caa a22 4500 605454841 CHVBK 20210128100209.0 cr unu---uuuuu 210128e20150501xx s 000 0 eng 10.1007/s10064-014-0688-3 doi (NATIONALLICENCE)springer-10.1007/s10064-014-0688-3 Hearn Gareth Hearn Geoserve Ltd, 23 Little Paddocks, BN12 5NJ, Ferring, West Sussex, United Kingdom aut Mapping calcretes in Inhambane province, Mozambique, for use in road construction [Elektronische Daten] [Gareth Hearn] Calcretes have been used extensively in southern Africa, and elsewhere, for low-volume road construction. In Inhambane province of Mozambique, naturally occurring gravels are rare and calcrete is used wherever it is known to occur in reasonable proximity to the road network. While considerable research and development has been undertaken in Botswana, Namibia, and South Africa on the prospecting and engineering usage of calcrete, little work has been undertaken in Mozambique. Remote sensing and field probing, followed by trial pitting and laboratory testing were undertaken in order to locate hitherto unknown deposits of calcrete and to test its basic engineering properties for use in road construction. The findings from other parts of southern Africa were examined in terms of their applicability to Inhambane province, and the locations of existing calcrete borrow pits were examined to determine whether they had common geographical attributes that could assist in the identification of new sources. The study led to the discovery of approximately 20 locations of calcrete potential. Thirteen of these were investigated using trial pits, and ten of these yielded calcrete. A list of additional sites within the vicinity of the road network was developed from remote sensing. The occurrence of calcrete appears to be quite localised within the province and its location is governed by very subtle changes in topography and drainage regime, some of which may be inherited from past climate and environmental factors that are no longer apparent. Springer-Verlag Berlin Heidelberg, 2014 Calcrete prospecting nationallicence Mozambique nationallicence Inhambane province nationallicence Remote sensing nationallicence Vegetation nationallicence Road construction nationallicence Bulletin of Engineering Geology and the Environment Springer Berlin Heidelberg 74/2(2015-05-01), 405-426 1435-9529 74:2<405 2015 74 10064 https://doi.org/10.1007/s10064-014-0688-3 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10064-014-0688-3 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Hearn Gareth Hearn Geoserve Ltd, 23 Little Paddocks, BN12 5NJ, Ferring, West Sussex, United Kingdom aut NATIONALLICENCE 773 0- Bulletin of Engineering Geology and the Environment Springer Berlin Heidelberg 74/2(2015-05-01), 405-426 1435-9529 74:2<405 2015 74 10064