More information:

Rajmon, D., Copeland, P. and Reid, A. 2005. Argon isotopic analysis of breccia veins from the Roter Kamm crater, Namibia, and implications for their thermal history. Meteoritics and Planetary Science, 40(6): 841-854


Description:

Argon isotopic analysis of breccia veins from the Roter Kamm crater, Namibia, and implications for their thermal history.

Summary / Notes:

The rocks exposed in the rim of the 2.5‐km‐wide and 3.7‐Ma‐old Roter Kamm crater in southwest Namibia are cut by breccia veins that macroscopically resemble, and were originally described as, pseudotachylytes. The veins were later shown to be cataclasites with no evidence for melting. 40Ar/39Ar data for vein and host rock samples indicate a low‐grade metamorphic event at around 300 Ma, but provide no evidence for an impact age. The samples have suffered 5–7% Ar loss, which we associate with the impact event. All the samples record similar ranges of possible time‐temperature conditions and there are no resolvable differences between the results for the vein and the host rock samples, as would be expected if frictional heating played an important role in breccia formation. Modeling the 40Ar/39Ar data, assuming instantaneous impact heating followed by extended cooling, and coupling these results to published data on fluid inclusions, quartz precipitation, shock effects, and crater degradation, suggest that the veins reached maximum temperatures of 230–290 °C during impact and never approached melting temperatures of the precursor rocks.

Year: 2005

Type: Journal Article

Download: Argon isotopic analysis of breccia veins from the Roter Kamm crater.pdf (7.75 mb)

Preview: Preview this file


Top 50 related results:

You may also be interested in the following items which are on a similar or related topic, listed in order of similarity.

Results per page:

Results: 1 to 30 of 30

To FILTER: Use the pale green row to filter the results on this page. Type in text or select from the year list.

