FN Archimer Export Format
PT J
TI Palaeoproterozoic oxygenated oceans following the Lomagundi-Jatuli Event
BT 
AF MAND, Kaarel
   LALONDE, Stefan
   ROBBINS, Leslie J.
   THOBY, Marie
   PAISTE, Kart
   KREITSMANN, Timmu
   PAISTE, Paarn
   REINHARD, Christopher T.
   ROMASHKIN, Alexandr E.
   PLANAVSKY, Noah J.
   KIRSIMAE, Kalle
   LEPLAND, Aivo
   KONHAUSER, Kurt O.
AS 1:1,2;2:3;3:4;4:3;5:2,5;6:2;7:2;8:6,7;9:8;10:4,7;11:2;12:2,5,9,10;13:1;
FF 1:;2:;3:;4:;5:;6:;7:;8:;9:;10:;11:;12:;13:;
C1 Univ Alberta, Dept Earth & Atmospher Sci, Edmonton, AB, Canada.
   Univ Tartu, Dept Geol, Tartu, Estonia.
   European Inst Marine Studies, CNRS, UMR6538, Lab Geosci Ocean, Plouzane, France.
   Yale Univ, Dept Geol & Geophys, New Haven, CT USA.
   UiT Arctic Univ Norway, Dept Geosci, CAGE Ctr Arctic Gas Hydrate Environm & Climate, Tromso, Norway.
   Georgia Tech, Sch Earth & Atmospher Sci, Atlanta, GA USA.
   Univ Calif Riverside, NASA, Astrobiol Inst, Alternat Earths Team, Riverside, CA 92521 USA.
   Karelian Sci Ctr, Inst Geol, Petrozavodsk, Russia.
   Geol Survey Norway NGU, Trondheim, Norway.
   Tallinn Univ Technol, Dept Geol, Tallinn, Estonia.
C2 UNIV ALBERTA, CANADA
   UNIV TARTU, ESTONIA
   UBO, FRANCE
   UNIV YALE, USA
   UNIV TROMSO, NORWAY
   GEORGIA TECH, USA
   UNIV CALIF RIVERSIDE, USA
   KARELIAN SCI CTR, RUSSIA
   GEOL SURVEY NORWAY NGU, NORWAY
   UNIV TECH TALLIN, ESTONIA
UM LGO
IF 16.908
TC 41
UR https://archimer.ifremer.fr/doc/00663/77461/82873.pdf
LA English
DT Article
AB The oceans probably remained well-oxygenated for millions of years after the Palaeoproterozoic Lomagundi-Jatuli Event, according to high concentrations and isotope signatures of redox-sensitive metals in the 2-billion-year-old Zaonega Formation, Russia. The approximately 2,220-2,060 million years old Lomagundi-Jatuli Event was the longest positive carbon isotope excursion in Earth history and is traditionally interpreted to reflect an increased organic carbon burial and a transient rise in atmospheric O-2. However, it is widely held that O-2 levels collapsed for more than a billion years after this. Here we show that black shales postdating the Lomagundi-Jatuli Event from the approximately 2,000 million years old Zaonega Formation contain the highest redox-sensitive trace metal concentrations reported in sediments deposited before the Neoproterozoic (maximum concentrations of Mo = 1,009 mu g g(-1), U = 238 mu g g(-1) and Re = 516 ng g(-1)). This unit also contains the most positive Precambrian shale U isotope values measured to date (maximum U-238/U-235 ratio of 0.79 parts per thousand), which provides novel evidence that there was a transition to modern-like biogeochemical cycling during the Palaeoproterozoic. Although these records do not preclude a return to anoxia during the Palaeoproterozoic, they uniquely suggest that the oceans remained well-oxygenated millions of years after the termination of the Lomagundi-Jatuli Event.
PY 2020
PD APR
SO Nature Geoscience
SN 1752-0894
PU Nature Publishing Group
VL 13
IS 4
UT 000519843400001
BP 302
EP 306
DI 10.1038/s41561-020-0558-5
ID 77461
ER

EF