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1.
南海中部表层沉积物的元素地球化学   总被引:8,自引:0,他引:8  
张富元 《海洋与湖沼》1991,22(3):253-263
根据1983年9月—1984年7月所调查的南海中部91个表层沉积物中Fe,Mn等18种元素分析并结合其它资料的详细研究结果表明:(1)南海中部沉积物具有在近海—深海环境下形成的半深海沉积物的地球化学特征;(2)元素含量分布规律是,Al,K,Fe,Mg,Cu,Ce,Ni,Ba,Mn,Zn,Pb,N含量从陆架外缘到陆坡直至深海递增;Ca,Sr,C_(有机)从陆架外缘到陆坡含量渐增,由陆坡向深海锐减;Si和Ti含量在陆坡低、陆架外缘和深海高;(3)因子分析得出三种元素组合,即常量元素Al,Si,K,Fe,Mg,Ti,微量元素Cu,Co,Ni,Mn,Ba和Ca,Sr,C_(有机),N组合;(4)沉积物元素组成和含量的主要控制因素是沉积物类型。  相似文献   

2.
本文测定了取自黄海南部和东海北部的某些表层沉积物主要元素的含量。根据主要元素的丰度、概率分布及其共生组合得到下列结果:1.A1、Fe、Mg,Na、K的高含量分布地区与粘土沉积物相一致。Si的高含量区与砂质沉积相一致.Ca的高含量区与生物碎屑沉积物相一致:2.A1与K、Mg、Na、Fe呈正相关.Mg与Fe之间,Si,P和A1之间也是正相关,Ca和Mn与A1没有明显的关系;3.沉积物中A1、Fe、Mn、Mg、Na、K和P的含量随着远离海岸和海水深度增加趋于降低,Ca的变化没有规律.相反,在东海北部随着水深Ca含量增加,而Si与水深没有明显关系:4.黄海沉积物来源于黄河,东海北部沉积物来自长江。  相似文献   

3.
本文对黄海中南部10个沉积物样品和东海北部24个沉积物样品用等离子光谱做了Ba,Be、Co、Cr、Ga、Li、Mn、Nb、Ni、P、Pb,Sr、V、Zn、Y和Yb的分析,并对该区沉积物中元素的丰度和不同类型沉积物中微量元素的分布规律做了研究。通过对区内微量元素与主要元素的相关图解分析表明,大多数微量元素与主要元素Al、Mg、K呈正相关,其高值区与粘土沉积物相一致,低值区与粉砂质沉积物相吻合;Be、Sr、Mn的高含量与粘土沉积物无关、  相似文献   

4.
本文测定了取自黄海南部和东海北部的某些表层沉积物主要元素的含量.根据主要元素的丰度、概率分布及其共生组合得到下列结果: 1.Al、Fe、Mg、Na、K的高含量分布地区与粘土沉积物相一致.Si的高含量区与砂质沉积相一致.Ca的高含量区与生物碎屑沉积物相一致; 2.Al与K、Mg、Na、Fe呈正相关.Mg与Fe之间,Si、P和Al之间也是正相关,Ca和Mn与Al没有明显的关系; 3.沉积物中Al、Fe、Mn、Mg、Na、K和P的含量随着远离海岸和海水深度增加趋于降低,Ca的变化没有规律。相反,在东海北部随着水深Ca含量增加,而Si与水深没有明显关系; 4.黄海沉积物来源于黄河,东海北部沉积物来自长江。  相似文献   

5.
本文对黄海中南部10个沉积物样品和东海北部24个沉积物样品用等离子光谱做了Ba、Be、Co、Cr、Ga、Li、Mn、Nb、Ni、P、Pb、Sr、V、Zn、Y和Yb的分析,并对该区沉积物中元素的丰度和不同类型沉积物中微量元素的分布规律做了研究。通过对区内微量元素与主要元素的相关图解分析表明,大多数微量元素与主要元素Al、Mg、K呈正相关,其高值区与粘土沉积物相一致,低值区与粉砂质沉积物相吻合;Be、Sr、Mn的高含量与粘土沉积物无关  相似文献   

6.
东北太平洋中国合同区悬浮颗粒物元素地球化学   总被引:1,自引:0,他引:1  
利用ICP-MS对东北太平洋中国合同区3个测站分层采集的悬浮颗粒物的元素组成进行了测试,对Na、Mg、Al、Ca、Ti、Mn、Fe、Co、Cu、Sr、Ba和Pb等12种元素的含量分布及其地球化学特征进行了研究和对比。结果表明,水体中悬浮体总量(TSM)一般低于0.3mg/dm3,12种元素含量从几百到不足0.01μg/dm3。其分布以500和5000m为界可分为3层。元素中Al和Ti可作为陆源元素指标,Sr和Ba可作为生源元素指标,Pb主要来源于人类活动。在西区,Na、Mg和Ca主要为生源元素,Mn、Fe、Co和Cu主要为陆源元素。在东区,Na、Mg和Cu为多源元素,Ca、Mn、Fe和Co以陆源为主。颗粒物物源及供应量是颗粒物和元素含量分布的控制因素。西小区海底火山活动强烈是影响两区元素组分差异的直接因素之一。  相似文献   

