必须声明标量变量 "@Script_ID"。 鄂尔多斯盆地西南部洛河组储层特征和深部铀成矿地质条件-《地球科学与环境学报》
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[1]朱强,李建国*,苗培森,等.鄂尔多斯盆地西南部洛河组储层特征和深部铀成矿地质条件[J].地球科学与环境学报,2019,41(06):675-690.
 ZHU Qiang,LI Jian-guo*,MIAO Pei-sen,et al.Reservoir Characteristics of Luohe Formation and Metallogenic Geological Conditions of Deep Uranium in the Southwestern Margin of Ordos Basin, China[J].Journal of Earth Sciences and Environment,2019,41(06):675-690.
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《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

卷:
第41卷
期数:
2019年第06期
页码:
675-690
栏目:
基础地质与矿产地质
出版日期:
2019-11-15

文章信息/Info

Title:
Reservoir Characteristics of Luohe Formation and Metallogenic Geological Conditions of Deep Uranium in the Southwestern Margin of Ordos Basin, China
文章编号:
1672-6561(2019)06-0675-16
作者:
朱强123李建国123*苗培森123司庆红123赵华雷123 肖鹏123张博123陈印123赵博文13
(1. 中国地质调查局天津地质调查中心,天津 300170; 2. 中国地质调查局铀矿地质重点实验室,天津 300170; 3. 华北地质科技创新中心,天津 300170)
Author(s):
ZHU Qiang123 LI Jian-guo123* MIAO Pei-sen123 SI Qing-hong123 ZHAO Hua-lei123 XIAO Peng123 ZHANG Bo123 CHEN Yin123 ZHAO Bo-wen13
(1. Tianjin Center, China Geological Survey, Tianjin 300170, China; 2. Key Laboratory of Uranium Geology, China Geological Survey, Tianjin 300170, China; 3. North China Center for Geoscience Innovation, Tianjin 300170, China)
关键词:
砂岩型铀矿 洛河组 成矿地质条件 深部储层 赋存状态 控矿因素 鄂尔多斯盆地
Keywords:
sandstone-type uranium Luohe Formation metallogenic geological condition deep reservoir occurrence state ore-controlling factor Ordos Basin
分类号:
P619.14
DOI:
-
文献标志码:
A
摘要:
鄂尔多斯盆地是中国煤、油气、铀等资源的重要勘查基地,东北部、西部和东南部地区先后发现了数个超大型、大中型砂岩型铀矿床,西南部地区找矿标志和找矿方向则一直是该盆地铀资源勘查的难点。通过对鄂尔多斯盆地西南部镇原地区地质构造背景、地层结构、岩性岩相、水文地质、古气候等基本特征开展综合研究,认为研究区下白垩统洛河组具备有利于砂岩型铀成矿的地质条件,包括早白垩世以来适宜流体运移的构造背景,洛河组风成相砂岩厚度稳定、渗透性较好,泥-砂-泥或泥-砂-钙(钙质砂岩)/泥的地层结构,蚀源区和盆地盖层较高的U含量,连通的地下水补-径-排体系,干旱—半干旱为主的古气候条件,丰富的油气还原介质等。通过对铀矿物类型及赋存状态研究,提出研究区主要为沥青铀矿,部分为含钛铀矿物。铀矿物赋存状态与盆地东北部直罗组具有较大的差别,主要与针状磷灰石、长石、绿泥石、伊蒙混层、白云石、黄铁矿等伴生,与炭屑等还原介质没有直接的伴生关系。其中砂岩型铀矿与磷灰石伴生关系尤其重要。通过成矿条件的分析,指出断裂构造控制的油气上升部位可能是下一步的有利勘查区域。
Abstract:
Ordos Basin is an important exploration base for coal, oil and gas, uranium and other resources in China. Several large and medium-sized sandstone-type uranium deposits are discovered in the northeastern, western and southeastern margins, the prospecting breakthrough in southwestern margin is always difficult in uranium exploration. Through the comprehensive study on the characteristics of tectonic setting, stratigraphic structure, lithology and lithofacies, hydrogeology and paleoclimate in Zhenyuan area, the southwestern margin of Ordos Basin, it is concluded that the Lower Cretaceous Luohe Formation has the conditions for the formation of sandstone-type uranium deposit in study area, such as the tectonic setting is favorable for fluid migration since Early Cretaceous, the aeolian sandstones of Luohe Formation have stable thickness and good permeability, the structure is mud-sand-mud or mud-sand-calcium(calcareous sandstone)/mud, the U contents in source and caprock layers are high, the groundwater runoff system is connected, the climatic condition is arid-semiarid, the reduction media of oil and gas is abundant. By studying the types and occurrence states of uranium minerals, it is proposed that the main type is pitchblende, and a small part is titanium-containing uranium minerals. The occurrence states of uranium minerals are quite different from Zhiluo Formation in the northeastern margin of Ordos Basin, which are mainly associated with acicular apatite, feldspar, chlorite, illite/smectite formation, dolomite and pyrite, etc., but not directly associated with carbon debris and other reducing media. Among them, the discovery of the associated relationship between sandstone-type uranium deposits and apatite is particularly important. According to the analysis of metallogenic conditions, the rising position of oil and gas controlled by fault structure may be the favorable exploration direction for the next step.

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备注/Memo:
收稿日期:2019-07-10; 修回日期:2019-08-13投稿网址:http:∥jese.chd.edu.cn/
基金项目:国家重点研发计划项目(2018YFC0604200); 中国地质调查局地质调查项目(DD20190119); 国家重点基础研究发展计划(“九七三”计划)项目(2015CB453000); 国际地球科学计划项目(IGCP675)
作者简介:朱 强(1987-),男,山东泰安人,中国地质调查局天津地质调查中心工程师,E-mail:zhuq1987@163.com。
*通讯作者:李建国(1980-),男,福建松溪人,中国地质调查局天津地质调查中心高级工程师,工学博士,E-mail:jianguo_lee@126.com。
更新日期/Last Update: 2019-11-19