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Petrography and high-resolution geochemical records of Lower Jurassic manganese-rich deposits from Monte Mangart, Julian Alps

Abstract:

Deposits with unusually high Mn contents sampled at Monte Mangart in the Julian Alps include organic-rich marlstone and black shale with interbedded manganoan and siliceous limestone, which were deposited during the early Toarcian Oceanic Anoxic Event. Mn enrichment during that period has been related to global sea-level change coincident with increasing subsidence rate. The formation of Fe-Mn nodules, marking a hardground at the base of the Monte Mangart section, seems to be triggered by rel...

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Authors


Sabatino, N More by this author
Bellanca, A More by this author
More by this author
Institution:
University of Oxford
Department:
Oxford, MPLS, Earth Sciences
Masetti, D More by this author
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Journal:
Palaeogeography, Palaeoclimatology, Palaeoecology
Volume:
299
Issue:
1-2
Pages:
97-109
Publication date:
2011
DOI:
ISSN:
0031-0182
URN:
uuid:aabf3c90-e952-4967-b0ea-abd3ace91b60
Source identifiers:
110425
Local pid:
pubs:110425

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