pruthvi ki aatanrik sanrachana

pruthvi ki aatanrik sanrachana shalkeeya arthaat paraton ke roop mein hai, jaise pyaaj ke chhilke paraton ke roop mein hote hain. in paraton ki motaai ka seemaankan raasaayanik athva yaantrik visheshataaon ke aadhaar par kiya ja sakta hai. pruthvi ki sabse oopari parat bhooparpati ek thos parat hai, madhyavarti maintal atyadhik gaadhi parat hai aur baahya krod taral tatha aatanrik krod thos avastha mein hai.

pruthvi ki aatanrik sanrachana ke baare mein jaankaari ke sroton ko do hisson mein vibhkt kiya ja sakta hai. pratyaksh srot, jaise jvaalaamukhi se nikle padaartho ka adhyayan, samudrtaleeya chhedan se praapt aankade ityaadi, kam gaharaai tak hi jaankaari upalabdh kara paate hain. doosari or apratyaksh srot ke roop mein bhookampeeya tarangon ka adhyayan adhik gaharaai ki visheshataaon ke baare mein jaankaari deta hai.

pruthvi ki aatanrik sanrachana

anukram

poorvapeethika

pruthvi ke dvaara anya brahmaandeeya pindon, jaise chandrama, par lagaaya jaane wala gurutvaakarshan iske dravyamaan ki ganana ka srot hai. pruthvi ke aayatan aur dravyamaan ke antarsambandhon se iske ausat ghanatv ki ganana ki jaati hai. dhyaatavya hai ki khagolashaastri pruthvi ke parikraman kaksha ke aakaar aur anya pindon par iske prabhaav se iske gurutvaakarshan ki ganana kar sakte hain.

sanrachana

pruthvi ke andar areeya dhanatv Preliminary Reference Earth Model (PREM) ke anusaar.[1]
(PREM) Preliminary Reference Earth Model ke anusaar pruthvi ke andar gurutvaakarshan.[1] Comparison to approximations using constant and linear density for Earth's interior.
pruthvi ki aatanrik sanrachana ka chitraroop mein niroopan 1. mahaadveepeeya bhooparpati – 2. mahaasaagareeya bhooparpati – 3. oopari maintal – 4. nichla maintal – 5. baahya krod – 6. aatanrik krod – A: moho – B: vishrt-guttenabarg asaatatya – C: boolen-lehamain asaatatya.

yaantrik lakshanon ke aadhaar par pruthvi ko [[|sthalamandal|sthalamandal]], esthenosfeeyar, madhyavarti maintal, baahya krod aur aatanrik krod me banaata jaata hai. raasaayanik sanrachana ke aadhaar par bhooparpati, oopari maintal, nichla maintal, baahya krod aur aatanrik krod mein baaainta jaata hai.

gaharaai Layer
kilometer meal
0–60 0–37 sthalamandal (sthaanik roop se 5 aur 200 kimi ke beech parivrtanasheel)
0–35 0–22 … bhooparpati (parivrtanasheel 5 se 70 kimi ke beech)
35–60 22–37 … sabse oopari maintal
35–2,890 22–1,790 maintal
100–200 62–125 … durbalata mandal (esthenosfiyr)
35–660 22–410 … oopari maintal
660–2,890 410–1,790 … nichla maintal
2,890–5,150 1,790–3,160 baahya krod
5,150–6,360 3,160–3,954 aatanrik krod

pruthvi ke antaratam ki yeh paratadaar sanrachana bhookampeeya tarangon ke sanchalan aur unke paraavartan tatha pratyaavartan par aadhaarit hai jinka adhyayan bhookanpalekhi ke aaainkadon se kiya jaata hai. bhookamp dvaara utpann praathamik evam dviteeyak tarangein pruthvi ke andar snel ke niyam ke anusaar pratyaavartit hokar vakraakaar path par chalti hain. jab do paraton ke beech ghanatv athva raasaayanik sanrachana ka achaanak parivartan hota hai to tarangon ki kuchh oorja vahaaain se paraavartit ho jaati hai. paraton ke beech aisi jagahon ko asaatatya () kehte hain.


