镁资源研究与开发述评之一──镁水泥的研究与盐湖的开发   总被引：1，自引：0，他引：1  

王臣松 《盐湖研究》1998,(Z1)

简单概括了镁资源研究开发的状况,评述镁水泥研究的主要理论成果。指出以镁水泥为途径开发盐湖资源的重要性。同时表述了镁水泥研究领域的最新动态,指出当前镁水泥研究需要考虑的几个重大问题。  相似文献   

市场经济体制执行地质勘探规范的有关问题讨论     

殷友东  刘振红 《化工矿产地质》1997,19(2):135-138

市场经济体制下地质勘探工作的资金投入一般要由开采单位负担,而这部分资金属于前期投入,需要贷款来解决,现行的地质勘探规范已难适应地质工作的需要。在有一定工作基础的中小型矿山地质勘探工作中,对矿体的控制、水文地质、矿石可选性试验等工作程度,高级储量比例,勘查周期等方面,宜根据实际情况,合理的加以确定。  相似文献   

硫铅酸盐“S”型瞬凝水泥干法护壁堵漏技术研究          下载免费PDF全文

彭振斌 《探矿工程》1995,(2):41-42,60

介绍了硫铝酸盐“Ｓ”型瞬凝水泥干法者漏时使用的配方,阐述了输送工具和扫孔钻具的设计以及灌注工艺技术。  相似文献   

Marine cements in mid-Tertiary cool-water shelf limestones of New Zealand and southern Australia   总被引：1，自引：0，他引：1  

Campbell S. Nelson  & Noel P. James 《Sedimentology》2000,47(3):609-629

Large areas of southern Australia and New Zealand are covered by mid‐Tertiary limestones formed in cool‐water, shelf environments. The generally destructive character of sea‐floor diagenesis in such settings precludes ubiquitous inorganic precipitation of carbonates, yet these limestones include occasional units with marine cements: (1) within rare in situ biomounds; (2) within some stacked, cross‐bedded sand bodies; (3) at the top of metre‐scale, subtidal, carbonate cycles; and (4) most commonly, associated with certain unconformities. The marine cements are dominated by isopachous rinds of fibrous to bladed spar, interstitial homogeneous micrite and interstitial micropeloidal micrite, often precipitated sequentially in that order. Internal sedimentation of microbioclastic micrite may occur at any stage. The paradox of marine‐cemented limestone units in an overall destructive cool‐water diagenetic regime may be explained by the precipitation of cement as intermediate Mg‐calcite from marine waters undersaturated with respect to aragonite. In some of the marine‐cemented limestones, aragonite biomoulds may include marine cement/sediment internally, suggesting that dissolution of aragonite can at times be wholly marine and not always involve meteoric influences. We suggest that marine cementation occurred preferentially, but not exclusively, during periods of relatively lowered sea level, probably glacio‐eustatically driven in the mid‐Tertiary. At times of reduced sea level, there was a relative increase in both the temperature and the carbonate saturation state of the shelf waters, and the locus of carbonate sedimentation shifted towards formerly deeper shelf sites, which now experienced increased swell wave and/or tidal energy levels, fostering sediment abrasion and reworking, reduced sedimentation rates and freer exchange of sediment pore‐waters. Energy levels were probably also enhanced by increased upwelling of cold, deep waters onto the Southern Ocean margins of the Australasian carbonate platforms, where water‐mass mixing, warming and loss of CO₂ locally maintained critical levels of carbonate saturation for sea‐floor cement precipitation and promoted the phosphate‐glauconite mineralization associated with some of the marine‐cemented limestone units.  相似文献   

CHANNEL EROSION DAMAGES AND PROTECTION MEASURES IN SOUTHEAST ARIZONA     

Fazle KARIM 《国际泥沙研究》1999,(2)

1INTRODUCTIONThesouthwesternregionoftheUnitedStates,includingSoutheastArizona,ischaracterizedbyasemiaridclimatewithhotsummers,mildwinters,andephemeralstreamsdrainingsparselyvegetatedareas.ChannelmorphologyoftheephemeralstreamsinSoutheastArizonaisinfluencedbybothlateralandverticalchannelchangesoccurringduringmajorfloods.Lateralchannelchangesoccurinthreewaysbankerosion,meandermigration,andchannelavulsion.Verticalchannelchangesinclude,beddegradationoraggradation,andmayoccurseparatelyorinco…  相似文献   

水氯镁石脱水反应的热力学计算   总被引：4，自引：0，他引：4       下载免费PDF全文

景燕  马培华  褚敏雄 《盐湖研究》1999,7(4):15-22

水氯镁石脱水制备无水氯化镁是一个多反应的复杂过程,文中对水氯镁石脱水制备无水氯化镁过程中可能存在的化学反应的热力学各函数进行了计算,对脱水反应机理进行探讨,并为生产提供理论依据  相似文献   

塔河3号油田石炭系储层孔隙特征及其影响因素   总被引：2，自引：0，他引：2  

张凤玖  宫继萍  张新海 《新疆地质》1999,(2)

通过对新疆塔河３号油田石炭系储层的压汞、铸体、电镜扫描、孔渗资料进行综合分析认为,该储层的孔隙总体不是很好。储层共分为四类,最好的也只是中孔－中渗－粗喉型。其孔隙较小、喉道连通性较好、喉道分选差、毛管压力无明显平台,影响孔隙的因素是碳酸盐胶结物的含量。  相似文献   

青海省盐湖钾、镁、锂盐资源开发利用探讨   总被引：4，自引：4，他引：4       下载免费PDF全文

严军  黄小良 《盐湖研究》2002,10(4):63-69

论述了青海省盐湖资源中钾、镁、锂盐工业的资源状况、生产现状以及开发利用的迫切性 ,并对钾、镁、锂盐资源的综合利用进行了探讨  相似文献   

青海盐湖氯化镁资源开发   总被引：8，自引：2，他引：8       下载免费PDF全文

乌志明  李法强 《盐湖研究》2001,9(2):61-65

青海盐湖中有丰富的氯化镁资源 ,由氯化镁可生产多种镁产品 ,特别是以青海盐湖卤水提钾老卤中的镁资源开发镁产品 ,既可获得经济效益 ,又可治理氯化镁老卤造成的危害与污染 ;开展高值镁产品的研究可为盐湖开发的纵深发展打基础  相似文献   

硅质碎屑砂岩中胶结物来源的新认识     

杨香华 《地质科技情报》1993,12(4):34-39

分析了浅埋藏砂岩的成岩环境,并从岩石学、矿物学、同位素及质量平衡估算方面论证硅质碎屑砂岩中的胶结物主要来源于砂岩浅埋藏期间的地下水,进而分析浅埋藏带内地下水的流动机制及早期胶结作用对晚期成岩作用的影响。  相似文献