Utah Geochronology Rubidium Strontium

NOTE: This dataset holds 'static' data that we don't expect to change. We have removed it from the SDE database and placed it in ArcGIS Online, but it is still considered part of the SGID and shared on opendata.gis.utah.gov. The Utah Geochronology Database contains ages and related dating information of sampled geologic materials (soil and rock) using argon (40Ar/39Ar), fission track, optically-stimulated luminescence (OSL), radiocarbon (14C), rhubidium/strontium, or uranium/thorium/lead dating methods and were analyzed for a variety of geologic-related projects by the UGS and others. These ages were used in fault trench investigations to determine the timing of past earthquakes and to develop other paleoseismic parameters, in the dating of basalt flows for eruption histories and in dating fault movement, and similar projects. Since geochronologic methods have significantly evolved and improved through time, older data is often not as reliable or usable as more recently dated materials. The user should use caution in using this data, as significant knowledge and experience is often needed to interpret and apply geochronologic data to projects correctly. As the database is expanded in the future, age results from other geochronologic dating methods are anticipated to be added. Various geochronologic data from geologic mapping projects may be found here. Donations of geochronologic data in Utah are appreciated, so that these data can be permanently archived and discoverable and available to all users. Contact the UGS for more details. The Rhubidium/Strontium feature class contains metadata specific to each rhubidium/strontium sample in the database. Not all fields will contain data, due to the lack of available information, or the field may not apply to the specific sample. Most rhubidium/strontium samples in the database were imported from the legacy U.S. Geological Survey National Geochronological Database.注意：本数据集存储的是静态（static）数据，预计不会发生变更。我们已将其从SDE数据库中移除并迁移至ArcGIS Online，但它仍属于SGID的一部分，并在opendata.gis.utah.gov平台对外共享。 犹他州地质年代学数据库（Utah Geochronology Database）收录了经采样获取的地质样品（土壤与岩石）的年代及相关测年信息，测年方法涵盖氩同位素（40Ar/39Ar）、裂变径迹、光释光（OSL）、放射性碳（14C）、铷锶（rhubidium/strontium）、铀钍铅测年法等，由犹他地质调查局（Utah Geological Survey，UGS）及其他机构针对各类地质相关项目完成分析。 这些年代数据被用于断层槽探调查，以确定历史地震发生时间、构建其他古地震参数；同时也用于玄武岩流喷发史定年、断层活动定年及类似相关项目。由于地质年代学测年方法随时间推移不断发展完善，早期数据的可靠性与可用性通常弱于近年获取的测年样品数据。使用者在使用本数据集时需谨慎，因为正确解读并将地质年代学数据应用于项目中，往往需要具备扎实的专业知识与丰富的实践经验。 未来随着数据库扩容，预计还将新增其他地质年代学测年方法得到的年代结果。本平台亦可获取来自地质填图项目的各类地质年代学数据。我们诚挚欢迎犹他州境内地质年代学数据的捐赠，以便此类数据能够得到永久归档、公开检索并向所有用户开放使用。如需了解更多详情，请联系犹他地质调查局（UGS）。 铷锶（rhubidium/strontium）要素类（feature class）包含数据库中每一个铷锶测年样品的专属元数据（metadata）。由于部分信息缺失或字段不适用于特定样品，并非所有字段都会填充数据。本数据库中的绝大多数铷锶测年样品数据均从美国地质调查局国家地质年代学遗留数据库导入。