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The Orebody Character of Pt‐Pd Deposits in the Great Dyke, Zimbabwe
Author(s) -
LIU Jun,
JIN Shuyun
Publication year - 2014
Publication title -
acta geologica sinica ‐ english edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 61
eISSN - 1755-6724
pISSN - 1000-9515
DOI - 10.1111/1755-6724.12371_10
Subject(s) - beijing , china , geological survey , citation , character (mathematics) , library science , history , geology , geochemistry , political science , mining engineering , archaeology , computer science , mathematics , paleontology , geometry
The Great Dyke is a layered mafic-ultramafic body intruded into Archaean granites and greenstone belts. The Dyke is 550km long, north-north-east trending with a maximum width of 12 km. The Dyke developed as a series of initially discrete magma chamber compartments, which coalesced as the chambers filled. Each sub-chamber is divided into two major stratigraphic successions, a lower ultramafic sequence dominated from the base upwards by dunite, harzburgite and pyroxenite, and an upper mafic sequence consisting mainly of gabbro and gabbronorite. There are four remnants of complex (Fig. 1) and the largest one is the Hartley Complex which contains approximately 80% of Zimbabwe’s PGM mineral resources. There are four Pt-Pd mines in Zimbabwe and distribute on the three remaining complex. Mimosa mine is located in the south of Wedza Complex, Unki mine is located in the southern Selukwe Complex, Hartley and Ngezi mines are located in the middle of the Hartley Complex .