Exploratory and Descriptive Study of the Kimberlite Massif of Boya-02 at Eastern Kasai in the Democratic Republic of Congo  

作　　者：Arnold Onya Ngila Ivon Ndala Tshiwisa Ruben Koy Kasongo Serge Diemo Alain Cibumba Cibumba Chamira Fwani Pambu Dona Kampata Mbwelele Arnold Onya Ngila;Ivon Ndala Tshiwisa;Ruben Koy Kasongo;Serge Diemo;Alain Cibumba Cibumba;Chamira Fwani Pambu;Dona Kampata Mbwelele(Centre National de Télédétection (CNT), Kinshasa, The Democratic Republic of Congo;Department of Exploration, Faculty of Oil and Gas, University of Kinshasa, Kinshasa, The Democratic Republic of Congo;Geo-Hydro-Energy Research Group, Department of Geosciences, Faculty of Sciences and Technologies, University of Kinshasa, Kinshasa, The Democratic Republic of Congo)

机构地区：[1]Centre National de Télédétection (CNT), Kinshasa, The Democratic Republic of Congo [2]Department of Exploration, Faculty of Oil and Gas, University of Kinshasa, Kinshasa, The Democratic Republic of Congo [3]Geo-Hydro-Energy Research Group, Department of Geosciences, Faculty of Sciences and Technologies, University of Kinshasa, Kinshasa, The Democratic Republic of Congo

出　　处：《Journal of Geoscience and Environment Protection》2024年第1期130-144,共15页地球科学和环境保护期刊（英文）

摘　　要：The Boya-02 kimberlite was identified at depth by geophysical survey work (a single-probe AM survey in 1997 and a gravity survey in 2006) that De Beers DRC Exploration carried out around anomaly 193/172/0019. This anomaly located approximately 50 km southwest of the town of Mbuji-Mayi in the Kasaï-Oriental Province in the DRC should therefore be the subject of detailed exploration with the aim of better identifying and describing this kimberlite. Thus, through exploratory work and cross-checking of geophysical and geological data, the discovery of this Massif was made by drilling on the aeromagnetic anomaly 193/172/X298. Based on drilling, sampling and laboratory petrographic analysis reports, the Boya-02 kimberlite was classified among highly diluted re-sedimented volcaniclastic kimberlites (KVR), rich in olivine and incidentally in quartz and poor in juvenile substances. This kimberlite represents a deposit of very low economic interest following extremely high dilution. The Boya-02 kimberlite was modeled using ground magnetism data. It is a complex anomaly comprising 2 components with variable amplitude appearing on a subtly magnetized linear detail. The modeled dimensions of two components of this anomaly are 0.32 Ha and 0.2 Ha at depths of 32 m & 14 m for the deposits to the West and the East respectively. Garnet data for the Boya-02 occurrence reports a maximum Pmin value of 49.7 kbar (207 garnets). These data demonstrate the high diamond potential which assumes a conductive cratonic geotherm of 40 mWm².The Boya-02 kimberlite was identified at depth by geophysical survey work (a single-probe AM survey in 1997 and a gravity survey in 2006) that De Beers DRC Exploration carried out around anomaly 193/172/0019. This anomaly located approximately 50 km southwest of the town of Mbuji-Mayi in the Kasaï-Oriental Province in the DRC should therefore be the subject of detailed exploration with the aim of better identifying and describing this kimberlite. Thus, through exploratory work and cross-checking of geophysical and geological data, the discovery of this Massif was made by drilling on the aeromagnetic anomaly 193/172/X298. Based on drilling, sampling and laboratory petrographic analysis reports, the Boya-02 kimberlite was classified among highly diluted re-sedimented volcaniclastic kimberlites (KVR), rich in olivine and incidentally in quartz and poor in juvenile substances. This kimberlite represents a deposit of very low economic interest following extremely high dilution. The Boya-02 kimberlite was modeled using ground magnetism data. It is a complex anomaly comprising 2 components with variable amplitude appearing on a subtly magnetized linear detail. The modeled dimensions of two components of this anomaly are 0.32 Ha and 0.2 Ha at depths of 32 m & 14 m for the deposits to the West and the East respectively. Garnet data for the Boya-02 occurrence reports a maximum Pmin value of 49.7 kbar (207 garnets). These data demonstrate the high diamond potential which assumes a conductive cratonic geotherm of 40 mWm².

关 键 词：Exploratoire MASSIF Kimberlitique Kasaï Oriental 

分 类 号：F42[经济管理—产业经济]