TY - JOUR
T1 - Protracted post-eruptive basaltic weathering of the Emeishan large igneous province constrained by U[sbnd]Pb CA–ID–TIMS geochronology
AU - Gong, Zheng
AU - Crowley, James L.
AU - Kamo, Sandra L.
AU - Denyszyn, Steven W.
AU - Zhang, Maochao
AU - Li, Jun
AU - Liu, Yanmei
AU - Huang, Chengmin
N1 - Publisher Copyright:
© 2024
PY - 2025/2
Y1 - 2025/2
N2 - The post eruptive basaltic weathering of the Emeishan large igneous province is proposed to cause early Wuchiapingian cooling globally. However, the endpoint of this cooling event has not been evaluated yet, preventing the further understanding of long-term interaction between climate and weathering. In this study, abundant thick and highly weathered basaltic paleosols at the Emeishan volcanic landscapes have been identified, providing direct evidence for intense post-eruptive basaltic weathering. By using CA-TIMS zircon U[sbnd]Pb dating on paleosols and adjacent tuffs, the onset and the termination of the intense weathering are constrained to ∼259.6 Ma and ∼ 253.4 Ma, respectively. The onset of intense weathering is coincident with the early Wuchiapingian cooling, supporting the CO2-forced cooling model triggered by the post-eruptive basaltic weathering of the Emeishan large igneous province. Moreover, the temporal correlation between the long-term weathering and the paleoclimate and carbon isotope records indicate that this cooling is possible persisting until at ∼253.4 Ma.
AB - The post eruptive basaltic weathering of the Emeishan large igneous province is proposed to cause early Wuchiapingian cooling globally. However, the endpoint of this cooling event has not been evaluated yet, preventing the further understanding of long-term interaction between climate and weathering. In this study, abundant thick and highly weathered basaltic paleosols at the Emeishan volcanic landscapes have been identified, providing direct evidence for intense post-eruptive basaltic weathering. By using CA-TIMS zircon U[sbnd]Pb dating on paleosols and adjacent tuffs, the onset and the termination of the intense weathering are constrained to ∼259.6 Ma and ∼ 253.4 Ma, respectively. The onset of intense weathering is coincident with the early Wuchiapingian cooling, supporting the CO2-forced cooling model triggered by the post-eruptive basaltic weathering of the Emeishan large igneous province. Moreover, the temporal correlation between the long-term weathering and the paleoclimate and carbon isotope records indicate that this cooling is possible persisting until at ∼253.4 Ma.
KW - Basaltic weathering
KW - Emeishan large igneous province
KW - Global cooling
KW - Paleosol
KW - Zircon U[sbnd]Pb geochronology
UR - http://www.scopus.com/inward/record.url?scp=85212349684&partnerID=8YFLogxK
U2 - 10.1016/j.palaeo.2024.112666
DO - 10.1016/j.palaeo.2024.112666
M3 - Article
AN - SCOPUS:85212349684
SN - 0031-0182
VL - 659
JO - Palaeogeography, Palaeoclimatology, Palaeoecology
JF - Palaeogeography, Palaeoclimatology, Palaeoecology
M1 - 112666
ER -