粉煤灰活化机理及胶凝材料的研究

对煤粉增钙燃烧过程中粉煤灰活化机理及活化粉煤灰的特性进行了实验研究，结果表明，通过增钙工艺，高钙煤粉在１２００～１４００℃温度下燃烧，形成含钙量较高的高钙玻璃体，使粉煤灰在高温下活化．活化粉煤灰中主要矿物为β－Ｃ２Ｓ，Ｃ４ＡＦ，Ｃ３Ａ，Ｃ５Ａ３，此外还有Ｃ（１２）Ａ７，Ｃ２Ｆ，ＣａＳＯ４，ＣａＯ及活性ＳｉＯ３等结晶矿物，当活化粉煤灰中ＣａＯ含量在２１％～２５％时，加入适量的强度激发剂并提高磨细度，就可将活化粉煤灰直接转换成３２５＃低能耗的粉煤灰水泥．     

微细金矿物的扫描电镜研究

作者应用 SEM 及 EDX 对黄铁矿中微细金矿物的赋存状志、化学组成、矿物颗粒形貌特征等方面进行了深入研究。研究结果表明,金矿物为 Au-Ag-Te 矿物系列.其形貌为圆球形状,直径大小0.05～1.5μm,此结果对黄铁矿中微细金矿物的提取工艺有一定的指导意义。     

Clay minerals in paleosols of cretaceous age in Istria, Croatia

Greenish clays often occur as thin layers in Early Cretaceous shallow-water carbonate sediments of Istria where they mark the top of fining upwards sequences. When they show evidence of subaerial exposure and pedogenesis they are considered paleosols. The clay mineralogical composition is as follow: (1) randomly oriented I/S mixed layer, (2) regularly oriented I/S mixed layer, (3) illitic material, (4) kaolinite and (5) chlorite. The insoluble limestone residue situated immediately below the greenish clays is dominated by smectite, and also contains kaolinite and illitic material. The very high smectite content in the insoluble residue is probably the result of additions of volcanic dust during carbonate sedimentation. That clay mineral composition in the pelitic material clearly indicates the influence of both pedogenic and diagenetic processes. It may also indicate additional volcanic dust contribution before and during the subaerial exposure.     

塔里木盆地北缘塔里克地区砂岩型铀矿目的层成岩演化与铀成矿作用

前人研究认为,塔里克是塔里木盆地北缘砂岩型铀矿有利的成矿地区。为了查明该区含矿目的层克孜勒努尔组岩石学特征、成岩序列与铀富集的关系,通过野外露头岩性观察、剖面测量和系统的取样,对塔里克地区目的层砂岩进行系统的研究;并对塔里克地区的铀矿石进行电子探针分析,对铀的分布规律进行总结。研究表明,塔里克矿点目的层砂岩属岩屑砂岩,为近源沉积产物;成岩作用较弱,主要分为碎屑沉积阶段、早成岩阶段、中成岩阶段、晚成岩阶段、表生流体改造阶段五个阶段,电子探针分析结果显示,塔里克地区铀的主要存在形式为沥青铀矿,铀矿分布与沥青、有机质密切相关。研究将为塔里克地区以及塔里木盆地北缘的下一步找矿工作提供理论依据。     

东营凹陷南斜坡东部地区沙四段储层成岩作用研究

东营凹陷南斜坡东部地区沙四段储层岩性主要有砂砾岩、砾状砂岩、砂岩和粉砂岩,砂岩类型以岩屑长石砂岩为主,长石砂岩和长石岩屑砂岩次之.成岩矿物类型主要有粘土矿物、石英、长石、碳酸盐、黄铁矿等,其中粘土矿物有高岭石、伊利石、绿泥石、伊-蒙混层.储层成岩演化阶段处于晚成岩A1亚期,油气注入时间为7.5～25 Ma前.砂岩储层成岩相划分为三种类型:压实成岩相、碳酸盐胶结成岩相和不稳定碎屑溶蚀成岩相.储层性质明显地受到成岩相的控制,水下辫状河道砂体是油气储集的主要场所.     

