About Jessica Carrillo luminescence dating archaeology
The Luminescence Dating Laboratory at the Research Laboratory for Archaeology and the History of Art, University of Oxford, has been actively involved in the development and application of luminescence dating for more than 50 years. The Laboratory has considerable experience in the dating of sediments and pottery and offers a service for luminescence dating of archaeological, environmental and Quaternary geological contexts. This includes optically stimulated luminescence OSL dating of sediments as well ceramics pottery, brick, tile, etc…and burnt stones. Luminescence dating is particularly appropriate when radiocarbon dating is not possible either where no suitable material is available or for ages beyond the radiocarbon age luminescence dating archaeology or for applications affected by radiocarbon plateau effects e.
Luminescence dating refers to a group of methods of determining how long ago mineral grains were last exposed to sunlight or sufficient heating. It is useful to geologists and archaeologists who want to know when such an event occurred. It uses various methods to stimulate and measure luminescence. All sediments and soils contain trace amounts of radioactive isotopes of elements such as potassium , uranium , thorium , and rubidium. These slowly decay over time and the ionizing radiation they produce is absorbed by mineral grains in the sediments such as quartz and potassium feldspar.
Luminescence dating utilises energy deposited in mineral lattices by naturally occurring ionising radiation to record information encoding chronology, depositional process information, and thermal history records in ceramics, lithics, and sedimentary materials. Precision of dating varies from sample to sample, and from context to context, depending on individual sample characteristics mineralogy, luminescence sensitivity, stability and homogeneity of the radiation environment, and the quality of initial zeroing. A well calibrated laboratory can produce accuracy at the lower end of the precision scale. For high quality work it is important that the environmental gamma dose rates are recorded in-situ at time of excavation, which is most readily facilitated by involving the dating laboratory in fieldwork.
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Luminescence dating refers to a group of methods of determining how long ago mineral grains were last exposed to sunlight or sufficient heating. It is useful to geologists luminescence dating archaeology archaeologists who want to know when such an event occurred. It uses various methods to stimulate and measure luminescence. All sediments and soils contain trace amounts of radioactive isotopes of elements such as potassiumuraniumthoriumand rubidium.
Luminescence dating dates crystalline materials, such as quartz or feldspar, to the last time they were exposed to sufficient heat or sunlight. It is useful for dating prehistoric ceramics and lithics and for dating the deposition of sediments. Although not as precise as radiocarbon, luminescence dating has the advantage of dating directly archaeologically relevant events and is often applicable where no other method is practical. Single-grain dating of sediments also has the potential to address turbation processes.