变质岩经历压力时,他们是如何改变的?- 江南体育网页版- - - - -地球科学堆江南电子竞技平台栈交换 最近30从www.hoelymoley.com 2023 - 04 - 05 - t19:08:44z //www.hoelymoley.com/feeds/question/9427 https://creativecommons.org/licenses/by-sa/4.0/rdf //www.hoelymoley.com/q/9427 3 变质岩经历压力时,他们是如何改变的? Okama Ksakas //www.hoelymoley.com/users/7285 2017 - 01 - 09 - t14:07:54z 2017 - 01 - 22 - t09:08:10z < p >当变质岩经历压力改变,但他们是如何改变的?他们成为岩石的碎片吗?并不意味着沉积岩和变质岩的区别(在谈到片段岩石)沉积岩石经过风化作用,这使得它们碎片和变质岩经历巨大的压力使它变成碎片? < / p > //www.hoelymoley.com/questions/9427/-/9430 # 9430 6 回答user2821为变质岩经历压力时,他们是如何改变的? user2821 //www.hoelymoley.com/users/2536 2017 - 01 - 09 - t16:24:03z 2017 - 01 - 10 - t12:54:53z < p >时形成变质岩岩石(沉积岩、火成岩或以前的变质岩)在高压力和/或温度。压力和温度力的原子形成新矿物,从而一种新的岩石。它不是必要的支离破碎,但岩石,而通过< em >变形再结晶< / em >到一个新的国家在应对压力和温度的材料重新组织。< / p > < p > < a href = " https://en.wikipedia.org/wiki/Recrystallization_(地质)”rel = " nofollow noreferrer " >再结晶< / >不删除任何材料,它仅仅是一个物理重组紧凑的岩石。如果发生一些化学成分的变化,叫做< em >交代< / em >。在< a href = " https://en.wikipedia.org/wiki/Metasomatism " rel = " nofollow noreferrer " >交代< / >原子其实从岩石或形成的一部分,经常涉及水。< / p > < p >好< A href = " https://en.wikipedia.org/wiki/Petrology " rel = " nofollow noreferrer " >岩石学家< / >通常可以确定什么样的母岩,< em >原岩< / em >,已经变质,到什么程度,但有时很难做承认的区别。较低程度的变质,保存原始岩石的特性。例如你可以看到涟漪,甚至化石石板从源岩或变形结构,但在更高程度的metamorpism越来越难以想象母质的样子。片麻岩形成的砂岩和花岗岩可以非常相似lihology代表变质的条件,而不是原岩。

It can also be difficult to recognize a metamorphic rock. A weathered slate and shale or even granite and gneiss can appear very similar in the field. However, the processes to form the rocks are different and with a closer look at the minerals it can be possible to understand what kind of process that formed the rock.

Metamorphic phases (1, Blueschist facies 2, Eclogite facies 3, Prehnite-pumpellyite-facies 4, Greenschist facies 5, Amphibolite-facies 6, Granulite facies 7, Zeolite facies 8, Albite-epidote-hornfels facies 9, Hornblende-hornfels facies 10, Pyroxene-hornfels facies 11, Sanidinite facies)

The temperature and pressure determine what metamorphic rock you get, but the chemical composition is inherited from the protolith. Degrees of metamorphism are called metamorphic facies. This diagram shows at what depth and temperature a particular rock is formed.

Igneous rocks are formed when a melt hardens to crystals and sedimentary rocks are formed from sediments. All rocks weather if exposed to water and air, and weathered material is transported by rivers to oceans where sandstone can be formed from the sand at the beach and shale from the finer sediments further away from the coast. Igneous rocks can be formed as hot magma intrudes the crust and slowly cools down and minerals are formed or form lava at volcanoes. This is known as the rock cycle and is one of the fundamental, but complicated, concepts in geology. You can read more about the rock cycle e.g. here to learn more about rock types and how they are formed.

