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

同时火山活动的山。马荣山 菲律宾吕宋岛的皮纳图博岛提供了一种罕见的 有机会比较和对比岩石学和地幔 东、西菲律宾火山岩的震源特征 弧。 山马荣火山属于东弧， 与吕宋岛下的俯冲有关， 菲律宾海板块，具有薄的远洋沉积物覆盖层 而Mt.皮纳图博属于西弧， 火山作用是东俯冲的结果， 中等陆源沉积的南海板块 掩护 我们建议把野外和实验室结合起来 火山岩研究皮纳图博山 马荣 在实地，我们将绘制地图， 从最老到最年轻的代表性样本 两座火山的喷发产物 在实验室里， 将对收集的样品进行岩相学分析， 矿物学、主体和微量元素化学以及Sr， Nd和Pb同位素组成。 拟议 调查是来自以下方面的工作人员的协作努力： 美国斯克里普斯海洋学研究所 地质调查局和菲律宾火山研究所 地震学

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.