该凹陷沉积的碎屑岩具有矿物成分成熟度低和结构成熟度低的特征，所以其埋藏成岩作用十分强烈。
The clastic rocks in this depression are characterized by low maturation of the mineral composition, and low maturation in structure, thus diagenesis due to burial is very strong.
火山碎屑堆积物中的浮岩岩石化学分析结果表明岩浆成分为粗面质。
Petrochemistry analysis of pumice component indicates that the magma can be assigned to trachytic magma.
碎屑物常量化学成分投点表明，其形成时构造背景属被动大陆边缘。
The data of chemical composition of sediments indicate that the tectonic background of the turbidites is passive continental margin environment.
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