Geochronology and geochemistry of Early Mesoproterozoic meta-diabase
Two major diabase sills and several minor diabase stocks are exposed around the Astingbulake Iron Deposit (Fig. 2). The northern diabase sill is about 2500 m in length and 200–300 m in width (Fig. 3 a), whereas the southern sill is about 2200 m in length and 400 m in width. Many of these diabase sills and stocks intrude the lower …