Research on soil multi-media environmental pollution around a Pb-Zn mining and smelting plant in the karst area of Guangxi Zhuang Autonomous Region,Southwest China

The method of principal component analysis was applied to systematical research on the soil multi-media environment, including soil, surface water, ground water, waterbody sediment and agricultural crops, as well as pollution-inducing wastewater, mullock (or waste ore) and slag in the periphery of a large-sized Pb-Zn mining and smelting plant in a karst area of Guangxi Zhuang Autonomous Region. The results revealed that soils in the area studied have been heavily polluted by Cd, Zn, Pb and Hg, and the levels of these metals in the samples of agricultural crop greatly exceed the standards. The above-mentioned pollutants exist in all soil-multi-media environments. The mullock, slag, wastewater, surface water, ground water, soil, and agricultural crops constitute a composite ecological chain. Therefore, the improper disposal of mullock and slag, and the use of polluted wastewater for agricultural irrigation are the main causes of soil pollution. Heavy metals in the soil have three transition progresses: point (improved soil with slag, ground water inflow plot), linear (river transition) and non-point transition (regional pollution by slag) patterns, and the tailing yard is the most important locus for heavy metals to release into the environment.     

赣西北中元古界双桥山群岩石有限应变分析

对赣西北中元古界双山群岩石进行系统的有限应变测量,结果表明,双桥山群岩石的主要应变型为平面应主为,其对数Flinn参数K值在0．74－1．44之间,若石应变强度T值在2．59－4．60之间,平均为3．15,表明岩石应变强度较大,岩石有限应变强度具有南强北北,东强西弱的规律,有限应变的椭球X轴优势方位为近东西向,反映双桥山群岩石在变形作用过程中,近南北向压应力作用占主导地位。     

Toluene sorption behavior on soil organic matter and its composition using three typical soils in China

The effect of soil organic matter (SOM) content and composition on sorption behavior of toluene for fluvo-aquic, red and black soils in China was investigated in batch experiments. Tested SOM was fractionated into two primary sorptive domains (‘soft’ and ‘hard’) to explain the dependence of sorption behavior on SOM composition. All the tested soils exhibited similar sorption kinetics and nonlinear sorption isotherms. Soils with high SOM content possessed a high sorptive capacity. Clay minerals also contributed to the sorptive capacity, especially for fluvo-aquic and red soils with low SOM content. In comparison, after removing most ‘soft’ SOM fraction from soils through hydrogen peroxide treatment, the residual ‘hard’ SOM fraction of three soil samples exhibited a slower sorption rate and a less sorption capacity compared to the untreated soil samples. The nonlinear degree of sorption was positively correlated with the content of ‘hard’ SOM for all soil samples. This is explained by the combined effect of SOM content and the composition on toluene sorption rates, sorption capacity and nonlinear degree of sorption of three typical soils in China.     

赣南晚侏罗世九龙脑钨锡铅锌矿集区不同成矿类型花岗岩年龄、地球化学特征对比及其地质意义

九龙脑花岗岩体位于南岭东部,它周围分布着众多钨、锡和铅锌矿床(点).本文选择岩体北侧淘锡坑石英脉型钨矿、东侧宝山矽卡岩型铅锌矿底部的隐伏花岗岩,对比九龙脑岩体开展了成岩年代学、地球化学、Sr- Nd同位素研究.上述岩体的SHRIMP锆石U-Pb年龄分别是158.7±3.9Ma、157.7±2.7Ma、154.9±2.2...     

西天山琼阿乌孜超基性岩体的稀土元素和Sr,Nd同位素研究

对西天山琼阿乌孜超基性岩体和围岩片麻岩作了Ｓｍ、Ｎｄ、Ｒｂ、Ｓｒ同位素和稀土元素的研究，获得岩体的形成年龄为３１４±１９Ｍａ，∑ＲＥＥ约为４．０～７．６μｇ／ｇ。其主体岩石是由来源于未亏损地幔较高程度熔融而产生的岩浆在结晶分异作用中形成。其岩体的边缘［εＮｄ＝－５，（８７Ｓｒ／８６Ｓｒ）＝０．７０５５，∑ＲＥＥ＝１１１．５６μｇ／ｇ］同化了围岩［εＮｄ＝－１６．７，（８７Ｓｒ／８６Ｓｒ）ｉ＝０．７５３７，∑ＲＥＥ＝１９６μｇ／ｇ］，并同时发生结晶作用，经历了ＡＦＣ过程，形成了特有的琼阿鸟孜超基性岩侵入体。     

新疆阿拉套山成矿作用：区域背景、矿源和模式

本文研究了新疆阿拉套山地区成矿作用的区域地质背景、成矿物质来源、成矿的物理化学条件和矿质的迁移富集,据此建立了该区的成矿模式,提供了一个在较小范围内研究和对比两类花岗岩对应两套成矿系列的典型范例.     

Nutritional lipid liver disease of grass carpCtenopharyngodon idullus (C. et V.)

