Utah Geochronology Fission Track

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 Fission Track feature class contains metadata specific to each fission track 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 fission track samples in the database were imported from the legacy U.S. Geological Survey National Geochronological Database.注意：本数据集存储的为静态（static）数据，预计不会发生变更。我们已将其从SDE数据库中移出并上传至ArcGIS Online，但它仍属于SGID的一部分，并在opendata.gis.utah.gov平台上共享。犹他州年代学数据库（Utah Geochronology Database）收录了通过氩气（⁴⁰Ar/³⁹Ar）、裂变径迹、光释光（optically-stimulated luminescence, OSL）、放射性碳（¹⁴C）、铷/锶、铀/钍/铅等定年方法获取的采样地质物质（土壤与岩石）的年代及相关定年信息，这些数据由犹他地质调查局（UGS）及其他机构针对各类地质相关项目完成分析。上述年代数据曾被应用于断层探槽调查，以确定过往地震发生时间并构建其他古地震参数；同时也用于玄武岩流喷发历史定年、断层活动定年及类似项目。随着年代学方法随时间不断演进与优化，早期数据的可靠性与可用性通常不及新近定年的样品数据。用户在使用本数据集时需谨慎，因为正确解读并将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，预计还将新增其他年代学定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年代学数据。我们诚挚欢迎犹他州境内年代学数据的捐赠，以使这些数据能够得到永久归档、可被检索并向所有用户开放共享。如需了解更多细节，请联系犹他地质调查局（UGS）。裂变径迹要素类（Fission Track feature class）包含数据库中每一条裂变径迹样品的专属元数据。由于部分信息缺失，或部分字段不适用于特定样品，并非所有字段均会包含数据。数据库中的绝大多数裂变径迹样品数据均源自旧版美国地质调查局国家年代学数据库。