Prediction of Coal Seam Methane Enriched Areas Using Seismic Data

All coal mine disasters are dynamic geological phenomenon and affected by many factors. However, locating the enriched areas of CSM (coal seam methane) may be the precondition for the successful prediction of such disasters. Traditional methods of investigating CSM enriched areas use limited data and only consider a few important factors. Their success rate is low and cannot meet practical needs. In this paper, an alternative method is proposed. The proce- dure is given as follows: 1) fracture attributes derived from azimuth variations of P-wave data in coal seams and wall rocks can be extracted; 2) AVO attributes, such as the intercept P and gradient G parameters can be extracted from different azimuths from 3D seismic data; 3) seismic cubes can be inverted and the relative attributes of imped- ance cubes can be extracted; 4) using a GIS platform, multi-source information can be obtained and analyzed; these include fracture attributes of coal seams and wall rocks, the thickness of coal seams, the distribution of faults and structures, the depth of coal seams, the inclination and exposure of coal seams and the coal rank. Through this processing procedure, methane enriched areas can be systematically detected.

Effect of Soil Selenium on Nutritional Quality of Vegetables in the Selenium-enriched Areas of Qinghai Plateau

In order to improve the added value of the main vegetable products in Qinghai Province,we researched the effect of soil selenium content on vegetable quality in selenium-enriched area of Qinghai. Through the analysis of Qinghai selenium-enriched soil selenium content and5 kinds of main vegetables corresponds to the total selenium,part of the mineral elements and soluble sugar and VC content,the effects of soil selenium levels on selenium absorption and nourishment quality of vegetables were researched. The results showed that he Qinghai selenium-enriched soil selenium content in the range of 100. 00-563. 00 μg/kg,among them,the soil samples with sufficient selenium and rich selenium accounted for 76. 53% and 18. 88%,respectively. Soil selenium content of garlic sampling area was relatively high,and soil selenium content of sugar beet sampling area was relatively low. Vegetable selenium content was in the range of 11. 00-340. 94 μg/kg,the average content of total selenium content of garlic was up to 170. 40 μg/kg,and the average content of the total selenium content of radish is 73. 00 μg/kg.90. 63% of the vegetables in the region reached the level of sufficient selenium,and 70. 31% reached the level of selenium enrichment. The average content of Ca and Mg was higher than the national average. There was no significant correlation between selenium content of soil and vegetable and nutritional quality.

Rare earth elements-rich phase and enriching mechanism in sediments from CC area, the Pacific Ocean

Compared to North American shale composition (NASC), REE contents of sediments from the CC area in the Pacific Ocean are obviously high except that cerium has equal content to that of NASC. Three-valence rare earth elements were completely enriched in phosphate-phase and cerium in iron-phase. Rare earth elements in the sediments were originally derived from seawater. During lithi- genic and minerogenic processes of metalliferous nodules, three-valence rare earth elements in sediments mobilized and incorporated into sediments as authigenous biogenic-apatite, while cerium had change from Ce3+ to Ce4+ and directly precipitated from seawater and entered metalliferous nodules and caused Ce anomalies in REE pattern in sediments.

Characteristics of PM_(2.5) in rural areas of southern Jiangsu Province, China

To understand pollution level and possible sources of atmospheric fine particulates in rural areas of southern Jiangsu Province of China, samples of PM2.5 were collected and analyzed in Xueyan Town and Taihu Lake Station over three seasons from July 2002 to January 2003. The mass concentrations of PM2.5 and 14 principal component elements were obtained. The results showed that pollution of PM2.5 was serious and the concentration levels of S, Zn, Pb and As were similar to city. There are different seasonal distribution laws of pollutant elements in PM2.5 between two sampling sites, probably due to contribution of local sources, medium or long distance transportation of fine particulates and complicated meteorological conditions. The enrichment levels of S, Zn, Pb, As, K were high, reflecting the influence of anthropogenic activities. Particularly enrichment level of S was much higher in summer, which was probably related to meteorological condition. The result of principal components analysis showed major sources of PM2.5 included crustal resuspension, coal burning, metal processing industry or waste incineration, vehicular emission, which suggests anthropogenic activities is of important influence on PM2.5 in rural areas of southern Jiangsu Province.

