Mapping of the late Neoproterozoic Basement rocks and detection of the gold-bearing alteration zones at Abu Marawat-Semna area, Eastern Desert, Egypt using remote sensing data

Application of remotely sensed data in detecting zinc-lead bearing mineralized zones in Westkunlun Huoshaoyun area

“…, which aims to compress a number of correlated spectral bands into a smaller number of uncorrelated spectral bands [10], is used to produce uncorrelated output bands by finding a new set of orthogonal axes that have their origin at the data mean and that are rotated so the data variance is maximized [6]. This compression eliminates redundancy in the data, isolates the noise in the latest PCs, and therefore enhances the separation of certain types of spectral signatures from the background.…”

“…New generation, advanced remote sensing has been used in the past few decades in lithological mapping, mineral exploration and environmental geology [1][2][3][4]. With the development of remote sensing technology that provides detailed information on mineralogy of different rock types on the Earth's surface [5], many image processing methodologies have been developed that attempt to map boundaries of rock bodies, weathered rock zones, and hydrothermally altered rock zones, especially in arid regions where vegetation cover is minimal [6]. Although the results from hyperspectral remote sensing in detecting alteration information are nearly perfect, such data are generally difficult to obtain and having a high cost.…”

Remote sensing based improvement of the geological map of the Neoproterozoic Ras Gharib segment in the Eastern Desert (NE–Egypt) using texture features

“…Sadek and Hassan (2012) revealed that the Landsat ETMEgyptsat-1 fused band ratio image (7/4, 3/7, 4/5) successfully discriminated the volcanic and granitic rocks exposed at Gabal Gharib area, North Eastern Desert. Recently, Hassan and Ramadan (2015) used ratio (6/2, 6/7, 6/5 Â 4/5) of Landsat 8 data to discriminate acidic, basic and intermediate metavolcanics as well as Hammamat sediments at Abu Marawat-Semna area, Eastern Desert, Egypt. Amer et al (2010) used a combination of high and low level principal components (PC) to highlight specific spectral signatures.…”

“…The ratios will therefore be included in the current classification process. d) Band ratio (6/2, 6/7, 6/5 Â 4/5) of Landsat 8 image, used by Hassan and Ramadan (2015) and comparable to Sultan's combination:…”

Late Neoproterozoic basement rocks of Kadabora-Suwayqat area, Central Eastern Desert, Egypt: geochemical and remote sensing characterization

“…2000;Ramadan et al 2001;Kusky and Ramadan 2002;Ferrier et al 2002;Crosta and Filho 2003;Ramadan and Kontny 2004;Liu et al 2007;Zhang et al 2007;Gabr et al 2010). Remotely sensed processed data including ETM and ASTER have been used by many workers (e.g., Sultan et al 1986;Loughlin 1991;Rokos et al 2000;Abdelsalam and Stern 2000;Ramadan et al 2001;Kusky and Ramadan 2002;Ferrier et al 2002;Crosta and Filho 2003;Sadek 2004Sadek , 2005Ninomiya et al 2005Ninomiya et al , 2006Gad and Kusky 2007;Hasan 2009, 2012a, b;Liu et al 2007;Zhang et al 2007;Amer et al 2010;Gabr et al 2010;Aboelkhair et al 2010;Ali-Bik et al 2012;Abou Elmagd et al 2013;Rajendran et al 2013;Asran et al 2013;Hassan and Ramadan 2014;. None of these studies used the interpreted data of Landsat 8 images in geological studies in the Central Eastern Desert of Egypt.…”