陕西省煤种分布及其地质背景分析

陕西省煤炭资源丰富,含煤地层众多,煤种较为齐全,煤种地域分布严格受区域地质三分性区划控制,明显可分为秦巴山腐泥无烟煤区、渭北高变质烟煤区和陕北高原低变质烟煤区,煤变质程度由南向北依次递降,聚煤作用强度则随时间推移由南而北逐渐增强;层位分布与区域地质背景息息相关,明显受制于各地质单元的地质发展历史、地质结构特征和变质因素。

The distribution of coal sorts and analysis of its geologic background in Shaanxi province

The coal resources in Shaanxi province is abundant, and its coal-bearing strata is numerous and the coal sorts is complete. The areal distribution of coal sorts is strictly controlled by the areal geology. It can obviously be divided into the saprogenic coal area in the Qin Ba mountain, the high bituminous coal in Wei-bei area and the low bituminous coal area in North-Shaanxi Plateau. The metamorphic degree is gradually lowered from the south to north. The strength of the coalification is stronger with the time. The distribution of the geologic layer relates closely with the geologic background, the developing history of the geologic unit, the characteristic of the geologic structure and the metamorphic factor.