Origin, hydrocarbon accumulation and oil-gas enrichment of fault-karst carbonate reservoirs: A case study of Ordovician carbonate reservoirs in South Tahe area of Halahatang oilfield, Tarim Basin

Based on comprehensive analysis of tectonic and fault evolution, core, well logging, seismic, drilling, and production data, the reservoir space characteristic, distribution, origin of fault-karst carbonate reservoir in Yueman block of South Tahe area, Halahatang oilfield, Tarim Basin, were studied systematically. And the regular pattern of hydrocarbon accumulation and enrichment was analyzed systematically based on development practice of the reservoirs. The results show that fault-karst carbonate reservoirs are distributed in the form of "body by body" discontinuously, heterogeneously and irregularly, which are controlled by the development of faults. Three formation models of fault-karst carbonate reservoirs, namely, the models controlled by the main deep-large fault, the secondary fault and the secondary internal fault, are built. The hydrocarbon accumulation and enrichment of fault-karst carbonate reservoirs is controlled by the spatiotemporal matching relation between hydrocarbon generation period and fault activity, and the size and segmentation of fault. The study results can effectively guide the well deployment and help the efficient development of fault-karst carbonate reservoirs of South Tahe area, Halahatang oilfield.

Experimental Simulation Study of the Dominant Enrichment Area of Terrestrial Organic Matter in the Shallow-Delta Sedimentary System of the Yacheng Formation in the Qiongdongnan Basin

Shallow-delta sedimentary systems receive both terrestrial and marine organic matter. As oil and gas exploration activities determine that the source rocks of the deep-water area of the Qiongdongnan Basin, northern South China Sea, are generally rich in and even dominated by terrestrial organic matter, this has led many researchers to examine the rules governing terrestrial organic matter enrichment in shallow-delta sea sedimentary systems. However, the deep burial of source rocks in deep-water areas and the relatively small amount of drilling undertaken have greatly restricted the study of these rules. In this study, the ‘forward modeling' research method was used to observe and analyze the deposition and preservation of terrestrial organic matter through flume experiments, where the depositional results were carefully depicted and sampled. The total organic carbon content of selected samples was measured and when combined with qualitative observations and quantitative comparison results, the dominant enrichment areas of terrestrial organic matter were identified. The experimental results show that the overbank parts of the delta front, the dune countercurrent surface, the low-lying parts, the delta front slope area and the shallow-prodelta sea area are where terrestrial organic matter is predominantly enriched. This provides an important basis and guidance for the prediction of the development areas of marine source rocks with terrestrial input in the deep-water areas of the Qiongdongnan Basin.

The enrichment characteristics and geological controlling factors of coalbed methane occurrence in Laochang area, Yunnan Province

The enriched characters of methane content in the main coal seam of Yunnan＇s Laochang coal mine was analyzed through combined with the geologic conditions of the research area： structure type, hydrogeology condition, coal reservoir＇s macerals, ash, water content, and so on. The geology factors of controlling gas in Laochang coal mine were illustrated; and the different geology models of controlling gas of geologic condition coupling were posed. Research shows that, in the region, the methane contents of the main coal seams decrease gradually from middle to all around it; the northeast and southeast is higher than the west. In the local area, the methane content of anticline axis is higher, and the gas content is reduced to both wings and plunging crown. On macroscopic view, the distribution of methane content in coal-beds was controlled by structural type. On microscopic view, the methane content in coal-beds is mainly involved in coal reservoir＇s macerals, ash content, and water content. The enriched characters of CBM in the research area are mainly the result of structure-hydrogeology-petrophysics coupling controls of CBM. On the basis of above analysis, according to the distribution character of methane content in coalbeds, the research area was divided into low gas area, middle gas area, and high gas area.

