G-BASE (Geochemical Baseline Survey of the Environment) for south west England - stream sediments and shallow (5-20cm) soils
收藏www.data.gov.uk2024-12-08 更新2025-01-21 收录
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https://www.data.gov.uk/dataset/cdca725a-ff58-4025-8af5-498c93df2901/g-base-geochemical-baseline-survey-of-the-environment-for-south-west-england-stream-sediments-and-shallow-5-20cm-soils
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资源简介:
The G-BASE programme involves systematic sampling and the determination of chemical elements in samples of stream sediment, stream water and soil, to build up a picture of the surface chemistry of the UK. G-BASE for SW England is the most recent area of the UK sampled by this on-going project The average sample density for stream sediments is approximately one site per 2km square. Density for soils in SW England is variable across the area, ranging from 1 per 2km square to one per 5km square, depending on underlying parent material. Analytical precision is high with strict quality control to ensure countrywide consistency. Results have been standardised to ensure continuity with existing G-BASE geochemical data. The data provide baseline information on the natural abundances of elements, against which anomalous values due to such factors as mineralisation and industrial contamination may be compared. Analytical data for the sub150 microns fraction of stream sediment and the sub 2mm fraction of soil samples are available for some or all of: Ag, Al, As, Ba, Bi, Br, Ca, Cd, Ce, Cl, Co, Cr, Cs, Cu, Fe, Ga, Ge, Hf, I, In, K, La, Mg, Mn, Mo, Na, Nb, Nd, Ni, P, Pb, Rb, S, Sb, Sc, Se, Si, Sm, Sn, Sr, Ta, Te, Th, Ti, Tl, U, V, W, Y, Yb, Zn, and Zr.
G-BASE项目涉及对溪流沉积物、溪流水和土壤样本的系统抽样以及化学元素的测定,旨在构建英国地表化学的总体图景。针对西南英格兰的G-BASE项目是此项持续进行的项目中最新采集的区域。溪流沉积物的平均样本密度约为每2平方公里一个采样点。西南英格兰土壤的密度在该区域内有所变化,从每2平方公里一个采样点至每5平方公里一个采样点不等,具体取决于基础母质。分析精度高,并通过严格的质量控制确保全国范围内的数据一致性。结果已标准化,以确保与现有的G-BASE地球化学数据保持连续性。这些数据提供了元素自然丰度的基线信息,可用于与因矿化、工业污染等因素引起的异常值进行比较。对于溪流沉积物中150微米以下和土壤样本中2毫米以下的部分,部分或全部以下元素的分析数据均可用:Ag(银)、Al(铝)、As(砷)、Ba(钡)、Bi(铋)、Br(溴)、Ca(钙)、Cd(镉)、Ce(铈)、Cl(氯)、Co(钴)、Cr(铬)、Cs(铯)、Cu(铜)、Fe(铁)、Ga(镓)、Ge(锗)、Hf(铪)、I(碘)、In(铟)、K(钾)、La(镧)、Mg(镁)、Mn(锰)、Mo(钼)、Na(钠)、Nb(铌)、Nd(钕)、Ni(镍)、P(磷)、Pb(铅)、Rb(铷)、S(硫)、Sb(锑)、Sc(钪)、Se(硒)、Si(硅)、Sm(钐)、Sn(锡)、Sr(锶)、Ta(钽)、Te(碲)、Th(钍)、Ti(钛)、Tl(铊)、U(铀)、V(钒)、W(钨)、Y(钇)、Yb(铒)、Zn(锌)和Zr(锆)。
提供机构:
British Geological Survey (BGS)



