鄂尔多斯高原地下水固碳能力研究

利用不同深度地下水的二氧化碳含量,结合粒子示踪技术确定不同深度地下水的循环量,对鄂尔多斯高原地下水的固碳能力进行了估算。结果表明,浅层地下水二氧化碳含量为0.02～6.45 mg/L,中、深层地下水不含二氧化碳;浅层地下水的循环量占总循环量的82.4%,中、深层地下水的循环量占总循环量的17.6%;鄂尔多斯高原地下水的固碳能力约为2 470 t/a。     

Rheological and micro-Raman time-series characterization of enzyme sol–gel solution toward morphological control of electrospun fibers

Abstract

Rheological and micro-Raman time-series characterizations were used to investigate the chemical evolutionary changes of silica sol–gel mixtures for electrospinning fibers to immobilize an enzyme (tyrosinase). Results of dynamic rheological measurements agreed with the expected structural transitions associated with reacting sol–gel systems. The electrospinning sols exhibited shear-thinning behavior typical of a power law model. Ultrafine (200–300 nm diameter) fibers were produced at early and late times within the reaction window of approximately one hour from initial mixing of sol solutions with and without enzyme; diameter distributions of these fibers showed much smaller deviations than expected. The enzyme markedly increased magnitudes of both elastic and viscous moduli but had no significant impact on final fiber diameters, suggesting that the shear-thinning behavior of both sol–gel mixtures is dominant in the fiber elongation process. The time course and scale for the electrospinning batch fabrication show strong correlations between the magnitudes in rheological property changes over time and the chemical functional group evolution obtained from micro-Raman time-series analysis of the reacting sol–gel systems.     

Chronological Link Between the Abrupt Change of the Loess Grain Size Sequence and the Formation of River Terraces on the Eastern Margin of the Qinghai-Tibetan Plateau Since the Late Early-Pleistocene

Based on the study of magnetostratigraphy, magnetic susceptibility and grain size of Garz(e) A section on the southeastern margin of the Qinghai-Tibetan Plateau since the late early-Pleistocene, the basal age of Garz(e) loess is located at ～1.16 MaBP and a series of abrupt paleoclimatic changes is detected. The times of abrupt changes are of distinct series features, and the interval between each two adjacent abrupt changes is～50 kyr or ～100 kyr. The most significant abrupt changes occur at around 1.06, 0.85, 0.6, 0.46, 0.39 and 0.14 MaBP. There is a chronological link between the abrupt changes of paleoclimate and the formation of river terraces and it is almost simultaneous with a strengthening trend of neotectonic activities. Therefore, maybe the climatic transition contrail the timing of terrace formation, and the tectonic uplift originate potential energy and has a direct effect on channel incision,both the climatic transition and the tectonic uplift are important. Terraces are the products of the interaction of instable climatic variations and tectonic uplift. Like the loess-paleosol sequences, river terrace sequences are also controlled by the climate-tectonic coupling system and are ruled by climate-tectonic gyration with a ～100 kyr paracycle, which may be the short eccentricity period of the earth.     

云南澜沧老厂银铅锌矿床成因研究

通过矿床地质特征、遥感图象解译、隐伏岩体预测、包体成分、成矿温度及稳定同位素等研究,认为老厂银铅锌矿床与金铜系列隐伏岩体有关,成矿时代为 50～86 Ma,成矿溶液以初始岩浆水为主,伴有雨水参与,成矿物质具多来源性,矿床属中温略偏高温的热液矿床。     

云锡公司磨矿工艺改造研究

分析了云锡公司各厂磨矿工艺现状及存在问题，在此基础上提出解决云锡公司磨矿问题的各种方案及建议。解决粗磨方案包括（１）降低棒磨机给矿粒度及减小磨矿比；（２）用周边排料棒磨机取代中心排料棒磨机；（３）用筛子取代螺旋分级机。解决细磨的方案包括：（１）改开路磨矿为闭路磨矿；（２）改格子型球磨为溢流型球磨；（３）介质尺寸精确化；（４）介质形状适宜，用短柱形介质细磨。     

滇西中新生代锡矿带与大地构造演化的关系

滇西中新生代锡矿带属于中新特提斯成矿带的组成部分,位于海陆壳俯冲带陆壳仰冲一侧,与造山花岗岩带密切相关。根据中新生代板块活动的主要事件,可分为四个成矿期。由东往西锡矿化世代依次变新,与板块活动事件逐次推迟相关联。在一定程度上,锡矿化不依赖于围岩,主要依附于陆壳仰冲侧造山花岗岩带。雅鲁藏布江缝合带与龙木错—双湖—丁青—北澜沧江—柯街—孟定缝合带之间的区域是我国西南寻找中新生代锡矿床最佳远景区域,其中主要探索对象是晚三叠世至早始新世造山花岗岩带和与造山花岗岩带相联系的地质体。     

中国南方岩溶砂锡矿的分布

岩溶砂锡矿是中国南方第四纪沉积物中的一种重要矿床类型,具有矿层厚、品位高、工业价值大等特点。本文介绍了中国南方岩溶砂锡矿的分布规律、主要矿床类型,并指出了该区的找矿方向。     

云南老厂银铅锌矿区火山岩特征

根据云南老厂火山岩的岩石学、岩石化学成分特征,可将下石炭统火山岩划分为5层、4旋回、4相、3个相组。其中:C_1～C_1~3为岛弧型玄武岩系列,C_1~4和次火山岩为大陆板块边沿裂谷碱性玄武岩系列,C_1~3为C_1~2钠质粗面质岩浆与C_1~4碱性玄武岩浆混合作用的产物。     

思茅松,云南松,高白度化学浆漂白程序的最佳选择

在试验条件下，采用氧化碱抽提（Ｅ０），用ＣｌＯ２部分替用Ｃ段的氯（Ｄ／Ｃ）、高温次氯酸盐漂白（Ｈ（７０））和短程序化等新技术，对思茅松云南松本色硫酸盐浆进行了高白度漂白的初步研究，试验结果认为，采用ＣＥ０ＤＰ或Ｄ（５０）／Ｃ（５０）Ｅ０ＤＰ程序，能达到８５％以上的高白度。     

龙陵——潞西地区花岗岩矿物中熔融包裹体研究

笔者通过对龙陵—潞西地区各个花岗岩体矿物内包裹体的研究,获得以下认识: 1.各花岗岩体中各种类型的固相和多相流体包裹体的出现,说明(?)区花岗岩浆经历了高温到低温逐渐冷却的演化过程。 2.发现了熔融玻璃质(结晶质)一流体包裹体。这种特殊类型包裹体的出现,说明原始岩浆是极不均匀的.并富含水等挥发性组份。 3.燕山期的岩浆活动从早期到晚期形成的岩体,它们的成岩温度是逐渐降低的,从1020℃到800—850℃。 4.研究表明该区花岗岩应是重熔岩浆型花岗岩,属壳源成因系列。