7.
冲绳海槽北端表层沉积物过渡元素地球化学特征   总被引:4,自引:0,他引:4  
利用原子吸收和等离子发射光谱等方法,对冲绳海槽北端184个表层沉积物中的Al和过渡元素(Ti、Cr、Mn、Fe、Co、Ni、Cu、Zn和Zr)进行了化学分析。结果表明,由于受生源碎屑稀释作用的影响,过渡元素在陆架砂质区含量较低,其分布呈北西-南东向舌状延伸;由于细粒组分的增加,在陆架细粒沉积区和海槽区过渡元素含量较高。Mn主要在海槽区富集,在陆架和陆坡区变化不大。除了Mn之外,Al和其他过渡元素均呈明显正相关。Al/Ti比值与陆壳平均值接近,说明二者主要来源于陆源碎屑。Mn/Fe比值与邻近海区沉积物类似,但在陆架区CaO含量大于20%的沉积物和海槽区沉积物中相对较高,这分别是生物富集作用和自生沉积的结果。过渡元素富集因子分析结果表明,研究区过渡元素部分来自于黄河、部分来自于长江物质。  相似文献   

8.
渤海湾西部表层沉积物悬移组分元素特征及物源意义   总被引:2,自引:0,他引:2  
对渤海湾西部海底表层沉积物样品粒径小于0.063mm的悬移组分进行16种元素测试,分析了各元素特征及分布规律。元素平均丰度与黄土及渤海泥质沉积物基本一致,说明渤海湾西部表层沉积物悬移组分的物源主要与黄河源区黄土高原的黄土有关。研究区16种元素可分为两类,I类是Sc、Co、Fe、V、Al、Ca、Mg、Th、U、Cr;II类是Zr、Hf、Ba、Na、Sr、K。同类元素丰度的平面分布规律相似,呈现正相关性;异类元素丰度的平面分布规律相反且呈负相关性。研究区主要分为两个地球化学分区,两区基本以北纬39°05′线为界,I区位于南部和中部,以高Sc、Co、V、Th、U、Cr、Fe、Al、Mg、Ca等I类元素为特征;而II区位于北部,以高Zr、Hf、Ba、Sr、Na、K等II类元素为特征。渤海湾西部表层沉积物悬移组分的元素特征及分区,可能与研究区内不同季节沿岸环流方向改变,进而导致不同物源母质沉积物输运混合作用有关。  相似文献   

9.
黄海沉积物地球化学分析   总被引:17,自引:2,他引:15  
海洋沉积物地球化学研究,国外学者以往多集中于深海大洋;近年已逐渐对大陆架浅海引起注目。黄海是一个有代表性的半封闭型的陆架浅海,查明其地球化学特征将具有一定的意义。我们对比较均匀分布的62个表层沉积物样品进行了12种化学元素的分析,这些元素是Fe,Mn,Ti,P,Si,Cu,Co,Ni,Zn,Cr,Li和Vo Fe,Mn,Ti,P采用分光光度法测定;Cu,Co,Ni,Zn,Cr,Li采用原子吸收分光光度法测定;V采用发射光  相似文献   

10.
青藏高原东北部黄土沉积化学风化程度及古环境   总被引:14,自引:1,他引:14  
通过对青藏高原东北部西宁盆地大墩岭剖面24种常微量元素的测定及数据的处理分析,研究了该地区黄土沉积的化学风化程度及某些地球化学特征。相对上部陆壳(UCC)元素平均值,大墩岭剖面显著富集Ca、Mg、Ti、V、Cr、Ni、Y、Zr等,而亏损Si、Al、K、Na、Sr、Nb等;相对于中国黄土(CL)元素平均值,大墩岭剖面明显富含Fe、Ca、Mg、K、Ti、Cr、Mn、Cu、Rb、Sr、Nb、Ba和P,而Si、Na、Co、Ni、Pb则表现为亏损;在UCC标准化图与CL标准化图中,大墩岭黄土与古土壤变化趋势基本一致。大墩岭剖面尚处于脱Ca、Na的大陆风化初期阶段。与其他地区的风尘沉积相似,大墩岭黄土沉积很可能也起源于上部陆壳,但不排除物源存在一定差别。风尘堆积时该区的气候环境比黄土高原要干冷,这与青藏高原第四纪以来的强烈隆升有直接关系。  相似文献   

