Tsodilo Resources (CVE:TSD), has completed the drilling of 20 core holes as part of its evaluation program to establish a geological model for the 5 hectare BK16 kimberlite in Botswana’s Orapa Kimberlite Field, the rights to which were acquired in September 2014.
Tsodilo wants to optimize the outlay of the large diameter drill (LDD) holes for the forthcoming bulk sampling program.
The company said that a total 3,662.2 meters were but only 17, five vertical and twelve inclined, of the 20 holes will be used for the geological model, because three had to be re-drilled due to difficult ground conditions.
A geological and geotechnical study of the core is being conducted at Tsodilo’s facility in Maun including photography, logging and magnetic susceptibility readings while samples from selected kimberlite phases have been submitted for petrographic analysis.
Using a binocular microscope, kimberlite specialist, Dr. Jock Robey, identified five different phases of kimberlite: Red volcanoclastic kimberlite VK1, Black VK2, Grey VK3, VKXXX and coherent kimberlite CK1.
The analysis suggests that the VK2 and VK3 kimberlite phases are the most relevant volumetrically and these will be the focus of the LDD program to be finalized after the completion of the geological model.
In 2014, the Orapa Kimberlite Field produced 13,355,292 carats and over the past decade, Botswana diamond mines have produced an average of 27 million carats annually. Botswana is the world's largest producer of diamonds by value.
The company has an initial prospecting grant of three years on the license, which became effective on October 1, 2014. Tsodilo has now completed 51 line km of high intensity magnetics on the pipe.
The BK16 pipe is part of the Orapa Kimberlite Field (OKF), which is made up of at least 83 kimberlite bodies, varying in size from insignificant to the 110 hectare AK1 kimberlite which is the Orapa Mine.
Tsodilo also has a joint venture in Botswana with First Quantum Minerals (TSE:FM), which launched an aggressive grassroots program on the project, optioning 70 percent in August of 2013.
The junior explorer is developing prospective diamond, copper and iron properties in Botswana, with the metal licenses that cover the First Quantum-Tsodilo joint venture also extending to Tsodilo's Xaudum iron ore project, where an NI 43-101 technical report recently revealed an inferred resource of 441 million tonnes with an average grade of 29.4% iron.