//www.hoelymoley.com/questions/9427/-/9431 # 9431 3 回答MaxW为变质岩经历压力时,他们是如何改变的? MaxW //www.hoelymoley.com/users/4685 2017 - 01 - 09 - t16:31:15z 2017 - 01 - 09 - t16:31:15z < p > < a href = " https://en.wikipedia.org/wiki/Metamorphic_rock " rel = " nofollow noreferrer " > < / >变质岩石由地下深处的转换改变。在地下有巨大压力和热。< / p > < p >的转换可以是晶体大小特定的矿物,或不同的矿物质可以事实上形成了。为特定的矿物也有可能不同的晶体结构,这取决于晶体形成的压力和温度。不同的成分和晶体结构将显示在地球化学相图。< a href = " https://en.wikipedia.org/wiki/Geochemical_modeling " rel = " nofollow noreferrer " > < / >地球化学建模可以用来预测的各种反应基于剖面的温度和压力的材料受到。< / p > //www.hoelymoley.com/questions/9427/-/9501 # 9501 2 回答Gimelist为变质岩经历压力时,他们是如何改变的? Gimelist //www.hoelymoley.com/users/725 2017 - 01 - 21 t07:26:52z 2017 - 01 - 21 t07:26:52z < p >现有的答案是正确的,但我想他们想念你的问题的一个重要方面,这是压力的影响。< / p > < blockquote > < p >他们成为岩石的碎片吗?< / p > < /引用> < p >。破碎的岩石是一个相对较低的温度和压力的过程。这是你会看到的东西在近地表环境中。一旦岩石热的压力下,他们不再是脆性,但韧性。这意味着他们可以弯曲和流。认为巧克力:把它放在冰箱里硬的像石头,但是如果你拿出来(当它仍然是固体)变得更容易弯曲,形状和你的手。< / p > < p >和岩石一样。变质岩的一种很常见的特性是折叠:< / p > < p > < A href = " https://i.stack.imgur.com/y6aXZ.jpg " rel = " nofollow noreferrer " > < img src = " https://i.stack.imgur.com/y6aXZ.jpg " alt = "在这里输入图像描述" > < / > <一口> (< A href = " https://commons.wikimedia.org/wiki/File: Agiospavlos_DM_2004_IMG003_Felsenformation_nahe.JPG rel = " nofollow noreferrer " > < / >) < /一口> < / p > < blockquote > < p >并不意味着沉积岩和变质岩的区别(在谈到片段岩石)沉积岩石经过风化作用,这使得它们碎片和变质岩经历巨大的压力使它变成碎片?< / p > < /引用> < p >。巨大的压力实际上能够很好地团结一切而不是碎片。在变质岩有一些碎片,但通常表现为断层作用而不是分裂成碎片(也称为角砾岩化作用)。 Here's an example:

enter image description here(source)

 //www.hoelymoley.com/questions/9427/-/9504 # 9504 2 回答bandybabboon为变质岩经历压力时,他们是如何改变的? bandybabboon //www.hoelymoley.com/users/3315 2017 - 01 - 21 t10:45:13z 2017 - 01 - 22 - t09:08:10z < p >变质可以中途被熔岩在短时间内的状态,它可能是相当艰难的面团面包。你可以想象它的粘度是普通玻璃一样是200度,如果你有一个窗口在200度,可以弯成U形时间从20分钟20秒取决于温度时,它变得更具延展性。而不是沙子,变质热石灰石/粘土/鹅卵石……< / p >

The dough slowly moves and deforms, for example by pressure of buckling tectonics from distant tectonic shocks like rising mountain chains. The chemicals inside the dough disamalgamate and coagulate into chemicals that have easy bond affiliation. Every chemical reacts differently and has more or less strong bonds at a set pressure of metamorphism, different blobs inside the metamorphic rock may be more or less mobile and viscous. You get crystals of different sizes of new materials, more often roundish, sometimes flat (gneiss) indicating the flow/pressure in the dough, the crystals branch out not that differently from ice crystals, they recrystallize re-mineralize. The time and pressure of metamorphosis vary a lot and determine the level of change that happens.

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