The Globe and Mail reports in its Wednesday edition that Endeavour Mining ($24.89) has unveiled a $2.5-billion all-share proposal to buy Centamin ($2.20). The Globe's Niall McGee writes that the unsolicited offer for Centamin is just one many deals happening in the gold sector. On Monday, China's Zijin Mining Group announced it was buying Canada's Continental Gold ($5.33) for $1.4-billion, and just more than a week ago, Kirkland Lake Gold ($55.92) said it intended to snap up Detour Gold ($25.14) for $4.9-billion. Endeavour is offering 0.0846 of its shares for each Centamin share, a 13.1-per-cent premium to Tuesday's closing price. Endeavour argues that Centamin will benefit by being part of a larger, more diversified miner. Endeavour has four mines in West Africa. Endeavour also believes that it would be a better manager of Centamin's Sukari mine. Endeavour first approached Centamin in October of last year and twice in November of this year, but to no avail. It was rebuffed again on Tuesday. Hours after the proposal was made public, Centamin rejected it, arguing the deal would disproportionately benefit Endeavour, and does not "adequately reflect the contribution that Centamin would make to the merged entity."