Rows matching filter(s): All
What is this row? 
Data titleYearOriginFile typeDownloadkml/kmz
Dincer, T., Hutton, L.G. and Kupee, B.B.J. 1981. Study, using stable isotopes of flow distribution, surface-groundwater relations and evapotranspiration in the Okavango Swamp, Botswana. I.A.E.A, Vienna, Proc. Ser. SII/AUB/493: 3-26
  » More info & related results
1981Bibliography compiled for Okavango River: The flow of a lifeline.Report2.37 mb pdf
Preview
Dincer, T. and Hutton, L.G. Using stable isotopes, of flow distribution, surface-ground water relations and evaporation in the Okavango swamp, Botswana. FAO Project investigation of Okavango Delta, Maun, Geological Survey of Botswana, Lobatse
  » More info & related results
Bibliography compiled for Okavango River: The flow of a lifeline.Report
Durham,E.L., Maslin, M.A., Platzman, E., Rosell-Melé, A., Marlow, J.R., Leng, M., Lowry, D. and Burns, S.J. 2001. Reconstructing the climatic history of the western coast of Africa over the past 1.5 M.Y. Proceedings of the Ocean Drilling Program, Scientific Results, 175
  » More info & related results
2001 Book, Book Section, Booklet3.25 mb pdf
Preview
Scott, L. and Vogel, J.C. 2000. Evidence for environmental conditions during the last 20 000 years in Southern Africa from 13C in fossil hyrax dung. Global and Planetary Change, vol 26, 03 January, pp 207-215
  » More info & related results
2000CSIRJournal Article
Schachtschneider, K. and February, E.C. 2010. The relationship between fog, floods, groundwater and tree growth along the lower Kuiseb River in the hyperarid Namib. Journal of Arid Environments, 74(12): 1632-1637
  » More info & related results
2010 Journal Article
Ségalen, L., Renard, M., Lee-Thorp, J.A., Emmanuel, L., le Callonnec, L., de Rafélis, M., Senut, B., Pickford, M. and Melice, J-L. 2006. Neogene climate change and emergence of C4 grasses in the Namib, southwestern Africa, as reflected in ratite 13C and 18 O. Earth and Planetary Science Letters, 244(3-4): 725-734
  » More info & related results
2006DRFN DLIBJournal Article
Segalen, L., Renard, M., Pickford, M., Senut, B., Cojan, I., le Callonnec, L. and Rognon, P. 2002. Environmental and climatic evolution of the Namib Desert since the Middle Miocene: the contribution of carbon isotope ratios in ratite eggshells. Comptes Rendus Geoscience, 334(12): 917-924
  » More info & related results
2002DRFN DLIBJournal Article
Carr, A.S., Boom, A. and Chase, B.M. 2010. The potential of plant biomarker evidence derived from rock hyrax middens as an indicator of palaeoenvironmental change. Palaeogeography, Palaeoclimatology, Palaeoecology, 285(3–4): 321–330
  » More info & related results
2010 Journal Article
Schukat, A., Auel, H., Teuber, L., Lahajnar, N. and Hagen, W. 2014. Complex trophic interactions of calanoid copepods in the Benguela upwelling system. Journal of Sea Research, 85: 186–196
  » More info & related results
2014 Journal Article
Kasemann, S.A., Hawkesworth, C.J., Prave, A.R., Fallick, A.E. and Pearson, P.N. 2005. Boron and calcium isotope composition in Neoproterozoic carbonate rocks from Namibia: evidence for extreme environmental change. Earth and Planetary Science Letters, 231(1–2): 73–86
  » More info & related results
2005 Journal Article
Reid, D.L. and Cooper, A.F. 1992. Oxygen and carbon isotope patterns in the Dicker Willem carbonatite complex, southern Namibia. Chemical Geology: Isotope Geoscience Section, 94(4): 293–305
  » More info & related results
1992 Journal Article
Rathmann, S. and Kuhnert, H. 2008. Carbonate ion effect on Mg/Ca, Sr/Ca and stable isotopes on the benthic foraminifera Oridorsalis umbonatus off Namibia. Marine Micropaleontology, 66(2): 120–133
  » More info & related results
2008 Journal Article
Amit, R., Enzel, Y., Grodek, T., Crouvi, O., Porat, N. and Ayalon, A. 2010. The role of rare rainstorms in the formation of calcic soil horizons on alluvial surfaces in extreme deserts. Quaternary Research, 74(2): 177–187
  » More info & related results
2010 Journal Article
Collins, J.A., Schefuß, E., Govin, A., Mulitza, S. and Tiedemann, R. 2014. Insolation and glacial-interglacial control on southwestern African hydroclimate over the past 140 000 years. Earth and Planetary Science Letters, 398: 1–10
  » More info & related results
2014 Journal Article
Jennings, C.M.H., Sellschop, J.P.F., Verhagen, B.Th. and Jones, M.T. 1973. Environmental isotopes as an aid to investigation of ground water problems in Botswana. Botswana Notes and Records, 5: 179-190
