Tectonics units 1:500 000 (DMIRS-037)

The digital '1:500 000 tectonic units of Western Australia, 2017' has been compiled using boundaries derived from the digital '1:500 000 State interpreted bedrock geology of Western Australia, 2016' following the principles first used on the '1:500 000 Tectonic units of Western Australia — Preliminary Version' (2007). For the offshore component, the map uses data and divisions from the Geoscience Australia ‘Australian Geological Provinces’ GIS dataset, with polygons adjusted to match seamlessly into the onshore tectonic elements. The nomenclature and hierarchy for the tectonic units are based on the GSWA Explanatory Notes System. The State is the highest level unit in the hierarchy, and is subdivided at the next level into Archean to Paleoproterozoic cratons; Proterozoic orogens; Archean, Proterozoic and Phanerozoic basins (or superbasins); and igneous supersuites. All units depicted on this map, with the exception of basins and some igneous supersuites, are at the third or lesser hierarchical level. Cratons are subdivided into superterranes, terranes, and domains. Orogens are divided into provinces and orogenic forelands, and may also incorporate sedimentary basins; provinces are further subdivided into terranes/zones. The reworking of basins and craton margins into orogens and orogenic forelands is represented on a companion layer, the '1:500 000 orogenic events of onshore Western Australia, 2015'. Igneous supersuites are further divided into suites, and both may be constituents of cratons, orogens, or large igneous provinces (LIPs). Basins are divided into sub-basins and sub-basin elements, which include shelves, highs, terraces, arches, platforms, ridges, troughs, embayments and grabens, and are locally ranked and stacked according to age where units overlie each other. The order of overlapping polygon units is indicated by the DRAWORDER field; the draw order may display incorrectly in the MapInfo format type. Any tectonic unit within the hierarchy may also be preserved as an inlier or outlier, in which case it is depicted as a separate unit. Polygons on this map represent the present-day area of tectonic units, without inference on their original extent.License: Creative Commons AttributionTags: 500 000, Geology, Geosciences, TectonicsContact: [e-mail]

2017年版《澳大利亚西部1:50万构造单元》数字化数据集，基于2016年版《澳大利亚西部1:50万州域解释基岩地质》数字化数据集的边界编制完成，沿用了2007年版《澳大利亚西部1:50万构造单元——初步版本》所采用的编制原则。对于海域部分，本数据集采用了澳大利亚地质科学局（Geoscience Australia）发布的‘澳大利亚地质省’GIS数据集的数据与分区，并对多边形边界进行调整，以实现与陆上构造单元的无缝衔接。构造单元的命名规则与层级体系遵循西澳大利亚地质调查局（GSWA）的注释说明系统。层级体系中，‘州域’为最高级单元，其下一级可细分为：太古宙至古元古代克拉通、元古代造山带、太古宙、元古代及显生宙盆地（或超盆地），以及火成超单元。本图中所有展示的构造单元，除盆地与部分火成超单元外，均处于第三层级及更低层级。克拉通可进一步划分为超地体、地体与构造域；造山带可分为省与造山带前陆区，亦可包含沉积盆地；省单元可再细分为地体/带。将盆地与克拉通边缘改造为造山带及造山带前陆区的相关内容，将在配套图层《2015年版澳大利亚西部陆上造山事件1:50万》中予以展示。火成超单元可进一步划分为岩套，超单元与岩套均可作为克拉通、造山带或大火成岩省（LIPs）的组成部分。盆地可细分为次级盆地与次级盆地单元，包括陆架、隆起、阶地、拱起、台地、脊、槽、海湾与地堑，且可根据叠置单元的形成时代进行局部分级与堆叠。重叠多边形单元的叠置顺序由DRAWORDER字段标注；但在MapInfo格式中，该叠置顺序可能无法正确显示。层级内的任意构造单元若以孤立露头（inlier）或异地残块（outlier）形式产出，均将作为独立单元单独绘制。本图中的多边形代表构造单元的现今分布范围，并未推断其原始延展规模。许可证：知识共享署名（Creative Commons Attribution）
标签：1:50万、地质学、地球科学、构造地质学
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