“…Os isotope data from pelagic successions of Japan show a sharp 187 Os/ 188 Os increase in the Julian (Fig. 4 ), that is interpreted as unradiogenic Os input from Wrangellia emplacement 16 . Figure 4 A comparison of our Western Tethys composite Hg/TOC stratigraphy with Os-isotopes through the same period associated with the Carnian Pluvial Episode recorded in Japan.…”
Section: Discussionmentioning
confidence: 98%
“…A huge amount of Hg was plausibly released by the Carnian Wrangellia oceanic plateau at the time of the CPE. Given the temporal overlap between Wrangellia LIP and the CPE, substantiated by biostratigraphic, radioisotopic, and geochemical data 9 , 16 , 25 , 46 , and in the absence of clear evidence for other dominant Hg drawdown and transport mechanisms, it is plausible to assume a volcanic origin of the additional Hg during the CPE. Wrangellia erupted a minimum of 1 × 10 6 km 3 of basalts onto the Panthalassa ocean floor (Fig.…”
Section: Discussionmentioning
confidence: 99%
“…Wrangellia erupted a minimum of 1 × 10 6 km 3 of basalts onto the Panthalassa ocean floor (Fig. 1 ) at a latitude of about 10–15°N 16 , 18 . The remnants of Wrangellia now outcrop in northwestern America, but coeval oceanic intraplate basalts are also present in east Asia (Sambosan and Taukha belts), which could have been part of the same LIP 16 .…”
Section: Discussionmentioning
confidence: 99%
“…1 ) at a latitude of about 10–15°N 16 , 18 . The remnants of Wrangellia now outcrop in northwestern America, but coeval oceanic intraplate basalts are also present in east Asia (Sambosan and Taukha belts), which could have been part of the same LIP 16 . Os isotope data from pelagic successions of Japan show a sharp 187 Os/ 188 Os increase in the Julian (Fig.…”
Section: Discussionmentioning
confidence: 99%
“…The emplacement of the Wrangellia oceanic plateau, a submarine large igneous province (LIP), has been the main candidate for this scenario 6 , 8 , 9 , 15 – 18 . However, besides age overlap 25 and Os isotope data from deep water successions of Panthalassa that show Wrangellia started in the Early Carnian Trachyceras ammonoid Zone, hereafter referred to as Julian 1 16 , further evidence for volcanic activity in the sedimentary record has been lacking. Hence, a direct temporal link between LIP volcanism and the environmental changes has been difficult to substantiate.…”
The Late Triassic Carnian Pluvial Episode (CPE) was a time of biological turnover and environmental perturbations. Within the CPE interval, C-isotope and sedimentary records indicate multiple pulses of depleted carbon into the atmosphere–ocean system linked to discrete enhancements of the hydrological cycle. Data suggest a similar cascade of events to other extinctions, including being potentially driven by emplacement of a large igneous province (LIP). The age of the Wrangellia LIP overlaps that of the CPE, but a direct link between volcanism and the pulsed CPE remains elusive. We present sedimentary Hg concentrations from Western Tethys successions to investigate volcanic activity through the previously established CPE global negative C-isotope excursions (NCIEs). Higher Hg concentrations and Hg/TOC are recorded just before and during NCIEs and siliciclastic inputs. The depositional settings suggest volcanic Hg inputs into the basins over the NCIEs rather than increases of Hg drawdown or riverine transport. Differences in Hg and Hg/TOC signals between the basins might be linked to coeval LIP style or the temporal resolution of the sedimentary successions. Overall, our new data provide support for a link between pulses of Wrangellia LIP volcanism, NCIEs, and humid phases that mark the CPE in the Western Tethys.
“…Os isotope data from pelagic successions of Japan show a sharp 187 Os/ 188 Os increase in the Julian (Fig. 4 ), that is interpreted as unradiogenic Os input from Wrangellia emplacement 16 . Figure 4 A comparison of our Western Tethys composite Hg/TOC stratigraphy with Os-isotopes through the same period associated with the Carnian Pluvial Episode recorded in Japan.…”
Section: Discussionmentioning
confidence: 98%
“…A huge amount of Hg was plausibly released by the Carnian Wrangellia oceanic plateau at the time of the CPE. Given the temporal overlap between Wrangellia LIP and the CPE, substantiated by biostratigraphic, radioisotopic, and geochemical data 9 , 16 , 25 , 46 , and in the absence of clear evidence for other dominant Hg drawdown and transport mechanisms, it is plausible to assume a volcanic origin of the additional Hg during the CPE. Wrangellia erupted a minimum of 1 × 10 6 km 3 of basalts onto the Panthalassa ocean floor (Fig.…”
Section: Discussionmentioning
confidence: 99%
“…Wrangellia erupted a minimum of 1 × 10 6 km 3 of basalts onto the Panthalassa ocean floor (Fig. 1 ) at a latitude of about 10–15°N 16 , 18 . The remnants of Wrangellia now outcrop in northwestern America, but coeval oceanic intraplate basalts are also present in east Asia (Sambosan and Taukha belts), which could have been part of the same LIP 16 .…”
Section: Discussionmentioning
confidence: 99%
“…1 ) at a latitude of about 10–15°N 16 , 18 . The remnants of Wrangellia now outcrop in northwestern America, but coeval oceanic intraplate basalts are also present in east Asia (Sambosan and Taukha belts), which could have been part of the same LIP 16 . Os isotope data from pelagic successions of Japan show a sharp 187 Os/ 188 Os increase in the Julian (Fig.…”
Section: Discussionmentioning
confidence: 99%
“…The emplacement of the Wrangellia oceanic plateau, a submarine large igneous province (LIP), has been the main candidate for this scenario 6 , 8 , 9 , 15 – 18 . However, besides age overlap 25 and Os isotope data from deep water successions of Panthalassa that show Wrangellia started in the Early Carnian Trachyceras ammonoid Zone, hereafter referred to as Julian 1 16 , further evidence for volcanic activity in the sedimentary record has been lacking. Hence, a direct temporal link between LIP volcanism and the environmental changes has been difficult to substantiate.…”
The Late Triassic Carnian Pluvial Episode (CPE) was a time of biological turnover and environmental perturbations. Within the CPE interval, C-isotope and sedimentary records indicate multiple pulses of depleted carbon into the atmosphere–ocean system linked to discrete enhancements of the hydrological cycle. Data suggest a similar cascade of events to other extinctions, including being potentially driven by emplacement of a large igneous province (LIP). The age of the Wrangellia LIP overlaps that of the CPE, but a direct link between volcanism and the pulsed CPE remains elusive. We present sedimentary Hg concentrations from Western Tethys successions to investigate volcanic activity through the previously established CPE global negative C-isotope excursions (NCIEs). Higher Hg concentrations and Hg/TOC are recorded just before and during NCIEs and siliciclastic inputs. The depositional settings suggest volcanic Hg inputs into the basins over the NCIEs rather than increases of Hg drawdown or riverine transport. Differences in Hg and Hg/TOC signals between the basins might be linked to coeval LIP style or the temporal resolution of the sedimentary successions. Overall, our new data provide support for a link between pulses of Wrangellia LIP volcanism, NCIEs, and humid phases that mark the CPE in the Western Tethys.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
