风化淋滤作用形成的储层沥青主要沿断层和不整合面分布。
The reservoir bitumen formed by weathering are usually distributed along a fault and a uncomformity.
酸性淋滤作用是风化壳剖面上REE富集分异的主要控制因素。
Acidic leaching is regarded as a major factor affecting REE enrichment and differentiation in the weathering profile.
淋滤作用主要改造爆发相凝灰质熔岩，使其变得极为疏松，孔隙度提高到15 %以上。
The eruptive tuffaceous volcanic has been mainly changed by leaching, and become loose and porous, with the porosity to be increased to over 15%.
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