Environmental history of the German Lower Rhine Embayment during the Middle Miocene as reflected by carbon isotopes in brown coal

Lücke, Andreas; Helle, Gerhard; Schleser, Gerhard H.; Figueiral, Isabel; Mosbrugger, Volker; Jones, Timothy Peter; Rowe, Nick

doi:10.1016/s0031-0182(99)00122-4

Cited by 100 publications

(49 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It has been reported that temperature was clearly positively related to the δ 13 C value extracted from wood, although there were some differences on the δ 13 C value increment per degree centigrade [108,109]. The air temperature, as reflected by carbon isotopes in brown coal, also showed that an overall decline of carbon isotope values within the Garzweiler coal seam possibly indicated a general cooling trend of 2 • C in the late Middle Miocene, which was in accordance with a cooling event recorded in the marine δ 18 O data [115]. Therefore, the temperature might be an important factor controlling vertical variations of the δ 13 C values.…”

Section: Vertical Evolution Of Climatesupporting

confidence: 63%

Peat-Forming Environments and Evolution of Thick Coal Seam in Shengli Coalfield, China: Evidence from Geochemistry, Coal Petrology, and Palynology

et al. 2018

View full text Add to dashboard Cite

Due to the importance of the wide occurrence of thick coal seams for Chinese coal resources, the origins of these seams have received considerable attention. Using the Early Cretaceous No. 5 coal seam with a thickness of 16.8 m in Inner Mongolia as a case study, this paper presents a systematic investigation of the coal petrology, geochemistry, and palynology of 19 coal samples to explain the origin and evolution of peat accumulation. The results indicate that the No. 5 coal seam is generally characterized by low rank (lignite), dominant huminite (average = 82.3%), intermediate ash yield (average = 16.03%), and sulfur content (average = 1.12%). The proportion of spores generally increases from the bottom to the top of the coal seam, whereas the proportion of pollen decreases. The vegetation in the coal seam is dominated by gymnosperms at the bottom and by ferns at the top. The paleographic precursor peat was most likely accumulated in the lakeshore where herbaceous and bushy helophytes were dominant. The total sulfur content was positively related to the huminite content. The sulfur content was possibly derived from bacterial action with sulfur brought in via marine incursions. Three overall declining-increasing values of carbon isotopes within the No. 5 coal seam possibly indicated three general cooling trends during peat accumulation. The environment of peat accumulation included three cycles, including one drying-wetting-drying in the bottom part and two drying-upwards cycles in the upper part. These cycles of the peat-accumulation environment could likely be ascribed to climate change because of their good agreement with humidity signals from plant types at that stage.

show abstract

Section: Vertical Evolution Of Climatesupporting

confidence: 63%

Peat-Forming Environments and Evolution of Thick Coal Seam in Shengli Coalfield, China: Evidence from Geochemistry, Coal Petrology, and Palynology

et al. 2018

View full text Add to dashboard Cite

show abstract

“…British Council grant JRP472. Taylor et al (1992), Francis (1984Francis ( , 1986, Ash and Creber (1992), Francis et al (1994), Jefferson and Taylor (1983), Yadav and Bhattacharyya (1996), Poole and Francis (1999), 5 Morgans et al (1999), Francis (1986), 6 Francis and Poole (2002), Hunt and Poole (2003), Poole et al (2005), 7 Hedges et al (1982), Gon˜i (1997), Kuder and Kruge (1998), 8 van Aarssen et al (2000), Otto et al (1994), 9 Jones (1994), Hesselbo et al (2000), Gro¨cke et al (1999), van Bergen and Poole (2002), Poole et al 2004, 10 Spike andHatcher (1987), Loader et al (2003), 11 Spiker and Hatcher (1987), Bates and Spiker (1992), Lu¨cke et al (1999), 12 Anderson et al (1998), Sauer et al (2000, 13 Lipp et al (1996), Mayr et al (2003), 14 Poole et al (2004). Solid grey line indicates certain applicability of each methodology, dotted grey line indicates the possible applicability if all caveats are acknowledged and discussed (authors' opinion).…”

