Volcanic pyroclast analyses from DSDP Hole 13-123
收藏DataONE2024-07-23 更新2025-11-08 收录
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The pyroclastic deposit drilled at site 123 is a rhyodacitic material. Major and rare-earth element abundances in these volcanic rocks suggest that they are the result of a differentiation process by fractional crystallization from a calc-alkaline magma. The vertical variation of mineralogy and chemistry of this deposit is the result of three superposed stages of weathering. The first is aerial weathering, the second is the product of alkaline brines, and the third is a hydrothermal alteration. […]
创建时间：
2025-11-03
