Geologic, geochemical, and geophysical consequences of plume involvement in the Emeishan flood-basalt province
Geologic, geochemical, and geophysical consequences of plume involvement in the Emeishan flood-basalt province
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DOI：
10.1130/g20602.1
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发表时间：
2004-10
期刊：
影响因子：
5.8
通讯作者：
Yigang Xu;B. He;Sun‐Lin Chung;M. Menzies;F. Frey
中科院分区：
文献类型：
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作者：
Yigang Xu;B. He;Sun‐Lin Chung;M. Menzies;F. Frey
峨眉山大火成岩省火山前岩石圈隆起的规模，中国西南部，使我们能够评估的空间和时间的古地理，地质，地球化学和地球物理的区域隆起的后果。系统的空间变化，观察整个穹状结构的碎屑岩和碳酸盐沉积物的分布和厚度，侵蚀的程度，厚度和火山岩的化学成分，以及壳幔结构。这些特征，最好用地幔柱来解释，可以用来追踪地质记录中较老的地幔柱位置。
Prevolcanic kilometer-scale lithospheric doming in the Emeishan large igneous province, southwest China, allows us to evaluate the spatial and temporal consequences of uplift on the paleogeography, geology, geochemistry, and geophysics of the region. Systematic spatial variations are observed across the domal structure in the distribution and thickness of clastic and carbonate sediments, the extent of erosion, thickness, and chemistry of volcanic rocks, and the crust-mantle structure. These features, which are best explained by a mantle plume, may be used to track older plume sites in the geologic record.