Section: Resultsmentioning

confidence: 99%

“…Studies focusing on palaeo-, as distinct from past-, climate are more limited and have concentrated predominantly on Tertiary and Cretaceous material (e.g. Lu¨cke et al 1999).…”

Section: Palaeoclimate Signals From Stable Isotopes In Woodmentioning

confidence: 99%

Physiognomic and chemical characters in wood as palaeoclimate proxies

Poole

Bergen

2006

Plants and Climate Change

View full text Add to dashboard Cite

Fossil wood is both abundant and ubiquitous through geological time and space. During growth the parent plant was directly influenced by the biotic and abiotic (including climatic-) factors in the surrounding environment. The climate affects wood production in a number of ways and it is the resulting physiognomic and chemical characters that can help retrodict palaeoclimate. Physiognomic characters include those morphological and anatomical characters that in turn have enabled the use of wood characters, tree ring characters and statistical parameters (Mean Sensitivity) to determine seasonality, length and favourability of growing season, growth rates and forest productivity. Potential chemical characters discussed include (i) the preservation of wood-derived compounds (e.g. guaiacyl, syringyl p-hydroxyphenyl and resins); (ii) degree of lignin degradation to determine climate induced environmental changes; and (iii) stable isotopes (dD, d 13 C and d 18 O) to help determine aspects of past climates as derived from environmental changes. The feasibility and methodology of these characters, in both angiosperm and conifer wood, are reviewed in order to establish certain safe guards, or prerequisites, such that interpretations of palaeoclimate can be as unbiased, and thus as reliable, as possible.

show abstract

“…fossils of leaves (whole leaves and cuticles), wood, propagules etc. (Gro¨cke, 1998;Lu¨cke et al, 1999;Arens et al, 2000;Hesselbo et al, 2000;van Bergen and Poole, 2001;Peters-Kottig et al, 2001). An additional advantage of plant fossils is the fact that specific anatomical and morphological characters of these remains can also be used as they may reflect certain environmental conditions (Ku¨rschner et al, 1996;Wheeler and Baas, 1993;Wiemann et al, 1998Wiemann et al, , 1999.…”

Section: Introductionmentioning

confidence: 99%

Stable carbon isotope changes during artificial charring of propagules

Poole

Braadbaart

Boon

et al. 2002

Organic Geochemistry

View full text Add to dashboard Cite

Charred organic remains are ubiquitous in the archaeological and fossil record and are often used to interpret past environments and climate. This study focuses on the physical and chemical alteration that takes place during heating (i.e. charring). Modifications to the internal and external morphology were noted alongside the change in molecular and stable carbon isotope signature. Molecular analyses were undertaken using direct temperature resolved mass spectrometry and the stable carbon isotopes determined using isotope ratio mass spectrometry. The results of this study document a general enrichment in 13 C/ 12 C composition of charred material which could reflect the changes observed in both the molecular composition and the relative proportions of the molecules formed. These results indicate that spurious results might be inferred when comparing the stable carbon isotope signature of charred/charcoalified material with uncharred organic matter #

show abstract

Environmental history of the German Lower Rhine Embayment during the Middle Miocene as reflected by carbon isotopes in brown coal

Cited by 100 publications

References 48 publications

Peat-Forming Environments and Evolution of Thick Coal Seam in Shengli Coalfield, China: Evidence from Geochemistry, Coal Petrology, and Palynology

Peat-Forming Environments and Evolution of Thick Coal Seam in Shengli Coalfield, China: Evidence from Geochemistry, Coal Petrology, and Palynology

Physiognomic and chemical characters in wood as palaeoclimate proxies

Stable carbon isotope changes during artificial charring of propagules

Contact Info

Product

Resources

About