利用微区XRF技术的大洋固体矿产成分快速无损检测   总被引：1，自引：0，他引：1  

林梵宇  尹希杰  黄威  黄杰超  梁毓娜 《海洋地质与第四纪地质》2021,41(1):223-232

深海固体矿产主要由铁锰结核、富钴结壳和多金属热液硫化物组成,元素在矿产中原位的分布和含量,对了解矿物成因、品位以及评估其经济价值有重要指示作用.本研究利用微区XRF分析技术对铁锰结核、富钴结壳、热液硫化物3种大洋类型矿产样品,进行高分辨、原位和无损的多元素空间分布检测,结果显示了不同元素在3种类型矿物中的空间分布特征....  相似文献   

Effect of rhizobia inoculation on the seed (herbage) production of mungbean (Phaseolus aureusRoxb.) grown at Uzbekistan     

N.A. Provorov  U.B. Saimnazarov  I.U. Bahromov  D.Z. Pulatova  A.P. Kozhemyakov  G.A. Kurbanov 《Journal of Arid Environments》1998,39(4):569-575

In field trials conducted at Uzbekistan, inoculation of mungbean (Phaseolus aureusRoxb.) with commercial strain CIAM1901 ofBradyrhizobiumsp. (Phaseolus) increased (on average for two cultivars) the herbage mass by 46·6±6·0%, seed mass by 39·2 ± 3·6%, mass of 1000 seeds by 16·0 ± 0·8%, nitrogen content in seeds by 58·3 ± 8·9%, starch content in seeds by 30·0 ± 5·5% and number of nodules by 254%. Inoculation with this strain produced the same herbage (seed) mass as NH₄NO₃application (120 kg ha⁻¹of N), while the combined treatment of rhizobia and 60 kg ha⁻¹of N produced significantly higher yields than rhizobia inoculation alone or application of 120 kg ha⁻¹of N. The rhizobia strain M11 was isolated from Uzbekistan soils and significantly exceeded the commercial strain CIAM1901 in its influence on herbage mass by 3·9–10·6%. Two-factor analysis of variance demonstrated that the herbage mass and number of nodules are controlled mainly by the rhizobia strain genotypes, while seed yield, number of pods, mass of 1000 seeds and N and starch content in seeds are influenced by the plant cultivar genotypes.  相似文献   

Study on the cation substitution capacity of synthetic 1nm manganate     

Qian Jiangchu  T. A. Mellin 《海洋学报(英文版)》1996,15(3):345-354

Ｓｔｕｄｙｏｎｔｈｅｃａｔｉｏｎｓｕｂｓｔｉｔｕｔｉｏｎｃａｐａｃｉｔｙｏｆｓｙｎｔｈｅｔｉｃ１ｎｍｍａｎｇａｎａｔｅ￥ＱｉａｎＪｉａｎｇｃｈｕ；ａｎｄＴ．Ａ．Ｍｅｌｌｉｎ（ＳｅｃｏｎｄＩｎｓｔｉｔｕｔｅｏｆＣｈｅａｎＷｒａｐｈｙ．ＳｔａｔｅＣｋｅａ...  相似文献   

Geochemical characteristics of sediments from the COMRA registered pioneer area (CRPA), equatorial northeastern Pacific Ocean   总被引：1，自引：0，他引：1  

Ni Jianyu  Zhou Huaiyang  Pan Jianming  Zhao Hongqiao  Hu Chuanyu  Wang Fangguo 《海洋学报(英文版)》2001,20(4):553-561

I\TRODUcrIO\Most substances that enter the oceans are ultimately kept as sediments. ffefore settingdOwn, they experienced vdrious complex biological and chebocal cycles and interactions, whichinvolve sorne substances more than others. The interactlons continue after deposition. Sedl-ments do not lie passive]y on the sea--floor until they are buried: deeP--sea animals disturb thesediments as they forage fOr fdri, and some sediments may experience erosion and resuspensionby bottom currents. …  相似文献   

南海铁锰结核(壳)的地球化学特征   总被引：1，自引：0，他引：1  

何良彪 《海洋科学进展》1991,(4)

本文研究了南海中部铁锰结核(壳)的地球化学特征。南海铁锰结核(壳)以高Mn富Ni为特征。但不同沉积部位的铁锰结核(壳),化学成分也有一定的差异,这是受不同沉积区的物源特性,地化环境差异和沉积成矿过程中环境的变化所影响的结果。  相似文献   

Formation particularities of hypergene ferromanganese nodules: Far East Russia and Vietnam     

V. M. Novikov  E. L. Shkol’nik  E. A. Zhegallo  V. K. Orleanskii 《Russian Journal of Pacific Geology》2008,2(5):422-432

Ferromanganese nodules (pisolites) form accumulations in basal layers of Pliocene-Quaternary clayey sections of Far East Russia and Vietnam. They are composed of minerals that are in common for both these regions (authigenic vernadite, feroxyhyte, goethite, halloysite, and terrigenous quartz) and minerals that are characteristic of either the northern (authigenic hollandite, lithiophorite, and bernessite) or southern (authigenic alumophorite, lepidocrocite, ferrihydrite, gibbsite, and terrigenous ilmenite) regions. Pisolites are considered to be microbial colonies with Mn and Fe oxides frequently forming biomorphs. The growth of the colonies was accompanied by dying off and mineralization of microorganisms successively from the central toward the peripheral parts of the nodules. The formation of metalliferous pisolites was linked to the oxidizing geochemical barrier developed at the interface between compact sedimentary clays and the underlying porous readily permeable weathered products of basalts.  相似文献   

