One material source of diamond is primary diamond mines and ancient placer in the ancient Yi River upstream in Shandong, the other is the primary diamond mine which may exist in this area.
金刚石的物质来源一是古沂河上游山东的金刚石原生矿和古砂矿，二是本区的可能存在的金刚石原生矿。
This paper discusses material source, physic-chemical and geological conditions for ore formation and ore-prospecting indicators, providing a basis for geological prospecting in the area.
对研究区成矿物质来源、成矿物理化学条件、成矿地质条件以及找矿标志进行了研究和探讨。为该区的地质找矿提出了依据和方向。
Conditions that are correlated with accelerated deposition include drainage area, gully development, and texture of source material.
与加速沉积有关的条件包括流域面积，沟壑发育状况和土壤结构等。
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