Mapping calcretes in Inhambane province, Mozambique, for use in road construction

摘要: 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 calcrete is wherever it known to occur reasonable proximity the network. While considerable research development has undertaken Botswana, Namibia, South Africa on prospecting engineering usage calcrete, little work Mozambique. Remote sensing field probing, followed by trial pitting laboratory testing were order locate hitherto unknown deposits test its basic properties use The findings from other parts examined terms their applicability province, locations existing borrow pits determine whether they had common geographical attributes that could assist identification new sources. study led discovery approximately 20 potential. Thirteen these investigated using pits, ten yielded calcrete. A list additional sites within vicinity network was developed remote sensing. occurrence appears be quite localised location governed very subtle changes topography drainage regime, some which may inherited past climate environmental factors no longer apparent.