CAJ | 학술논문

黑龙江东部二龙山盆地是一新生代陆相聚煤盆地，中新世富锦组是其含煤地层。通过对富锦组沉积相、层序地层和聚煤作用特征的研究，可以看出：富锦组主要由凝灰质粉砂岩及中细砂岩、凝灰质砾岩及褐煤组成，发育滨浅湖相、深-半深湖相、冲积扇扇根相、扇中相及沼泽相，分别属于湖泊沉积体系和冲积扇沉积体系；富锦组是一个以区域不整合面为上下界的三级层序，其低位体系域对应底部砾岩段，湖侵体系域对应下部砂岩段和中部含煤段，高位体系域对应上部砂岩段；研究区煤层形成于湖侵体系域末期，且以盆地中部煤层厚度最大，向西北和西南方向煤层均变薄；聚煤作用明显受基底沉降作用影响，在湖侵体系域末期基底稳定沉降阶段，可容空间增加速率与泥炭堆积速率相平衡，从而形成了区内巨厚煤层。
흑룡강동부이룡산분지시일신생대륙상취매분지，중신세부금조시기함매지층。통과대부금조침적상、층서지층화취매작용특정적연구，가이간출：부금조주요유응회질분사암급중세사암、응회질력암급갈매조성，발육빈천호상、심-반심호상、충적선선근상、선중상급소택상，분별속우호박침적체계화충적선침적체계；부금조시일개이구역불정합면위상하계적삼급층서，기저위체계역대응저부력암단，호침체계역대응하부사암단화중부함매단，고위체계역대응상부사암단；연구구매층형성우호침체계역말기，차이분지중부매층후도최대，향서북화서남방향매층균변박；취매작용명현수기저침강작용영향，재호침체계역말기기저은정침강계단，가용공간증가속솔여니탄퇴적속솔상평형，종이형성료구내거후매층。
Erlongshan basin in eastern Heilongjiang Province is a Cenozoic continental coal basin and Miocene Fujin Formation is its coal-bearing strata. In this paper, we have studied its sedimentary facies, sequence stratigraphy and coal accumulation characteristics. Fujin Formation is composed of tufaceous siltstone and fine-grained sandstones, tufaceous conglomerates, and lignite, was deposited in lacustrine environments ranging from littoral and shallow lake, deep lake, medium deep lake to alluvial fan. Two depositional systems were classified; lacustrine and alluvial fan; the whole Fujin Formation composes a third-order sequence with the regional unconformities as its upper and lower bounds. The lowstand system tract corresponds to the bottom conglomerate member, the transgressive systems tract corresponds to the lower sandstone member and middle coal-bearing member, and the highstand systems tract corresponds to the upper sandstone member. The coal seams in Fujin Formation were formed at the end of the transgressive systems tract, and the thickest coal is distributed in the central zone of the basin, which thins out towards northwest and southwest. Coal accumulation has been significantly controlled by basin subsidence, and during the stable subsiding of the basin of the late transgressive systems tract, the increase rate of accommodation space was well balanced with the rate of peat accumulation, thus forming a regional thick coal seam.