| 刘奎勇,吴滔,王媛,易成兴,张厚松,安亚运,盘应娟.桂西北安然地区晚二叠世乐平统碳酸盐岩微相特征及古地理意义[J].贵州地质,2022,39(3):225-232 |
| 桂西北安然地区晚二叠世乐平统碳酸盐岩微相特征及古地理意义 |
| Microfacies Characteristics and Palaeogeographic Significance of Carbonate Rocks of the Lepingian Series of the Late Permian in Anran Area of the Northwestern Guangxi |
| 投稿时间：2021-07-22 |
| DOI： |
| 中文关键词: 桂西北天生桥镇-安然地区 吴家坪-长兴期微相特征 海退进积层序 沉积演化 古地理意义 |
| 英文关键词:Tianshengqiao-Anran area of northwest Guangxi Microfacies characteristics of wujiaping-Changxing period Regressive sequence Sedimentary evolution Palaeogeographic significance2022年39卷第3期(总第152期)贵州地质GUIZHOUGEOLOGYVol39No3(Tol152)2022 |
| 基金项目:《贵州1∶5万敬南幅、巴结幅、坡脚幅区域地质调查》项目，隶属于南盘江成矿区贞丰和富宁地区地质矿产调查，任务书编号:WT【2016】-177、WT【2017】-006)；《贵州省地质三维空间战略调查评价》项目，编号:GZMC-ZC20202204-1。 |
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| 中文摘要: |
| 通过野外剖面测制、室内岩石薄片观察、古生物鉴定，运用沉积学、矿物岩石学、层序地层学、构造地质学等的方法原理，对黔桂之交天生桥镇-安然地区晚二叠世乐平统吴家坪-长兴期碳酸盐岩微相特征进行分析鉴定，试图阐述沉积演化及古地理意义。分析表明，研究区未见长兴组及大隆组，合山组与吴家坪组均为孤立碳酸盐岩台地，且属同时异相关系。合山组发育局限台地、开阔台地、受簸选台地边缘砂、生物建造等4种沉积亚相，发育MF1-生屑粉微晶灰岩、生屑泥微晶含泥质灰岩，MF2-含泥质砂岩夹含粉砂质泥岩或煤层，MF3-泥晶介壳屑蜓屑灰岩或泥晶生屑灰岩，MF4-泥、微晶或亮晶生屑藻砂屑灰岩，MF5-生屑藻粘结灰岩等5种沉积微相；吴家坪组发育受簸选台地边缘砂、生物建造及前缘斜坡等3种沉积亚相，发育MFⅠ-泥微晶藻砂屑生屑灰岩、海绵礁生物灰岩，MFⅡ-亮晶藻砾屑生屑灰岩，MFⅢ-复成分灰岩角砾岩或礁前角砾岩等3种沉积微相。二叠世乐平统吴家坪-长兴期经历了4期相对连续完整的次级海进-海退旋回，总体为海退进积层序的古地理特征，并形成相应的沉积矿产资源。 |
| 英文摘要: |
| Based on section survey，thin section observation，paleontology identification，sedimentology，mineral Petrology，sequence stratigraphy，structural geology，etc.，it analysis the sedimentary evolution and palaeogeographic significance of the late Permian wujiaping-Changxing carbonate rocks in the Tianshengqiao-Anran area in the border area of Guizhou and Guangxi.The analysis shows that the Changxing formation and Dalong formation are not found in the study area.The Heshan formation and the Wujiaping formation are isolated carbonate platform and contemporaneous heterotopic facies，the former consists of four sedimentary subfacies and five sedimentary microfacies，the latter consists of three sedimentary subfacies and three sedimentary microfacies(MFⅠ-Ⅲ).The wujiaping-changxing period of the leping series of the Permian experienced 4 relatively continuous and complete sub-transgression-regression cycles，which were generally characterized by the evolution of regressive sedimentary sequences and the formation of corresponding sedimentary mineral resources. |
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