全吉山勘查区属于柴北缘含煤区，位于柴北缘含煤区中部，其中包含大煤沟、西大滩、航亚以及周边勘探区，是柴北缘重点矿区之一。利用现有资料开展该区岩相古地理特征与聚煤规律研究对指导煤炭资源勘查、提高勘查工程的地质效果，具有重要的理论意义和实际意义。 本文以青海省全吉山勘查区现有的地质勘探资料和前人研究成果为基础，总结分析了研究区侏罗系沉积体系和层序地层格架，重点分析了基于层序地层格架的岩相古地理及其演化特征，最后分析了研究区侏罗系聚煤规律及找煤方向研究。 全吉山勘查区受北西西向断层切割影响，整体呈北西西向条带状断块，断块区内受南北向断层切割影响，呈段块状单斜、向斜构造。含煤地层为侏罗系中统石门沟组、大煤沟组和侏罗系下统小煤沟组，区内共含G、F、D、C四个煤组。研究区为陆相沉积体系，主要沉积相有冲积扇、辫状河、辫状河三角洲、曲流河三角洲和湖泊沉积相。通过对研究区层序地层研究，可将区内侏罗系划分为7个三级层序（SⅢ1—SⅢ7），可识别出21个体系域。通过分析认为，其煤层主要发育在中侏罗世大煤沟组层序SⅢ3沉积期的辫状河冲积平原上，其次为中侏罗世石门沟组层序SⅢ4和层序SⅢ5沉积期扇三角洲和滨浅湖相带。其聚煤作用主要受控于古气候、基底沉降和沉积环境和基准面变化。从成煤环境角度分析，预测绿梁山北-绿草山-西大滩煤炭资源的有利勘探区，层序SⅢ3-层序SⅢ4为主要找煤层位。

Exploration area of Quanji mountain locates in the middle of the coal bearing arear of the Qaidam Basin, including Damei ditch, Xida ditch, Hangya and peripheral exploration area, which is the one of important areas in northern Qaidam Basin. To guide exploration of coal resource and improve geological effect of exploration engineering by studying on the sedimentary characteristics and coal accumulation of the area, has important theoretical and practical significance. The paper bases on the existing geological exploration data of the Quanji mountain exploration area of Qinghai province and the previous research results, and summarize and analyze Jurassic sedimentary system and the sequence stratigraphic framework of the study area, then emphatically analyzes the characteristics of lithofacies paleogeography and evolution based on the sequence stratigraphic framework, finally analyzes Jurassic coal accumulating pattern and orientation of coal exploration of study area. Quanji mountain area is influenced by a fault whose general strip block is NWW and the block is cut and influenced by SN faults performancing strip blocks and synclines. The coal-bearing strata contains Shimengou group （J2s），Dameigou group （J2d） which belong to middle Jurassic and Xiaomeigou group which belongs to Lower Jurassic, Containing G、F、D and C mine groups. The study area is characterized by continental sedimentary, mainly containing alluvial fan, braided river, braided river delta, meandering river delta and lacustrine deposits. Through the analyse of sequence stratigraphy, the Jurassic in the exploration area of the whole mountain is divided into three 7 order sequences（SⅢ1—SⅢ7）and 21 system domains. Through analysising, the Jishan area in the early and Middle Jurassic coal develops bearing strata in the alluvial fan, braided river, fan delta and lacustrine sedimentary system and coal bed is mainly formed S sequence SⅢ3 of Dameigou group in braided river alluvial plain sedimentary period in the Middle Jurassic. Secondly coal bed is formed sequence SIII4 of Shimengou group and sequences SⅢ5 sedimentary in the fan delta and shallow lake facies of the Middle Jurassic. The main controlling factors of coal accumulation in the study area are the changes of the paleo climate, the basement deposition, the sedimentary environment and the reference surface. From the perspective of coal forming environment. The north of LvliangMountain – Lvzao mountain – the west of Xidatan is predicted to the favorable exploration of coal resources whose loacation of coal seam is Sequence SIII3 and sequence SIII 4.