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Thus, assigning age significance to a result requires studying the metasomatic and thermal history of the rock, any metamorphic events, and any evidence of fluid movement.A Rb-Sr date which is at variance with other geochronometers may not be useless, it may be providing data on an event which is not representing the age of formation of the rock.About 40 herders from nine households had to be evacuated due to the incident, according to local news media.Science and Technology Daily reported on September 12 that the video had been taken in Zhaduozhen of Yushu Tibetan Autonomous Prefecture in Qinghai Province.Rb-Sr dating relies on correctly measuring the Rb-Sr ratio of a mineral or whole rock sample, plus deriving an accurate One of the major drawbacks (and, conversely, the most important use) of utilizing Rb and Sr to derive a radiometric date is their relative mobility, especially in hydrothermal fluids.Rb and Sr are relatively mobile alkaline elements and as such are relatively easily moved around by the hot, often carbonated hydrothermal fluids present during metamorphism or magmatism.

Rubidium substitutes for potassium within the lattice of minerals at a rate proportional to its concentration within the melt.However, Meng Xingmen, the head of the Western China's Environment and Climate Change in Lanzhou University, confirmed that the solifluction was not related with earthquakes.Science and Technology Daily stated that the thawing of the permafrost had happened quite often in northern China as the weather in Tibetan Plateau had turned warmer with an increase of rainfall.Conversely, these fluids may metasomatically alter a rock, introducing new Rb and Sr into the rock (generally during potassic alteration or calcic (albitisation) alteration.Rb-Sr can then be used on the altered mineralogy to date the time of this alteration, but not the date at which the rock formed.

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