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Drilling Through the Largest Magma Chamber on Earth: Bushveld Igneous Complex Drilling Project (Bicdp) : Volume 19, Issue 19 (29/05/2015)

By Trumbull, R. B.

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Book Id: WPLBN0004021598
Format Type: PDF Article :
File Size: Pages 5
Reproduction Date: 2015

Title: Drilling Through the Largest Magma Chamber on Earth: Bushveld Igneous Complex Drilling Project (Bicdp) : Volume 19, Issue 19 (29/05/2015)  
Author: Trumbull, R. B.
Volume: Vol. 19, Issue 19
Language: English
Subject: Science, Scientific, Drilling
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2015
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

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Webb, S. J., Ashwal, L. D., Veksler, I. V., & Trumbull, R. B. (2015). Drilling Through the Largest Magma Chamber on Earth: Bushveld Igneous Complex Drilling Project (Bicdp) : Volume 19, Issue 19 (29/05/2015). Retrieved from http://hawaiilibrary.net/


Description
Description: GFZ German Research Centre for Geosciences, Telegrafenberg, 14473 Potsdam, Germany. A scientific drilling project in the Bushveld Igneous Complex in South Africa has been proposed to contribute to the following scientific topics of the International Continental Drilling Program (ICDP): large igneous provinces and mantle plumes, natural resources, volcanic systems and thermal regimes, and deep life. An interdisciplinary team of researchers from eight countries met in Johannesburg to exchange ideas about the scientific objectives and a drilling strategy to achieve them. The workshop identified drilling targets in each of the three main lobes of the Bushveld Complex, which will integrate existing drill cores with new boreholes to establish permanently curated and accessible reference profiles of the Bushveld Complex. Coordinated studies of this material will address fundamental questions related to the origin and evolution of parental Bushveld magma(s), the magma chamber processes that caused layering and ore formation, and the role of crust vs. mantle in the genesis of Bushveld granites and felsic volcanic units. Other objectives are to study geophysical and geodynamic aspects of the Bushveld intrusion, including crustal stresses and thermal gradient, and to determine the nature of deep groundwater systems and the biology of subsurface microbial communities.

Summary
Drilling through the largest magma chamber on Earth: Bushveld Igneous Complex Drilling Project (BICDP)

Excerpt
Ashwal, L. D., Webb, S. J., and Knoper, M. W.: Physical and mineralogical properties of Bushveld rocks: magnetic susceptibility and mineral chemistry profiles in the 2950 m Bellevue drillcore, Northern Lobe, S. Afr. J. Geol., 108, 199–232, 2005.; Bryan, S. E. and Ernst, R. E.: Revised definition of large igneous provinces (LIPs), Earth-Sci. Rev., 86, 175–202, 2008.; Buchanan, P. C., Reimold, W. U., Koeberl, C., and Kruger, F. J.: Rb-Sr and Sm-Nd isotopic compositions of the Rooiberg Group: early Bushveld-related volcanism, Lithos, 29, 373–388, 2004.; Buick, I. S., Maas, R., and Gibson, R.: Precise U-Pb titanite age constraints on the emplacement of the Bushveld Complex, South Africa, J. Geol. Soc. London, 158, 3–6, 2001.; Kgaswane, E. M., Nyblade, A. A., Durrheim, R. J., Julià, J., Dirks, P. H. G. M., and Webb, S. J.: Shear wave velocity structure of the Bushveld Complex, South Africa, Tectonophysics, 554, 83–104, 2012.; Maier, W. D., Barnes, S., and Groves, D. I.: The Bushveld Complex, South Africa: formation of platinum-palladium, chrome- and vanadium-rich layers via hydrodynamic sorting of a mobilized cumulate slurry in a large, relatively slowly cooling, subsiding magma chamber, Miner. Deposita, 48, 1–56, 2013.; Mathez, E. A., Van Tongeren, J. A., and Schweitzer, J.: On the relationships between the Bushveld Complex and its felsic roof rocks, part 1: petrogenesis of the Rooiberg and related felsites, Contrib. Mineral. Petr., 166, 435–449, 2013.; Roelofse, F. and Ashwal, L. D.: Lower Main Zone in the northern limb of the Bushveld Complex – A > 1.3 km thick sequence of intruded and variably contaminated crystal mushes, J. Petrol., 53, 1449–1476, 2012.; Scoates, J. S. and Friedman, R. M.: Precise age of the platiniferous Merensky reef, Bushveld Complex, South Africa, by the U-Pb zircon chemical abrasion ID-TIMS technique, Econ. Geol., 103, 465–471, 2008.; Tanner, D., Mavrogenes, J. A., Arculus, R. J., and Jenner, F. E.: Trace element stratigraphy of the Bellevue core, northern Bushveld: magma injections obscured by diffusive processes, J. Petrol., 55, 859–882, 2014.; Tegner, C., Cawthorn, R. G., and Kruger, F. J.: Cyclicity in the main and upper zones of the Bushveld Complex South Africa: crystallization from a zoned magma sheet, J. Petrol., 47, 2257–2279, 2006.; VanTongeren, J., Mathez, E. A., and Kelemen, P.: A felsic end to Bushveld differentiation, J. Petrol., 51, 1891–1942, 2010.; Walraven, F.: Geochronology of the Rooiberg Group, Transvaal Supergroup, South Africa, Economic Geology Research Unit, Information Circular 316, Johannesburg, University of the Witwatersrand, 1997.; Webb, S. J., Nguuri, T. K., Cawthorn, R. G., and James, D. E.: Gravity modelling of Bushveld Complex connectivity supported by southern African seismic experiment results, S. Afr. J. Geol., 107, 207–218, 2004.; Webb, S. J., Ashwal, L. D., and Cawthorn, R. G.: Continuity between eastern and western Bushveld Complex, confirmed by xenoliths from kimberlites, Contrib. Mineral. Petr., 162, 101–107, 2011.; Zeh, A., Ovtcharova, M., Wilson, A., and Schaltegger, U.: The Rustenburg Layered Suite (Bushveld Complex) crystallized in less than 1.6 million years – constraints from CA-ID-TIMS dating, geothermometry and inclusions in zircon, 21st Meeting of the International Mineralogical Association, 1–5 September, 2014, Johannesburg, Abstracts volume: 348, 2014.

 

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