The Great Oxidation and a Siderian snowball Earth: MIF-S based correlation of Paleoproterozoic glacial epochs

被引：93

作者：

Hoffman, Paul F. ^{[1
,2
]}

机构：

[1] Harvard Univ, Dept Earth & Planetary Sci, Cambridge, MA 02138 USA

[2] Univ Victoria, Sch Earth & Ocean Sci, Victoria, BC V8P 5C2, Canada

来源：

CHEMICAL GEOLOGY | 2013年 / 362卷

关键词：

Oxygen; Atmosphere; Great oxidation; Glaciation; Snowball Earth; Paleoproterozoic; KALAHARI MANGANESE FIELD; MULTIPLE SULFUR ISOTOPES; MASS-INDEPENDENT FRACTIONATION; PROTEROZOIC ESPANOLA FORMATION; PRECAMBRIAN GOWGANDA FORMATION; HOTAZEL IRON-FORMATION; ELLIOT LAKE AREA; TRANSVAAL SUPERGROUP; SOUTH-AFRICA; ATMOSPHERIC OXYGEN;

D O I：

10.1016/j.chemgeo.2013.04.018

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

Existing correlation schemes between early Paleoproterozoic successions divorce the low-latitude Makganyene glaciation in southern Africa from the Great Oxidation (GO), as recorded by the disappearance of mass-independent fractionation of S-isotopes (MIF-S) in sedimentary sulfide and sulfate minerals. They also suggest a younger age for the GO in southern Africa (similar to 2.3 Ga) compared with North America (similar to 2.4 Ga), which is physically implausible. A new correlation scheme is proposed in which the Makganyene glaciation is temporally linked to the GO and to the second of three Huronian glaciations in North America, the onewith postglacial cap-carbonate. In the new scheme, only three glacial epochs are needed globally, all three are represented in southern Africa, and the second was a circa 2.40 Ga snowball Earth coincident with the GO. (C) 2013 Elsevier B. V. All rights reserved.

引用

页码：143 / 156

页数：14