RM030 Mylonite

Class: 5E (18)
Name: Kristal Mak
Year: 2017 – 2018
地質年代:(化石) (岩石)

化學組成, 鍵及結構:(礦物)

Geological Age: (Fossil) (Rock)

Chemical composition, bonding and structure: (Mineral)

形成:(岩石)

糜棱岩是在韌性斷層帶中,在折疊和斷層期間由於大剪切應變的積累而形成的韌性變質岩。這一過程涉及到母岩幾乎完全的粉碎,原始礦物幾乎完全分解並重新結晶為緊密連接的較小顆粒,形成緻密堅硬的岩石。

Formation:(Rock)

Mylonites are ductilely deformed rocks formed by the accumulation of large shear strain during folding and faulting, in ductile fault zones. This process involves nearly complete pulverisation of the parent rock so the original minerals are almost completely broken down and recrystallise as smaller grains which are tightly intergrown, forming a dense, hard rock.

特性:

糜棱岩的紋理是平坦的。它很細膩,晶體需要在顯微鏡下觀察;有時含有斑晶。糜棱岩很硬。此外,顏色是可變的,從灰色到黑色,但可以根據母岩成分以各種顏色形成。根據原始岩石的原始組成而變化極大。觸摸的時侯很光滑的。

Properties:

The texture of Mylonite is foliated. It is fine grained; grains need to be observed under a microscope; sometimes contains porphyroblasts. It is very hard. Also the color is variable, grey to black, but can form in a variety of colours dependent on parent rock composition. It is extremely variable, dependent on the original composition of the parent rock and generally smooth to touch.

用途:(岩石) (礦物)

糜棱石可用於各種用途,從道路,橋樑,建築物到廚房的鍋,作為寶石或僅用於裝飾您的花園。糜棱石用於建築行業包括道路骨料,園林綠化,築路石料

。糜棱岩尚未用於醫療行業。

Application: (Rock) (Mineral)

Mylonite are used for various purposes starting from construction of roads, bridges, buildings to pot in kitchen, as a gem stone or just for decorating your garden. Mylonite uses in construction industry include for road aggregate, Landscaping, Roadstone. Mylonite rock is not yet used in the medical industry.

分佈:(岩石) (礦物)

它存放在東部大陸,例如中國,印度,印度尼西亞,沙特阿拉伯,亞洲的韓國,埃塞俄比亞,非洲的加納,以及歐洲的英國,芬蘭,法國和德國。此外,西部大陸也有存款,如美國。對於大洋洲大陸,澳大利亞中西部地區,也可以找到糜棱岩。

Distribution:

It deposits in Eastern Continents, for example China, India, Indonesia, Saudi Arabia, South Korea in Asia, Ethiopia, Ghana in Africa, and England, Finland, France, Germany in Europe. Also, there are deposits in Western continents, like USA. For Oceania Continent, central and western Australia, Mylonite can also be found.

知多一點點:

“Mylonlite”一詞來自希臘mulōn mill。 

More to learn:

The word ‘Mylonlite’ is from Greek mulōn mill.