Paleosalinity significance of occurrence and distribution of methyltrimethyltridecyl chromans in the Upper Cretaceous Nenjiang Formation, Songliao Basin, China

Wang, Li; Song, Zhiguang; Yin, Qingrui; George, Simon C.

doi:10.1016/j.orggeochem.2011.08.012

Cited by 59 publications

(44 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The SK1 (S) core cuts most of the Upper Cretaceous section, which is subdivided into the Quantou (K 2 q), Qingshankou (K 2 qn), Yaojia (K 2 y), and Nenjiang (K 2 n) formations in ascending order. During this period, the basin developed two major layers of organicrich source rocks: Members 1 and 2 of the Qingshankou Formation (K 2 qn 1+2 ) and members 1 and 2 of the Nenjiang Formation (K 2 n 1+2 ) (Wang et al, 2011).…”

Section: Geological Settingmentioning

confidence: 99%

Late Cretaceous palynology and paleoclimate change: Evidence from the SK1 (South) core, Songliao Basin, NE China

Zhao

Wan

et al. 2014

Sci. China Earth Sci.

View full text Add to dashboard Cite

Cretaceous climate was warmer than today. The Songliao Basin contains one of the most important Late Cretaceous non-marine deposits in China for the research of the paleoenvironment and paleoclimate. This research is based on core samples from the SK1(S) borehole. The strata sampled are the upper part of the Quantou Formation to member 2 of the Nenjiang Formation, where spores, pollen, dinoflagellates, and other microfossils are abundantly preserved. Based on analysis of the spores and pollen fossils from the core samples, the following six fossil assemblage zones have been recognized in ascending order: The . The six fossil zones range from the late Cenomanian to early Campanian. The Late Cretaceous dinoflagellate cysts in the Songliao Basin are of high abundance and low diversity. Specific phytoplankton types reflect salinity changes of the Songliao Lake. Paleoecology of the dinoflagellates suggests that sediments of members 2 and 3 of the Yaojia Formation (K 2 y 2+3 ) were deposited in a freshwater environment, whereas members 2 and 3 of the Qingshankou Formation (K 2 q 2+3 ) and members 1 and 2 of the Nenjiang Formation (K 2 n 1+2 ) were deposited in freshwater to brackish water environments. Combined with the paleoecology of dinoflagellates and the palynomorph biozones, valuable information of the paleoclimate was provided. The quantitative analyses of spores and pollen fossils, such as vegetation type, climate type, and humidity type, diversity and dominance, indicate a relatively sub-humid, mid-subtropical paleoclimate, with slight climatic fluctuation and/or temporal change.Late Cretaceous, Songliao Basin, spores and pollen, dinoflagellate, paleoclimate Citation:Zhao J, Wan X Q, Xi D P, et al. 2014. Late Cretaceous palynology and paleoclimate change: Evidence from the SK1 (South) core,

show abstract

Section: Geological Settingmentioning

confidence: 99%

Late Cretaceous palynology and paleoclimate change: Evidence from the SK1 (South) core, Songliao Basin, NE China

Zhao

Wan

et al. 2014

Sci. China Earth Sci.

View full text Add to dashboard Cite

show abstract

“…of organic rich source rocks in the K 2 n 1 member (Wang et al, 2011). This stratification was most likely a combination of chemical and physical conditions including salinity, redox status and water temperatures.…”

Section: Organic Matter Source Input and Depositional Environmentsmentioning

confidence: 99%

A biomarker study of depositional paleoenvironments and source inputs for the massive formation of Upper Cretaceous lacustrine source rocks in the Songliao Basin, China

Song

Yin

George

et al. 2013

Palaeogeography, Palaeoclimatology, Palaeoecology

Self Cite

View full text Add to dashboard Cite

“…Although the specific origin and formation pathway of MTTCs (V) in geological samples remain unclear, the ratio between different chroman isomers has been established as a reliable indicator for paleosalinity (e.g. Grice et al, 1998c;Schwark and Püttmann, 1990;Schwark et al, 1998;Sinninghe Damsté et al, 1987Wang et al, 2011). Hypotheses for the formation of MTTCs (V) include direct biosynthesis by phytoplanktonic organisms (Sinninghe Damsté et al, 1993), early diagenetic condensation reactions of phytol with alkylphenols (e.g.…”

Section: Introductionmentioning

confidence: 99%

Molecular proxies as indicators of freshwater incursion-driven salinity stratification

et al. 2015

View full text Add to dashboard Cite

Salinity-related stratification in marine environments is one of the main drivers for the development of persistent anoxia and euxinia. It therefore plays a vital role in the sedimentary preservation of organic matter and has also been associated with Oceanic Anoxic Events during several mass extinctions in Earth's history.Here we present a novel molecular proxy using relative abundances of methyltrimethyltridecylchromans (MTTCs) as indicators of riverine freshwater incursions into Middle to Late Devonian paleoreefs exposed to conditions of prevailing anoxia, photic zone euxinia and water column stratification. This paper aims at re-instigating a discussion about the origin of these compounds to potentially broaden their utilization as paleoproxies, adding freshwater stratification to the general salinity reconstructions. The co-variation of MTTC abundance profiles and δ 13 C values with other biomarker parameters in the sediments studied here indicate a link of MTTCs to terrigenous input, pointing towards a previously suggested early diagenetic formation of these compounds from phytol with higher plant-derived alkylphenols.

show abstract

Paleosalinity significance of occurrence and distribution of methyltrimethyltridecyl chromans in the Upper Cretaceous Nenjiang Formation, Songliao Basin, China

Cited by 59 publications

References 15 publications

Late Cretaceous palynology and paleoclimate change: Evidence from the SK1 (South) core, Songliao Basin, NE China

Late Cretaceous palynology and paleoclimate change: Evidence from the SK1 (South) core, Songliao Basin, NE China

A biomarker study of depositional paleoenvironments and source inputs for the massive formation of Upper Cretaceous lacustrine source rocks in the Songliao Basin, China

Molecular proxies as indicators of freshwater incursion-driven salinity stratification

Contact Info

Product

Resources

About