11.
长江与黄河沉积物元素组成及地质背景   总被引:48,自引:2,他引:46  
长江与黄河表层沉积物常量及微量元素组成特征明显不同。长江相对富K、Fe、Al等常量元素及绝大多数微量元素,且元素含量变化大;而黄河相对富Ca、Na、Sr、Ba、Th、Zr、Hf等少数元素,元素含量变化较小;长江流域广泛分布的中酸性岩浆岩及复杂的源岩与强烈的化学风化作用决定了长江沉积物的特征元素组成及元素含量变化大的特点;而黄土高原的黄土化学成分与强烈的物理风化作用决定了黄河沉积物的特征元素组成。Cu、Zn、Sc、Ti、Fe、V、Ni、Cr、Co、Be、Li等元素可较好地用来区分长江与黄河沉积物,以探索长江与黄河的入海物质在海域中的混合及扩散问题  相似文献   

12.
Using a neutron activation analysis technique, which involves gamma-spectrometry with a Ge(Li) detector coupled to a S40 multichannel analyzer and interfaced to a PDP-11 computer, we determined thirty-eight elements in sediments from the lower reach (downstream from Jinan) and estuary of Huanghe. The results are discussed in this paper.From inter-elemental correlations, it ts found that a large number of metals (Mn.As, Co, Cr.Cs, Rb, Sc, Ti, Ta, V and Zn) correlate positively with Fe. Ba and Ca correlate positively with Al. Whereas some elements (e. g. , Ti and lanthanides) show no correlation with either Fe or Al. On the other hand, Hf and Zr show a negative correlation with Fe. Elements which tend to be scavenged by Fe and Al colloids or suspended particles are enriched in sediments at the Huanghe Estuary relative to its lower reach. On the other hand, the contents of some elements (e. g. , Zr,Hf,U, Ba, etc. )are higher in sediments from the lower reach of Huanghe than in the estuarine sediments,which  相似文献   

13.
Deep-sea sediment cores ranging up to 30,000–80,000 yrs in age were taken from a southern region of the Japan Sea and subjected to analyses for 5 major and 11 trace elements by means of instrumental photon activation analysis with 30 MeV bremsstrahlung. These elements were Ca, Fe, Mg, Na, Ti, Ba, Ce, Co, Cr, Mn, Nb, Ni, Rb, Sr, Y and Zr. Additionally, Al was determined spectrophotometrically. Distribution patterns of these elements with depth in the sediment columns were derived. Enrichments of Ca and Sr by biogenous process were observed; these Ca maxima are well correlated with Mn maxima. Below the Holocene—Pleistocene boundary, continuous transportation of poorly degraded continental debris, which was low in metallic constituents, was noted. A distinct enrichment of the top layer of the sediments in Mn was observed. This is the result of post-depositional upward migration of Mn. Fe, Co and Ni were also enriched in the top layers. In the central part of the basin, the oxidized post-glacial zone appears to be a typical pelagic sediment.  相似文献   

14.
红树植物红海榄叶化学组成研究   总被引:4,自引:0,他引:4  
对红树植物红海榄叶的基本化学成分水分,灰分,灰分中酸不溶物,灰分中S(SO42-),粗蛋白,粗脂肪等及氨基酸和微量元素的组成和含量进行了系统的分析测定。其基本化学组成各成分含量分别为:水分(69.18%),灰分(3.04%),灰分中酸不溶物(0.094%),灰分中S(SO42-)(0.052%),粗脂肪(7.75%),粗蛋白(7.14%);测得了红海榄叶中17种氨基酸,其总含量为10.7mg/g,其中人体必须氨基酸有7种,占所含氨基酸总量约26%;采用全谱直读等离子体原子发射光谱仪对红海榄叶进行了31种微量元素的分析测定,测得了其中18种元素的含量,红海榄叶中含有丰富的人体必须的矿物质元素。  相似文献   

15.
Suspended matter was collected at 30 stations in the Baltic and Kattegatt, at the thermocline and at the bottom, and analysed for Na, Ca, Mg, Si, Ti, Al, Fe, Mn, Ba, Sr, Ni and V. The composition of the suspended matter varies considerably, but can be described as a mixture of: (1) 12–25% terrigenous detritus with much Si, Al, Ti and Fe; (2) 75–88% biological matter with much Ni, V and Ba; and (3) some Mn-oxyhydroxide.The annual efflux of water from the Baltic is about 460 km3, with a suspended load in the Baltic straits of ~1.2–3.6 mg ash material l?1 These values imply that much Si, Ti, Al, Fe, Sr, Ni and V and particularly much Ba and Mn are lost from the Baltic in the suspended load.The average suspended matter is richer in Mn(5×), Ba(2.5×), Sr(4×) and V(1.8×) than permanently depositing Baltic sediments. These constituents are relatively enriched in pelagic deposits, i.e. it is likely that much Mn, Ba and V in deep-sea sediments derive from the continents via suspended transport. This conclusion is supported by the similarity between suspended matter and average Atlantic pelagic sediment.  相似文献   