贵州普克金矿区黄铁矿和方解石地球化学特征及地质意义

贵州普克金矿区位于我国著名的滇-黔-桂“金三角”地区泥堡大型金矿西南方向的外围区域,与泥堡金矿处于相同的大地构造环境,地层特征、构造样式基本相同,成矿地质条件良好,对其开展成矿流体性质和物质来源研究,有助于理解普克矿区金的成矿作用,并为下一步找矿勘探提供新的参考。本文在对普克金矿区地表发育的(褐铁矿化)黄铁矿-方解石脉进行野外地质调查的基础上,开展矿物学、方解石稀土元素以及黄铁矿电子探针与微区原位LA-ICP-MS分析,结果显示普克金矿区内大部分方解石脉显示出与泥堡金矿床不含矿方解石脉相似的稀土元素配分特征,少数方解石样品显示出与黔西南卡林型金矿成矿期方解石稀土元素一样的中稀土元素富集和Eu正异常特征。该类方解石脉中的黄铁矿Au元素含量高出平均地壳丰度及沉积成因黄铁矿中Au的含量几个数量级,且Au在黄铁矿中以Au+离子形式存在,表明这些黄铁矿形成于金成矿期的热液环境。含金方解石出现中稀土元素富集模式和Eu正异常特征,表明金成矿流体系还原性质。由于地壳抬升剥蚀的影响,普克金矿区内中稀土元素富集、Eu正异常的方解石脉在地表的露头较少,也可能与普克金矿有利成矿地层层位(二叠系峨眉山玄武岩组)埋深较大、能运移到现今地表层位(三叠系永宁镇组)的成矿热液相对较少有关,指示深部有较好的金成矿潜力。

中国东西部陆相页岩油地质特征差异性分析及其对富集规律影响——以胜利探区为例

以胜利探区为例,系统对比研究了中国东西部陆相湖盆页岩油地质特征差异性及其对富集规律的影响。济阳坳陷沙四段上亚段—沙三段下亚段在古地貌、古气候、古水体介质等因素共同控制下,富有机质纹层状碳酸盐页岩大规模分布,富有机质黏土纹层成烃与富碳酸盐纹层成储协同演化为游离烃规模富集提供了有利条件。准噶尔盆地西北缘哈山地区风城组强裂陷作用导致强烈火山活动,在火山喷发物质与古气候共同影响下,富有机质纹层状含碱长英页岩相大规模分布,且成烃成储演化过程中形成较多的长英质矿物,并伴生大量的基质溶蚀孔和晶间孔,为页岩油富集奠定了重要基础。哈山地区在多期逆冲推覆过程中,准原地系统持续生烃、油多气少和相对较好的保存条件以及构造覆压、生烃增压作用产生的异常高压为页岩油高产提供了必要条件。准噶尔盆地东南缘(准东南)芦草沟组在海迹湖咸水环境下,受火山凝灰质与微生物作用影响,形成了富有机质纹层状页岩相夹贫有机质层状白云岩相的主要岩相组合类型。博格达山周缘山前构造带芦草沟组富有机质页岩均进入成熟演化阶段,胜利探区构造相对稳定区具备页岩油勘探前景。

川东红星地区二叠系茅口组页岩气勘探突破及富集主控因素

四川盆地二叠系页岩气具有良好的成藏条件和勘探潜力,继二叠系吴家坪组获得勘探突破后,将低勘探程度层系——茅口组“高灰”页岩气作为重要的勘探接替方向。利用HYM-1等井的岩心、测录井和分析化验资料,系统开展茅口组页岩气藏条件与富集特征的研究,认为茅口组四段一亚段页岩具有高碳、高灰、高孔隙度、高含气性、高杨氏模量、薄储层、多夹层的“五高一薄一多”的典型地质特征;与五峰组—龙马溪组等页岩相比,茅四段页岩碳酸盐矿物含量更高、黏土矿物含量更低,储集空间类型以有机质孔为主,无机孔较少,孔隙度平均4.27%,整体表现为高孔隙度;茅四段一亚段平均含气量为4.96m^(3)/t,具备较高的含气量。综合分析认为,富藻高碳页岩的发育、良好的储集能力和保存条件,以及页岩储层的可压裂性,是茅四段页岩气富集高产的主控因素。

