Hydrocarbon seeps from close to the Jurassic–Cretaceous boundary, Svalbard

Hammer, Øyvind; Nakrem, Hans Arne; Little, Crispin T. S.; Hryniewicz, Krzysztof; Sandy, Michael R.; Hurum, Jørn H.; Druckenmiller, Patrick; Knutsen, Espen M.; Høyberget, Magne

doi:10.1016/j.palaeo.2011.03.019

Cited by 75 publications

(55 citation statements)

References 60 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…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%

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

Tong

Chen

2012

Chin. Sci. Bull.

View full text Add to dashboard Cite

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

show abstract

Section: Hcomentioning

confidence: 99%

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

Tong

Chen

2012

Chin. Sci. Bull.

View full text Add to dashboard Cite

show abstract

“…Petrographical proxies.-Fossil cold-seep deposits recurrently show distinctive petrographical attributes and microfabrics. Characteristics such as clotted micrite, fibrous, banded and bothryoidal cement or framboidal pyrite, even in the form of aggregations or laminae, are typically found in the methane-seep carbonates (Campbell et al, 2002;Peckmanm and Thiel, 2004;Peckmann et al, 2007Peckmann et al, , 2011Hammer et al, 2011;Kuechler et al, 2012;Sandy et al, 2012;Kiel et al, 2013;Kaim et al, 2013). These features are completely absent in the lithologies herein studied and petrographic evidences (Fig.…”

mentioning

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

View full text Add to dashboard Cite

“…These specimens had been tentatively referred to Monticlarella by Sandy in Hammer et al (2011); they have a similar outline to Monticlarella triloboides (Quenstedt) in Childs (1969, pl. I, figs.…”

Section: Jurassic-cretaceous Brachiopods Svalbardmentioning

confidence: 92%

Brachiopods from Late Jurassic—Early Cretaceous hydrocarbon seep deposits, central Spitsbergen, Svalbard

Sandy

Hryniewicz

Hammer

et al. 2014

Zootaxa

Self Cite

712

View full text Add to dashboard Cite

Late Jurassic-Early Cretaceous (Late Volgian-latest Ryazanian) rhynchonellate brachiopods are described from eight out of 15 hydrocarbon seep deposits in the Slottsmøya Member of the Agardhfjellet Formation in the Janusfjellet to Knorringfjellet area, central Spitsbergen, Svalbard. The fauna comprises rhynchonellides, terebratulides (terebratuloids and loboidothyridoids) and a terebratellidine. The rhynchonellides include: Pseudomonticlarella varia Smirnova; Ptilorhynchia mclachlani sp. nov.; and Ptilorhynchia obscuricostata Dagys. The terebratulides belong to the terebratuloids: Cyrtothyris? sp.; Cyrtothyris aff. cyrta (Walker); Praelongithyris? aff. borealis Owen; and the loboidothyridoids: Rouillieria cf. michalkowii (Fahrenkohl); Rouillieria aff. ovoides (Sowerby); Rouillieria aff. rasile Smirnova; Uralella? cf. janimaniensis Makridin; Uralella? sp.; Pinaxiothyris campestris? Dagys; Placothyris kegeli? Harper et al.; and Seductorithyris septemtrionalis gen. et sp. nov. The terebratellidine Zittelina? sp. is also present. Age determinations for all but one of the brachiopod-bearing seeps are based on associated ammonites. Five of the seep carbonates have yielded Lingularia similis?, and it is the only brachiopod species recorded from two of the seeps. Other benthic invertebrate taxa occurring in the seeps include bivalves, gastropods, echinoderms, sponges, and serpulid and non-serpulid worm tubes. The brachiopod fauna has a strong Boreal palaeobiogeographic signature. Collectively, the Spitsbergen seep rhynchonellate brachiopods exhibit high species richness and low abundance (<100 specimens from 8 seeps). This contrasts markedly with other Palaeozoic-Mesozoic brachiopod-dominated seep limestones where brachiopods are of low diversity (typically monospecific) with a super-abundance of individuals. The shallow water environmental setting for the Spitsbergen seeps supported a diverse shelf fauna, compared to enigmatic Palaeozoic-Mesozoic brachiopod-dominated seeps.

show abstract

Hydrocarbon seeps from close to the Jurassic–Cretaceous boundary, Svalbard

Cited by 75 publications

References 60 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

Brachiopods from Late Jurassic—Early Cretaceous hydrocarbon seep deposits, central Spitsbergen, Svalbard

Contact Info

Product

Resources

About