Dyke swarms and associated lava formations in the northern Lebombo monocline, Karoo Large Igneous Province, South Africa
作者单位：EGRISchool of GeosciencesUniversity of the WitwatersrandWits 2050South Africa Department of GeologyRhodes UniversityGrahamstown 6140South Africa School of Geological SciencesUniversity of KwaZulu-NatalDurban 4041South Africa
会议名称：《International Conference on Continental Volcanism》
会议日期：2006年
学科分类：0709[理学-地质学] 070901[理学-矿物学、岩石学、矿床学] 07[理学]
摘 要：正As one of the early classical examples of plume-generated Large Igneous Provinces （LIPs）, the Karoo is characterized by a bulls-eye distribution of High-Ti basalts, picrites, and earliest nephelinites onto a conspicuous triple rift junction （i.e., Okavango dyke swarm and the two Mwenezi- and Lebombo monoclines）, surrounded by Low-Ti basalts. It is noted that this regional distribution between high- and low-Ti basalts within the Jurassic Karoo LIP differs from that of the Permian Emeishan LIP;thereby undermining the use of this particular