Geological Context Mapping of Batouri Gold District (East Cameroon) from Remote Sensing Imagering, GIS Processing and Field Works

Abstract

The Batouri area is located in the Adamawa-Yade domain in East Cameroon region, and has a high geological potential as a host for gold deposits. It is covered by thick forest where outcrops are sometime scarce. The purpose of this study is to generate and combine different geological information which makes up the specificity of the Batouri gold District, in order to contribute to the better knowledge of its geological setting. From satellite imageries, GIS tools and field data; lithological units, lineament and density maps have been dressed at regional-scale of 1/400.000. The mapping has enabled the discovery of spatial and topologic relationships between shear zones, lineaments, gold occurrences and often mineralized granitic intrusions. According to the field data, lithological and lineament maps, the lithology of the Batouri gold District is characterized by alkali granitoids (tonalite, granodiorite, syenomonzo-granite, alkaline granite) hosted by orthogneisses and migmatites as gold mineralization hosts; while the lineaments show a major shear zones trending NE-SW defined by presence of mylonites. The shear zones crosscut all lithologies, mostly granodiorite where majority of gold occurrences is observed; locally, nearest these shear zones, rocks are transformed to the mylonites and gold is concentrated along. From density map, it is shown that the high gold mineralization zone corresponds to highest lineaments density. All those data suggest that gold mineralization in the Batouri district is controlled by tectonic and lithology. It is conclusive that Batouri gold deposit is epigenetic gold set emplaced in orogenic setting, during the post-collisional stage of the Central African Fold Belt (CAFB) and the Congo Craton (CC).

RETRACTED ARTICLE: Big data classification of remote sensing image based on cloud computing and convolutional neural network

“…(2) Features and classification of cloud computing Cloud computing has several outstanding characteristics [12][13]: 1) Data is safe and reliable.…”

Geological Structure Control on the Formation of Metal Mineralization at Quartz Veins in Jendi Village, Wonogiri Regency, Central Java

“…These rocks are faulted by a northwest-southeast (NW-SE) trending right horizontal fault. This right horizontal fault plays an important role in volcanism and magmatism [8], [9] and mineralization [23], [24] in the study area. The study area is part of the central facies of the Gajah Mungkur ancient volcano [2], [25].…”

Pola Struktur Geologi Pembentuk Zona Mineralisasi Di Bukit Randu, Kecamatan Selogiri, Kabupaten Wonogiri, Jawa Tengah

“…Penggunaan mineral logam di dunia akan makin meningkat terutama emas (Hasria dkk, 2017). Keberadaan mineral emas selalu berhubungan dengan aktivitas magma atau gunung api (Hartono, dkk, 2014, Putranto dkk., 2016, Harjanto, dkk, 2016 dan dipengaruhi oleh struktur sesar (Fridovsky, et al, 2018, Song, et al, 2018, Chauvet, 2019dan Berger, 2016. Mereka mengemukakan bahwa secara geometri, urat dapat dijumpai pada zona ekstensional ataupun kompresonal dari sistem sesar mendatar yang membentuk pola en-echelon, dimana sesar relatif saling sejajar, satu sama lain terletak pada jalur/posisi yang berbeda namun secara keseluruhan membentuk satu zona memanjang.…”

“…Batuan di daerah penelitian tersesarkan oleh sesar dekstral baratlaut-tenggara (NW-SE). Sebagai bagian dari fasies pusat gunung api purba Gajah Mungkur (Hartono, dkk., 2014, Verdiansyah dkk, 2021, sesar ini berperanan penting dalam vulkanisme dan magmatisme (Song, et al, 2018, Tuduri et al, 2018) serta mineralisasi (Pluijm, 2004, Claude et al, 2019 Sesar dekstral di daerah penelitian sangat aktif pada masanya, sehingga melahirkan berbagai batuan dari lingkungan pembentukan yang makin dalam. Batuan tersebut adalah batuan ekstrusif-eksplosif (lava-breksi di permukaan), batuan intrusi dangkal (andesit) hingga batuan intrusi dalam (mikrodiorit) pada fasies pusat gunung api Miosen.…”

“…Deformasi multi fase pada daerah mineralisasi emas dilaporkan oleh penelitian Fridovsky et al (2018). Adanya urat yang terpotong oleh urat lain yang muda di daerah penelitian mendukung adanya beberapa kali mineralisasi dan deformasi.…”