Interpretation of remote sensing of geological structures and prediction of gold mineralization in Mohe area and its adjacent region

The authors took the ETM ＋ multi-spectra data as the data information and correlation coefficient for each band and carried out their information volume statistics. According to certain criteria, the authors also determined the optimum band-combined image. The image clarity is improved by various enhancements and fusions method. Based on remote sensing geological interpretation in detail, the relationship between remote sens- ing geological characters and gold mine were analyzed systemically. Using all kinds of remote sensing structure information, combining other research data, the authors determined mainly ore-controlling ore structure. Several prospective areas of gold ores were determined and furthermore significant finding mine target areas was confirmed.     

雷州半岛高桥红树林沉积物中砷的分布

采用五态连续提取法(SEP)对雷州半岛高桥红树林群落内外不同深度的沉积物砷含量进行测定.结果表明,高桥红树林湿地0~60cm深处沉积物中除Al-结合态砷和Ca-结合态砷含量低,难以检出外,交换态砷、残渣态砷、Fe-结合态砷皆可检出,沉积物砷积累以残渣态砷和 Fe-结合态砷为主,总砷测定含量为7.34±0.39~10.32±0.48 mg/kg,其中以20~40cm深处沉积物总砷测含量最多;不同深度沉积物砷含量中林内与林区外裸滩呈现不同的分布规律,林外裸滩-林缘-林内的表土总砷含量的分布呈波浪式分布,以林缘为最高,总砷达9.97±1.29 mg/kg,林内显著大于林外裸滩(p值<0.05),林内沉积物对砷的吸附强度较林外裸滩高     

宝清县锅盔山地区多金属矿地质特征分析

宝清县锅盔山地区已开展过1：5万水系沉积物测量、1：2万土壤地球化学测量、1：2万高精度磁法测量、1：2万激电中梯测量及1：2万地质简测工作。现正在使用槽探和钻探工程对异常和矿化蚀变带进行揭露与控制。通过上述工作,大致圈定了区内各类地质体的分布范围,并初步揭示了区内构造和蚀变矿化特征。     

洛古河异常区铅、银矿成因及找矿标志

研究区位于大兴安岭山脉最北端,中俄界河黑龙江南岸,行政区划属黑龙江省漠河县。通过1：5万水系沉积物测量、     

青海鄂拉山地区水系沉积物地球化学特征及找矿方向

为了研究青海省鄂拉山地区找矿远景,基于该区最新一轮1∶5万水系沉积物测量数据,提炼分析其地球化学特征之元素分布特征、元素组合特征、元素异常特征,认为该区主要成矿元素为W,Sn,Mo,Bi,Ag,Cu,Pb,Zn,Au,Sb;并指出该类成矿元素多在元古宙和古生代的地层中明显富集;主要成矿类型为矽卡岩型和热液充填型。结合已知成矿地质条件,最终优选出4个找矿远景区,为该区域提供了较明确的找矿方向。     

Surface sediment diatoms from the western Pacific marginal seas and their correlation to environmental variables

Diatom data of 192 surface sediment samples from the marginal seas in the western Pacific together with modern summer and winter sea surface temperature and salinity data were analyzed.The results of canonical correspondence analysis show that summer sea-surface salinity(SSS) is highly positively correlated with winter SSS and so is summer sea-surface temperature(SST) with winter SST.The correlations between SSSs and SSTs are less positively correlated,which may be due to interactions of regional current pa...     

Preliminary comparison of trace metals in coastal aerosols between Qingdao and Liverpool

Aerosol samples were collected at two coastal suburban stations, Qingdao （China） in 1995-1996 and Liverpool （U.K.） in 1995, respectively. The samples were analyzed to determine the concentrations of trace metals （Cr, Zn, Cu, Co, Ni, Pb, V, and Cd） as well as A1, Fe and Mn. Data were examined to understand the difference of trace metals in aerosols between coastal zones downwind the developing area （near the Yellow Sea） and developed region （near the Irish Sea）. The results show that most elements at Qingdao have levels 4-5 times higher than those at Liverpool, particularly for the crust-dominated elements （e.g. Al, Fe and Mn）. Moreover, the aerosol composition at Qingdao is higher in spring than in summer, underlying the influence of westerlies and local emissions in combination, whereas seasonal change of aerosol composition is not significant at Liverpool. The enrichment factors for the crustal source elements （EFcrust） at Liverpool are much higher than those at Qingdao. The contributions from the pollutant source （Rp） for some trace metals like Cu, Pb, Zn and Cd are 〉90% at Qingdao and Liverpool, suggesting overwhelming anthropogenic contributions to these metals. The contributions from crustal source （Re） for trace metals tend to increase with higher aerosol levels and Al concentration at Qingdao, indicating a good correlation between the crust-dominated component and the air mass. At Liverpool, the Rc values for trace metals are positively correlated with Al concentrations instead of with aerosol mass, suggesting that Al in aerosols represents the crustal component even though the aerosols come from different sources.     

Molecular phylogenetic analysis of attached Ulvaceae species and free-floating Enteromorpha from Qingdao coasts in 2007

Based on the sequence data of the nuclear ribosomal DNA internal transcribed spacer(ITS) 1,5.8 S,and ITS 2,the molecular phylogeny was analyzed on Ulvaceae species collected from Qingdao coasts in summer of 2007,including 15 attached Ulva and Enteromorpha samples from 10 locations and 10 free-floating Enteromorpha samples from seven locations.The result supported the monophyly of all free-floating Enteromorpha samples,implying the unialgal composition of the free-floating Enteromorpha,and the attached Ulvaceae species from Qingdao coasts were grouped into other five clades,suggesting that they were not the biogeographic origin of the free-floating Enteromorpha in that season.     

澳门附近海域沉积物污染状况及特征分析

掌握澳门附近海域沉积物的污染状况及特征,对于合理安排澳门海洋海岸工程疏浚泥的海洋倾倒,防止造成海洋污染有十分重要的意义。根据1997—1999年连续三年对澳门附近主要区域的海洋沉积物采样测定结果,通过分析认为澳门附近海域沉积物污染具有下列特征:1)沉积物中重金属和油类含量普遍较高,除了总Hg外均高于珠江口海区的其他港口;2)沉积物中污染物的分布受人类活动的影响明显,澳门内港受船只排污、码头作业、陆地工业和生活污水排放的影响,是澳门附近海域沉积物污染最为严重区域;3)受水质交换的影响明显,澳门外港、路环岛东北等区域受珠江径流影响水质交换较快,沉积物中污染物的含量较低,而内港由于水质交换较差,沉积物中污染物的含量相对较高;4)与沉积物的成分组成(吸附)有关,大部分污染物与沉积物中粉砂有较好的相关性,表明粉砂对污染物质有较广泛性的吸附能力,尤其是Cu、Zn、Cd、油类、有机质。     

Petroleum Hydrocarbon Distribution Features in Water and Sediment off Fujian Shore

This study on the distribution features of petroleum hydrocarbon in water and sedi-ment off the Fujian shore using data obtained from the baseline research on oceanic contamination in Fujian showed that:during the research preiod,petroleum hydrocarbon concentrations in water varied from 5.77μg/L to 37.28μg/L,averaged 14.48 μg/L;was lower in the wet seasson than in the dry season;and was highest in the Minjiang Estuary and Jiulong Estuary in both seasons ,The petorleum hydrocarbon concentrations in shore sediment varied from 14.48 mg/kg to 784.36 mg/kg,averaged 133.3 mg/kg ,and was closely related to sediment types (granularity).