(Table 2) Representative major and trace element analyses of diabase dikes of ODP Hole 140-504B@en

Hole 504B is located in Panama Basin approximately 200 km south of the Costa Rica Rift within a tectonically undisturbed oceanic crust formed at the Costa Rica Rift spreading center. The hole was drilled in several Deep Sea Drilling Project (DSDP)/Ocean Drilling Program (ODP) legs, including ODP Leg 140. The 378.9 m of core drilled at Hole 504B during Leg 140 continues the dike complex recovered previously during DSDP Leg 83. All the rocks drilled during Leg 140 are fragments of variably metamorphosed dikes composed of olivine-plagioclase-clinopyroxene-, olivine-plagioclase-, and olivine-plagioclase-clinopyroxene-spinel-bearing basalts. […]504B钻孔位于巴拿马盆地（Panama Basin），地处哥斯达黎加裂谷（Costa Rica Rift）以南约200公里处，赋存于哥斯达黎加裂谷扩张中心形成的构造未受扰动洋壳内。该钻孔曾在多个深海钻探计划（Deep Sea Drilling Project, DSDP）/大洋钻探计划（Ocean Drilling Program, ODP）航次中实施钻探作业，其中包含大洋钻探计划第140航次（ODP Leg 140）。在第140航次期间于504B钻孔获取的378.9米岩心，延续了深海钻探计划第83航次（DSDP Leg 83）此前所获取的岩墙群。第140航次所钻取的全部岩石，均为经历不同程度变质作用的岩墙碎片，其岩性包括含橄榄石-斜长石-单斜辉石、橄榄石-斜长石以及含橄榄石-斜长石-单斜辉石-尖晶石的玄武岩。[…]