Massive volcanism at the Permian–Triassic boundary and its impact on the isotopic composition of the ocean and atmosphere

Korte, Christoph; Pande, P.K.; Kalia, Prabha; Kozur, Heinz W.; Joachimski, Michael M.; Oberhänsli, Hedi

doi:10.1016/j.jseaes.2009.08.012

Cited by 135 publications

(69 citation statements)

References 176 publications

(253 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The successions are stratigraphically well constrained by earlier palaeontological and sedimentological studies (Nakazawa et al, 1975;Sweet, 1970;Teichert et al, 1970;Furnish et al, 1973;Kalia and Pande,1989;Pande and Kalia, 1994;Korte et al, 2010 (Okimura and Ishii, 1981;Kalia and Sharma, 1985). Other characteristic Permian fauna reported by previous workers from the Zewan Formation (Nakazawa et al, 1975;Nakazawa and Kapoor, 1981) (Fig 2) and Citharina is recorded from unit A3 and Member D at three kilometers north of Barus (Fig 2).…”

Section: Methodssupporting

confidence: 61%

A Record of Rotaloid Foraminifera from the Upper Permian-Lower Triassic Rocks of Kashmir, India

Pande¹,

Sharma²

2015

mejs

View full text Add to dashboard Cite

show abstract

Section: Methodssupporting

confidence: 61%

A Record of Rotaloid Foraminifera from the Upper Permian-Lower Triassic Rocks of Kashmir, India

Pande¹,

Sharma²

2015

mejs

View full text Add to dashboard Cite

show abstract

“…The sedimentary record of the Permian-Triassic (P-Tr) boundary interval, marked by the largest mass extinction of the Phanerozoic (Erwin, 1993;Alroy et al, 2008), is also characterized by pronounced carbon isotope excursions, which are almost exclusively recorded in bulk rock. However, chemical signatures from this time period include records with a wide variety of amplitudes and shapes and span centimetres to metres of rock sequence (e.g., Xie et al, 2007;Korte et al, 2010). Equally diverse are the proposed drivers of these geochemical signals, ranging from prolonged episodes of volcanism and the eustasy-controlled erosion of organic-rich shelf sediments to abrupt blooms of methane-producing microbes (Renne et al, 1995;Berner, 2002;Rothman et al, 2014).…”

Section: Background: Permian-triassic Carbonate Carbon Isotope Recordsmentioning

confidence: 99%

“…Our new data are complemented by published bulk-carbonate δ 13 C data from multiple P-Tr localities in Central Iran (Abadeh (Heydari et al, 2000;Korte et al, 2004a;Horacek et al, 2007;Korte et al, 2010;Liu et al, 2013), Shahreza (Korte et al, 2004b;Heydari et al, 2008;Richoz et al, 2010) and north-western Iran (Ali Bashi mountains and Zal; Baud et al, 1989;Korte et al, 2004c;Kakuwa and Matsumoto, 2006;Horacek et al, 2007;Richoz et al, 2010;Schobben et al, 2016). For a more global perspective and a comparative approach, we additionally extracted published data from the P-Tr Global Boundary Stratotype Section and Point (GSSP) at Meishan, China (Baud et al, 1989;Chen et al, 1991;Xu and Yan, 1993;Hoffman et al, 1998;Jin et al, 2000;Cao et al, 2002;Gruszczyński et al, 2003;Zuo et al, 2006;Kaiho et al, 2006;Huang et al, 2007;Riccardi et al, 2007;Xie et al, 2007).…”

Section: Complementary Data Collectionmentioning

confidence: 99%

“…Lowstand Transgression Abadeh Abadeh (Korte et al, 2004) Abadeh Abadeh (Richoz et al, 2010) Abadeh 2 (Korte et al, 2010) Ali Bashi (Kakuwa and Matsumoto, 2006) Ali Bashi Ali Bashi (Richoz et al, 2010) Ali Bashi 1 (Baud et al, 1989) Ali Bashi 1 (Schobben et al, 2016) Ali …”

Section: Data Projectionmentioning

confidence: 99%

“…4). On the other hand, the impor-Abadeh (Heydari et al, 2000) Abadeh Abadeh (Korte et al, 2004) Abadeh Abadeh (Richoz et al, 2010) Abadeh 2 (Korte et al, 2010) A b a d e h Meishan (Chen et al, 1991) Meishan (Hoffman et al, 1998) Meishan (Xu & Yan 1993) Meishan (Zuo et al, 2006) Meishan A (Kaiho et al, 2006) Meishan B Meishan B (Jin et al, 2000) Meishan B (Xie et al, 2007) Meishan D (Baud et al, 1989) Meishan D (Cao et al, 2002) Meishan D (Riccardi et al, 2007) Meishan Z (Gruszczyński et al, 2003) Meishan D (Gruszczyński et al, 2003) M e i s h a n ( C h e n e t a l . , 1 9 9 1 ) M e i s h a n ( H o f f m a n e t a l .…”

