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Eolian
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sand, Zuun mod Elstei,
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Mongolia
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Sampling area | Glass bead is 200 µ in diameter |
Location: | Zuun mod Elstei, 50 km east of Ulaanbaatar, Mongolia; E 107°28'55.1"; |
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N |
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47°47'27.5" |
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Depositional facies: | replace this with text about the dep facies |
Provenance: | Mix of (1) |
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granitoid |
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plutonic |
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rocks |
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and |
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(2) |
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low-medium-grade |
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metasedimentary |
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(schist, |
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marble) |
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and |
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possibly |
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metavolcanic |
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rocks |
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Composition: |
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Mix |
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of |
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translucent |
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- |
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transparent |
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quartz |
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with |
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pink |
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feldspar, |
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white |
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marble |
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and |
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grey-green |
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low-grade |
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metamorphic |
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rocks |
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(schists); |
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possibly |
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also |
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higher-grade |
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metamorphic |
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rocks |
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involved. |
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Few heavy |
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minerals, |
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including |
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garnets | |
Texture: | Characteristic eolian texture: Medium grained (mL-MU; |
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mean |
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ca. |
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350 |
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µ), |
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well |
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sorted, |
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depending |
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on |
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mineralogy |
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poorly |
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to |
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well |
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rounded. |
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Characteristic |
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polished, |
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matted |
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("frosted") |
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grain |
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surfaces |
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typical |
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of |
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eolian |
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transport |
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Petrographic thin section:
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Description: | insert here short description of thin section |
insert here a bright field image | insert here short description of thin section | insert here a dark field image |
Bright field |
| Dark field |
Sample number | heubeck0142 |
Collector | Dr. Ochirbat Batkhishig, Institute of Geography, Mongolian Academy of Sciences, Mongolia |
Date of sampling | January, 2008 |
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Comments:
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Characteristic eolian texture: Medium grained (mL-MU; mean ca. 350 µ), well sorted, depending on mineralogy poorly to well rounded. Characteristic polished, matted ("frosted") grain surfaces typical of eolian transport
