Frequency ratio-based flood vulnerability modeling over the greater Accra Region of Ghana

Depth‐based correlation analysis between the density of lineaments in the crystalline basement's weathered zones and groundwater occurrences within the Voltaian basin, Ghana

“…In order to assess the spatial relationship between the SDM produced and groundwater occurrence locations within them, they were discretized into five classes of very low, low, moderate, moderately high and very high structural density zones based on the Jenks natural breaking classification technique (Forson, Amponsah, et al., 2023; Jenks, 1963). This was carried out by overlaying known locations of groundwater occurrences (borehole yields) on the SDM (shown in Figure 9a,b).…”

“…The frequency ratio (FR) is a bivariate geostatistical approach that determines the spatial correlation of various classes of a geospatial model with respect to known locations of natural resource occurrence over a region of study. Thus, the aforementioned approach has proven worthy in determining the spatial association of various geospatial models with respect to known locations of occurrences such as groundwater (P. O. Amponsah et al., 2023), mineral (P. O. Amponsah & Forson, 2023; Ghezelbash et al., 2021), flooding (Forson, Amponsah, et al., 2023; Forson & Menyeh, 2023), hydrocarbon (Arab Amiri et al., 2015) and landslide (Vakhshoori & Zare, 2016). The FR score for a particular class i ($$FR_i$$) of the structural density model is mathematically expressed as shown in Equation ().…”

“…Thus, the aforementioned approach has proven worthy in determining the spatial association of various geospatial models with respect to known locations of occurrences such as groundwater (P. O. , mineral (P. O. Ghezelbash et al, 2021), flooding (Forson, Amponsah, et al, 2023;Forson & Menyeh, 2023), hydrocarbon (Arab Amiri et al, 2015) and landslide (Vakhshoori & Zare, 2016). The FR score for a particular class 𝑖 (𝐹 𝑅 𝑖 ) of the structural density model is mathematically expressed as shown in Equation (1).…”

The geology and geochemistry of the Rhyacian Josephine gold deposit, Northwest Ghana

“…The Birimian straddles countries like Mali, Ivory Coast, Ghana, Niger, Senegal and Burkina Faso. Architecturally, the Birimian in Ghana is made up of five northeast-southwest trending greenstone belts (Amponsah 2012; Perrouty et al 2012; Nunoo et al 2016; Forson et al 2022, 2023; Agra et al 2023) as well as a north–south oriented greenstone belt (Amponsah et al 2015; Amponsah et al 2016a, 2016b; Asiedu et al 2019; Sapah et al 2020; Nunoo et al 2022a, 2022b), with intervening basins (Amponsah 2016a; Davis et al 1994). The Wa-Lawra belt in Ghana, which runs in a north–south direction, forms a segment of the broader Boromo belt that stretches northward into Burkina Faso (Baratoux et al 2011; Block et al 2016; Feng et al 2018, 2019).…”

New evidence for crustal reworking and juvenile arc‐magmatism during the Palaeoproterozoic Eburnean events in the Suhum Basin, South‐east Ghana

“…Architecturally, the Palaeoproterozoic (ca 2.27 to 1.96 Ga) Birimian in Ghana, which covers the western half of Ghana (Figure 1), occupies the south‐eastern portion of West Africa Craton (sWAC). The Birimian is composed of a series of sub‐parallel linear arcuate north‐east–south‐west or north–south trending granitoid‐greenstone belts (namely the Kibi‐Winneba (Kw), Ashanti (As), Bui (Bu), Bole‐Nangondi (Bn) and Wa‐Lawra (Lw) Belts) and intervening sedimentary basins (Suhum, Cape Coast, Kumasi, Sunyani and Maluwe basins), both of which have been intruded by episodic paroxysmal syn‐to‐post tectonic granitoid mounds and elongated migmatite‐granitoid domes (Figure 1; Amponsah et al, 2015, 2016; Asiedu et al, 2019; Block, et al, 2016b; Block, et al, 2015; Block et al, 2016a; Feng et al, 2018, 2019; Forson et al, 2020, 2021, 2022; Forson & Menyeh, 2023; Hirdes et al, 1996; Leube et al, 1990; Masurel et al, 2022; Nunoo et al, 2022; Sakyi et al, 2014; Salvi et al, 2016; Sapah et al, 2021) which lasted the entire Eburnean orogeny (Allibone et al, 2002; Baratoux et al, 2011). The rocks have all been affected by widespread greenschist to amphibolite‐facies metamorphism during the Eburnean orogeny at ca.…”