| 二龙山含煤盆地中新世富锦组沉积相及层序地层特征 |
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| 引用本文： | 野兆瑞, 曲延林, 邵龙义, 马立军, 胡一鸿, 李柱. 二龙山含煤盆地中新世富锦组沉积相及层序地层特征[J]. 煤田地质与勘探, 2014, 42(4): 1-7. DOI: 10.3969/j.issn.1001-1986.2014.04.001 |
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| 作者姓名： | 野兆瑞 曲延林 邵龙义 马立军 胡一鸿 李柱 |
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| 作者单位： | 中国矿业大学地球科学与测绘工程学院;黑龙江省煤田地质局; |
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| 基金项目： | 国家科技重大专项课题(2011ZX05033-002);国土资源大调查项目(1212011121043) |
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| 摘 要： | 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。
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| 关 键 词： | 二龙山盆地 新近纪 富锦组 湖侵体系域 聚煤作用 |
| 收稿时间： | 2013-04-01 |
Sedimentary facies and sequence stratigraphy of the Miocene Fujin Formation in Erlongshan coal-bearing basin |
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| YE Zhaorui, QU Yanlin, SHAO Longyi, MA Lijun, HU Yihong, LI Zhu. Sedimentary facies and sequence stratigraphy of the Miocene Fujin Formation in Erlongshan coal-bearing basin[J]. COAL GEOLOGY & EXPLORATION, 2014, 42(4): 1-7. DOI: 10.3969/j.issn.1001-1986.2014.04.001 |
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| Authors: | YE Zhaorui QU Yanlin SHAO Longyi MA Lijun HU Yihong LI Zhu |
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| Abstract: | 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. |
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| Keywords: | Erlongshan basin Neogene Fujin Formation transgressive systems tract coal accumulation |
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