Quartz-Ferberite Oxygen Isotope Geothermometer and Its Geological Applications

Experiments for oxygen isotope exchange between ferberite and water were carried out and the followingequation on oxygen isotope fractionation between ferberite and water against temperature was obtained:Combining this equation with the equation of Clayton et al. (1972) on oxygen isotope fractionation be-tween quartz and water, an equation on oxygen isotope fractionation between quartz and ferberite was ob-tained:The Bigeleison-Mayer function method was used to calculate the oxygen isotope fractionation betweenquartz and ferberite. The theoretical curve obtained agrees with the experimental calibration results quite wellin the temperature range of study.The above calibrated equation has been used in 5 world famous tungsten deposits to determine their tem-peratures of formation. The results show that the temperature range for an idividual deposit determined by thisgeothermometer agrees with those obtained from fluid inclusion determination and other isotopegeothermometers.     

江西永平铜矿田构造地球化学

本文在对永平铜矿田构造调查研究的基础上,初步探讨了矿田主要控岩控矿构造——F_1断裂构造地球化学和候家—嵩山倒转背斜褶皱构造地球化学,以及构造应力对矿液和成矿物质的运移与富集的影响——成矿构造地球化学。最后还提出了永平铜矿田构造地球化学成矿模式。     

某些幔源矿物晶体中异常消光现象的显微喇曼谱研究

异常消光是一种在幔源晶体中常可观察到的物性改变现象,然而它与晶体的真实结构之间的内在联系却至今仍未被认识清楚。本项工作试图用一种灵敏的微区结构探测新技术——显微激光喇曼谱方法研究幔源晶体中由构造作用导致的异常消光现象的结构本质。实验结果说明:上地幔高温蠕变作用对橄榄石及辉石主要感应了晶体内微区晶轴取向的变化,还未能产生明显的结构相变;不同的异常消光现象反映晶轴扭转的单位大小不同,并主要依赖于矿物晶体本身的结构特性。     

中国地质学会2020年度“十大地质科技进展”

大庆油田等:松辽盆地北部古龙页岩油勘探取得重大发现大庆油田在松辽盆地北部古龙凹陷青一段地层的纯页岩内实现水平井产量重大战略突破,试油获高产工业油气流,定产试采表现出稳定的高产能力,平面上15口直井试油证实古龙页岩油平面分布范围广,规模立体含油,轻质油带具有较好的产油能力,轻质油带页岩油气资源量达到几十亿吨。通过岩心精细描述及实验分析化验数据,建立了以古沉积环境控制原始优质烃源岩发育、适中的热演化程度控制油气富集。     

1:25万斯诺乌山幅、狮泉河幅地质调查成果与进展

地层方面,在测区札达陆块厘定出念青唐古拉岩群;在措勤-申扎地层分区发现坚扎弄组在测区的存在,新建淌那勒组;将则弄群火山岩解体;根据化石,则弄群弧火山岩的形成时间为早白垩世;确认狮泉河蛇混岩带的形成时间是晚侏罗世—早白垩世;将才里群解体。岩石方面,在测区不同时代地层中发现火山岩系,填绘出了一系列火山机构;将中新生代深成侵入岩划分为拉轨岗日花岗岩带和冈底斯花岗岩带两个岩浆带;发现浆混岩系。构造方面,发现雅鲁藏布江结合带南北支在图区的存在;证实狮泉河带内存在洋脊蛇绿岩套,狮泉河带存在俯冲;确认班-怒带的南支向北与狮泉河带斜接。     

1:25万帕度错幅、昂达尔错幅成果与进展

新建9个正式岩石地层单位、4个非正式地层单位;将上三叠统日干配错群解体为6个岩石地层单元;解体中上侏罗统雁石坪群;将色哇组分为三段;将班公湖-怒江带木嘎岗日群解体为4个岩石地层单元;在西藏首次发现(上三叠统姜钟组)纳拉菁耳羽叶;在羌塘盆地首次发现(下—中侏罗统色哇组)辐鳍鱼类化石;新建8个侵入岩填图单位,时代为晚侏罗世—新近纪末期;在班-怒结合带塔仁本一带首次发现了洋岛型玄武岩;新发现了一系列新生代岩浆岩;在班-怒带及南羌塘盆地中发现一些呈串珠状分布的小型斑岩体;发现班-怒带上时代最新的枕状玄武岩。     

1:25万毕节县幅、遵义市幅地质调查成果与进展

在毕节青场桐梓组顶部至石炭系中发现有大量的暴露构造现象;发现毕节地区中二叠世茅口期存在两条走向北北东、宽10~50km的“黑区带”;在威信县城第四系中发现大量象牙、牙齿及骨骼化石;在凤冈琊川、遵义茅坡及威信鱼井等新发现多个志留纪植物化石;对黔中隆起进行了研究。     

城市污泥接种堆置处理对重金属的形态及其生物有效性的影响

污泥堆肥化后的土地利用是污泥处理处置的重要方法之一。经过对荆马河底泥接种堆置处理,揭示出污泥中重金属的形态发生明显的变化。荆马河底泥中的重金属污染物主要以结合态和残渣态的形式存在,水溶态和交换态的量很小,经接种堆置处理后,水溶态和交换态量大幅削减,结合态和残渣态量有所增加,总量变化不大,生物学方法和化学方法测定都表明,处理后的底泥生物毒性有明显降低,重金属的生物有效性降低。     

Massive Sulphide Deposits Related to the Volcano-Passive Continental Margin in the Altay Region

The Devonian volcano-passive continental margin in southern Altay is a significant volcanogenic massive sulphide metallogenic belt. Acidic volcanism has been dominant on the inner side of the volcano-passive continental margin, i.e., near the old land, resulting in a Pb-Zn metallogenic sub-belt, in which the ore deposits are hosted by sedimentary rocks in volcanic series, as represented by the large Koktal Pb-Zn deposits. In the central part of the margin far away from the old land, bimodal volcanic formations are well developed, forming volcanics-hosted Cu-Zn metallogenic sub-belts, e.g., the large-scale Ashele Cu-Zn deposit. The Qiaoxiahala sub-belt on the outer side of the margin near the ocean ridge is located at the spreading central trough, where ophiolite suites are developed. This type of deposits is rich in gold and copper, similar to the Cyprus-type Fe-Cu-Au metallogenic sub-belt in metallogenic environment (represented by the Qiaoxiahala medium-scale Fe-Cu-Au deposit). From the old land to th