Abstract
No abstract available. doi:10.2204/iodp.sd.8.03.2009
Highlights
In the Barberton Scientific Drilling Program (BSDP) we successfully completed three drill holes in 2008 across strategically selected rock formations in the early Archean Barberton Greenstone Belt, South Africa
The second chert unit was intercepted at a depth of about 115 m below surface; it occurs at the center of a 30-m-wide zone of highly silicified basalt that is generally associated with a number of discontinuous black chert lenses and veins
Near the end of KD1, a 20-m-thick zone occurs with thin black chert veins and consists of carbonate and quartz bands and veins in a matrix of dark green fuchsite (Cr-muscovite), chlorite, and magnetite
Summary
In the Barberton Scientific Drilling Program (BSDP) we successfully completed three drill holes in 2008 across strategically selected rock formations in the early Archean Barberton Greenstone Belt, South Africa. This collaborative project’s goal is to advance understanding of geodynamic and biogeochemical processes of the young Earth. The program aims to better define and characterize Earth’s earliest preserved ocean crust shear zones and microbial borings in Archean basaltic glass, and to identify biogeochemical fingerprints of ancient ecological niches recorded in rocks. During the period July–August 2008, a first phase of drilling yielded three boreholes with a total of 800 m of core with 99% core recovery in the early Archean Barberton Greenstone Belt (BGB), South Africa. The rocks around Barberton are unique in that they represent relatively intact and undisturbed remnants of preserved ancient seafloor and continental crust that have largely escaped tectonometamorphic reworking since the time they formed (Schoene et al, 2008)
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