Preprints
https://doi.org/10.5194/cp-2023-61
https://doi.org/10.5194/cp-2023-61
31 Aug 2023
 | 31 Aug 2023
Status: a revised version of this preprint was accepted for the journal CP and is expected to appear here in due course.

Weathering trends in the Norian through geochemical and rock magnetic analyses from the Pignola-Abriola Section (Lagonegro Basin, Italy)

Matteo Maron, Tetsuji Onoue, Sara Satolli, Katsuhito Soda, Honami Sato, Giovanni Muttoni, and Manuel Rigo

Abstract. We investigated the geochemical and rock magnetic properties of the magnetostratigraphically-calibrated Pignola-Abriola section (Italy) in order to understand the climatic perturbations that characterize the late Norian–early Rhaetian interval (Late Triassic). We performed experiments on anhysteretic and isothermal remanence (ARM, IRM), and on magnetic susceptibility (χ), to obtain the rock magnetic parameters necessary for our paleoclimatic investigation. An episode of increase in relative quantity of hematite, suggesting enhanced subaerial oxidation of iron minerals, was identified in the Norian from ~217 Ma in the Alaunian up to ~211 Ma in the early Sevatian, followed by a decline up to 207–206 Ma at the end of the Norian (late Sevatian). The results of geochemical and multivariate statistical analyses support a long-term increase and reduction in rock weathering, confirming and extending previous 87Sr/86Sr data from the Pizzo Mondello section (Italy). Possible causes of these long-term weathering trends are the multiphase uplifting of the Cimmerian orogen, occurring at mid northern latitudes along the southern margin of Asia in the Late Triassic, and/or the northward motion of Pangea across the equatorial humid belt. Rapid excursions in oxidized iron minerals have also been observed across the Norian/Rhaetian boundary, the origin of which has still to be determined.

Matteo Maron, Tetsuji Onoue, Sara Satolli, Katsuhito Soda, Honami Sato, Giovanni Muttoni, and Manuel Rigo

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on cp-2023-61', Anonymous Referee #1, 08 Nov 2023
    • AC1: 'Reply on RC1', Matteo Maron, 08 Jan 2024
    • AC3: 'Reply on RC1', Matteo Maron, 09 Jan 2024
  • EC1: 'Comment on cp-2023-61', Yves Godderis, 04 Dec 2023
    • AC2: 'Reply on EC1', Matteo Maron, 08 Jan 2024

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on cp-2023-61', Anonymous Referee #1, 08 Nov 2023
    • AC1: 'Reply on RC1', Matteo Maron, 08 Jan 2024
    • AC3: 'Reply on RC1', Matteo Maron, 09 Jan 2024
  • EC1: 'Comment on cp-2023-61', Yves Godderis, 04 Dec 2023
    • AC2: 'Reply on EC1', Matteo Maron, 08 Jan 2024
Matteo Maron, Tetsuji Onoue, Sara Satolli, Katsuhito Soda, Honami Sato, Giovanni Muttoni, and Manuel Rigo

Data sets

Weathering trends in the Norian: geochemical and rock magnetic dataset from the Pignola-Abriola Section (Lagonegro Basin, Italy) Matteo Maron, Tetsuji Onoue, Sara Satolli, Katsuhito Soda, Honami Sato, Giovanni Muttoni, Manuel Rigo https://data.mendeley.com/datasets/bmbt8t2ywj/1

Matteo Maron, Tetsuji Onoue, Sara Satolli, Katsuhito Soda, Honami Sato, Giovanni Muttoni, and Manuel Rigo

Viewed

Total article views: 516 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
385 108 23 516 12 11
  • HTML: 385
  • PDF: 108
  • XML: 23
  • Total: 516
  • BibTeX: 12
  • EndNote: 11
Views and downloads (calculated since 31 Aug 2023)
Cumulative views and downloads (calculated since 31 Aug 2023)

Viewed (geographical distribution)

Total article views: 521 (including HTML, PDF, and XML) Thereof 521 with geography defined and 0 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Latest update: 24 Feb 2024
Download
Short summary
For a better knowledge of the climate perturbation occurred in the lattermost part of the Triassic Period (Norian-Rhaetian), we investigated the geochemical and rock magnetic properties of the limestones of the Pignola-Abriola section (Lagonegro Basin, Italy). Our investigation revealed at least a major episode of enhanced weathering occurring in the late Norian (~217–211 Ma), possibly related to the Cimmerian orogen and/or the northward motion of Pangea across the equatorial humid belt.