SGER: Petrology and Sr, Nd and Pb Isotope Geochemistry of Volcanic Rocks from Mt. Mayon and Mt. Pinatubo, Philippines

同时发生的火山活动。马荣和Mt.位于菲律宾吕宋岛的皮纳图博提供了一个难得的机会来比较和对比菲律宾东部和西部火山弧的岩石学和地幔来源特征。Mt.Mt.马荣属于东弧，火山作用与菲律宾海板块吕宋之下的俯冲作用有关，具有较薄的远洋沉积盖层。皮纳图博属于西弧，火山作用是南中国海板块向东俯冲的结果，具有中等陆源沉积盖层。我们建议对山上的火山岩进行野外和实验室相结合的调查。皮纳图博和Mt.马荣。在现场，我们将绘制并尝试收集两座火山从最古老到最年轻的喷发产物的代表性样本。在实验室中，将对收集的样品进行岩石学、矿物学、主体常量元素和微量元素化学以及锶、钕和铅同位素组成的分析。这项拟议的调查是斯克里普斯海洋研究所、美国地质调查局和菲律宾火山与地震研究所的工作人员共同努力的结果。

The concurrent volcanic activities of Mt. Mayon and Mt. Pinatubo in the island of Luzon, Philippines, offer a rare opportunity to compare and contrast the petrology and mantle source signature of the East and West Philippine volcanic arcs. Mt. Mayon belongs to the East Arc wherein volcanism is associated with the subduction underneath Luzon of the Philippine Sea Plate with thin pelagic sediment cover whereas Mt. Pinatubo belongs to the West Arc wherein volcanism is the result of the eastward subduction of the South China Sea Plate with moderate terrigenous sediment cover. We propose a combined field and laboratory investigation of volcanic rocks from Mt. Pinatubo and Mt. Mayon. In the field, we will map and try to collect representative samples from the oldest to the youngest eruptive products of both volcanoes. In the lab, samples collected will be analyzed for their petrography, mineralogy, bulk major and trace element chemistry, and Sr, Nd, and Pb isotopic compositions. The proposed investigation is a collaborative effort among workers from the Scripps Institution of Oceanography, United State Geological Survey and Philippine Institute of Volcanology and Seismology.