Large igneous province (LIP) record of Venus: insights from giant radiating Graben-Fissure systems, and comparison with earth

地球经常“打嗝”，从地球内部突然大量释放岩浆(熔岩)，这些岩浆上升到地壳，随着熔岩的流动部分溢出到地表。这些火成岩大省(嘴唇)的规模确实很大。最大的火山拥有8000万立方千米的岩浆，但它们通常包含约100万立方千米。唇部由持续一百万年或更短时间的单个脉冲或多个脉冲组成，并且发生在板内环境中；换句话说，它们与任何板块边界无关。嘴唇引发灭绝事件，分裂超级大陆，是丰富矿藏的宿主。这些事件在地球历史上是如此重要，以至于它们代表了一种“心跳”或“地球的脉搏”(www.nuna2007.ca；www.largeigneousprovinces.org)。

On a frequent basis, the Earth 'belches' and there is a sudden and major release of magma (molten rock) from the Earth's interior, which rises into the Earth's crust and partly spills out on the surface as lava flows. These Large Igneous Provinces (LIPs) are truly immense in scale. The largest has a volume of magma of 80 million cubic kilometres, but they more typically encompass about 1 million cubic kilometres. LIPs consist of a single pulse or multiple pulses lasting a million years or less, and occur in an intraplate setting; in other words they are not related to any plate boundaries. LIPs cause extinction events, break up super-continents, and are the hosts for rich ore deposits. These events are so prominent in Earth history that they represent kind of a "Heartbeat" or "Pulse of the Earth" (www.nuna2007.ca; www.largeigneousprovinces.org).