Seasonal variation of organochlorine contaminants in bonito (Sarda sarda L. 1758) and anchovy (Engraulis encrasicolus L. 1758) in Black Sea region, Turkey

The concentrations of indicator polychlorinated biphenyls (PCBs) and organochlorine insecticides were determined in bonito (Sardasarda L. 1758) and anchovy (Engraulisencrasicolus L. 1758) from the Black Sea, Turkey. Concentrations of total indicator PCBs ranged between <1-17.0 in bonito, and <1-17.5 ng/g fresh weight in anchovy, and total of 1,1,1-trichloro-2,2-bis-chlorophenyl-ethane and its metabolites’ (DDTs) concentrations ranged between 13.4-26.3, and 2.96-19.0 ng/g fresh weight in bonito and anchovy respectively. PCB 52, p,p′-DDE and endosulfan (α + β) were found dominant in both of the fish species. Except endosulfan, and some DDT metabolites, none of the studied organochlorine pesticides was detected in the fish samples. Concentrations of PCBs in anchovy were found higher than those in bonito, whereas DDT and endosulfan concentrations were found similar in both of the fish species. All of the fish samples had residue concentrations below the maximum residue limits (MRL) recommended by FAO/WHO Codex Alimentarius Commission.     

Persistence and developmental transition of wide seismic lines in the western Boreal Plains of Canada

This study examined the fate of seismic lines utilized in oil and gas exploration in Canada's western Boreal Plains. It retrospectively followed the persistence, recovery and developmental transition of seismic lines established between the 1960s and the mid-1970s through to 2003. We examined lines that passed through three forest types; aspen, white spruce, and lowland black spruce. In general, the recovery rates of seismic lines to woody vegetation were low. After 35 years, 8.2% of seismic lines across all forest types had recovered to greater than 50% cover of woody vegetation. Only the upland forest types recovered; aspen and white spruce. Most seismic lines ( approximately 65% at 35 years) remained in a cleared state with a cover of low forbs. The most common transition for seismic lines was to tracked access ( approximately 20% at 35 years). Transition to other anthropogenic developments such as roads, pipelines, buildings, and timber harvest blocks was 5% after 35 years. The pulse of industrial activity initiated in the mid-1990s greatly increased the transition rate of seismic to tracked access for a short period of time. The discussion focused on natural and anthropogenic factors that hinder recovery and on the management directions that would facilitate greater recovery rates.     

石油勘探环境风险评价

通过对石油勘探开发过程中可能发生的环境风险进行识别和分析,提出了预防环境风险的方法和对策。为最大限度地降低风险,防止企业人员伤害、财产损失及环境破坏确定了管理目标,是石油企业实施HSE管理的一项重要内容。     

石油勘探开发过程中推行清洁生产初探

就如何搞好石油勘探开发过程中的清洁生产进行了研究和探讨，总结了现行的清洁生产技术。对搞好石油勘探开发过程中的环保工作有一定的作用。     

卡林型金矿找矿新进展及其意义

在我国 ,卡林型金矿曾被当作典型层控矿床。但近年来在美国卡林型金矿带的一系列找矿新进展说明 ,地层对于成矿的意义不如构造和深源的成矿流体。对于第三纪热点活动、岩浆作用及卡林型金矿形成之间相互关系的新认识 ,为卡林型金矿的找矿突破提供了重要的理论依据。我国滇黔桂、陕甘川等卡林型金矿集中区在许多方面可与美国卡林型金矿对比 ,在找矿方面也应打破单一沿层找矿的旧框框 ,开拓新思路 ,注意在有利的构造部位及有岩浆或深源热液活动的部位找矿。     

Does taxation alter exploration? : The effect of uncertainty and risk

The effect of resource rent taxation on mineral exploration is a controversial issue on which very little research has been carried out. Simple numerical examples are used in this paper to demonstrate that a ‘pure’ resource rent tax, or Brown Tax, can reduce the extent of exploration of a ‘promising’ deposit by a risk averse explorer, but encourage exploration of ‘unpromising’ deposits. This counter-intuitive result is explained in terms of the effect of the tax and of exploration on the costs of risk and uncertainty.     

自然灾害与地质勘探劳动保护

自然灾害和人密切相关,这不仅表现在自然灾害施予的客体是人,人的伤亡和财产损失是自然灾害的标志,而且表现在自然灾害的发生受人类活动的强烈影响。地质勘探活动是人类改造自然获取财富的主要活动之一。它一方面遭受自然灾害的危害,另一方面存在诱发触发自然灾害的危险,自然灾害已成了地质勘探活动的巨大障碍。自然灾害特别是地质灾害(人工诱发触发地质灾害、地方病)和气象灾害的测、报、防、治、救措施和方法研究是地质勘探劳动保护的重要课题。     

平煤十矿发展低碳经济的探索与实践

从2005年起,平煤十矿在充分理解国家政策及低碳经济理论的基础上,提出了＂煤与非煤并重并举＂的发展理念,展开了国有煤炭企业发展低碳经济的探讨与实践,大力发展新能源、低碳技术,打出了加快推动低碳减排、转变增长方式的政策组合拳。     

沈阳市发展低碳经济的探索与实践

对近年来沈阳市发展低碳经济工作的进展情况进行了详尽的论述,介绍了沈阳市发展低碳经济具有的深厚基础以及政策、机制和体制机遇,并从应该建设大浑南低碳发展样板区、实施低碳交通体系建设工程、建设低碳电力供应工程、开展低碳社区建设工程等方面,提出了沈阳市实现低碳发展的战略构想。     

日本在华遗弃化学武器埋藏地调查及其污染处置方法研究

日军二战期间在中国遗弃（留）了大量化学武器,随着埋藏时间的推移,化学武器的弹体腐蚀程度越来越严重,毒气和毒剂泄漏的几率不断增加,因此而造成土壤、水体等环境污染、进而威胁居民生命健康甚至突发性人员伤亡的危险性也在不断加大。本文提出利用低空热红外遥感与三维高密度电法、三维地质雷达等浅层高精度综合物探方法、结合小口径探孔取样...