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引用本文:鲁超,焦养泉,彭云彪,吴立群,苗爱生,荣辉,谢惠丽. 大营地区古层间氧化带识别与空间定位预测[J]. 中国地质, 2018, 45(6): 1228-1240.
LU Chao,JIAO Yangquan,PENG Yunbiao,WU Liqun,MIAO Aisheng,RONG Hui,XIE Huili. Paleo-interlayer oxidation zone identification and spatial localization prediction in Daying area[J]. Geology in China, 2018, 45(6): 1228-1240(in Chinese with English abstract).
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大营地区古层间氧化带识别与空间定位预测
鲁超1,2, 焦养泉1, 彭云彪1,2, 吴立群1, 苗爱生2, 荣辉1, 谢惠丽1
1.中国地质大学, 湖北 武汉 430074;2.核工业二〇八大队, 内蒙古 包头 014010
摘要:
潜在铀储层内部的层间氧化作用与铀成矿作用同时进行而且密不可分,(古)层间氧化带被认为是砂岩型铀矿的重要找矿标志。运用岩芯和钻孔资料以及各分带的岩石矿物学以及地球化学特征等信息识别古层间氧化带,结合铀储层中具有古氧化性质和还原性质的岩石地球化学标志,定量地给予古层间氧化带以空间定位,并据此可以划分出古完全氧化带、过渡带和还原带。在此基础上,探讨了铀储层规模、隔挡层、暗色泥岩及煤层等因素对于古层间氧化带分布的影响。
关键词:  鄂尔多斯盆地  古层间氧化带  二次还原  空间定位  识别标志
DOI:10.12029/gc20180612
分类号:P619.14;P588.2
基金项目:国家重点基础研究发展计划"973"项目"中国北方巨型砂岩铀成矿带陆相盆地沉积环境与大规模成矿作用"(2015CB453000)、鄂尔多斯盆地北缘含铀岩系三维地质编图项目(12120115013701)和鄂尔多斯盆地北部古层间氧化带特征分析及远景预测评价项目(核工业地质局)资助成果。
Paleo-interlayer oxidation zone identification and spatial localization prediction in Daying area
LU Chao1,2, JIAO Yangquan1, PENG Yunbiao1,2, WU Liqun1, MIAO Aisheng2, RONG Hui1, XIE Huili1
1.China University of Geosciences, Wuhan 430074, Hubei, China;2.No. 208 Geological Party, CNNC, Baotou 014010, Inner Mongolia, China
Abstract:
Interlayer oxidation in potential uranium reservoir is closely related to uranium mineralization. Paleo-interlayer oxidation zone is considered to be an important symbol in search for sandstone type uranium deposits. In this paper, core drilling data and mineralogy and geochemical characteristics of each sub-band of interlayer oxidation were used to identify the paleo-interlayer oxidation. Combined with paleo-oxidic and reductive properties of uranium geochemical markers in uranium reservoirs, paleointerlayer oxidation was spatial positioned quantitatively. Accordingly, paleo-completely-oxidized zone and transitional zone and reduction zone were divided and identified. On such a basis, the distribution of paleo-interlayer oxidation zone controlled by the scale of the uranium reservoir, barrier layers, the dark mudstone and coal seam and other factors was discussed.
Key words:  Ordos basin  paleo-interlayer oxidation zone  second reduction  spatial orientation  identification mark