Section: Model Response To Organic Carbon Accumulationmentioning

confidence: 99%

See 2 more Smart Citations

Latest Permian carbonate carbon isotope variability traces heterogeneous organic carbon accumulation and authigenic carbonate formation

et al. 2017

Self Cite

View full text Add to dashboard Cite

Abstract. Bulk-carbonate carbon isotope ratios are a widely applied proxy for investigating the ancient biogeochemical carbon cycle. Temporal carbon isotope trends serve as a prime stratigraphic tool, with the inherent assumption that bulk micritic carbonate rock is a faithful geochemical recorder of the isotopic composition of seawater dissolved inorganic carbon. However, bulk-carbonate rock is also prone to incorporate diagenetic signals. The aim of the present study is to disentangle primary trends from diagenetic signals in carbon isotope records which traverse the Permian-Triassic boundary in the marine carbonate-bearing sequences of Iran and South China. By pooling newly produced and published carbon isotope data, we confirm that a global first-order trend towards depleted values exists. However, a large amount of scatter is superimposed on this geochemical record. In addition, we observe a temporal trend in the amplitude of this residual δ 13 C variability, which is reproducible for the two studied regions. We suggest that (sub-)sea-floor microbial communities and their control on calcite nucleation and ambient porewater dissolved inorganic carbon δ 13 C pose a viable mechanism to induce bulk-rock δ 13 C variability. Numerical model calculations highlight that early diagenetic carbonate rock stabilization and linked carbon isotope alteration can be controlled by organic matter supply and subsequent microbial remineralization. A major biotic decline among Late Permian bottom-dwelling organisms facilitated a spatial increase in heterogeneous organic carbon accumulation. Combined with low marine sulfate, this resulted in varying degrees of carbon isotope overprinting. A simulated time series suggests that a 50 % increase in the spatial scatter of organic carbon relative to the average, in addition to an imposed increase in the likelihood of sampling cements formed by microbial calcite nucleation to 1 out of 10 samples, is sufficient to induce the observed signal of carbon isotope variability. These findings put constraints on the application of Permian-Triassic carbon isotope chemostratigraphy based on whole-rock samples, which appears less refined than classical biozonation dating schemes. On the other hand, this signal of increased carbon isotope variability concurrent with the largest mass extinction of the Phanerozoic may proPublished by Copernicus Publications on behalf of the European Geosciences Union.

show abstract

Why are the δ¹³C_org values in Phanerozoic black shales more negative than in modern marine organic matter?

Meyers

2014

Geochem Geophys Geosyst

View full text Add to dashboard Cite

The d13 C org values of Phanerozoic black shales average 227&, whereas those of modern marine organic matter average 220&. The black shale isotopic values mimic those of continental organic matter, yet their organic geochemical properties mandate that they contain predominantly marine organic matter. Hypotheses that proposed to explain the low d13 C values of black shales include diagenetic losses of isotopically heavier organic matter components, releases of isotopically light carbon from methane clathrates or extensive magmatic events, greater photosynthetic discrimination against 13 C during times of higher atmospheric pCO 2 , and greenhouse climate stratification of the surface ocean that magnified photic zone recycling of isotopically light organic matter. Although the last possibility seems contrary to the vertical mixing that leads to the high productivity of modern oceanic upwelling systems, it is consistent with the strongly stratified conditions that accompanied deposition of the organic carbon-rich Pliocene-Pleistocene sapropels of the Mediterranean Sea. Because most Phanerozoic black shales contain evidence of photic zone anoxia similar to the sapropels, well-developed surface stratification of the oceans was likely involved in their formation. Existence of isotopically light land plant organic matter during several episodes of extensive magmatism that accompanied black shale deposition implies massive release of mantle CO 2 that added to the greenhouse conditions that favored oceanic stratification. The 13 C depletion common to most Phanerozoic black shales apparently resulted from a greenhouse climate associated with elevated atmospheric pCO 2 that led to a strongly stratified ocean and photic zone recycling of organic matter in, augmented by magmatic CO 2 releases.

show abstract

Massive volcanism at the Permian–Triassic boundary and its impact on the isotopic composition of the ocean and atmosphere

Cited by 135 publications

References 176 publications

A Record of Rotaloid Foraminifera from the Upper Permian-Lower Triassic Rocks of Kashmir, India

A Record of Rotaloid Foraminifera from the Upper Permian-Lower Triassic Rocks of Kashmir, India

Latest Permian carbonate carbon isotope variability traces heterogeneous organic carbon accumulation and authigenic carbonate formation

Why are the δ¹³C_org values in Phanerozoic black shales more negative than in modern marine organic matter?

Contact Info

Product

Resources

About

Massive volcanism at the Permian–Triassic boundary and its impact on the isotopic composition of the ocean and atmosphere

Cited by 135 publications

References 176 publications

A Record of Rotaloid Foraminifera from the Upper Permian-Lower Triassic Rocks of Kashmir, India

A Record of Rotaloid Foraminifera from the Upper Permian-Lower Triassic Rocks of Kashmir, India

Latest Permian carbonate carbon isotope variability traces heterogeneous organic carbon accumulation and authigenic carbonate formation

Why are the δ13Corg values in Phanerozoic black shales more negative than in modern marine organic matter?

Contact Info

Product

Resources

About

Why are the δ¹³C_org values in Phanerozoic black shales more negative than in modern marine organic matter?