16.
珠江口底质常、微量元素分析结果表明, 富含Si、Al、K、Mg、Fe和Ti等元素的陆源物质构成本区沉积物主体, 主要元素氧化物平均含量分别为SiO261.16%, Al2O314.74%, Fe2O35.72%, TiO20.88%, MgO1.84%, K2O2.63%, CaO2.70%, CaCO34.79%。底质元素含量与沉积物粒度组成关系密切, 主要元素Al2O3、MgO、Fe2O3、TiO2以及微量元素Cu、Pb、Zn、Cr、V、Co、Ni、Ba在西北部近岸区以及伶仃洋中部细颗粒沉积区内富集; 而SiO2、CaO、Zr、Sr则在西南部和东南部粗颗粒沉积区富集。控制本区沉积物地球化学特征的因素主要有物质来源、沉积环境、水动力条件、沉积物粒度、矿物组成以及元素自身地球化学性质等。  相似文献   

17.
Two cores recovered in the eastern Mediterranean were analysed for major, minor and trace elements. The primary chemical composition of the sediment is different at each location, probably because the lithological sources and the relative biogenic contributions differ.

Carbonates are important for the concentration of Ca, Mg and Sr, whereas aluminosilicates determine the concentration of Si, Al, K, Li, Y and Be, and to a lesser extent that of Fe, Cr, Ti, Mg, Zn and Zr. In sapropels, organic carbon and sulphur seem to be closely related. Bromine, Mo, P, Fe, V, Cu, Zn, Co, Ni and Cr are closely associated with organic and sulphidic compounds. The concentration versus depth profile for organic carbon in two sapropels points to a rapid establishment of conditions that gave rise to sapropel formation, followed by a gradual transition back to “normal” conditions.

The primary composition is overprinted by diagenetic processes. Sulphate-reducing conditions occurred during and just after sapropel deposition. A progressive oxidation front mechanism, which became active after sapropel deposition, is responsible for additional major geochemical changes. This diagenetic phenomenon has strong implications for the chemistry of Fe, Mn, Ni, Co, Zn, Cu, Cr, V, U, As and Sb.  相似文献   


18.
Phosphorus and metals bound to organic matter were separated from coastal sediments of Harima Sound in Seto Inland Sea, Japan by extraction with NaOH and fractionated by Sephadex G-25 chromatography. Phosphorus and metals were determined in the eluates by a multi-channel, inductively coupled plasma-atomic emission spectrometer. Phosphorus and Cu, Zn, Fe, Mn, Ni, Cr, Co and Ti bound to organic matter with high molecular weights (OMHMW) (MW ? 5000) were found to be present in the sediments, but no Mo or V were found. The technique provides minimum estimates of the amounts of P and metals bound to organic matter. These organic complexes show surface enrichment in a sediment core (0–20 cm) and their contents decrease with depth. Also, the amounts of eighteen elements, namely: P, Fe, Mn, Zn, Cu, Si, Al, Ti, Pb, Co, Ni, Cr, Mo, V, Na, K, Ca and Mg, in H2O, ammonium acetate at pH 7 and 5, hydrogen peroxide, hydroxylamine hydrochloride and hydrogen fluoric acid soluble fractions have been determined with a selective chemical leaching technique for the 210Pb-dated sediment core sample. Considerable amounts of P (6–19%) and Cu (5–21%) were associated with organic matter, in contrast to other metals such as Fe, Mn, Zn, Ni, Cr, Co and Ti which were associated with sulfide and silicate.  相似文献   

19.
南海铁锰结核(壳)的元素地球化学研究   总被引:1,自引:0,他引:1  
本文利用南海11个铁锰结核(壳)样品的化学分析资料,研究了铁锰结核(壳)中Fe,Mn,Cu,Co,Ni,Pb,Zn,Cr,K,Na,Ca,Mg,Si,P,Al,Ti,Sr,Ba及∑REE的元素地球化学特征。结果表明:(1)铁锰结核(壳)以高Fe,∑REE,低Mn,Cu,Co,Ni等元素为主要特征;(2)铁锰结核(壳)中Fe,Mn间无明显相关,而Fe与∑REE,∑Ce,∑Y呈弱的正相关,Mn与∑REE,∑Ce,∑Y呈明显的正相关,结壳中Fe,Mn与Si,Al,Cu Co Ni呈负相关;(3)结核(壳)中Mn/Fe与Cu/Ni,Ce/La呈负相关,Mn/Fe主要受Mn控制;(4)结核(壳)中Fe,∑REE等元素主要来自南海陆源中酸性岩类的风化、淋滤和沉积。  相似文献   

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