| 朱华利,谯常,王波,张晗彬.黔南独山恒丰早石炭世沉积暴露面的发现及其地质意义[J].贵州地质,2017,34(3):150-155 |
| 黔南独山恒丰早石炭世沉积暴露面的发现及其地质意义 |
| Discovery and Its Geologic Significance of Sedimentary Free Face of Early Carboniferous in Hengfeng，Dushan，South Guizhou |
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| DOI： |
| 中文关键词: 黔南 石炭系 暴露面 赤铁矿 岩石地层 沉积相分析 |
| 英文关键词:South Guizhou Carboniferous system Exposure plane Hematite Rock layer Sedimentary facies analyses |
| 基金项目:中国地质调查局地质调查项目《贵州1∶5万独山等四幅区域地质调查（121201010000150011-03）； 2010年度贵州省地矿局局管重大科研项目之《贵州区域构造特征、构造演化与矿产空间分布关系研究》；贵州省地矿局青年地质科学研究项目《贵州松桃—江口地区寒武系炭质粘土岩地球化学特征研究》（黔地矿科合[2012-16号]）资助 |
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| 中文摘要: |
| 本文报道了黔南恒丰地区首次发现早石炭世沉积暴露面；基于野外地质调查实测剖面，对该剖面进行综合研究，包括岩石地层、沉积相分析及生物化石、全岩微量元素地球化学特征：Sr/Ba、B、 U/Th、V/Cr等进行研究。得出研究区早石炭世存在多期次沉积暴露，最后一次暴露的时间与区域上祥摆组至上司组沉积时间相当。早石炭世晚期研究区处于较为封闭的混合潮坪相沉积环境，直到最后一次暴露，海水完全退出，该区成为陆相沉积剥蚀区，导致研究区缺失祥摆组至上司组。剖面下部含鲕状赤铁矿层与“宁乡式”铁矿具相似的沉积环境，为研究区赤铁矿找矿提供了新的信息。 |
| 英文摘要: |
| In this paper，it reported the sedimentary free face of early Carboniferous was found the first time in Hengfeng area. Base on the tested section of field geologic investigation，it did the comprehensible study，include the lithostratigraphy，sedimentary facies analysis and whole rock trace elements geochemical characteristics（Sr/Ba，B，U/Th， V/Cr），it’s known that many times sediment exposure existed of Early Carboniferous in the target area，the time of last exposure is the same as the sediment time from Xinangbai formation to Shangshi formation in this area.The target area is be in a closed tidal-flat facies sediment environment in late Early Carboniferous，this area became continental sedimentary denuded zone until the sea water exited with the last exposure，so from Xiangbai formation to Shangshi formation lost in this area.The oolitic hematite bearing stratum under the section had similar sedimentary environment with ‘Ningxiang type’ iron deposit，it affords new information foe hematite exploration in the target area. |
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