Bulk Rock Stable Isotopes Database Table

The bulk rock stable isotopes database table contains publicly available results from Geoscience Australia's organic geochemistry (ORGCHEM) schema and supporting oracle databases for the stable isotopic composition of sedimentary rocks with an emphasis on calcareous rocks and minerals sampled from boreholes and field sites. The stable isotopes of carbon, oxygen, strontium, hydrogen, nitrogen, and sulfur are measured by various laboratories in service and exploration companies, Australian government institutions, and universities, using a range of instruments. Data includes the borehole or field site location, sample depth, stratigraphy, analytical methods, other relevant metadata, and the stable isotopes ratios. The carbon (13C/12C) and oxygen (18O/16O) isotope ratios of calcareous rocks are expressed in delta notation (i.e., δ13C and δ18O) in parts per mil (‰) relative to the Vienna Peedee Belemnite (VPDB) standard, with the δ18O values also reported relative to the Vienna Standard Mean Ocean Water (VSMOW) standard. Likewise, the stable isotope ratio of hydrogen ( 2H/ 1H) is presented in delta notation (δ 2H) in parts per mil (‰) relative to the VSMOW standard, the stable isotope ratio of nitrogen ( 15N/14N) is presented in delta notation (δ15N) in parts per mil (‰) relative to the atmospheric air (AIR) standard, and the stable isotope ratio of sulfur ( 34S/ 32S) is presented in delta notation (δ 34S) relative to the Vienna Canyon Diablo Troilite (VCDT) standard. For carbonates, the strontium (87Sr/86Sr) isotope ratios are also provided.These data are used to determine the isotopic compositions of sedimentary rock with emphasis on the carbonate within rocks, either as minerals, the mineral matrix or cements. The results for the carbonate rocks are used to determine paleotemperature, paleoenvironment and paleoclimate, and establish regional- and global-scale stratigraphic correlations. These data are collated from Geoscience Australia records, destructive analysis reports (DARs), well completion reports (WCRs), and literature. The stable isotope data for sedimentary rocks are delivered in the Stable Isotopes of Carbonates web services on the Geoscience Australia Data Discovery Portal at https://portal.ga.gov.au which will be periodically updated.

全岩稳定同位素数据库表收录澳大利亚地质调查局（Geoscience Australia）有机地球化学（ORGCHEM）数据库模式及配套Oracle数据库中公开的沉积岩稳定同位素组成数据，重点覆盖从钻孔与野外采样点采集的碳酸盐岩及其矿物。碳、氧、锶、氢、氮及硫的稳定同位素由多家服务与勘探企业、澳大利亚政府机构及高等院校采用多类仪器完成测定。数据集包含钻孔或野外采样点位置、样品深度、地层信息、分析方法、其他相关元数据以及稳定同位素比值。碳酸盐岩的碳（13C/12C）与氧（18O/16O）同位素比值以δ记法（即δ¹³C与δ¹⁸O）表示，单位为千分比（‰），相对维也纳佩迪贝箭石（VPDB）标准；其中δ¹⁸O值同时相对维也纳标准平均海水（VSMOW）标准报告。同理，氢（2H/1H）稳定同位素比值以δ记法（δ²H）表示，单位为千分比（‰），相对VSMOW标准；氮（15N/14N）稳定同位素比值以δ记法（δ¹⁵N）表示，单位为千分比（‰），相对大气空气（AIR）标准；硫（34S/32S）稳定同位素比值以δ记法（δ³⁴S）表示，相对维也纳峡谷迪亚布洛陨硫铁（VCDT）标准。针对碳酸盐岩，还同步提供锶（87Sr/86Sr）同位素比值。本数据集用于测定沉积岩的稳定同位素组成，研究重点为岩石中的碳酸盐组分，包括矿物、矿物基质或胶结物。碳酸盐岩的分析结果可用于恢复古温度、古环境与古气候，并建立区域乃至全球尺度的地层对比框架。数据集数据整合自澳大利亚地质调查局档案、破坏性分析报告（DARs）、完井报告（WCRs）及公开学术文献。沉积岩稳定同位素数据可通过澳大利亚地质调查局数据发现门户（https://portal.ga.gov.au）的“碳酸盐稳定同位素”网络服务获取，该服务将定期更新。