Category Archives: Rock

RM026 Hornfels

Class: 5E Name: Lam Kwan Ho Year: 2017 – 2018 地質年代:中生代 化學組成, 鍵及結構:角鐵的結構非常有特色。很少有任何礦物顯示出結晶形式,但是小顆粒像馬賽克的碎片一樣緊密地結合在一起; 它們通常具有幾乎相同的尺寸。這被稱為pflaster或路面結構從粗糙的路面工作的相似之處。每種礦物質也可以包圍其他顆粒; 在石英中,例如石墨,黑雲母,氧化鐵,矽線石或長石的小晶體可能出現很多。通常這些穀物都是以這種方式呈現半透明的。最小的晶體可能顯示出結晶輪廓的痕跡; 無疑它們具有新的形成,並且始於原地。這導致我們相信整個岩石已經在高溫和固態下重結晶,因此礦物分子幾乎沒有自由來建立良好個性化的晶體。岩石的再生已足以消除大部分原始結構,並且或多或少地完全用新礦物代替原礦物。 它的化學組成是Fe-O-MgO-Al2O3-SiO2-H2O。     Geological Age: Mesozoic age Chemical composition, bonding and structure: The structure of the hornfels is very characteristic. Very rarely do any of the minerals show crystalline form, but the small grains fit closely together like the fragments of a mosaic; they are usually of nearly equal dimensions. This has been called pflaster or pavement structure from the resemblance to rough pavement work. Each mineral may also…

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RM025 Hornfels(Banded)

Class: 5E Name: KEUNG MAN HIM Year: 2017 – 2018   地質年代:(化石) (岩石) 化學組成, 鍵及結構:粘土岩、粉砂岩、火成岩、灰岩各種火山碎屑岩 Geological Age: (Fossil) (Rock) Chemical composition, bonding and structure: Clay rocks, siltstones, igneous rocks, limestone all kinds of pyroclastics 形成:由中高溫熱接觸變質作用形成 原生物:(化石) Formation:Formed by high-temperature thermal contact metamorphism Living Specimens: (Fossil) 特性:岩石外表一般為深色,有時為淺色,緻密堅硬   Properties:The appearance of rocks is generally dark, sometimes light, dense and hard 用途:它被用作道路基礎和混凝土。 它可以在園林中作為裝飾性的岩石在園林中使用   Application: It is used as a road base and concrete. It can be used as a decorative rock in gardens in gardens  …

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RM023 Cordierite Hornfels

Class: 5E Name: Katie Chan Year: 2017 – 2018   地質年代:(化石) (岩石) 化學組成, 鍵及結構:(礦物)   堇青石角頁岩沒有指定的化學組成公式,但它的原石有: 石英、長石、石榴石及方解石。 Geological Age: (Fossil) (Rock) Chemical composition, bonding and structure: (Mineral)   Cordierite Hornfels does not have a specific chemical or mineralogical composition. Quartz , feldspar , garnet, and calcite are the common parent rocks of Cordierite Hornfels. 形成:(岩石) (礦物)   堇青石角頁岩是由接觸變質形成。接觸變質即是大量岩漿侵入原有的石頭( 無論是流進夾縫還是碰到火成岩 ),令鄰近的石頭暫時變得柔軟,重新凝固為不同的石頭 堇青石角頁岩。 原生物:(化石)  / Formation:(Rock) (Mineral)   Cordierite Hornfels is formed by contact metamorphism . Contact metamorphism occurs when a mass of hot magma intrudes into preexisting rock , whether by injecting itself…

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RM022 White Marble

Class: 5E Name: Khushdeep 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:大理石是由重結晶碳酸鹽礦物組成的變質岩,最常見的是方解石或白雲石。。 在地質學中,術語“大理石”是指變質的石灰石, Formation: Marble is a metamorphic rock composed of recrystallized carbonate minerals, most commonly calcite or dolomite. Marble may be foliated. In geology the term “marble” refers to metamorphosed limestone,   特性: 純白色大理石是非常純(貧矽酸鹽)石灰岩或白雲石原岩的變質作用的結果。 許多有色大理石品種的特徵性漩渦和紋理通常是由於各種礦物雜質如粘土,淤泥,沙子,鐵氧化物或燧石,它們最初以石灰石中的顆粒或層狀存在。   Properties: Pure white marble is the result of metamorphism of a very pure (silicate-poor) limestone or dolomite protolith. The characteristic swirls and veins of many colored marble varieties are usually due to various mineral impurities such as clay, silt, sand, iron oxides, or chert which…

