Thin Section of Minerals

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در اين تاپيك به بررسي خواص ميكروسكوپي كاني ها و سنگ ها مي پردازيم .
اميدوارم همراهي كنيد و خوشتون هم بياد .
اينجا عكس مي گذاريم بعد در مورد بافت و خواصش صحبت مي كنيم

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كسي درباره بافت ميرمكيت اطلاعات داره ؟؟

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http://i7.tinypic.com/47wang9.jpg
Amphibolite - Cross polarized light - Godin Tepe - Iran

Amphibole Group

Sharred Properties:
Crystal system: Monoclinic
Twinning: simple, lamellar, common
Cleavage: two good at about 60 or 120o
Relief: moderate, moderate to high
Occurrence: metamorphic rocks


It is often more convenient in pottery thin-sections to group the amphibole group together. They can be identified collectively by the distinct cleavages and it is probably preferable in most cases to simply say whether the inclusion is pleochroic, and if so what is the nature of the pleochroism, or that it is not pleochroic at all. This is preferable to unreliable identifications, the most common being identifying a red pleochroic amphibole as the relatively rare oxyhornblende, when it is more likely to be an ordinary green-pleochric amphibole which has been altered in the firing.

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http://i9.tinypic.com/46ztgyf.jpg
Plagioclase - Cross polarised light - Faza petrofabric, Yemen - field of view 0.5mm
http://i9.tinypic.com/2ls6vlj.jpg
Plagioclase - same as above - rotated to display areas of extinction


Plagioclase

Na[AlSi3O8] - Ca[Al2Si2O8]2

Crystal system: Triclinic
Refractive index: 1.527-1.590
Birefringence: 0.10-0.13
Cleavage: 1 perfect, 1 good intersecting at angle
Twinning: lamellar twinning
Colour in PPL: colourless
Pleochroism: -
Relief: low
Distinction: lamellar twinning distinctive, untwinned plagioclase is practically impossible to distinguish from untwinned potassic feldspars
Occurrence: most abundant mineral in basic and intermediate igneous rocks, widespread in metamorphic rocks

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كسي واقعا عكس نداره بگذاره ؟
لاقل سئوال بپرسيد

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Serpentine

Mg3[Si2O5](OH)4

Crystal system: Monoclinic
Refractive index: 1.532-1.574
Birefringence: 0.004-0.007 (antigorite), 0.006-0.008 (lizardite), 0.013-0.017 (chrysotile)
Cleavage: chrysotile fibrous, others one perfect
Twinning: occasional
Colour in PPL: colourless to pale green, often oxidizes to red in pottery
Pleochroism:
Relief: low
Distinction: lower birrefringence than micas, chlorite higher RI
Occurrence: altered ultrabasic rocks, especially from ophiolites


http://i13.tinypic.com/44rhcwg.jpg
Serpentine - Plain polarised light - Tell Hadidi - Syria
http://i17.tinypic.com/40dbfys.jpg
Serpentine - Plain polarised light - Tell Hadidi - Syria

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http://www.uwgb.edu/dutchs/PETROLGY/chlorite.htm

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http://i11.tinypic.com/2icaz2b.jpg

[Jaafar]

شلام

bb جونم خوبی عزیز

واقعا دستت درد نکنه

می گم می شه در رابطه با اینایی که می زاری توضیح فارسیشم بنویسی

ممنون می شم

hTtp://qsmile.com/qsimages/sp/clover[1].gif

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شلام

bb جونم خوبی عزیز

واقعا دستت درد نکنه

می گم می شه در رابطه با اینایی که می زاری توضیح فارسیشم بنویسی

ممنون می شم

hTtp://qsmile.com/qsimages/sp/clover[1].gif

سلام دوست من
ميدونم شايد انگليسيش براي برخي از دوستان مشكله
ولي اگه دقت كنيد خيلي راحته
اوليش اسم كاني بعد فرمول شيميايي بعدش سيستم تبلوري بعد دوتايي و كليواژ و....
سعي مي كنم فارسي باشه

[s831153]

ميرمكيت بافتي است كه از رشد تداخلي كاني هايي مثل كوارتز و فلدسپار حاصل مي شود ولي برخلاف بافت گرافيكي اين بافت كرمي شكل است.

[s831153]

http://C;/Document and settings/geo3g831153/My Documents/My pictures/Gtdc7ax

گارنت

[s831153]

http://www.geo.umn.edu/orgs/whitney/kyanite.htm

در مورد کیانیت شیست مقاطع خوبی داره

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از سانيدين چيزي داري؟

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http://www.microscopy-uk.org.uk/mag/artfeb04/iwouslides2.html

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http://i17.tinypic.com/2aag6fb.jpg

ديوريت

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زونه در فلدسپار ( پلاژيوكلاز)
http://uts.cc.utexas.edu/~rmr/CLweb/CLimages/HSH-8-02-CL-ds.jpg

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http://i19.tinypic.com/4ge4fwg.jpg