Exploration of polymetallic nodules in the Area: Reporting practices,data management and transparency     

《Marine Policy》2016

The International Seabed Authority (ISA) regulates the activities related with the exploration and exploitation of seabed mineral resources in the Area, which are considered as the "common heritage of mankind" under the United Nations Convention on the Law of the Sea. The ISA has also the mandate to ensure the protection of the marine environment. The development of good practices for the annual reporting and data submission by Contractors is crucial for the ISA to comply with the sustainable development of the mineral marine resources. In 2015, the ISA issued a new template for reporting on exploration activities, which includes the definition of the format for all geophysical, geological and environmental data to be collected and analysed during exploration. The availability of reliable data contributes to improve the assessment of the ISA on the activities in the Area while promoting transparency, which is considered as a major principle of industry best practices.  相似文献   

Manganese nodule morphology as indicators for oceanic processes in the Central Indian Basin     

《International Geology Review》2012,54(1):27-44

In order to understand the role of geological features in the depositional environment and the prevailing oceanic processes on the formation and characteristics of manganese nodules, a detailed morphological study of the manganese nodules was undertaken on 23,000 nodules from 194 locations (including 801 substations) in a nodule‐rich area covering about 150,000 km² in the Central Indian Basin (CIB). Nodules with rough surface texture dominate most of the area except the south‐eastern part of the basin, which is floored more by the smooth nodules. Smaller nodules (<4 cm) are common and are dominant both in density and mass in the south‐eastern part of the basin, whereas the north‐western part and the central part show dominance of larger rough nodules with higher density and mass. Smooth nodules are also found at shallower depth (<5000 m), on the seamount tops and along the slopes, whereas the rough nodules mostly occur in deeper areas. Significantly, the eastern part of the basin show smooth nodules with smaller size. Smooth nodules >4 cm diameter are rare and show low oxide layer thickness and low bio‐sediment remnants compared to rough surfaced nodules. Large variation in morphological types of nodules are found in the CIB with spheroidal, oblong, triangular, rounded, sub‐rounded or irregular shapes, with irregular nodules being most common. The most common nucleus is altered basalt, while pumice, shark teeth, clay and older nodule nuclei are also present. Water currents and seafloor topography seem to play a major role in defining the nodule morphology. Results of the study show the abundance of smaller nodules with smooth surface texture towards the eastern side of the study area. These features are probably responding to bottom current activity. Inasmuch as the eastern part of the study area is closer to saddles in the Ninety East Ridge (which is the entry point of the Antarctic Bottom Water (AABW) currents into the CIB), the influence of AABW is reflected in the shape and size of the nodules in this area.  相似文献   

肺脂肪栓塞综合征的X线及螺旋CT诊断     

齐荣秀  梁振华 《CT理论与应用研究》2013,(3):531-535

目的:探讨肺脂肪栓塞综合征的X线及CT特点。方法:回顾性分析8例被诊断为肺脂肪栓塞患者的影像资料,由两位放射科医师对患者的胸部X线片及多层螺旋CT图像进行评价。结果:行X线片扫描5例表现为双肺弥漫性分布的片状密度增高影,2例表现为双肺中下野分布为主的片状阴影,1例仅表现为肺纹理增强。行CT检查5例表现为磨玻璃样改变(3例弥漫性分布、1例呈"地图样"片状分布、1例合并肺小叶间膈增厚呈现网状阴影),3例表现为多发实变影或结节影,2例合并有双侧胸腔积液。结论:X线平片仍是诊断肺脂肪栓塞比较可靠的影像学检查方法,螺旋CT能够提供更多特征性的影像信息。  相似文献   

COPD急性发作期中医证型相关因素研究          下载免费PDF全文

孙宸伟  彭屹峰  王一花 《应用海洋学学报》2021,37(6):8

目的：探究急性发作期慢性阻塞性肺疾病（COPD）中医证型的相关因素。方法：将200 例急性发作期COPD患者分为痰浊壅肺证、痰热蕴肺证、痰瘀阻肺证、肺肾气虚证,记录患者性别、年龄、病程等信息,进行肺功能等相关检查,并由患者本人填写COPD评估测试（CAT）,根据所收集的资料分析中医证型与年龄、病程的关系,CAT评分与第1秒用力呼气容积（FEV1）、FEV1/用力肺活量（FVC）的关系、中医证型与CAT评分的关系。结果：在患者平均年龄、平均病程、CAT评分方面,痰浊壅肺证、痰热蕴肺证与痰瘀阻肺证、肺肾气虚证比较,差异均有统计学意义（P＜0.001）。CAT评分与第1秒用力呼气容积占预计值百分比（FEV1%pred）、FEV1/FVC%之间存在负相关。结论：急性发作期COPD患者的年龄、病程、CAT评分以及肺功能在各中医证型中存在差异,CAT评分可为中医辨证分型提供依据。  相似文献