Processes on the Early Earth, Wydanie 405W. U. Reimold, Roger Lawrence Gibson Geological Society of America, 1 sty 2006 - 407 "This Special Paper presents a collection of 19 papers contributed to a joint Field Forum organized by the Geological Society of America and the Geological Society of South Africa in July 2004 in the Barberton Greenstone Belt and the Vredefort Dome, South Africa. The papers cover a wide variety of themes, including Archean and Proterozoic crust formation and geodynamics (with an appraisal of evidence of Archean subduction processes); the significance of impacts in the evolution of the early Earth's crust; traces of early life in Archean environments of Australia and South Africa and related studies of depositional environments; and processes affecting the giant Witwatersrand gold deposit."--Publisher's website. |
Spis treści
The early years | 23 |
Diagenetic alteration of impact spherules in the Neoarchean Monteville layer | 57 |
UPb LuHf and morphological characteristics | 75 |
Precise UPb Zircon IDTIMS ages provide an alternative interpretation to early | 91 |
The 3 466 Ga Kittys Gap Chert an Early Archean microbial ecosystem | 105 |
Microfacies and origin of some Archean cherts Pilbara Australia | 133 |
Contrasting source components of clastic metasedimentary rocks in the lowermost | 157 |
The significance of subductionrelated accretionary complexes in early Earth processes | 173 |
SHRIMP zircon age constraints on Mesoarchean crustal development in | 233 |
Physical volcanology and compositions of the basaltic lavas in the Archean | 255 |
The structuralmetamorphic evolution of the northern margin of the Zimbabwe | 291 |
A result of Archean to Proterozoic Turkictype orogenesis? | 315 |
Origin of hydrothermal fluids and gold mineralization associated with | 333 |
The nature of hydrocarbons and related fluids in the Witwatersrand Basin | 353 |
Conditions of gold remobilization in the Ventersdorp Contact Reef | 387 |
| 403 | |
A reevaluation of Archean intracratonic terrane boundaries on the Kaapvaal Craton | 193 |
Kluczowe wyrazy i wyrażenia
accretion accretionary Agatha Formation amphibolite Anhaeusser Archean Barberton greenstone belt Barton basalt batholith biofilms bitumen breccia Byerly carbon carbonaceous chert clasts complex composition core crustal deformation deposits detrital dome Drennan early Archean early Earth emplacement evolution facies felsic flow lobes fluid inclusions fragments geochemical Geological Society Gneiss gold grains granite granitoid Hadean Heerenveen batholith hydrothermal impact event impact melt indicate intrusive isotopic Johannesburg Journal of Geology K-feldspar Kaapvaal Craton Koeberl komatiites Kröner lava Limpopo Belt Lowe mafic magmatic mantle metamorphic meteorite Migmatitic mineral Monteville nodules northern occur ophiolite pahoehoe particles Planetary Science pluton Precambrian Precambrian Research pyrite quartz veins quartzite region Reimold Robb rocks samples sedimentary sediments sequence shear zones Society of America South Africa southern spherule layers subduction sulfides Supergroup tectonic temperature textures tion U-Pb ultramafic Ventersdorp Ventersdorp Contact Reef vesicles volcanic Vredefort Witwatersrand Basin Zimbabwe Craton zircon