Geologic evolution of the Barberton greenstone belt, South Africa / Геологическая эволюция зеленокаменного пояса Барбертон, Южная Африка

The Swaziland Supergroup in the Barberton Greenstone Belt (BGB) consists of a lower, predominantly volcanic sequence, the Onverwacht Group; a middle volcaniclastic and quartz-poor clastic succession, the Fig Tree Group; and an upper quartzose terrigenous unit, the Moodies Group. In classic sections in the Onverwacht anticline, the Onverwacht Group includes 8 to 10 km of komatiitic, basaltic, and dacitic volcanic rocks and thin, silicified sedimentary layers that have been subdivided, from base to top, into the Komati, Hooggenoeg, and Kromberg Formations, and a new unit, the Mendon Formation. The ages and stratigraphic relationships of the highly altered Sandspruit and Theespruit Formations in the anticline are not fully resolved, but the latter includes felsic volcanic components that are in part older than the Komati Formation and in part correlative with dacitic volcanic units at the top of the Hooggenoeg Formation. However, in the Steynsdorp anticline, rocks assigned to the Theespruit Formation lie stratigraphically below the Komati Formation and include the oldest dated stratigraphic units in the Swaziland Supergroup. <...>

1.Stratigraphy of the west-central part of the Barberton Greenstone Belt, South Africa, Donald R. Lowe and Gary R. Byerly
2.Structural divisions and development of the west-central part of the Barberton Greenstone Belt Donald R. Lowe, Gary R. Byerly, and Christoph Heubeck
3.Petrology and sedimentology of cherts and related silicifted sedimentary rocks in the Swaziland Supergroup Donald R. Lowe
4.Modes of accumulation of carbonaceotis matter in the Early Archean: A petrographic and geochemical study of the carbonaceous cherts of the Swaziland Supergroup Maud M. Walsh and Donald R. Lowe
5.Geochemistry of mafic and ultramafic rocks in the Kromberg Formation in its type section, Barberton Greenstone Belt, South Africa T. W. Vennemann and H. S. Smith
6.Subaqueous to subaerial Archean ultramafic phreatomagmatic volcanism, Kromberg Formation, Barberton Greenstone Belt, South Africa Barbara Ransom, Gary R. Byerly, and Donald R. Lowe
7.Sedimentology, mineralogy, and implications of silicified cvaporites in the Kromberg Formation, Barberton Greetistone Belt, South Africa Donald R. Lowe and Gail Fisher Worrell
8.Komatiites of the Mendon Formation: Late-stage ultramafic volcanism in the Barberton Greenstone Belt Gary R. Byerly
9.Shallow-water sedimentation of accretionary lapilli-bearing strata of the Msauli Chert: Evidence of explosive hydromagmatic komatiitic volcanism Donald R. Lowe
10.Foreland basin sedimentation in the Mapepe Formation, southern-facies Fig Tree Group Donald R. Lowe and Bruce W. Nocita
11.Sedimentary petrography and provenance of the Archean Moodies Group, Barberton Greenstone Belt Christoph Heubeck and Donald R. Lowe
12.Geologic evolution of the Barberton Greetistone Belt and vicinity Donald R. Lowe