3.0 Systematic Review Methodology
We employed the PRISMA technique (Liberati et al., 2009 ) for data
collection, including identifying the data sources required for the
analysis, screening and checking data eligibility. In this study, we
used a mixture of keywords to classify studies that utilised geophysical
methods to investigate the Bosumtwi Impact Crater. Using three databases
(SCOPUS, Google Scholar and
Dimensions), we searched for articles in English related to geophysical
studies in the Bosumtwi Impact crater from 2000 to date. We assume that
these databases represent a wide range of scientific literature
(Gupta et al., 2018; Gusenbauer and Haddaway, 2020; Waddington et
al., 2012 ). The specific keywords used were “Geophysical” and
“Bosumtwi” OR “Bosumtwe” and “Impact
Crater”. An additional list of
words used in this study is “Seismic” and “Resistivity” and
“Magnetic” and “Gravity” and “GPR” and “Remote Sensing” and
“Electromagnetic”. Table 1 shows the breakdown of the number of
items identified from the three databases. From this search a total of
278 articles; 28 from SCOPUS, 210 from Dimensions and 40 from Google
Scholar were identified. After deleting duplicates, we were left with
117 publications (see Figure 1 ). The resultant studies found from
the literature search were further manually screened by reading their
titles and abstracts. Consequently, we exclude review articles,
technical reports, books, conference papers, and theses. Figure 1shows a schematic workflow for the data screening process.