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http://www.soton.ac.uk/~imw/jpg-Portland/2PT-Sandholes-oolite-labelled.jpg
http://www.soton.ac.uk/~imw/jpg-Hurst/6HCS-larvikite-thin-section.jpg
http://www.geokem.com/images/scans/Syanite-thin-section2.jpg
http://www.geokem.com/images/scans/Syanite-thin-section.jpg
http://pubs.usgs.gov/dds/dds-033/USGS_3D/ssx_gif/glauts.gif
http://www.catchafallingstar.com/nwa998thinjohn2.jpg
http://www.uvm.edu/perkins/Rocks/igneous%20rocks/plutonic%20rocks/PGMTS150499_003.jpg
http://www.und.nodak.edu/instruct/mineral/320petrology/opticalmin/jpgs/PlagG3XP.jpg
http://fti.neep.wisc.edu/neep602/FALL97/LEC17/Batch_Three-01.JPG

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Thin section of rock brought back to earth by Apollo 12 mission

An idea of the mineralogy and texture of a lunar sample can be achieved by use of color microphotos. This thin section is Apollo 12 lunar sample number 12057.27, under polarized light. The lavender minerals are pyrexene; the black mineral is ilmenite; the white and brown, feldspar; and the remainder, olivine.
http://www.apolloexplorer.co.uk/photo/img/AS12/10075446.jpg

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!!!! برای مشاهده محتوا ، لطفا ثبت نام کنید / وارد شوید !!!!

0X, cross polarized light

Notice the variable birefringence of the pyroxenes. In part this is caused by composition variations in the pyroxene.

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THIS IS ABOUT THIN SECTION OF ROCKS AND MINERALS
http://www.olympusmicro.com/galleries/polarizedlight/pages/rocksindex.html

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Names of Special Igneous Rock Textures

Volcanic

Microlitic
http://www-odp.tamu.edu/publications/180_SR/176/plates/3_4.jpg

Spherulitic
http://www-odp.tamu.edu/publications/200_IR/chap_04/images/04_f42.jpg
A. A low-magnification photomicrograph of palagonitized hyaloclastite. The altered glass shards are not vesicular. Note zoning of palagonitic alteration in several shards. B. Another portion of the same hyaloclastite showing palagonite rims surrounding relict fresh brown basaltic glass. The glass contains almost no crystallites. C. Detail of zoning of palagonite of one altered glass shard seen in A, center left. D. Tiny and numerous plagioclase and clinopyroxene crystallites in a glass shard in the hyaloclastite that experienced incipient crystallization. E. A slightly more crystalline glass shard similar to D but with a pale-brown spherulitic overgrowth on many of the crystallites

Vitrophyric
http://www.science.marshall.edu/elshazly/igtext/vitrophyric.jpg

Intersertal
http://www.science.marshall.edu/elshazly/igtext/intersertal.jpg

Intergranular
http://www.science.marshall.edu/elshazly/igtext/intergranular.jpg

Felty

Pilotaxitic
http://www.science.marshall.edu/elshazly/igtext/pilotaxitic.jpg

Trachytic

Subophitic
http://www.science.marshall.edu/elshazly/igtext/ophitic.jpg

Ophitic

Dictytaxitic

Glomeroporphyric

Pyroclastic

Seriate

Spinifex



Plutonic

Poikilitic
http://www.science.marshall.edu/elshazly/igtext/poiklilitic.jpg

Graphic

Ophitic

Subophitic

Diabasic

Orthocumulate
http://web.uct.ac.za/depts/geolsci/dlr/301s/bv_thin/lz_10.jpg

Mesocumulate

Adcumulate

Symplectic

Myrmekitic
http://www.science.marshall.edu/elshazly/igtext/myrmekitic.jpg

Seriate

Trachytoidal
http://www-odp.tamu.edu/publications/180_IR/chap_10/images/10_f10.jpg

Granophyric


Other

Zoned

Corona

Kelphytic rim

Rapakivi

Epitaxial

Poikilitic

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!!!! برای مشاهده محتوا ، لطفا ثبت نام کنید / وارد شوید !!!!



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http://i14.tinypic.com/6bcobgz.jpg

http://i10.tinypic.com/4vrzs78.jpg

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http://i6.tinypic.com/53t9w11_th

!!!! برای مشاهده محتوا ، لطفا ثبت نام کنید / وارد شوید !!!!

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http://i17.tinypic.com/62fzswi_th
!!!! برای مشاهده محتوا ، لطفا ثبت نام کنید / وارد شوید !!!!

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!!!! برای مشاهده محتوا ، لطفا ثبت نام کنید / وارد شوید !!!!

!!!! برای مشاهده محتوا ، لطفا ثبت نام کنید / وارد شوید !!!!

[msshamraz]

مقاطع میکروسکوپی از متئوریت ها
!!!! برای مشاهده محتوا ، لطفا ثبت نام کنید / وارد شوید !!!!

[masbeh]

سلام دوستان

كتاب زير اطلس مقاطع نازك ميكروسكوپي هستش..
اميدوارم بدردتون بخوره..

!!!! برای مشاهده محتوا ، لطفا ثبت نام کنید / وارد شوید !!!!