The new global lithological map database GLiM: A representation of rock properties at the Earth surface
The new global lithological map database GLiM: A representation of rock properties at the Earth surface
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DOI：
10.1029/2012gc004370
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发表时间：
2012-12-07
影响因子：
3.5
通讯作者：
Moosdorf, Nils
中科院分区：
文献类型：
--
作者：
Hartmann, Jens;Moosdorf, Nils
岩石学描述岩石的地球化学、矿物学和物理性质。它在地球表面的许多过程中发挥着关键作用，特别是物质向土壤、生态系统、河流和海洋的流动。要在全球范围内理解这些过程，需要高分辨率的岩性描述。在区域文献的帮助下，将已有的区域地质图转化为岩性信息，编制了新的高分辨率全球岩性图(GLIM)。胶片用1,235,400个多边形代表了地球表面的岩石类型。岩性分类由三个层次组成。第一级包含16个岩性类别，可与以前在全球岩性图中应用的定义相媲美。另外两个级别分别包含12个和14个子类，它们描述了更具体的岩石属性。根据浮光层，地球上覆盖着%的沉积物(其中三分之一是碳酸盐)，13%的变质岩，7%的深成岩，6%的火山岩，10%被水或冰覆盖。胶片的高分辨率使人们能够观察到经常与全球平均水平不同的区域岩性分布。GLIM能够在全球范围内对地球表面过程进行区域分析。GLIM的网格版本可在盘古数据库(http://dx.doi.org/10.1594/PANGAEA.788537).)上找到
Lithology describes the geochemical, mineralogical, and physical properties of rocks. It plays a key role in many processes at the Earth surface, especially the fluxes of matter to soils, ecosystems, rivers, and oceans. Understanding these processes at the global scale requires a high resolution description of lithology. A new high resolution global lithological map (GLiM) was assembled from existing regional geological maps translated into lithological information with the help of regional literature. The GLiM represents the rock types of the Earth surface with 1,235,400 polygons. The lithological classification consists of three levels. The first level contains 16 lithological classes comparable to previously applied definitions in global lithological maps. The additional two levels contain 12 and 14 subclasses, respectively, which describe more specific rock attributes. According to the GLiM, the Earth is covered by 64% sediments (a third of which are carbonates), 13% metamorphics, 7% plutonics, and 6% volcanics, and 10% are covered by water or ice. The high resolution of the GLiM allows observation of regional lithological distributions which often vary from the global average. The GLiM enables regional analysis of Earth surface processes at global scales. A gridded version of the GLiM is available at the PANGEA Database (http://dx.doi.org/10.1594/PANGAEA.788537).