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1.
大量包裹体研究表明,五圩多金属矿田属中─低温热液成因,热液来自局部动热变质作用产生的变质热液和部分岩浆热液的混合。矿床分带性明显,并具多阶段矿化特征。空间上自矿化中心向外,时间上从早至晚,不仅包裹体特点有变化,而且温度、压力、含盐度、成分、氧逸度、CO2逸度等方面也有逐渐降低的变化规律。CO2包裹体大量出现和高比值CO2/H2O可作为直接的找矿标志。  相似文献   

2.
安家营子金矿床是华北地台内的一个中型矿床,产在燕山期的斑状花岗岩之中。通过对安家营子金矿床流体包裹体的研究,讨论了该矿床形成时的物理化学条件。成矿流体的温度、盐度(NaCl)分别为280~330℃和4.6%~10.6%。成矿流体的氧逸度为2.7×10 ̄(-31)~3.2×10 ̄(-31)pa,pH值为5.0~5.8。包裹体的化学分析表明,成矿流体为Na ̄+-K ̄+-Cl ̄-H_2体系。  相似文献   

3.
文章研究了361矿床热液地球化学特征,并进行了热力学模拟计算,认为矿床热液是大气降水与深源流体混合而成。深源流体是与基性岩脉同源的富含Na+,Cl-和CO2等挥发组分的流体,它沿深大断裂上升,对地壳表层的大气降水加热、混合。混合热液运移时把花岗岩中的活化铀浸出,并主要以[UO2(CO3)3]4-,[UO2(CO3)2·2H2O]2-和UO22+等形式迁移至断裂附近的破碎部位富集成矿。  相似文献   

4.
用重量法测定了CH2H4和CO2在Co-丝光沸石上的吸附等温线和吸附扩散动力学曲线,并对吸附平衡等温线和扩散曲线模拟计算,拟合很好,研究表明,在Co-丝光沸石上,C2H4的平衡吸附远大于CO2的;而C2H4的吸附扩散速率与CO2的接近,因此利用平衡吸附原理,用Co-丝光沸石可将C2H4-CO2中的CO2吸附下来,得到100%的C2H4。采用动态吸附法考察了吸附温度、流速、浸渍量以及活化温度对Co-丝光沸石吸附分离C2H4-CO2的影响规律,分析得出吸附剂的最佳操作条件,采用Co-丝光沸石来分离C2H4-CO2,分离因数大,选择吸附的量也较大,床层利用率高,脱附较易。  相似文献   

5.
在研究NaCl-Na2CO3-H2O和NaCl-NaHCO3-H2O三组分相图的基础上,提出了含盐天然碱矿采出液的加工分离方案。当Na2CO3含量超过盐碱总量的44.5%时,采用蒸发-碳化-分离-蒸发-分离的加工方案,当Na2CO3含量低于盐碱总量的44.5%时,采用蒸发-分离-碳化-分离的加工方案。运用这两种方案,Na2CO3的理论收率都比较高。  相似文献   

6.
从矿床地质、矿物组合和矿物包裹体等方面对九毛锡矿床的研究表明,成矿温度为160~405℃,压力约340~500bar,盐度为4.8~29.6wt%。成矿流体的同位素组成:氢同位素-43~-53‰、氧同位素2.94~7.53‰、总硫硫同位素-7.58~1.05‰,具岩浆水和混合硫源的特征。成矿流体沸腾作用是锡石沉淀和富矿石形成的重要机理。  相似文献   

7.
在矿床地质研究基础上,通过对石英、萤石、方解石中流体包裹体岩相学、显微测温分析,对甘肃省干沙鄂博稀土矿床成矿流体的特征、演化及成矿机理进行了讨论.结果表明:矿床中发育大量包裹体,按室温下的成分相态特征,将其分为熔体包裹体、流体-熔体包裹体、气液H2O包裹体、气液CO2包裹体、CO2-H2O包裹体和含子矿物的气液H2O包裹体、含子矿物的CO2-H2O包裹体等7种类型.在成矿过程中,包裹体组合从熔体包裹体→流体-熔体包裹体+流体包裹体→流体包裹体的变化,反映了成矿介质经历了从岩浆→岩浆+热液→热液的演化过程.在岩浆-热液成矿期,流体-熔体包裹体大量存在,以及富H2O相CO2-H2O包裹体与富cO2相CO2-H2O包裹体密切共生,表明成矿时曾经发生两次不混溶作用,早期岩浆-热液不混溶作用导致萤石和REE-氟碳酸盐的晶出,而CO2-H2O不混溶作用引起了硫化物的沉淀.  相似文献   

8.
聚氨酯水分散体合成用原材料选择   总被引:1,自引:1,他引:0  
通过考察树脂水分散性、耐水性及力学性能等方面的特征,讨论了聚氨酯水分散体合成时原材料的选择.研究表明,合成中使用的聚酯二醇分子量(Mn)大小、合成预聚体时原材料的-NCO与-OH物质的量之比值(-NCO/-OH)、树脂中羰基含量、预聚体中-NCO与扩链剂中-NH2物质的量之比值(-NCO/-NH2)、中和度对聚氨酯水分散体及胶膜性能具有很重要的影响.  相似文献   

9.
气相色谱分析表明,原生包裹体内存在着数种烃类诸如CH4,C2H4,C3H8,C3H6,C2H2,iC4,nC4,iC5,nC5和C6。轻烃的干湿比很高(0.972~0.998),具有煤型气的特征。流体包裹体常沿着愈合断裂与煤包裹体共生,由此推断成矿流体内的轻烃可能来自于煤而非石油。  相似文献   

10.
用乙酸、硫氰化铵与氨基酸反应,得到4个2-硫代乙内酰脲配体S=CNHC(O)CH(R)N↓H,它们分别与Co2(CO)8反应,合成出两类4个三核钴羰基硫簇合衍生物:Co3(CO)7(μ3-S)〔μ-η2-SC=NC(O)CH(R)N↓H(Ia,Ib)和Co3(CO)6(μ3-S)(μ-η2-SC=NC(O)CH(R)N↓H)(:CNHC(O)CH(R)N↓H)(Ⅱc,Ⅱd).对4个族合物进行了元素分析、IR谱、1HNMR和MS表征,并推测出它们的分子结构.  相似文献   

11.
Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.  相似文献   

12.
The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.  相似文献   

13.
王慧 《科技信息》2008,(10):240-240
Wuthering Heights, Emily Bronte's only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.  相似文献   

14.
The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3~4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰~ -7.8‰, PDB) and matrix dolomites (-6.6‰~ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084~0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078~0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.  相似文献   

15.
何延凌 《科技信息》2008,(4):258-258
Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women's language from these perspectives: pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women's language, more attention should be paid to language use in social context. What's more, the linguistic phenomena in a speaking community can be understood more thoroughly.  相似文献   

16.
Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.  相似文献   

17.
以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性.  相似文献   

18.
AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…  相似文献   

19.
理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。  相似文献   

20.
As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.  相似文献   

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