#mining Geology ⚒️
5th largest open pit in the world 👀
Diavik Diamond Mine - CANADA
The diavik diamond mine lies within the pre-Cambrian rocks of the Slave Geological Province, which is characterised by several deposits of gold, copper, zinc and diamonds. The underground mine was developed at a cost of approximately $800m.
Greywacke-mudstone metaturbidites, tonalite-quartz diorite, and two-mica granite
Open pit and underground
300km northeast of Yellowknife, capital of Canada's Northwest .
Credits - @rocksforthespirit 😍
Garnets are a group of silicate minerals that have been used since the Bronze Age as gemstones and abrasives. All species of garnets ... Crystal habit: Rhombic dodecahedron or cubic
Crystal system: Isometric
Optical properties: Single refractive, often anomalous double refractive
Visited Sangumburi Pit crater, located on the southeast side of Jeju Island, Korea.
Unlike the 360 and more parasitic volcanoes on the island, this one exploded quickly, but did not spew much lava nor did it form much of a surrounding cone.
Sangumburi crater, designated as Korea's Natural Monument No.263, recognized as a maar, but precise geological mapping and geological characteristics in the field indicate that Sangumburi crater is a Pit crater, formed
at 0.073±0.036 Ma.
The inner area is 300,000㎡, while the interior bottom circumference is 756m, and the exterior circumference is 2,070m. Nearly vertical, the crater is approximately 130m tall, making it slightly larger and deeper than Hallasan mountain.
Rare species of plants and animals live inside the crater. Diverse trees such as cedar trees, Korean fir trees and eulalia inhabit the crater.
In the autumn and winter, the crater is covered with the colonies of silver grass, attracting many visitors all over the country.
A well-paved path leads from the parking area to the viewing area which has a small pavilion and several vista points. Also on the grounds are numerous grave sites made in traditional Jeju fashion: a wide, trapezoidal stone wall surrounding the burial mound.
On our way up to the crater, we were greeted by flame grass shrouded in golden light.
We walked over to the crater. It was a deep hole in the ground, like a huge pit.
Gypsum is a very soft & fragile stone. It is easily detected by touching the surface of the cliff. Liquid water slowly dissolves the rock. And also, freezing and expanding, water tears the rock apart. These are billions of tiny cracks and cavities, but some of them are bigger, and some are really huge. Large cave systems are an example. The dissolution process never stops, it goes both on the surface and inside in the flesh of the stone /
Гипс - очень хрупкий камень. Это легко почувствовать, прикоснувшись к поверхности скалы. В жидком состоянии вода медленно растворяет породу. А когда вода замерзает и расширяется, она разрывает камень на части. Это миллиарды крошечных трещин и полостей, правда некоторые из них побольше, а некоторые действительно огромны. Например, пещерные системы. И этот процесс растворения никогда не прекращается, он происходит как на поверхности, так и внутри, в теле камня /
Gips ist ein sehr zerbrechlicher Stein. Dies ist leicht zu verstehen, wenn Sie die Oberfläche einer Klippe berühren. Flüssiges Wasser löst den Stein langsam auf. Und wenn das Wasser gefriert und sich ausdehnt, bricht es einen Stein. Dies sind Milliarden winziger Risse und Hohlräume, einige groß und einige wirklich riesig. Ein Beispiel sind große Höhlensysteme. Der Auflösungsprozess hört nie auf, er findet sowohl oberflächlich als auch innerlich im Fleisch des Steins statt
169157 hours ago
#News sulle #frane di #Marte !
Sul pianeta rosso sono state osservate frane molto grandi, in grado di mobilitare materiali immensi con velocità che possono raggoungerr i 360 km/h per decine di chilometri.
Un nuovo studio, pubblicato su Nature Communications, è stato condotto da alcuni ricercatori
mediante modelizzazioni di grane ed osservazioni di dettaglio sulla #VallesMarineris , una valle presente su Marte composta da un canyon rettilineo lungo più di 4000 km e profondo più di 8 km che si trova a sud dell’equatore marziano.
Precedenti interpretazione basate sull'analisi geomorfologica delle frane avevano ipotizzato una precedente copertura di ghiaccio .
Tuttavia con questo nuovo studio, calcolando lo spessore delle stesse frane e la lunghezza delle creste nonché varie altre caratteristiche, si è giunti alla conclusione che: "la presenza del ghiaccio non può essere considerata come una condizione necessaria per la produzione di creste del genere. Queste ultime potrebbero essersi formate a causa di particolari strati sottostanti fatti di rocce instabili e leggere creati a loro volta da vibrazioni collisioni di particelle di roccia. Si tratterebbe di un “processo di convezione”, ossia di un trasferimento di calore causato dal movimento, che causa la caduta di strati di roccia più pesanti e densi e di rocce più leggere"
“Approximately 280 million years ago the ice that had once covered the area of Hallett Cove Conservation Park began to melt causing a lake to form in that area. During this time many sediments were deposited into the lake which after many years turned to rock. This rock is the beautiful, unusual shaped rock we see today that is known to some as the main feature of the park named the Sugarloaf.
It has been raining continuously in Taipei from last 3 days I've been here, and with he weekend approaching I was planning a hike and a trip exploring nature in Taiwan. On checking the weather forecast, it warned and advised that it's going to be extremely heavy rains in Taipei, and the nearby areas I was planning to explore. Hence, no friends were willing to join and I slept late and decided to take longer rest today morning as it was raining non-stop. Around 1pm, I woke up and found out that rain has stopped and weather advisory has also changed in last 12 hours, and a friend outside just messaged, "Take umbrella. Go out & Explore." That's it. I geared up and was already on my way to Yehliu Geopark to explore before it gets dark and closed in evening. Sometimes in life, these simple yet powerful words brings all the magic in our life, at the right time. (that even weather advisors can't bring) I am glad I had a blast of the time amd grateful for the quality time there in nature - walking alone along the seashore, listening to birds and ocean waves, protecting from heavy winds, daring the dark woods, and watching the sunset and moonrise. Presenting a short video of today's adventure, hope you'll like it. Please show your love and share your feedback in comments. Thanks. .
