7.2 Huronian-Age Glaciation

Melezhik, Victor A.; Young, Grant M.; Eriksson, P.G.; Altermann, Wladyslaw; Kump, Lee R.; Lepland, Aivo

doi:10.1007/978-3-642-29670-3_2

Cited by 14 publications

(21 citation statements)

References 109 publications

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“…Also, it should be noted that the rock interval between the Sturtian and Marinoan conforms to typical Proterozoic accumulation rates. Melezhik et al (2013) interpret the paleolatitudes and altitudes of deposits from the three Paleoproterozoic Huronian episodes to indicate more extensive glaciation than in Pleistocene times, but not unequivocally of Snowball mode. There may be more support for Snowball mode for the younger Makganyene deposits (Hoffman, 2013).…”

Section: A Rate Compilation Methodsmentioning

confidence: 82%

Slow net sediment accumulation sets snowball Earth apart from all younger glacial episodes

Partin

Sadler

2016

Geology

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Section: A Rate Compilation Methodsmentioning

confidence: 82%

Slow net sediment accumulation sets snowball Earth apart from all younger glacial episodes

Partin

Sadler

2016

Geology

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“…2440 Ma were uplifted, dissected by repeated rifting and affected by erosion and deep weathering within the entire shield area, then followed by the onset of the global-scale Huronian-age glaciation (Marmo and Ojakangas, 1984;Melezhik, 2006;Melezhik et al, 2013c).…”

Section: Introductionmentioning

confidence: 99%

Carbonate deposition in the Palaeoproterozoic Onega basin from Fennoscandia: a spotlight on the transition from the Lomagundi-Jatuli to Shunga events

Melezhik

Fallick

Brasier

et al. 2015

Earth-Science Reviews

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Several deep drillholes were made in the Onega palaeobasin by the Fennoscandian Arctic Russia-Drilling Early Earth Project (FAR-DEEP) of the International Continental ScientificDrilling Program (ICDP). These provided fresh core material documenting the LomagundiJatuli Isotopic Event (LJIE), its termination, and the start of the Shunga Event (SHE) of an enhanced accumulation of organic matter. The cored section represents the most complete known record of the end of the LJIE.The late phase of the LJIE, recorded in FAR-DEEP Core 11A, is represented by the upper part of the Tulomozero Formation (TF), a 300-m-thick unit composed of variegated dolostones, siltstones and shales. Accumulated under oxic conditions on a shallow-water carbonate platform, the TF hosts the earliest known thick formations of halite and massive anhydrite. Low-temperature greenschist facies metamorphism caused partial recrystallisation of the rocks; however, a primary carbonate phase, the dolomite, exhibits a negligible degree of post-depositional alteration of the carbon isotope system. The dataset of 46 bulk-carbonate analyses of carbon and oxygen isotopes yielded  13 C carb ranging between +6.8 and +11.8‰, and revealed a positive excursion from +8 to +11.8‰ followed by a decline to +8‰ towards the top of the 300-m-thick succession.The cored part of the overlying Zaonega Formation (ZF) recovered in holes 12AB and 13A is an 800-m-thick unit composed of mixed siliciclastic-carbonate facies with numerous mafic lava flows and tuff beds intruded by gabbro sills. The formation represents an unprecedented episode of enhanced accumulation of organic-rich rocks and preserves the earliest known supergiant, petrified oilfield, all typifying the SHE. The sedimentological, petrographic, geochemical and C-and O-isotopic study of over 800 m of core throughout the ZF suggests that the initial carbonate deposition occurred in a lacustrine environment, then rapidly proceeding through a lagoonal setting to a rifted deepwater shelf, and finally to a carbonate platform. Both the deepwater shelf and the platformal settings are marked by organic-rich environments. The primary dolomite was potentially exposed to syn-and post-depositional hydrothermal/metasomatic alterations, organic matter diagenesis, metamorphic mineral reactions, CO 2 degassing, and finally a low-temperature, post-metamorphic calcitisation resulting in overall large fluctuations of  13 C carb between -22 and +8‰. The dataset of over 413 bulk-carbonate analyses of carbon and oxygen isotopes, screened petrographically and A C C E P T E D M A N U S C R I P T ACCEPTED MANUSCRIPT4 geochemically against post-depositional alteration, revealed 28 least-altered samples within three stratigraphic intervals, suggesting multiple positive and negative  13 C carb excursions throughout over 1000 m of stratigraphy. A shift from +5 to +9‰ followed by a drop to near zero values marks the lower part of the ZF. A  13 C carb decline from +8‰ to below zero in the middle and upper part of the ZF defines the end of t...

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“…2900 Ma; Young et al, 1998), Paleoproterozoic (2400-2200 Ma; Crowell, 1999;Bekker et al, 2001;Kopp et al, 2005;Melezhik et al, 2013), Neoproterozoic (750-550 Ma;Hoffman and Li, 2009), Paleozoic (a short glacial event at 450 Ma and a longer one at 330-300 Ma; Crowell, 1978;Visser, 1982;Caputo and Crowell, 1985;Hambrey, 1985) and Cenozoic (2.58-0.01 Ma; Pillans and Gibbard, 2012). The glacial diamictites investigated here come from all five of these periods, over five geographic regions: southern Africa, North America, southern China, South America and Greenland.…”

Section: Samplesmentioning

confidence: 99%

Insights into chemical weathering of the upper continental crust from the geochemistry of ancient glacial diamictites

Gaschnig

Rudnick

2016

Geochimica et Cosmochimica Acta

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7.2 Huronian-Age Glaciation

Cited by 14 publications

References 109 publications

Slow net sediment accumulation sets snowball Earth apart from all younger glacial episodes

Slow net sediment accumulation sets snowball Earth apart from all younger glacial episodes

Carbonate deposition in the Palaeoproterozoic Onega basin from Fennoscandia: a spotlight on the transition from the Lomagundi-Jatuli to Shunga events

Insights into chemical weathering of the upper continental crust from the geochemistry of ancient glacial diamictites

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