煤层气富集区遥感勘查研究进展与展望

煤层气是一种自生自储式非常规清洁能源,它赋存于煤层及其围岩中。传统勘查方法费时费力,而遥感技术提供了煤层气富集区快速勘查的新途径。煤层气富集区遥感勘查的基本原理是基于典型地物波谱特征与富集区烃微渗漏导致的地表物体异常波谱特征,包括岩矿蚀变、植被异常和热异常等波谱特征的对比,结合煤田地质、地震、大地电磁等物探方法获取的数据,进行多源信息提取与综合分析,逐步查明煤层气富集区分布范围与含气特性。文章综述了煤层气富集区烃类物质渗漏与地表岩矿波谱和植被波谱异常的响应机制,以及基于地表岩矿波谱与植被波谱参数反演的多种方法与地物波谱异常反演在煤层气潜在富集区的勘查应用;阐述了含煤层气地层导致地表热异常的不同解释与提高地表温度反演准确率的主要方法与应用。未来,遥感与煤田地质数据、地震探测和大地电磁探测相结合,开展立体多元信息分析与信息提取,将成为实现煤层气富集区低成本快速勘查的主要途径。

渤海湾盆地东濮凹陷天然气成因及分布特征

针对东濮凹陷高热演化程度区天然气成因复杂,天然气富集规律及勘探潜力认识不清等问题,文中利用聚类分析、生烃模拟实验等手段,对天然气成因类型及分布特征进行了研究。研究结果表明:东濮凹陷存在油型气、煤成气及混合气3大类天然气。其中:油型气包括低熟油型气(Ro介于0.5%~1.2%)、中熟油型气(Ro介于1.2%~1.6%)和高熟油型气(Ro介于1.6%~2.0%),依次分布于构造顶部、斜坡带、洼陷带;煤成气Ro介于2.0%~3.0%,包括源外高熟煤成气和源内高熟煤成气;而混合气主要分布在高热演化烃源灶的大断裂周围。通过对主力生气区分析发现,油型气和煤成气对应的烃源岩主力生气深度分别介于4000~5000,5000~7000 m,空间上具有接力特征。东濮凹陷天然气富集程度与生烃洼陷的热演化程度关系密切,中、高热演化洼陷(Ro介于1.0%~3.0%)将是渤海湾盆地和东濮凹陷未来天然气勘探的重点领域。

太阳能富集区零碳建筑研究的基础科学问题

建筑领域尽快实施推广零碳建筑,对实现我国碳中和目标具有重要的现实意义。“太阳能富集区”是指《太阳能资源评估方法》(GB/T 37526-2019)中划定的我国单位面积年水平面总辐照量≥6300 MJ的太阳能资源最丰富区,主要分布在我国青藏高原地区,有着极其特殊的地域特征:冬季寒冷,建筑采暖周期长,运行碳排放高;辐射强烈,气温年较差和日较差大,建筑设备系统运行稳定性差、效率低;常规能源稀缺,但辐射资源丰富且地域广阔,降低了规模化利用太阳能的成本,具备率先实现区域性建筑碳中和目标的禀赋条件。在国家和建筑行业双碳战略目标任务的整体布局下,获得了“十四五”国家重点研发计划项目“太阳能富集区零碳建筑关键技术研究与示范”的支持,该项目探索完全以太阳能为驱动能源,即能源端脱碳体系下,结合该区域的建筑特征与社会经济发展水平,研究适配的零碳建筑技术路径、设计方法及其技术支撑体系,争取实现区域零碳建筑先行示范。本文旨在提出太阳能富集区零碳建筑研究基础科学问题的若干建议,为关键技术研发和工程示范提供理论基础。