.. About Yehliu GeoPark:
Yehliu Geology Park at Wanli (Taipei) is a 1700m long cape on a small peninsula, was formed thousands of years ago due to powerful volcanic eruptions. It is full of sea water-eroded holes and fossils, as well as orange-brown volcanic rocks in the shapes of mushroom, candles, ginger, chessboard, etc. and in the shape of honeycomb, because the rock layer of nearby seashore contains limestone that's subjected to marine erosion, weathering, strong winds and earth movements, and making it rich with ecological resources and prosperous fishing village site.
Islas Aleutianas, Alaska 🇺🇲🇷🇺📍🌋La Fosa Aleutiana (o Fosa Aleutiana) es una zona de subducción y una fosa oceánica que se extiende a lo largo de la costa sur de Alaska y las aguas adyacentes del noreste de Siberia frente a la costa de la península de Kamchatka. Está clasificada como una "trinchera marginal" en el este, ya que se extiende a lo largo del margen del continente.
La trinchera da origen al arco insular de las Islas Aleutianas, donde atraviesa el mar abierto. La trinchera se extiende por 3.400 km desde un cruce triple en el oeste con la falla de Ulakhan y el extremo norte de la trinchera Kuril-Kamchatka, hasta un cruce con el extremo norte del sistema de fallas de la Reina Charlotte en el este. La Fosa Aleutiana es un límite de placa convergente. La trinchera forma parte del límite entre dos placas tectónicas. Las Islas Aleutianas son una cadena de 14 islas volcánicas grandes y 55 más pequeñas, que forman parte del Arco Aleutiano en el Océano Pacífico Norte. Las islas, con sus 57 volcanes, se encuentran en la parte norte del Anillo de Fuego del Pacífico. 📸: @chrisburkard
The present is the key to the past.
Pseudo Fault Breccia.
According to my lastest field in Kanchanaburi, Thailand. I was found somethings that very interesting. Firstly I was thinking that was a fault breccia, but I was not found some evidence of fault. Until I saw the photo that was sent from my friend in Chaingmai, Thailand. He is a geologist in the tunnel. He sent me a photo of the limestone breccia(loosed from fault) and sand(from nearby weathered granite) in the cavity that is under surface 400 meters (not lithified). So I got an idea of my field, but it was different in the matrix that filled in the cavity. That was called Neptunian Dyke.
(one of the structures in Karst topography)
Fig.1: Neptunian dyke with the dextral strike-slip fault (look from the cave, under bedding).
Fig.2: Close up of Neptunian dyke (breccia).
Fig.3: Limestone breccia and said in the cavity, Still not lithified
Fig.4: The present is the key to the past.
A close look at Boogardie orbicular granite with a pegmatite vein.
This unusual granitic rock was collected from Boogardie Station, located 35 km west of Mount Magnet in #WesternAustralia , one of a few orbicular #granite localities known worldwide. The orbicular granite is hosted by a pink, medium-grained, late Archean granitic rock, comprising myrmekitic biotite granodiorite that becomes tonalitic in places. Information from diamond drillholes indicates that orbicular granite bodies may have formed as saucer-shaped, sill-like structures within the host granodiorite–tonalite. Over the area of the Boogardie quarry, the orbicular granite appears as an oval-shaped body, about 40 m wide and at least 55 m long. Maximum thickness at the centre is 11.4 m, tapering off in all directions to relatively small thicknesses at the outer rims.
Image: Mike Fetherston. #geology#geologicalsocietyoaustralia#geological#science#research#learning
49547 December, 2019
Visited Suwolbong Peak located at the western end of Jeju Island, Korea.
At the observatory located at the peak of Suwolbong Peak, visitors can see Chagwido Island, Songaksan mountain, Dansan mountain, and Jukdo Island in one glance, and can even observe Sarabong with binoculars.
Suwolbong is part of a tuff ring made by hot ascending magma interacting explosively with groundwater and only part of the ring-shaped volcano remains. This volcanic tuff ring is prized for the richness of its geological history with the diverse depositional structures.
Also known as the 'textbook of volcanology', the tuff ring was designated as the Natural Monument of Korea(No.513) and as one of 9 Global Geoparks of Jeju Island in 2010.
To the north, off the coast, is the Chagwido Island, where only the top peak area has grass growing, and the rest of the island is made up of dark volcanic rocks and cliffs.
This island is also famous for the filming site of "The Terrifying Mercenary Baseball Team" in 1986.
The Suwolbong Geopark Trail includes Suwolbong, Dangsanbong, and Chagwido Island.
It is also famous for being a favorite sunset viewing place.
It is truly an awesome sight to behold.
La pizarra es una roca foliada de grano muy fino (menos de 0,5 milímetros) compuesta de pequeñas escamas de mica que son demasiado pequeñas para ser visibles.
Por lo tanto, generalmente parece opaca y se parece mucho a la lutita y limolita.
La pizarra se genera con mayor frecuencia por el metamorfismo de bajo grado (facies metamórficas de zeolita a esquisto verde) procedente de la lutita o limolita.
La lutita es una roca sedimentaria de grano fino que se forma a partir de la compactación de partículas minerales de arcilla que comúnmente llamamos “lodo y lodolita“. La lutita se distingue de otras rocas sedimentarias de lodo porque tiene característica físil y laminada. @geologochacin#geologist_online