An Early Carboniferous seep community and hydrocarbon-derived carbonates from the Harz Mountains, Germany

Peckmann, Jörn; Gischler, Eberhard; Oschmann, Wolfgang; Reitner, Joachim

doi:10.1130/0091-7613(2001)029<0271:aecsca>2.0.co;2

Cited by 105 publications

(63 citation statements)

References 32 publications

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“…Since the "seep-search strategy" was proposed by Campbell and Bottjer [22], more and more ancient seep deposits were discovered and studied. Today, ancient hydrocarbon seeps have already been recognized from Devonian to Quaternary strata in almost all continents based on occurrences of seep carbonates and/or fossil chemosynthetic assemblages [10,13,14,[16][17][18][19][20][23][24][25][26][27][28]. However, seep carbonates are rarely found from ancient strata in the mainland China.…”

Section: Hcomentioning

confidence: 99%

“…The diagnostic features of ancient seep carbonates commonly include low  13 C values of early diagenetic carbonate phases, special sedimentary fabrics such as clotted micrites, peloids and framboid pyrites, the occurrence of low diversity but high abundance faunal assemblage fossils and distinct 13 C-depleted biomarkers [10,13,14,[16][17][18][19][20][21]. Since the "seep-search strategy" was proposed by Campbell and Bottjer [22], more and more ancient seep deposits were discovered and studied.…”

Section: Hcomentioning

confidence: 99%

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First discovery and characterizations of late Cretaceous seep carbonates from Xigaze in Tibet, China

Tong

Chen

2012

Chin. Sci. Bull.

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Hydrocarbon seeps, widely occurring in continental margins, have become increasingly focused owing to their close relationships with gas hydrates, strong greenhouse gas methane, and biological resources in extreme environments. Ancient hydrocarbon seeps have already been recognized from Devonian to Quaternary strata worldwide based on seep carbonates or seep-related fossil chemosynthetic assemblages. However, seep-related deposits are rarely found from ancient strata in the mainland China. Here, we report the first discovery of an ancient seep deposit, specifically late Cretaceous seep carbonates from Xigaze in Tibet, China. Xigaze seep carbonates, occurring as nodules, are enclosed in upper Cretaceous turbidite strata in Xigaze forearc basin. These carbonates are composed of authigenic carbonate (56.2% on average), clastic quartz and feldspar (27.3% on average), and clay minerals (chlorite, illite and smectite, 16.5% on average). Clotted micrites, peloids and framboid pyrites are frequently observed, all of which are common in modern seep carbonates. The carbonates have negative  13 C values varying from 27.7‰ to 4.0‰ (V-PDB), suggesting that thermogenic methane is the primary carbon source. Ce/Ce* values revised by eliminating La effects show no real Ce anomaly, indicating the carbonates were primarily precipitated in a weak reducing environment. Overall, these features provide unequivocal evidences that the seafloor of Xigaze forearc basin developed hydrocarbon seeps in late Cretaceous. seep carbonate, carbon isotope, sedimentary fabric, Xigaze, late Cretaceous Citation:Tong H P, Chen D F. First discovery and characterizations of late Cretaceous seep carbonates

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Section: Hcomentioning

confidence: 99%

Section: Hcomentioning

confidence: 99%

First discovery and characterizations of late Cretaceous seep carbonates from Xigaze in Tibet, China

Tong

Chen

2012

Chin. Sci. Bull.

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“…They commonly form cluster accumulations as an adaptive response to these very restricted confined habitats. Cold-seep deposits are often characterized by mass occurrences and dense populations of packed individuals (Callender and Powell, 1999;Peckmann et al, 2001Peckmann et al, , 2007Peckmann et al, , 2011Peckmann et al, , 2013Kiel and Peckmann, 2008;Sandy et al, 2012). In addition to the exceptional profusion of specimens, these habitats show monospecific or oligotypical communities (Callender and Powell, 1999;Gischler et al, 2003;Kaim et al, 2010;Peckmann et al, 2013).…”

Section: Palaeontological Proxies-gregarious Behaviour Can Be Includmentioning

confidence: 99%

Evolution of the last koninckinids (Athyridida, Koninckinidae), a precursor signal of the early Toarcian mass extinction event in the Western Tethys

Baeza-Carratalá

Joral

Giannetti

et al. 2015

Palaeogeography, Palaeoclimatology, Palaeoecology

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“…However, the absence of impsonite (biodegraded oil; e.g. Peckmann et al, 2001) argues against an oil seepage origin.…”

Section: Accepted M Manuscriptmentioning

confidence: 99%

“…It has been suggested that since at least the Late Devonian until the Early Cretaceous, seeps were largely dominated by dimerelloid rhynchonellid brachiopods (Peckmann et al, 2007;Sandy, 2010;Kiel et al, 2014), with molluscs also present, although often subordinate (e.g. Peckmann et al, 1999Peckmann et al, , 2001Peckmann et al, , 2011;…”

Section: Introductionmentioning

confidence: 99%

Late Jurassic–Early Cretaceous hydrocarbon seep boulders from Novaya Zemlya and their faunas

Hryniewicz

Hagström

Hammer

et al. 2015

Palaeogeography, Palaeoclimatology, Palaeoecology

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The paper describes Late Jurassic-Early Cretaceous seep carbonate boulders from the Russian Arctic island of Novaya Zemlya, collected in 1875 by A.E. Nordenskiöld during his expedition to Siberia. The carbonates are significantly depleted in heavy carbon isotopes Other seep faunas with similar taxonomic structure are suggestive of rather shallow water settings, but in case of Novaya Zemlya seep faunas such structure might result also from high northern latitude.

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An Early Carboniferous seep community and hydrocarbon-derived carbonates from the Harz Mountains, Germany

Cited by 105 publications

References 32 publications

First discovery and characterizations of late Cretaceous seep carbonates from Xigaze in Tibet, China

First discovery and characterizations of late Cretaceous seep carbonates from Xigaze in Tibet, China

Evolution of the last koninckinids (Athyridida, Koninckinidae), a precursor signal of the early Toarcian mass extinction event in the Western Tethys

Late Jurassic–Early Cretaceous hydrocarbon seep boulders from Novaya Zemlya and their faunas

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