松辽盆地古龙页岩油富集规律及有利区分布

近年的勘探开发实践已经证实松辽盆地白垩系发育的页岩油资源潜力巨大,但页岩油富集规律不清、有利区分布不明的问题制约了古龙页岩油勘探开发的快速推进。基于古龙全区多口井的取心及全面实验分析,系统开展页岩油含油性、储集性以及动用条件分析,明确页岩油富集分布规律,建立有利区划分标准,系统评价了松辽盆地齐家−古龙凹陷页岩油有利区。结果表明:沉积背景控制了页岩矿物组分及薄夹层岩性纵向上的规律性;明确了烃源岩丰度及热演化程度控“油”,有机质生烃演化及成岩演化控“储”,核磁可动孔隙度和脆性矿物含量控“动用”的富集可动主控要素。古龙页岩油纵向上在下部的Q_(1)—Q_(4)油层以纯页岩为主,含油性最好,但黏土矿物含量最高,工程品质较差,一类有利区主要分布在齐家-古龙凹陷北部及南部的部分区域,二类有利区基本覆盖齐家-古龙凹陷,分布面积最大;中部的Q_(5)—Q_(7)油层为页岩夹薄层白云岩,含油性中等,工程品质中等,核磁可动孔隙度最低,一类有利区部分发育于齐家−古龙凹陷北部,面积最小,二类有利区分布与R_(o)>1.2%范围相近,面积小于Q_(1)—Q_(4)油层;Q_(8)—Q_(9)油层岩性为页岩夹薄层粉砂岩,含油性较好,黏土矿物含量相对最低,工程品质最好,核磁可动孔隙度最大,可动条件最好,一类有利区分布面积最大,R_(o)>1.2%范围内基本均有分布,二类有利区分布与Q_(8)—Q_(9)油层相似。研究成果可为古龙页岩油的下一步勘探开发提供理论指导。

四川盆地复兴地区侏罗系纹层型页岩油气富集主控因素

四川盆地复兴地区侏罗系发育多套富有机质页岩,多口井试获高产工业油气流。明确不同页岩岩相沉积储层特征及富集主控因素对勘探部署具有重要意义。基于岩心精细描述、实验分析及钻井勘探实践,开展了陆相地层细粒沉积岩岩相划分与对比、储层精细表征、油气藏类型及富集高产主控因素解剖,形成了以下几点认识:(1)复兴地区侏罗系发育自流井组东岳庙段一亚段、凉高山组二段下亚段两套半深湖相优质页岩,具有多层叠置、中等有机碳含量、纹层发育、源储一体及高气油比特征;两套目的层页岩岩性复杂,为此,建立了基于“颜色—有机碳含量—沉积结构—矿物成分”四元岩相划分方案,明确了灰黑色高碳粉砂纹层型黏土页岩为凉二段下亚段有利岩相,灰黑色高碳介屑纹层、粉砂介屑纹层型黏土页岩为东一亚段有利岩相,3种有利岩相在研究区横向分布稳定。(2)灰黑色高碳粉砂纹层、介屑纹层、粉砂介屑纹层型黏土页岩具有“多孔共生、大孔大喉、孔缝一体”的储集特征,储集物性好、渗透率高,利于页岩油气在孔—缝储集体系中高效储集流动。(3)东一亚段为凝析气藏,凉二段下亚段为挥发性油藏。(4)明确了陆相页岩油气富集主控因素:中高生烃潜力、强滞留率为纹层型页岩油气富集提供物质基础;良好的成烃—成岩—成储—成藏配置关系利于油气聚集成藏;微裂缝发育及合适的热演化程度利于烃类富集及流动;大型宽缓向斜及高压—超压条件利于烃类持续保存。