  » More info & related results
1973 Journal Article
Soderberg, K., Henschel, J., Swap, R.J. and Macko, S.A. 2014. Sulphur isotopes in the central Namib Desert ecosystem. Transactions of the Royal Society of South Africa: Special Issue: A Festschrift for Professor Mary Seely, 69(3): 217-223
  » More info & related results
2014 Journal Article330 kb pdf
Preview
Kaseke, K.F., Wang, L., Wanke, H., Turewicz, V. and Koeniger, P. 2016. An analysis of precipitation isotope distributions across Namibia using historical data. PLoS ONE, 11(5): e0154598
  » More info & related results
2016 Journal Article3.12 mb pdf
Preview
Sracek, O., Wanke, H., Ndakunda, N.N., Mihaljevič, M. and Buzek, F. 2015. Geochemistry and fluoride levels of geothermal springs in Namibia. Journal of Geochemical Exploration, 148: 96–104
  » More info & related results
2015 Journal Article1.48 mb pdf
Preview
Badewien, T., Vogts, A., Dupont, L. and Rullkötter, J. 2015. Influence of Late Pleistocene and Holocene climate on vegetation distributions in southwest Africa elucidated from sedimentary n-alkanes – Differences between 12°S and 20°S. Quaternary Science Reviews, 125: 160–171
  » More info & related results
2015 Journal Article
Arfè, G., Boni, M., Balassone, G., Mondillo, N., Hinder, G. and Joachimski, M. 2017. New C - O isotopic data on supergene minerals from the Skorpion and Rosh Pinah ore deposits (Namibia): Genetic and paleoclimatic constraints. Journal of African Earth Sciences, 126: 148–158
  » More info & related results
2017 Journal Article
Soderberg, K., Henschel, J., Billmark, K., Swap, R. and Macko, S. 2010. Multiple stable isotope tracers of fog use by Namib Desert plants. Geophysical Research Abstracts, 12: EGU2010-7683
  » More info & related results
2010 Journal Article51 kb pdf
Preview
Soderberg, K., Henschel, J. and Macko, S.A. 2009. Water isotopes and the ecohydrology of fog in the Central Namib Desert: Initial results. Geophysical Research Abstracts, 11, EGU2009-1315, 2009 EGU General Assembly
  » More info & related results
2009 Report132 kb pdf
Preview
Vogel, J.C. and Seely, M.K. 1977. Occurrence of C4 plants in the Central Namib Desert. Madoqua, 10(1): 75-78
  » More info & related results
1977 Journal Article389 kb pdf
Preview
Riddell, E.S., Kilian, W., Versfeld, W. and Kosoana, M. 2016. Groundwater stable isotope profile of the Etosha National Park, Namibia: short communication. Koedoe: African Protected Area Conservation and Science, 58(1): 1-7
  » More info & related results
2016 Journal Article
Grösslová, Z., Vaněk, A., Oborná, V., Mihaljevič, M., Ettler, V., Trubač, J., Drahota, P., Penížek, V., Pavlů, L., Sracek, O., Kříbek, B., Voegelin, A., Göttlicher, J., Drábek, O., Tejnecký, V., Houška, J., Mapani, B. and Zádorová, T. 2018. Thallium contamination of desert soil in Namibia: Chemical, mineralogical and isotopic insights. Environmental Pollution, 239: 272-280
  » More info & related results
2018 Journal Article
Orani, A.M., Vassileva, E., Renac, C., Schmidt, S., Angelidis, M.O., Rozmaric, M. and Louw, D. 2019. First assessment on trace elements in sediment cores from Namibian coast and pollution sources evaluation. Science of The Total Environment, 669: 668-682
  » More info & related results
2019 Journal Article
Schachtschneider, K. and Reinecke, K. 2014. Riparian trees as common denominators across the river flow spectrum: are ecophysiological methods useful tools in environmental flow assessments?. Water SA, 40(2): 287-296
  » More info & related results
2014 Journal Article327 kb pdf
Preview
Naude, K. 2010. A stable isotope study of the hydrological systems in the Naukluft region in Namibia. MsC Thesis, University of Cape Town
  » More info & related results
2010 Thesis16.6 mb pdf
Preview
Kaseke, K.F., Tian, C., Wang, L., Seely, M., Vogt, R., Wassenaar, T. and Mushi, R. 2018. Fog Spatial Distributions over the Central Namib Desert - An Isotope Approach. Aerosol and Air Quality Research, 18: 49–61
  » More info & related results
2018 Journal Article6.52 mb pdf
Preview
Rajmon, D., Copeland, P. and Reid, A. 2005. Argon isotopic analysis of breccia veins from the Roter Kamm crater, Namibia, and implications for their thermal history. Meteoritics and Planetary Science, 40(6): 841-854
  » More info & related results
2005 Journal Article7.75 mb pdf
Preview

» Links to useful free software for working with shapefiles, kml and kmz files, pdf files and more.