Widespread wildfires linked to early Albian Ocean Anoxic Event 1b: Evidence from the Fuxin lacustrine basin, NE China

Xu, Xiaotao; Shao, Longyi; Eriksson, Kenneth A.; Zhou, Jiamin; Wang, Dongdong; Hou, Haihai; Hilton, Jason; Wang, Shuai; Lu, Jing; Jones, Timothy Peter

doi:10.1016/j.gloplacha.2022.103858

Cited by 19 publications

(7 citation statements)

References 121 publications

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“…Taken together, these lines of evidence point to overall arid conditions during the deposition of the lower Plattenkalk interval which were rapidly, though gradually, replaced by a moderately humid and warm climate during the upper Plattenkalk interval. The variable amount of millimetre‐sized charcoal within some marly interlayers of the middle and upper intervals suggests that wildfires were an active process in the coastal depositional setting of Pietraroja, likely promoted by high atmospheric oxygen concentration (Glasspool & Scott, 2010; Brown et al ., 2012; Mays et al ., 2017; Bartiromo et al ., 2019; Xu et al ., 2022).…”

Section: Discussionmentioning

confidence: 99%

New insights into the palaeoenvironmental–palaeoclimatic significance and sedimentary dynamics of carbonate Lagerstätten: The lower Albian of Pietraroja (Southern Italy)

Graziano,

Raspini,

Bartiromo

2023

Sedimentology

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This study reports the first high‐resolution, integrated facies analysis of the lowermost Albian Pietraroja Lagerstätten (Apennine Carbonate Platform) which yields the first dinosaur (Scipionyx samniticus) found in Italy and other terrestrial vertebrates and plants. Aiming to clarify the long‐debated palaeoenvironmental significance of the Pietraroja succession, the following have been carried out: (i) a field survey to establish stratigraphic position and number of the fossil Lagerstätten; (ii) the centimetre‐scale facies analysis of a new section, ca 15 m‐thick, consisting of two new lithostratigraphic units, the ‘Cyclically organized Limestones’ and the ‘Cherty Limestones’; (iii) the scanning electron microscopy – energy dispersive X‐ray spectroscopy and backscattered electron – energy dispersive X‐ray spectroscopy analyses of clay mineral proxies for palaeoclimate and non‐carbonate grains; and (iv) the regional and supra‐regional investigation of the event stratigraphical context of the fossil Lagerstätten, in order to elucidate the controls on their formation. The section includes two out of the three observed fossil‐rich Lagerstätten, each up to 1.5 m‐thick. The arrangement of lithofacies and early diagenetic overprint defines shallow‐water depositional cycles suggestive of precession and short‐eccentricity periodicities. The Middle Lagerstätte yielding Scipionyx samniticus consists of three intervals. The lower, paralic interval was deposited during arid conditions and passes gradually to the plant‐rich, coastal wetland carbonaceous marls of the upper interval. The ‘Cherty Limestones’, yielding the Upper Lagerstätte with terrestrial vertebrates, contains two spiculitic intervals suggesting the development of siliceous sponge meadows in a shallow, restricted lagoon. Genetic stratigraphy suggests that the Pietraroja Lagerstätten were formed during glacioeustatic lowstands; interestingly, the Middle Lagerstätte mirrors the earliest Albian sea‐level lowstand (KAl1 event, ca 111.2 Myr), during a semi‐continuous supply of windblown volcaniclastics. Findings herein substantiate the pivotal role of paralic‐continental Lagerstätten for deriving high‐frequency palaeoclimatic dynamics and glacioeustacy from carbonate platform archives. The origin of Tethyan continental bridges between Africa and Europe during the late Aptian–earliest Albian cold interval is discussed.

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Section: Discussionmentioning

confidence: 99%

New insights into the palaeoenvironmental–palaeoclimatic significance and sedimentary dynamics of carbonate Lagerstätten: The lower Albian of Pietraroja (Southern Italy)

Graziano,

Raspini,

Bartiromo

2023

Sedimentology

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“…In this study, the Cretaceous coals were formed from the angiosperm flora of the Shengli coalfield of Inner Mongolia. 36 The extrapolations from the Pennsylvanian and Permian coals to our Cretaceous coals have been made with caution.…”

Section: Telovitrinite Semifusinite Fusinite Funginite Collodetrinite...mentioning

confidence: 99%

“…The maceral-based coal facies indices have been frequently used to estimate the depositional environments of coal-bearing strata in different regions. − Their utilization has also been a subject of debate. , The Pennsylvanian and Permian coals studied by Calder and Diessel were formed from the Laurasian Westphalian flora of Nova Scotia and from the Permian Gondwana flora of New South Wales, respectively. In this study, the Cretaceous coals were formed from the angiosperm flora of the Shengli coalfield of Inner Mongolia . The extrapolations from the Pennsylvanian and Permian coals to our Cretaceous coals have been made with caution.…”

Section: Introductionmentioning

confidence: 99%

Assessing the Depositional Environment of Cretaceous Ge-Rich Coals in the Wulantuga Mine, Shengli Coalfield, Northeastern China

