A piece of Portugal🇵🇹 in Taiwan🇹🇼 #Vein#Marble
Logging Tasks
1. Observe the sculpture and describe the shape of the veins on its abdomen. Are they linear, wavy, or swirling?
2. Try to identify the veins of defferent colors in the marble and explain why they each appear in various colors.
3. Take a photo of the marble with you, your identifying item, or your GPS device.
To log this EarthCache as “Found It,” please send me your suggested answers via messages. Please do not post your answers,except task 3, in your log. I hope you enjoy this EarthCache. Favorite Point Appreciated!
登錄任務
1. 請觀察雕塑，嘗試描述雕塑腹部區域的紋理形狀，例如：線條狀、波浪狀、渦旋狀?
2. 盡可能地找到大理石中不同顏色的紋理，試著說明各個紋理為什麼會有不同的顏色?
3. 請與大理石拍照，照片包含大理石與你、你的代表物、或你的GPS裝置。
登錄此地質寶為「found it」並透過 geocaching.com 訊息發送給我您建議的答案。除了任務3，請不要在log中公布你的答案。希望你喜歡這個地質寶，歡迎給予FP。
Introduction
In 228 Peace Park, there is a marble sculpture titled Earth and Mother, created by sculptor Chang Tzu-Lung. The sculpture is made from Marble Rosa Portuguese, a unique type of marble known for its flowing pink patterns that preserve the geological memory of the Earth.
The sculpture's gentle curves resemble a mother’s embrace, while the marble's veins record hundreds of millions of years of geological changes - beginning as marine sediments, then buried deep underground, undergoing high temperature and pressure metamorphism, and finally being sculpted into this artwork.
Geological Knowledge: Marble Rosa Portuguese
Origin
This type of marble originates mainly from the Alentejo region of Portugal, particularly around Vila Viçosa, Estremoz, and Borba. This area is rich in marble deposits and is known as the "Marble Capital of Portugal."
Geological Characteristics
Rock Type: Metamorphic rock (marble), primarily composed of calcium carbonate (CaCO₃).
Formation: Formed through the metamorphism of limestone. Under high temperature and pressure, the original limestone recrystallizes, resulting in a fine-grained texture that gives the marble a jade-like quality.
Formation of Veins
The veins in Marble Rosa Portuguese formed during metamorphism, influenced by crustal pressure, hydrothermal infiltration, and mineral movement. The process is as follows:
1. Metamorphism: Limestone, buried deep in the Earth’s crust, undergoes high-temperature and high-pressure transformation into marble, developing fractures.
2. Mineral Flow and Infiltration: Mineral-rich hydrothermal fluids penetrate the fractures, depositing various minerals that create the different vein colors.
3. Pressure Changes and Deformation: Continued tectonic movement compresses the marble, causing the veins to bend, shift, and deform into wave-like or swirling patterns.
4. Weathering and Exposure: As the crust uplifts, the once-hidden veins become visible on the surface, forming the intricate patterns we see in the marble today.
In addition to marble, other types of rocks also have textures formed by mineral flow and infiltration or precipitation.
Colors and Mineral Composition of Veins
Pink: Caused by trace amounts of iron oxide (Fe₂O₃), giving the calcium carbonate a warm pink hue.
White: Formed by pure calcite (CaCO₃), resulting in a clean white or translucent appearance.
Brown: Derived from iron oxides (such as hematite, Fe₂O₃) or clay minerals (such as kaolinite), creating warm brown or yellowish tones.
Gray/Black: Likely due to the presence of graphite or organic material residues.
Blue: The result of trace amounts of copper or sulfide minerals, giving the marble its rare cool-toned veining.
These veins capture the dynamic history of Earth’s interior and represent an artistic crystallization of time and minerals. On the Earth and Mother sculpture, we can clearly see how these veins intertwine, symbolizing the power of the Earth and the flow of life.
簡介
228公園裡有一座大理石雕塑，《大地與母親》是雕刻家 張子隆 的作品，使用了來自葡萄牙的粉紅色大理石(Marble Rosa Portuguese)。這種大理石擁有獨特的粉紅色與流動的紋理，保存著地球的記憶。
雕塑溫潤的線條，如同母親的懷抱，而大理石的紋理則記錄了數億年的地質變化，從海洋沉積到深埋地底、再經歷高溫高壓的變質，最終被雕刻成這座作品。
地質知識：葡萄牙粉紅大理石
產地 這種大理石主要來自 葡萄牙阿連特茹(Alentejo) 地區，特別是維拉維索薩(Vila Viçosa)、埃什特雷莫什(Estremoz)、博爾巴(Borba) 一帶。該區域擁有豐富的大理石礦藏，被譽為「葡萄牙的大理石之都」。
地質學特性
• 岩石類別：變質岩(大理石)，主要由 碳酸鈣(CaCO₃)組成。
• 成因：由石灰岩經變質作用形成，經歷 高溫高壓的重結晶過程，使原本的顆粒變細緻，呈現出如玉石般的質感。
紋理的成因
葡萄牙粉紅色大理石的紋理是在變質過程中形成的，主要受地殼壓力、熱液滲透與礦物流動影響，過程如下：
1.變質作用：石灰岩在地殼深處經高溫高壓作用，變質為大理石，並出現裂隙。
2.礦物流動與滲入：含礦熱液沿著裂隙滲透，沉澱出各種顏色的礦物，形成不同的紋理。
3.壓力變化與變形：地殼運動持續擠壓，紋理可能會彎曲、錯位、變形，形成波浪狀、渦旋狀的花紋。
4.風化與顯現：隨著地殼抬升，原本隱藏在岩石內的紋理逐漸在表面顯現，形成我們今天所見的大理石花紋。
除了大理石，其他種類的岩石也會因礦物流動滲入或是沈積作用形成紋理。
紋理的顏色與成分
• 粉紅色：來自微量鐵氧化物(Fe₂O₃)，使碳酸鈣染上溫暖的粉紅色調。
• 白色：由純方解石(CaCO₃) 沉積形成，呈現潔白或半透明質感。
• 棕色：來自鐵氧化物(如赤鐵礦 Hematite, Fe₂O₃)或黏土礦物(如高嶺石 Kaolinite)，通常呈現溫暖的褐色或黃棕色。
• 灰色/黑色：可能含石墨(Graphite)、有機物殘留。
• 藍色：含少量銅或硫化物礦物，賦予大理石神秘的冷色調。
這些紋理記錄了地球內部的變動歷史，也是時間與礦物的藝術結晶。在雕像《大地與母親》上，我們可以清楚地看到這些紋理如何交織，象徵大地的力量與生命的流動。