The inadequate nutrient content of pellet feeds widely used in recent years in China for grass carp farming led to lipid liver degeneration in the fish. The present studies show that the pathological features of lipid liver disease are anaemia and hepatic ceroidosis. Other clinical features are; the ratio of liver to body weight exceeds 3% and lipid content exceeds 5%. Extreme infiltration of hepaiocytes by lipid results in the following deteriorative effects: swelling of the liver cells, increase of lipid droplets in the cytoplasm and dislocation of the nucleus, loss of cytoplasm staining affinity, and increased activities of GOT and GPT in serum. Lipid liver degeneration of grass carp can be divided into three stages: 1) deposition of liver lipid; 2) lipid infiltration of hepatic parenchyma; 3) atrophy of liver nucleus. The causes of lipid liver degeneration are complicated, but the main cause is assumed to be an imbalance of nutrients in daily feed and the lock of some lipotropic substances. A preliminary paper presented at the Asian Symposium on Freshwater Fish Culture, Beijing, October 11–15, 1985.     

Compensatory growth in hybrid tilapia (<Emphasis Type="Italic">Oreochromis mossambicus ×O. niloticus</Emphasis>) reared in seawater,following restricted feeding

Hybrid tilapia weighing 7.71 g were reared in seawater at 24.0–29.0°C for 8 weeks. The controls were fed to satiation twice a day throughout the experiment, whereas treatment groups were fed at 0.5%, 1.5% or 3.0% body weight per day for 4 weeks, and then to satiation for the remainder of the experiment. During the first 4-week period, there was a curvilinear relationship between growth rate and ration size. Fish fed 0.5% and 1.5% rations displayed compensatory growth response of 2 weeks duration during realimentation. The weight-adjusted growth rate of fish fed at 3% ration was not significantly different from that of the controls by the end of the experiment, when none of the treatment groups had caught up in body weight with the controls. Hyperphagia was observed for the first 2 weeks of realimenatation in fish previously fed at 3% ration, but persisted for the whole realimentation period in groups previously fed at 0.5% and 1.5% rations. None of the feed restricted groups showed improved digestibility, feed efficiency, or protein and energy retention efficiency. Supported by the State Key Laboratory of Freshwater Ecology and Biotechnology of China and Shanghai Fisheries University (Grant No. 200015).     

赣南隆坪萤石矿床成矿时代及成因初探：来自萤石Sm-Nd测年及黑云母电子探针的证据

隆坪萤石矿床是赣南已探明的大型单一萤石矿床，矿体产于永丰复式岩体外接触带北东向硅化破碎带中。文章首次 采用Sm-Nd等时线法对隆坪萤石矿进行测年和稀土元素分析，并对永丰复式岩体中黑云母矿物成分进行了系统的测试；获 得了隆坪萤石矿的成矿年龄为158±3 Ma，与永丰复式岩体的成岩时代基本一致，表明该矿床萤石成矿作用与晚侏罗世岩浆 活动关系密切。隆坪萤石矿中萤石轻稀土元素略富集，重稀土相对平坦，具微弱Ce正异常（δCe=1.08~1.11，平均1.09） 和 微弱Eu负异常（δEu=0.91~0.98，平均0.95），指示了萤石矿床的成矿流体经历了相对较高的温度。黑云母电子探针分析结 果证实永丰复式岩体形成于相对高温、低压和高氧逸度的环境，岩浆起源于古老地壳物质的部分熔融，岩浆结晶分异晚阶 段岩浆期后热液富含F等挥发分。隆坪萤石矿床形成于晚侏罗世，成因类型为岩浆期后热液充填型。     

中国南部地区大气加权平均温度模型精化研究

针对中国南部地区地势西高东低、沿海与内陆存在差异等情况,分析中国南部地区T_m与地面温度、测站高度、季节变化以及纬度的关系,利用中国南部地区19个探空站2015~2017年的探空数据,在Bevis公式的基础上建立只考虑地面温度的线性模型（T_m-SC1模型）和与地面温度、高程、季节变化以及纬度有关的新T_m模型（T_m-SC2模型）。以2018年的探空数据为参考值,对T_m-SC1模型和T_m-SC2模型进行精度验证,并与广泛使用的Bevis公式和GPT3模型进行精度比较。结果表明,T_m-SC1模型的年均偏差和均方根误差（RMS）分别为0.76 K和2.57 K,相比Bevis模型和GPT3模型,其精度（RMS值）分别提高13.8%和2.2%;T_m-SC2模型的年均偏差和均方根误差（RMS）分别为-0.10 K和1.64 K,相比Bevis模型和GPT3模型其精度（RMS值）分别提高44.9%和37.6%。T_m-SC2模型用于GNSS水汽计算导致的理论RMS误差和相对误差分别为0.16 mm和0.43%。因此,T_m-SC2模型更适用于中国南部地区的GNSS水汽探测以及气象研究。