منابع مشابه
Garnet: A Rock-Forming Mineral Petrochronometer
Garnet could be the ultimate petrochronometer. Not only can you date it directly (with an accuracy and precision that may surprise some), but it is also a common rock-forming and porphyroblast-forming mineral, with wide ranging—yet thermodynamically well understood— solid solution that provides direct and quantitative petrologic context. While accessory phase petrochronology is based largely up...
متن کاملBone as a mineral reserve.
2. Part of epiphyseal cartilage of upper vertebra shown in I. Long columns of cartilage cells, indicating the intense activity of the cartilage, are evident. x 130. 3. Part of epiphyseal cartilage of lower vertebra shown in I. Cartilage columns are shorter than those in 2, indicating less marked activity of the growth cartilage. x 130. 4. Sagittal section of lumbar vertebrae of mature rabbit sh...
متن کاملAs printed in Mineral News
The state of Wisconsin has a proud mining history. From the historic lead/zinc mines in the state’s southwest to the iron mines of its north, much has been written of Wisconsin’s mineral wealth and its role in the development of our nation (LaBerge, 1994). So when strong opposition to mining emerged in northern Wisconsin in the 1980’s, I think many of us Michigan geologists looked on with a mix...
متن کاملSoil as a Source Contributor in Mineral Dust Fallout at Urban Industrial Residential Area
The components and quantities of atmospheric dusts fallout has been reported to be the pollution indicator of large urban areas. The multiplicity and complexity of sources of atmospheric dusts in urban regions (e.g. industrial complexes composed of a variety of industrial processes, automobiles, construction activities etc.) has put forward the need of source apportionment of these sources indi...
متن کاملMagnetic susceptibility as a tool for mineral exploration (Case study: Southern of Zagros Mountains)
Magnetic susceptibility has been extensively used to determine the magnetic properties of rocks for different applications, such as hydrocarbon or mineral explorations. This magnetic quantity can be directly measured in an accurate but time-consuming operation, or it can be mathematically approximated using a reliable procedure to achieve a desired accuracy. The Poisson theory is one of the mos...
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ژورنال
عنوان ژورنال: American Journal of Science
سال: 1925
ISSN: 0002-9599
DOI: 10.2475/ajs.s5-10.57.247