Digital Lithogeochemical Map of Bavaria 1:25,000 (dLGK25) — WMS

The digital lithogeochemical map of Bavaria 1:25 000 (dLGK25) is a thematic map on an overview scale. With regard to the delimitation of the units, it is derived directly from the current state of the digital geological map of Bavaria (dGK25), according to the approach of an integrated mapping. The map image shows the main geological units combined into lithogeochemical units (LGE), which are located near the surface below the ground zone (surface map). A lithogeochemical unit is composed of geological units which, within a defined geological period, had similar conditions of formation and thus predicted a characteristic chemical composition. A total of 184 LGEs are distinguished for Bavaria, in which up to three different lithologies (fixed rocks) or grain size fractions (locker rocks) are distinguished. The dataset contains statistical parameters (50th and 90th respectively. Percentile equivalent to median and background value) of the investigated elements (main, secondary and trace elements; measured with X-ray fluorescence analysis (RFA) or mass spectrometry with inductively coupled plasma (ICP-MS) in the differentiated LGE. For statistical evaluation, a sample number of more than 10 is required. While for the characterisation of the span distribution in the geochemical units a high number of samples distributed as much as possible would be ideal, there are often rather small sample numbers and/or spatially unequal distributions of the sampling points, which could lead to corresponding corrections in the spans in case of post-compression. The stated percentiles are always to be seen as an indication of the range of element concentrations within the geochemical units and thus do not provide any indication of the specific values to be found at a location. As far as possible, only representative rock samples of the units were taken into account for the evaluations, so that local peculiarities such as veins are usually not included. The accuracy of the representation depends on the geological conditions, it is at best 25 m according to the processing scale and is therefore generally not accurate. From the digital lithogeochemical map (dLGK25) no parcel-sharp statements or concrete indications of deeper rocks and geochemical properties can be derived directly. At the specific location, the rock or its expression may differ from the underlying conditions. The technical data correspond to the current state of data and knowledge of the Bavarian State Office for the Environment. No guarantee can be given for the completeness and correctness of the information provided. Maximum image size: 4096x4096Pixels.巴伐利亚1:25000数字岩石地球化学图（digital lithogeochemical map of Bavaria 1:25 000，简称dLGK25）是一幅概览比例尺的专题地图。其单元划分直接源自巴伐利亚数字地质图（dGK25）的现行版本，采用一体化填图方法编制。图面展示的是合并为岩石地球化学单元（lithogeochemical unit, LGE）的主要地质单元，这些单元位于地表下方近地表带（地表填图范畴）。岩石地球化学单元由在特定地质时期内形成条件相似、因此具备特征性化学成分的地质单元组成。巴伐利亚地区共划分出184个LGE，每个单元可区分至多3种不同岩性（固结岩石）或粒度组分（固结岩石）。本数据集包含经区分的LGE中所调查元素（主量、次要和微量元素）的统计参数——分别为第50和第90百分位数，对应中位值与背景值，上述元素采用X射线荧光分析（RFA）或电感耦合等离子体质谱法（ICP-MS）测定。统计评估需满足样本量大于10。尽管若要精准表征地球化学单元的浓度分布跨度，理想状态下应采用数量充足且空间分布均匀的样本，但实际工作中常面临样本量偏小、采样点空间分布不均的问题，若后续进行数据压缩处理，可能会对跨度参数造成相应修正。此处给出的百分位数仅用于反映地球化学单元内元素浓度的分布范围，无法用于推断某一具体点位的元素含量数值。评估过程中仅尽可能选取单元的代表性岩样，因此通常不会纳入脉体等局部异常特征。图面表达的精度取决于地质条件，根据成图比例尺，其最高精度可达25米，因此整体精度有限。无法直接从巴伐利亚数字岩石地球化学图（dLGK25）获取精确到地块的具体结论，或推断深部岩石与地球化学属性。在特定实地点位，实际岩石及其地球化学表现可能与图面反映的地下地质条件存在差异。本数据集的技术参数符合巴伐利亚州环境局现行的数据与知识体系，不对所提供信息的完整性与准确性作出任何保证。最大图像尺寸：4096×4096像素。