Olie-۲ (Olievenput) diamond-bearing pipe anomaly in Boshof district, South Africa

At the end of ۲۰۱۴, around the so-called Loxtondal Orangeitic (now called Kaapval-type lamproites) cluster, in Boshof district, two circular anomalies (~۵۴۰ to ~۱۱۰۰ meters in diameter) were identified by Landsat Satellite Images and interpreted as being of "kimberlites" pipes; probable anomaly which were referred to as Olie -۱ and Olie-۲. Subsequently, ۱۰۰ kg of soil samples (horizon A/B) were taken for each of these anomalies. From them there was a high concentration of indicator minerals (IM): olivine, garnets (violets, reds and oranges), chromites, ilmenites, rutile, frosting tourmaline, zircon and among them some crystals of micro and macro diamonds. The high concentration of IM on Olie-۲ led to focus the work on it. IM of Olie-۲ was burned in HFl and by caustic fusion what contributed about ۸۶ macro (

Keywords:

Loxtondal kaapvaal , type lamproite cluster ۳۷.۵ mW/m۲ surface heat flow Large pipe anomalies High concentration of indicator minerals Diamonds