北羌塘胜利河地区布曲组优质烃源岩形成环境与有机质富集机制

羌塘盆地是我国陆上新区油气勘探程度最低的中生代海相含油气沉积盆地,其主力烃源岩一直认识不清。本文以胜利河地区中侏罗统布曲组烃源岩为研究对象,开展了有机地球化学和元素地球化学的系统研究,探讨了布曲组烃源岩的形成环境和有机质富集机制,为预测北羌塘坳陷中侏罗统布曲组优质烃源岩的分布提供了理论依据。胜利河地区布曲组烃源岩有机质丰度高,有机质类型为Ⅱ型,处于成熟阶段,综合评价为优质烃源岩。布曲组沉积时期,气候干旱炎热,研究区初级生产力水平较高,属于弱局限盆地,具有浅水、高盐度、贫氧—缺氧的沉积环境。布曲组沉积时期,羌塘盆地发生大规模海侵,研究区邻近中央隆起,陆源输入和热液活动携带大量营养物质磷、铁等进入海洋,导致较高的初级生产力,是北羌塘坳陷布曲组优质烃源岩有机质富集的主控因素。研究区位于北羌塘坳陷的最小含氧带区域,有利于大量浮游生物在此缺氧死亡埋藏保存。通过有机质富集机制的分析,北羌塘坳陷的近岸陆棚斜坡带可能是中侏罗统布曲组优质烃源岩分布的有利区域。

川东北元坝地区侏罗系陆相页岩天然裂缝发育特征及其对页岩油气富集和保存的影响

川东北元坝地区陆相页岩中天然裂缝发育,是影响页岩油气富集和保存的关键因素。本文依据岩心、镜下薄片和扫描电镜等资料研究该区侏罗系大安寨段和千佛崖组页岩层系天然裂缝的发育分布特征,探讨裂缝对页岩油气富集和保存的影响。结果表明,侏罗系页岩中主要发育构造裂缝、层理缝、穿层水力破裂缝和收缩缝,其中构造裂缝包括穿层剪切缝、顺层剪切缝和层内张开缝,层理缝是页岩中最为发育的天然裂缝,线密度介于66~357条/m之间,平均为188条/m。层理缝和收缩缝既是页岩油气的储集空间也是运移通道,改善了页岩的储集性能,有利于页岩油气的富集。构造裂缝、穿层水力破裂缝与层理缝相互连通形成的宏观裂缝网络是页岩油气排放的通道,对大安寨段页岩气的逸散影响较大,对千佛崖组页岩油的保存条件影响较小。研究成果可为四川盆地陆相页岩油气勘探开发提供基础性参考依据。

鄂尔多斯盆地府谷地区深部煤层气富集成藏规律及有利区评价

鄂尔多斯盆地东缘神府区块是典型深部煤层气田,资源丰富且勘探开发潜力巨大。2023年10月,神府深部煤层大气田成功申报探明地质储量超1100亿m^(3)。府谷地区位于神府区块中部,是最早深部煤层气生产试验区,但目前对其煤层气的富集成藏规律和勘探开发潜力的认识尚不清楚。综合应用地震、测井、钻井和煤岩测试等资料以查明该地区深部煤层气地质特征、富集成藏规律和有利区分布。结果表明:主力煤层4+5、8+9号煤发育稳定且厚度较大(4+5号煤:3.2~5.8 m;8+9号煤:8.7~13.5 m),有利层段主要分布在煤层中上部位置;宏观煤岩类型主要为光亮-半亮煤,煤体结构主要为原生-碎裂结构煤;受深成变质作用的影响,煤类以气煤、肥煤和焦煤为主,煤的变质程度处于热解生气的高峰期,煤储层表现出中-高含气量(4+5号煤:3.0~12.0 m^(3)/t;8+9号煤:7.5~18.5 m^(3)/t)和中-高含气饱和度(35.0%~115.0%)等特征;主力煤层属于低渗储层((0.01~0.09)×10^(-3)μm^(2)),孔隙结构主要以微孔和小孔为主。提出府谷地区煤层气为“挠褶-断层-水动力”富集成藏模式,煤层气富集区位于构造平缓区和斜坡带。建立深部煤层气地质-工程双甜点评价体系,识别出I类地质-工程甜点区位于东部和西南部,是研究区深部煤层气勘探开发首选区带。因此,该研究认识进一步丰富了深部煤层气富集成藏理论,对鄂东缘深部煤层气勘探开发实践具有重要指导意义。