Characterization of Fe-S minerals influenced by buried ancient woods in the intertidal zone, East China Sea

An ancient wood layer dated at about 5600 cal. a BP by AMS14C dating was discovered in the intertidal zone, East China Sea. Samples affected by ancient woods, including fresh coast bedrock, weathering bedrock, seepage water from coast, seepage water from ancient wood layer, intertidal seawater, fresh water, beach mud, ancient wood barks and ancient peat, were collected for geochemical analysis. The beach mud and the bacteriogenic iron oxides （BIOS） in coastal seepage water were analyzed by min- eralogical and high-resolution transmission electron microscopy （HRTEM）-selected area electron dif- fraction （SAED） analysis. Inorganic sulfur compositions and b＇34S of the ancient peat and the beach mud were determined. The results showed that Fe, Mn, S （SO~-） were enriched in the intertidal area at different levels, very likely caused by fermentation of ancient woods. The presence of abundant iron- oxidizing bacteria （FeOB） and sulfate-reducing bacteria （SRB） in this intertidal zone was confirmed by HRTEM-SAED observation, and these bacteria were involved in Fe-S cycle to induce extracellular biomineralization. The negative ~4Sv.cDT （--2.9%o） likely indicated the biogenic origin of iron-sulfide minerals in the beach mud at high sulfate reduction rate （SRR）. These findings are helpful for under- standing the biogeochemical Fe-S cycle and biomineralization process at high organic matter deposition rate and high SRR in the intertidal zone, estuary, or near shoreline.     

苏宏图白垩系粘土岩元素地球化学和粘土矿物特征及其古气候意义

为了探究苏宏图地区白垩系苏红图组的古气候环境,应用X射线荧光光谱(XRF) 和电感耦合等离子体质谱(ICP-MS) 方法研究了粘土岩样品的元素地球化学特征,结果表明：P、Mn、Sr/Cu、Mg/Ca、SiO2/Al2O3等元素特征指示白垩系苏红图组总体呈现极度干燥的沉积环境,不同亚相之间沉积环境稍有干湿变化,且扇三角洲相对湿暖;通过XRD和SEM方法研究了全岩矿物组成和粘土矿物类型和组合特征,结果表明：伊利石为主要的粘土矿物,其次为绿泥石、高岭石,粘土矿物的组合类型为伊利石、绿泥石的组合,且绿泥石和高岭石呈现此消彼长的现象,反映了干燥寒冷的沉积环境,并伴随着干湿的气候变化。     

海拉尔盆地贝尔凹陷大磨拐河组二段物源分析

利用贝尔凹陷大磨拐河组二段11口井重矿物资料,根据重矿物组合类型、含量及特征,结合代表重矿物成熟度的ZTR指数变化情况进行分析．结果表明,贝尔凹陷大磨拐河组二段时期母岩类型为中基性一中酸性岩浆岩;重矿物ZTR指数值由凹陷北部边缘向中部由小逐渐变大,由此判断贝尔凹陷大磨拐河组二段时期物源为凹陷的北部地区．     

危机矿山可接替资源预测评价若干问题探讨

危机矿山可接替资源预测评价与开发利用研究,面临难识别、难发现、难利用和新类型、新深度、新工艺等问题,不但需要以科学的资源观、求异的思维、系统的观念和超前的意识为指导,而且必须重视新理论、新技术、新方法的联合攻关.开源与节流并举是危机矿山可接替资源预测评价的基本原则;危机矿山深部找矿、外围找矿和矿内找矿是三大战略方向;新类型或"地区性新类型"矿床是危机矿山找矿预测的主要目标.针对危机矿山,"三联式"矿产预测评价理论研究与方法实践,关键问题在于:新型的、隐性的和深层次的致矿地质异常信忠的有效提取,以及地质多样性与成矿多样性的有机关联分析.     

松辽盆地扶新隆起带北部新庙西-新北地区扶余油层物源分析

物源方向研究是沉积相研究的重要内容,物源方向代表了地质历史时期古水流的方向,控制了砂体的展布范围和延伸趋势。因此物源方向的分析和研究对沉积相展布、储层评价及油气成藏等综合分析起着重要作用。本文结合盆地区域地质背景、重矿物组合、砂地比及古地貌特征,对松辽盆地新庙西新北地区扶余油层进行物源分析。结果表明,新庙西新北地区扶余油层存在两大物源体系,分别是西南方向以锆石为主要重矿物类型的西南保康物源体系和以石榴石为主、锆石次之的南部怀德物源体系,两大物源体系共同控制了新庙西新北地区泉四段沉积时期砂体的形成和分布,并且形成了"多物源混源沉积、各物源源间存异、各时期继承发育"的沉积格局。