abstract":"Abstract Spores from coprophilous fungi are some of the most widely used non-pollen palynomorphs. Over the last decades, these spores have become increasingly important as a proxy to study the Pleistocene and Holocene megafauna. Although the number of types used in palaeoecology is relatively small, there is a wide range of coprophilous fungal taxa whose utility in palaeoenvironmental reconstruction remains under-researched. However, environmental and taphonomic factors influencing preservation and recovery of these spores are still poorly understood. Furthermore, our understanding of whether and how spores are transported across the landscape is limited. Dung fungal spore presence appears to correlate well with megaherbivore presence. However, depending on the site, some limitations can remain to quantitative reconstructions of megaherbivore abundance from dung fungal spore records. The presence of dung fungal spores is often more significant than their absence and variation in abundance with time should be interpreted with caution. Correlation with other proxies may provide a promising way forward. The majority of studies using dung fungal spores as an indicator for large herbivore abundance are of records of Late Pleistocene and Holocene age, with a focus on Late Quaternary megafaunal extinction. However, more research could potentially extend records further back in time.","PeriodicalId":22055,"journal":{"name":"Special Publications","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73921938","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: 12

Stenopterygiids from the lower Toarcian of Beaujolais and a chemostratigraphic context for ichthyosaur preservation during the Toarcian Oceanic Anoxic Event 博若莱下托瓦西亚的窄鳍鱼类和托瓦西亚海洋缺氧事件期间鱼龙保存的化学地层背景

Special Publications Pub Date : 2021-03-01 DOI: 10.1144/SP514-2020-232

J. Martin, G. Suan, B. Suchéras-Marx, Louis Rulleau, J. Schlögl, Kévin Janneau, Matt Williams, A. Léna, Anne-Sabine Grosjean, E. Sarroca, V. Perrier, V. Fernandez, Anne‐Lise Charruault, E. Maxwell, P. Vincent

{"title":"Stenopterygiids from the lower Toarcian of Beaujolais and a chemostratigraphic context for ichthyosaur preservation during the Toarcian Oceanic Anoxic Event","authors":"J. Martin, G. Suan, B. Suchéras-Marx, Louis Rulleau, J. Schlögl, Kévin Janneau, Matt Williams, A. Léna, Anne-Sabine Grosjean, E. Sarroca, V. Perrier, V. Fernandez, Anne‐Lise Charruault, E. Maxwell, P. Vincent","doi":"10.1144/SP514-2020-232","DOIUrl":"https://doi.org/10.1144/SP514-2020-232","url":null,"abstract":"Abstract We report new ichthyosaur material excavated in lower Toarcian levels of the LafargeHolcim Val d'Azergues quarry in Beaujolais, SE France. A partially articulated skull and a smaller, unprepared but likely subcomplete skeleton preserved in a carbonate concretion are identified as stenopterygiids, a family of wide European distribution during the Early Jurassic. These specimens are among the finest preserved Toarcian exemplars known from Europe and, in one of them, soft tissue preservation is suspected. Their state of preservation is attributed to the combination of prolonged anoxic conditions near the water–sediment interface and early carbonate cementation resulting from the activity of sulfate-reducing bacteria. We also present carbon and strontium isotope values obtained from the study site that allow detailed temporal comparisons with other Toarcian vertebrate-yielding sites and environmental perturbations associated with the Toarcian Oceanic Anoxic Event (T-OAE). These comparisons suggest that the relatively high abundance and good preservation state of Toarcian vertebrates was favoured by a prolonged period of low bottom water oxygenation and accumulation rates. The environmental conditions that prevailed during the T-OAE were probably responsible for the extensive nature of Lagerstätte-type deposits with exceptional preservation of marine organisms. Testing whether the T-OAE had a biological impact on marine vertebrates requires a precise chemostratigraphic context of the fossil record spanning the Pliensbachian–Toarcian interval.","PeriodicalId":22055,"journal":{"name":"Special Publications","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76340810","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