| 胡歆睿,何犇,唐佐其,谯常,胡荣.贵州息烽-修文地区早石炭世含铝岩系有利成矿相带研究[J].贵州地质,2025,42(2):142-157 |
| 贵州息烽-修文地区早石炭世含铝岩系有利成矿相带研究 |
| Research on Favorable Metallogenic Facies Belts of Early Carboniferous Aluminum-bearing Rock Series in |
| 投稿时间：2025-02-19 |
| DOI： |
| 中文关键词: 含铝岩系 古盐度 古气候 潮沟亚相 有利成矿相带 |
| 英文关键词:Aluminum-bearing rock series Ancient salinity Paleoclimate Subphase of tidal trough Favorable metallogenic facies belts |
| 基金项目:黔地矿科合〔2024〕8 号；黔地矿科合〔2024〕5号；黔地矿科合〔2024〕TD004 |
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| 中文摘要: |
| 为了查清息烽-修文地区石炭系含铝岩系九架炉组的古环境、古气候、古地理以及沉积相与含矿性的关系，笔者针对研究区石炭系九架炉组(C1jj)35个地表工程及钻孔进行系统采样，重点进行岩石学、沉积学和地球化学研究。通过对研究区石炭系含铝岩系九架炉组B含量、Sr/Ba、V/Zr、Sr/Cu和CIA值进行分析，认为研究区南部修文地区九架炉组以海相沉积为主，偶有淡水参与，且平面上整体表现为修文东部地区往修文西部地区水体古盐度逐渐增加；同时认为研究区九架炉组沉积时期为炎热、潮湿气候，并且修文西部地区往修文东部地区为湿润气候向干燥气候过渡。同时对研究区内石炭系九架炉组(C1jj)的沉积相进行重新划分，共划分出2个沉积相(冲洪积相、潮坪相)，4个沉积亚相(洪控溶洼、潮上-潮间带、潮下带、潮沟)。其中，潮沟亚相九架炉组整体沉积厚度较大，岩性以鲕豆状、碎屑状(砂砾屑)粘土岩为主，潮上-潮间带和潮下带的九架炉组整体沉积厚度较小。同时，满足铝土矿边界品位和最低工业品位的岩性主要为碎屑状(砂砾屑为主)铝土矿和碎屑状(鲕粒为主)铝土矿，主要见于潮沟亚相，因此，潮沟亚相为研究区有利成矿相带。 |
| 英文摘要: |
| In order to clarify the paleoenvironment，paleoclimatology，paleogeography，as well as the relationship between sedimentary facies and ore-bearing properties of the carboniferous aluminothermic Jiujialu formation in the Xifeng-Xiuwen area，in this paper，it conducted systematic sampling of 35 surface engineering and boreholes of the carboniferous Jiujialu Formation(C1jj)in the study area，with a focus on petrological，sedimentological and geochemical studiesThrough the analysis of the B content，Sr/Ba，V/Zr，Sr/Cu and CIA values of the carboniferous aluminum-containing rock system Jiujialu formation in the study area，it is believed that the Jiujialu formation in the Xiuwen area in the south of the study area is mainly Marine sedimentation，with occasional freshwater participation，and the overall phenomenon on the plane is that the ancient salinity of the water body gradually increases from the eastern Xiuwen area to the western Xiuwen areaAt the same time，it is believed that the sedimentary period of the Jiujialu formation in the study area was a hot and humid climate，and the transition from a humid climate to a dry climate was observed from the western part of Xiuwen to the eastern part of XiuwenMeanwhile，the sedimentary facies of the Carboniferous Jiujialu Formation(C1jj)in the study area were re-divided，and a total of 2 sedimentary facies(alluvial alluvial facies and tidal flat facies)and 4 sedimentary subfacies(flood control dissolved depression，supertidal-intertidal zone，subtidal zone，and tidal trough)were delineatedAmong them，the overall sedimentary thickness of the subfacies Jiujialu formation in the tidal valley is relatively large，and the lithology is mainly oolitic bean-like and clastic(gravel chips)clay rocksThe overall sedimentary thickness of the Jiujialu formation in the supertidal-intertidal zone and the subtidal zone is relatively smallMeanwhile，the lithology that meets the boundary grade and the minimum industrial grade of bauxite is mainly clastic(dominated by gravel debris)bauxite and clastic(dominated by oolitic grains)bauxite，which are mainly found in the tidal groove subfaciesTherefore，the tidal groove subfacies is a favorable metallogenic facies belt in the study area |
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