Major and trace element analyses of ODP Leg 120 volcanic rocks (Table 1)@en

Widespread Lower Cretaceous magmatism occurred along the Indian-Australian/Antarctic margins, and in the juvenile Indian Ocean, during the rifting of eastern Gondwana. The formation of this magmatic province probably began around 120-130 Ma with the eruption of basalts on the Naturaliste Plateau and at Bunbury, western Australia. On the northeast margin of India, activity began around 117 Ma with the Rajmahal continental basalts and associated lamprophyre intrusions. The formation of the Kerguelen Plateau in the Indian Ocean began no later than 114 Ma. Ultramafic lamprophyres (alnoites) were emplaced in the Prince Charles Mountains near the Antarctic continental margin at ~ 110 Ma. These events are considered to be related to a major mantle plume, the remnant of which is situated beneath the region of Kerguelen and Heard islands at the present day. […]东冈瓦纳裂解时期，印澳/南极大陆边缘及新生印度洋范围内广泛发育下白垩纪岩浆活动。该岩浆省的形成可能始于120~130 Ma，当时西澳大利亚的班伯里及纳奇斯特利高原上喷发了玄武岩。在印度东北部陆缘，岩浆活动始于约117 Ma，伴随拉杰马哈陆相玄武岩及伴生煌斑岩侵入体的形成。印度洋内的凯尔盖朗高原形成不晚于114 Ma。约110 Ma时，超镁铁质煌斑岩（alnoites）侵位于南极大陆边缘附近的查尔斯王子山脉中。上述地质事件被认为与一处大型地幔柱有关，现今该地幔柱的残留体位于凯尔盖朗岛与赫德岛下方区域。[...]