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RM020 Slate

Class: Luk Tsun Ki Name: 5D 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) (礦物) 原生物:(化石) 板岩是由低品位區域變質作用改變頁岩或泥岩而形成的細粒岩石,片理變質岩 Formation:(Rock) (Mineral) Living Specimens: (Fossil) Slate is a fine-grained, foliated metamorphic rock that is created by the alteration of shale or mudstone by low-grade regional metamorphism. 特性: 板岩能夠刮擦玻璃和鋼。 紅色板石是由赤鐵礦形成,綠板石是由泥石形成,藍灰板石是由絹雲母形成,黑色板石是由碳質材料形成和黃褐色褐鐵礦形成。 石板的分裂面可能有光澤或暗淡的光澤。交叉斷裂的板岩通常是暗的。 板岩是不透明的材料所以不透光。 Properties: Slate is hard enough to be able to scratch glass and steel. Red slate is caused by hematite, green by chlorite, blue-gray by sericite,…

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RM018 Serpentine

Class: 5D Name: Lam Yau Him Year: 2017 – 2018   地質年代:(化石) (岩石) 化學組成, 鍵及結構:(礦物) 主要由蛇纹石矿物组成 Geological Age: (Fossil) (Rock) Chemical composition, bonding and structure: (Mineral) serpentinite rock, partially made up of chrysotile 形成:(岩石) (礦物) 由富镁之硅酸盐矿物经热水蚀变或变质作用,将超基性 岩石中的橄榄石和辉石与水作用发生蛇纹石化,从而形成的一种变质岩石。 原生物:(化石) Formation:(Rock) (Mineral) formed by serpentinization, a hydration and metamorphic transformation of ultramafic rock from the Earth’s mantle. Living Specimens: (Fossil) 特性: 蛇纹岩质软,具有滑感,主要由蛇纹石组成,颜色一般为灰绿色、黑绿色或黄绿色,色泽不均匀,颜色鲜艳半透明 Properties: Soil cover over serpentinite bedrock tends to be thin or absent. Soil with serpentine is poor in calcium and other major plant nutrients, but rich in elements toxic to plants such…

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RM017 Serpentine

Class: 5D Name: Chua Kwai Wa 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) (礦物) l   蛇紋石化是由來自海洋地幔的深海岩石的區域變質形成的。 l   它通過地幔岩橄欖岩的蝕變,( 當鎂鐵質火成岩被水改變時) 在地球深處的構造板塊邊界形成。 l   它是一種地熱低溫變質作用過程,包括熱和水,其中低矽鎂鐵鎂和超鎂鐵質岩被氧化(由水的質子對Fe2 +進行厭氧氧化,導致形成H2),並用水將其水解成蛇紋岩。 原生物:(化石) Formation:(Rock) (Mineral) l   Serpentinization forms by regional metamorphism of deep-sea rocks from the oceanic mantle. l   It forms at tectonic plate boundaries deep within the Earth by the alteration of the mantle rock peridotite. (when mafic igneous rocks are altered by water) l   It is a geological low-temperature metamorphic process involving…

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RM016 Pink Gneiss

Class: 5D Name: Cheung Pak Tung Year: 2017 – 2018   地質年代:(化石) (岩石) 化學組成, 鍵及結構:(礦物) 對於淺色帶,岩石通常包含長石礦物(長石,斜長石)和石英等長英質礦物。   對於深色帶,它主要含有黑雲母,輝石(輝石)和角閃石(角閃石)等基性礦物, Geological Age: (Fossil) (Rock) Chemical composition, bonding and structure: (Mineral) For the light coloured bands, the rocks usually contain felsic minerals such as feldspar (orthoclase, plagioclase) and quartz.   For the dark coloured bands, it mostly contains mafic minerals such as biotite, pyroxene (augite) and amphibole ( hornblende) 形成:(岩石) (礦物) 片麻岩通常由匯聚板塊邊界的區域變質作用形成。 它是一種高品位的變質岩石,礦物顆粒在強熱和高壓下發生再結晶。 這種改變增加了礦物顆粒的大小,並將它們分離成帶狀物,這種變化使岩石及其礦物在變質環境中更加穩定。   Formation:(Rock) (Mineral) It is formed by regional metamorphism at convergent plate boundaries. As…

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