普光地区下三叠统富锂钾卤水成因与分布规律

通过对普光地区钻孔卤水和油田水水化学分析测试,开展离子比例研究,明确嘉陵江组和飞仙关组各亚段卤水的成因机制和分布规律。研究结果表明:嘉陵江组卤水K^(+)质量浓度在4060.00~20160.00 mg/L,Li^(+)质量浓度在26.00~271.00 mg/L,整体为海水浓缩特征。嘉四段—嘉五段卤水K^(+)质量浓度在4110.00~20160.00 mg/L,Li^(+)质量浓度在76.15~271.00 mg/L,Li^(+),K^(+)富集受海水蒸发浓缩、“绿豆岩”风化作用和淋滤作用主控;嘉二段卤水K^(+)质量浓度在4060.00~4140.00 mg/L,Li^(+)质量浓度在26.00~27.80 mg/L,受海水蒸发浓缩及膏盐溶解主控。飞仙关组卤水K^(+)质量浓度在6.13~650.00 mg/L,Li^(+)质量浓度在0.02~50.60 mg/L,整体为地下溶滤特征。飞三段—飞四段卤水K^(+)质量浓度在588.00~650.00 mg/L,Li^(+)质量浓度在40.40~50.60 mg/L,Li^(+),K^(+)富集受膏岩等围岩溶滤和嘉陵江组卤水运移主控;飞一段—飞二段卤水K^(+)质量浓度在6.13~478.00 mg/L,Li^(+)质量浓度在0.02~17.90 mg/L,由地层水对碳酸盐岩溶解主控。富锂钾卤水平面上主要分布在大湾-土主构造及其构造作用中等的翼部。

黔西北普底地区富锂黏土岩地球化学特征及成因

黔西北普底地区二叠系梁山组直接不整合于寒武系娄山关组之上,梁山组黏土岩中有锂的超常富集现象,研究其富集机制可为黏土岩中锂资源开发与评价提供更为丰富的信息。采用激光剥蚀电感耦合等离子质谱仪(LA-ICP-MS)分析、LA-ICP-MS面扫分析、矿物自动定量分析系统(AMICS)、X衍射和扫描电镜等手段,结合U-Pb年代学研究,对黏土岩中富集的锂开展元素地球化学、物质来源及赋存状态研究。研究结果表明:富锂黏土岩产于中二叠统梁山组中下部,锂矿化体产状受下伏基底娄山关组白云岩岩溶不整合面控制。富锂黏土岩中Li, Ga, V,Nb, Zr和F等元素相对富集,Ba和Sr等元素相对贫化。富锂黏土岩富集轻稀土元素,轻稀土元素以La、Ce和Nd为主,重稀土元素以Y为主。富锂黏土岩以淡水陆相沉积为主,具有陆相、海陆过渡相和海相多相沉积特征,沉积环境以氧化环境为主,形成于热带-亚热带温湿气候。富锂黏土岩锆石年龄谱约具有2.5 Ga、1.4 Ga、980 Ma、780 Ma和530 Ma 5个峰值,其中主要峰约为980、780和530 Ma。初步认为研究区梁山组富锂黏土岩具有多重物源,寒武系娄山关组不纯白云岩可能为主要物源,黏土岩中的Li主要赋存于高岭石中。