Wang,

Chen,

Tang

et al. 2024

Energy Fuels

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To provide a new perspective on the formation of the Ge-rich coals, the depositional environment of the Wulantuga coals was studied with the incorporation of coal maceral and geochemistry-based indicators. The results show that the No.6 coal seam in the Wulantuga mine was formed in a mire with a succession of swamps, fens, and marsh. The average contents of Ge in coals formed in different mires, from high to low, are swamp (220 μg/g), marsh (205 μg/g), and fen (185 μg/g). The accumulation of the No.6 seam has been divided into four stages from bottom to top based on the identified coal facies types. The reducing condition and gelification of the ecosystem environment ranged from strong to weak, to strong, and back to weak. The variation of Ge concentrations also occurs in the same way. Strong reduction and gelification of the ecosystem environments can favor Ge enrichments in the Wulantuga coals. Sufficient sources and favorable conditions are essential for the unusual Ge enrichments in coals. This study provides a new perspective for the depositional environment of Ge-rich coals and is useful for the exploration of Ge-rich coal resources.

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“…68 Inertinite is mostly formed in peat swamps with shallow water cover, periodic exposure, and wildfire events. 69,70 Liptinite is a group of macerals derived from nonhumifiable plant matter and relatively hydrogen-rich remains such as sporopollenin, resins, waxes, and fats, which are closely related to the oxygenrich peat swamp environment where the lignocellular tissue of the plant remains can be oxidized and decomposed, and the stable components are relatively enriched. 71 Peat swamps in tidal flats are mostly water-covered low-lying swamps with strong reducibility, and the coal formed in this environment has high vitrinite contents and beneficial reservoir physical properties.…”

Section: Distribution Of the Cbm Contentmentioning

confidence: 99%

“…It is generally believed that vitrinite is mainly formed in a reducing environment, which is mostly related to peat swamps with higher water levels . Inertinite is mostly formed in peat swamps with shallow water cover, periodic exposure, and wildfire events. , Liptinite is a group of macerals derived from nonhumifiable plant matter and relatively hydrogen-rich remains such as sporopollenin, resins, waxes, and fats, which are closely related to the oxygen-rich peat swamp environment where the lignocellular tissue of the plant remains can be oxidized and decomposed, and the stable components are relatively enriched…”

Section: Cbm Accumulationmentioning

confidence: 99%

Coalbed Methane Enrichment Characteristics and Exploration Target Selection in the Zhuozishan Coalfield of the Western Ordos Basin, China

et al. 2022

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The Zhuozishan coalfield at the western margin of the Ordos Basin is one of the main coal-mining areas in China, and recent explorations have revealed the great potential for coalbed methane (CBM) resources in its Carboniferous and Permian strata. In this paper, the controlling factors of CBM enrichment of the major coals are studied in this coalfield and the CBM resources are estimated based on the analysis of the coal petrology and compilation of literature data on the gas content. The result of the coal petrology analysis of 10 samples shows that the vitrinite content of No. 16 coal (71.9–77.3%) is higher than that of No. 9 coal (59.1–65.1%), and the inertinite content of No. 16 coal (18.9–23.5%) is lower than that of No. 9 coal (30.1–34.9%). The R o,max value of No. 16 coal (1.18–1.35%) is higher than that of No. 9 coal (1.04–1.13%), and both coals are of medium rank. Due to greater thickness, deeper burial depth, and better coal petrology characteristics, the No. 16 coal seam of the Taiyuan Formation is selected as the major coal seam for CBM resource estimation, which has a thickness of 1–6 m and a present-day burial depth of 200–1100 m. The gas content of this coal seam varies mostly between 4 and 10 m3/t. Positive correlation between the coal seam thickness as well as present-day burial depth and the gas content suggests that the thick and deeply buried coal seams are favorable for CBM preservation. The ash yield shows an insignificant negative correlation with the gas content, indicating that ash yield is not an important factor for CBM enrichment. The syncline hinges located below the thrust zones show higher gas content due to greater burial depths. In contrast, the anticline hinges at shallower depths tend to have lower gas contents. Based on the combined information about sedimentary environments, structural patterns, and hydrogeology, two CBM accumulation models are put forward in the study area that include synclinehydraulic plugging below thrust nappe and faultconfined aquifer plugging. The volumetric method is used to estimate the CBM resources, and results indicate that the CBM resource in the whole coalfield is 428.78 × 108 m3, and the total resource abundance is 0.74 × 108 m3/km2. Two favorable areas for the CBM exploration are optimized based on the resource amount and resource abundance. One of the favorable areas is the Kabuqi area in the northern part of the coalfield, and another is the Baiyunwusu area in the central part of the coalfield. These two areas will be the CBM priority exploration areas at the western margin of the Ordos Basin.

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Widespread wildfires linked to early Albian Ocean Anoxic Event 1b: Evidence from the Fuxin lacustrine basin, NE China

Cited by 19 publications

References 121 publications

New insights into the palaeoenvironmental–palaeoclimatic significance and sedimentary dynamics of carbonate Lagerstätten: The lower Albian of Pietraroja (Southern Italy)

New insights into the palaeoenvironmental–palaeoclimatic significance and sedimentary dynamics of carbonate Lagerstätten: The lower Albian of Pietraroja (Southern Italy)

Assessing the Depositional Environment of Cretaceous Ge-Rich Coals in the Wulantuga Mine, Shengli Coalfield, Northeastern China

Coalbed Methane Enrichment Characteristics and Exploration Target Selection in the Zhuozishan Coalfield of the Western Ordos Basin, China

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