bhooparpati

bhooparpati pruthvi ki sabse oopari parat hai jiski ausat gaharaai 24 kimi tak hai aur yeh gaharaai 5 kimi se 70 kimi ke beech badalti rahati hai. samudron ke neeche yeh kam moti samudri besaaltik bhooparpati ke roop mein hai to mahaadveepon ke neeche iska vistaar adhik gaharaai tak paaya jaata hai. sarvaadhik gaharaai parvaton ke neeche pai jaati hai. bhooparpati ko bhi teen paraton mein baaainta jaata hai - avasaadi parat, grenaaitik parat aur besaaltik parat. grenaaitik aur besaaltik parat ke madhya konaard asaatatya paaya jaata hai. dhyaatavya hai ki samudri bhooparpati keval besaalt aur gaibro jaisi chattaanon ki bani hoti hai jabki avasaadi aur grenaaitik paratein mahaadveepeeya bhaagon mein pai jaati hain.

bhooparpati ki rachana mein sarvaadhik maatra aakseejan ki hai. Edward sves ne ise siyaal naam diya tha kyonki yeh silika aur elyuminiym ki bani hai. vastut: yeh siyaal mahaadveepeeya bhooparpati ke avasaadi aur grenaaitik paraton ke liye sahi hai. konaard asaatatya ke neeche seema (silika+maigneeshiym) ki parat shuroo ho jaati hai. bhooparpati aur maintal ke beech ki seema mohorovikik asaatatya dvaara banti hai jise moho bhi kaha jaata hai.

maintal

vishv maanachitr par moho ki gaharaai

maintal ka vistaar moho se lekar 2890 kimi ki gaharaai par sthit guttenbarg asaatatya tak hai. maintal ke is nichli seema par daab ~140 GPa paaya jaata hai. maintal mein sanvahaneeya dhaaraaeain chalti hain jinke kaaran sthalamandal ki pleton mein gati hoti hai. maintal ko do bhaagon mein baaainta jaata hai oopari maintal aur nichla maintal aur inke beech ki seema 710 kimi par repiti asaatatya ke naam se jaani jaati hai. maintal ka gaadhaapan 1021 se 1024 Pa·as ke beech paaya jaata hai jo gaharaai par nirbhar karta hai. [2] tulana ke liye dhyaatavya hai ki paani ka gaadhaapan 10−3 Pa·as aur kolataar (pitch) 107 Pa·as hota hai.

krod

krod ka vistaar maintal ke neeche hai aarthaat 2890 kimi se lekar pruthvi ke kendra tak. kintu yeh bhi do paraton mein vibhkt hai - baahya kor aur aatanrik kor. baahya kor taral avastha mein paaya jaata hai kyonki yeh dviteeyak bhookampeeya tarangon (S-tarangon) ko sokh leta hai. aatanrik krod ki khoj 1936 mein ke. E. boolen ne ki thi. yeh thos avastha mein maana jaata hai. in donon ke beech ki seema ko boolen-lehamain asaatatya kaha jaata hai.

aatanrik krod mukhyat: lohe ka bana hai jismein nikal ki bhi kuchh maatra hai. chooainki baahya krod taral avastha mein hai aur ismein rediyodharmi padaartho aur vidyut aaveshit kanon ki kuchh maatra pai jaati hai, jab iske padaarth dhaara ke roop mein aatanrik thos krod ka chakkar lagte hain to chunbakeeya kshetr ban jaata hai. pruthvi ke chumbakatv ya bhoochumbakatv ki yeh vyaakhya daainemo siddhaant kahalaati hai.


aitihaasik vikaas

puraane mat

  • Edward sves ki sankalpana-
  • daali ka mat-
  • aarthar homs ki sankalpana-
  • vaan dar graat ki sankalpana-

aadhunik mat

boolen ka maadal

PREM maadal


aur dekhein

sandarbh

  1. a aa A. M. Dziewonski, D. L. Anderson (1981). "Preliminary reference Earth model". Physics of the Earth and Planetary Interiors 25 (4): 297–356. doi:10.1016/0031-9201(81)90046-7. ISSN 0031-9201. PMC 411539. http://www.gps.caltech.edu/uploads/File/People/dla/DLApepi81.pdf.
  2. Uwe Walzer, Roland Hendel, John Baumgardner Mantle Viscosity and the Thickness of the Convective Downwellings