Organochlorine contaminant exposure and associations with hematological and humoral immune functional assays with dam age as a factor in free-ranging northern fur seal pups (Callorhinus ursinus)

Potential effects of organochlorine contaminant (OC) exposure on humoral immune function and health of free-ranging northern fur seals were investigated. Forty-two "neonates" were captured for blood sample collection and re-sampled as "pups" 29-51 days later. OCs were extracted from whole blood to identify polychlorinated biphenyl congeners and chlorinated pesticides by high performance liquid chromatography. Humoral immune function was assessed by antibody responses to vaccination and immunoglobulin concentrations. Additional health status indicators included leukocyte counts and haptoglobin concentrations. Mean OC concentrations were higher in neonates than at recapture. Neonates of young dams had higher mean OC concentrations than neonates of older dams. A higher proportion of old dam's pups developed a twofold or greater increase in antigen-specific antibodies compared to young dam's pups. Higher OC exposure and poor immune responses in first-born pups may indicate a higher risk of secondary morbidity and mortality than pups of multiparous dams.     

扬子克拉通太古代崆岭群角闪岩相与麻粒岩相岩石的岩石磁学研究

提供了扬子克拉通太古代基底崆岭群２０件代表性岩石样品的密度与磁性参数的测量结果．结果表明，变碎屑岩与ＴＴＧ（英云闪长－奥长花岗－花岗间长质）片麻岩（１３个样品）的磁化率与饱和剩磁普遍大于斜长角闪岩和辉长岩．前者的磁化率与饱和剩磁平均值分别为１２１３×１０^－６ＳＩ与１９．９４Ａ／ｍ，而后者的则为８０２×１０^－６ＳＩ与１０．７７Ａ／ｍ．变碎屑岩与ＴＴＧ片麻岩呈明显的亚铁磁性状态；斜长角闪岩和辉长岩则以顺磁性或顺磁性与亚铁磁性混合状态分布为主．热磁分析结果表明，变碎屑岩与ＴＴＧ片麻岩的剩磁载体以磁铁矿与磁赤铁矿为主；斜长角门岩和辉长岩则明显含有磁黄铁矿与次要的磁铁矿．变碎屑岩与ＴＴＧ片麻岩的磁性具有很强的非均一性．推断崆岭群中的变碎屑岩为麻粒岩相变质级，视深度相当于大陆下地壳；而斜长角闪岩的变质级明显低于变碎屑岩，可能为角门岩相，视深度相当于中地壳．变碎屑岩与ＴＴＧ片麻岩磁性的强非均一性可能与该区后期广泛发生的混合岩化作用密切相关。     

桐柏—大别地区中温热液金矿床同位素地球化学特征

本文收集整理了桐伯－大别地区与中温热液金矿床有关的氢，氧，硫，铅同位素组成数据，分析整理结果表明，成矿流体和成矿元素及硫可能来自不同的来源，流体主要为大气降水，成矿元素和硫主要来自流体下渗及回返过程中流经的各类岩石，成矿流体的这种性质对于造山内带及两侧金矿化的产出规律具有相当程度的影响。     

长江中下游中生代花岗岩类源区的壳—壳混源性质

长江中下游地区中生代花岗岩类形成于大别造山带碰撞后岩石圈物质的调整演化过程。Ｓｒ、Ｎｄ、Ｐｂ同位素组成数据表明，早、晚阶段花岗岩类具有相似的壳－壳混合源区性质，其主要源岩端员可能分别相当于以大别杂岩为代表的深变质岩系和中、新元古界底侵（ｕｎｄｅｒｐｌａｔｉｎｇ）基性物质与部分古元古界沉积－火山－侵入岩系组成的扬子陆块下地壳岩石。这两种成分不同的下地壳物质在这里呈指状穿插体结构。长江中下游地区下地壳在碰撞造山过程中曾是大别地块与扬子地块之间的深部构造混杂带。本文主要根据各类已有的Ｓｒ、Ｎｄ、Ｐｂ同位素组成资料讨论花岗岩类的源区性质问题     

广西栗木稀有金属花岗岩的稀土元素配分模式及其意义

本文探讨了栗木稀有金属花岗岩稀土元素配分模式的特点。含矿花岗岩和不含矿花岗岩含稀土总量均低,但其稀土配分模式差别甚大。该岩体可能是南岭地区由成分相当于翁岗岩浆的碱长花岗岩浆直接结晶形成的,而不是由正常花岗岩浆演化到晚期的残余岩浆结晶形成的。     

云南个旧矿集区区域构造-岩浆演化与锡铜多金属成矿系统

个旧矿集区是滇东南最重要的锡铜多金属矿产地之一, 形成了云英岩-石英脉型矿化、与矽卡岩化有关的锡石-硫化物型矿化、蚀变基性火山-次火山岩型矿化和与断裂有关的各种脉型矿化构成的锡铜多金属成矿系统.根据区域构造-岩浆演化与锡铜多金属矿化系统的配置关系研究, 认为燕山晚期复式花岗岩体侵位进入以中三叠统为主的碳酸盐岩地层组成的褶皱带中, 锡铜等金属元素的成矿富集产生于花岗岩体与围岩接触带及其附近发生的接触交代和更远处发生的交代-充填过程, 成矿元素主要源自燕山期中下部地壳物质熔融形成的花岗岩浆和印支期裂谷环境中来自地幔的玄武岩-辉绿岩-辉长岩类, 多期脉动式的岩浆活动驱动了一个长效的热液系统, 这些要素共同构筑了这一巨量的金属矿集区.由此建立了个旧矿集区的区域成矿模型, 并对进一步寻找新的矿化类型提出了理论线索.      

The nature and fate of natural resins in the geosphere. XII. Investigation of C-ring aromatic diterpenoids in Raritan amber by pyrolysis-GC-matrix isolation FTIR-MS

Upper Cretaceous amber from the Raritan Formation (Sayerville, New Jersey) has been investigated by Pyrolysis-GC-MS and Pyrolysis-GC-matrix isolation FTIR-MS. Results establish the existence of two distinct forms of amber in this deposit. Both forms are Class Ib ambers, but they are unambiguously differentiated on the basis of their (intact) diterpenoid composition. The presence of callitrisate in both forms, and cupraene in samples designated form 1, strongly suggest that both derive from related-but-distinct species within the Cupressaceae.     

Recommendations on methods for the detection and control of biological pollution in marine coastal waters

Adverse effects of invasive alien species (IAS), or biological pollution, is an increasing problem in marine coastal waters, which remains high on the environmental management agenda. All maritime countries need to assess the size of this problem and consider effective mechanisms to prevent introductions, and if necessary and where possible to monitor, contain, control or eradicate the introduced impacting organisms. Despite this, and in contrast to more enclosed water bodies, the openness of marine systems indicates that once species are in an area then eradication is usually impossible. Most institutions in countries are aware of the problem and have sufficient governance in place for management. However, there is still a general lack of commitment and concerted action plans are needed to address this problem. This paper provides recommendations resulting from an international workshop based upon a large amount of experience relating to the assessment and control of biopollution.