Ubudlelwano Phakathi Kwejubane Lamagagasi E-Seismic kanye Nohlobo Lwamadwala
I-Pendahuluan
Izinhlekelele zemvelo ezifana nokuzamazama komhlaba zivame ukubangela umonakalo omkhulu futhi ziyindaba ekhathazayo emazweni amaningi, ikakhulukazi lawo atholakala ezindaweni ezivame ukuzamazama komhlaba. Amagagasi okuzamazama komhlaba adlala indima ebalulekile ekutholeni nasekuqondeni ukuzamazama komhlaba. Ijubane lamagagasi okuzamazama komhlaba, kokubili amagagasi ayisisekelo (P) kanye nawasesibili (S), lithonywa kakhulu uhlobo oluphakathi noma lwamatshe ahamba ngalo. Lesi sihloko sizohlola ukuthi uhlobo lwamatshe lungathinta kanjani isivinini samagagasi okuzamazama komhlaba kanye nemiphumela yalobu budlelwano ezifundweni ze-geological kanye nokunciphisa izinhlekelele.
Amagagasi Okuzamazama: P kanye no-S
Amagagasi okuzamazama komhlaba ahlukaniswe ngezinhlobo eziningana ngokusekelwe endleleni asakazeka ngayo kanye nendawo adlula kuyo. Izinhlobo ezimbili eziyinhloko amagagasi e-P (ayinhloko) kanye namagagasi e-S (awesibili).
1. Amagagasi e-P (Ayinhloko): Lawa magagasi angamagagasi okuqala okuzamazama komhlaba atholakala ngama-seismometer ngemva kokuzamazama komhlaba. Angasakazeka kuzo zonke izinhlobo zezinto eziphilayo: izinto eziqinile, uketshezi, kanye namagesi. Amagagasi e-P anesivinini esiphezulu kunamagagasi e-S ngoba asakazeka ngokucindezelwa nokwandiswa kwezinto.
2. Ama-S-wave (Esibili): Ama-S-wave eza ngemuva kwama-P-wave, futhi angasakazeka kuphela ngokusebenzisa imithombo exinene. Ama-S-wave abangela ukuthi izinhlayiya ezikuyo zihambe ziqonde ngqo lapho kusakazeka khona amagagasi, okubangela ukuguquka okuphawulekayo kwezinto uma kuqhathaniswa nama-P-wave.
Ijubane Lamagagasi Okushukuma Kwezwe Ezinhlotsheni Ezihlukahlukene Zamadwala
Ijubane lamagagasi okuzamazama komhlaba lithonywa izici ezahlukahlukene, okuhlanganisa ubuningi kanye nokunwebeka kwendawo ahamba kuyo. Uhlobo lwedwala lungenye yezinto eziyinhloko ezinquma ijubane lala magagasi:
1. Idwala LaseBasaltic:
I-Basalt iyidwala elivamile lentaba-mlilo elinesakhiwo esiqinile nesiqinile. Isivinini samagagasi e-P ku-basalt singafinyelela ku-6-7 km/s, kanti isivinini samagagasi e-S singafinyelela ku-3.5-4.5 km/s. Ubuningi obukhulu kanye nokunwebeka kwe-Basalt kuvumela amagagasi okuzamazama komhlaba ukuba asakazeke ngokushesha.
2. Amatshe e-Granitic:
I-Granite iyidwala elihlaselayo elivame ukuba lukhuni futhi libe lukhuni kunedwala eliyi-sedimentary. Ijubane le-P-wave ku-granite lisukela ku-4.5 kuya ku-6 km/s, kanti ijubane le-S-wave lisukela ku-2.5 kuya ku-3.5 km/s. Ubuningi obukhulu kanye nokuntuleka kwe-porosity ku-granite kuvumela ukudluliswa kwamagagasi okusheshayo.
3. Amadwala Anezinsila:
Amatshe asemadwaleni afana netshe lesihlabathi kanye netshe elithambile anejubane eliphansi lamagagasi okuzamazama komhlaba kunamatshe angenawo umoya kanye nalawo ashintshashintshayo. Ijubane lamagagasi e-P etsheni lesihlabathi lingasukela ku-2-4 km/s, kanti ijubane lamagagasi e-S lisukela ku-1-2 km/s. Lokhu kungenxa yobuningi bawo obuphezulu kanye nobuningi obuphansi uma kuqhathaniswa namatshe acwebezelayo.
4. Amadwala Ashintsha Ukwakheka:
Amatshe e-metamorphic njenge-schist ne-gneiss anejubane lamagagasi elihlukahlukene kuye ngokuthi izinga le-metamorphism kanye nokwakheka kwawo kwamaminerali lingakanani. Ijubane lamagagasi e-P ku-gneiss, isibonelo, lingafinyelela ku-5–6 km/s, kanti ijubane lamagagasi e-S lingafinyelela ku-2.5–3.5 km/s.
5. I-Limestone ne-Dolomite:
I-limestone ne-dolomite kuyizinhlobo zamatshe e-carbonate avame ukutholakala oqweqweni loMhlaba. Isivinini se-P-wave ku-limestone sisukela ku-4-5 km/s, kanti isivinini se-S-wave singafinyelela ku-2-3 km/s. Lawa matshe ane-porosity eguquguqukayo, engathinta kakhulu isivinini samagagasi okuzamazama komhlaba.
Izici Ezithinta Ijubane Lamagagasi Okuzamazama
Ezinye izici ezengeziwe ezithinta ijubane lamagagasi okuzamazama komhlaba emadwaleni zifaka:
1. Ubuningi:
Uma idwala lilukhuni, amagagasi okuzamazama komhlaba angahamba ngokushesha. Lokhu kungenxa yokuthi ukudlidliza ezintweni ezixinene kungadluliselwa kahle kakhulu kunasezintweni ezikhululekile.
2. I-Modulus ye-Elasticity:
Amapharamitha okunwebeka njenge-modulus kaYoung kanye ne-shear modulus anquma ukuthi amagagasi angahamba ngokushesha kangakanani endaweni ephakathi nendawo. Amatshe ane-modulus enwebekayo ephezulu avumela amagagasi ukuba ahambe ngokushesha.
3. Ukubhoboka:
Amatshe anezimbobo eziningi anezikhala ezingenalutho ezinciphisa ukusabalala kwamagagasi ngoba amandla amagagasi amuncwa noma aphendukezelwa yizimbobo edwaleni.
4. Okuqukethwe kwamanzi:
Ukuba khona kwamanzi ezimbotsheni zamadwala kungathinta ijubane lamagagasi okuzamazama komhlaba, ngokuvamile ngokuwanciphisa. Amanzi ezimbotsheni anciphisa izibopho phakathi kwezinhlayiya, okuphoqa amagagasi ukuba adlule endaweni ethambile, noma eqine kakhulu.
Imiphumela Ezifundweni Ze-Geological kanye Nokunciphisa Izinhlekelele
Ukuqonda isivinini samagagasi okuzamazama komhlaba kanye nobudlelwano bawo nezinhlobo zamadwala kunemiphumela ebalulekile emikhakheni eyahlukahlukene:
1. Ukuhlola Kwezinto Eziphilayo:
Ngokuhlela ijubane lamagagasi okuzamazama komhlaba endaweni ethile, izazi ze-geophysics zinganquma uhlobo kanye nokusabalala kwamatshe ngaphansi komhlaba. Lokhu kubalulekile ekuhlolweni kwamaminerali kanye ne-hydrocarbon.
2. Ukunciphisa Izinhlekelele:
Ukwazi ijubane lamagagasi okuzamazama komhlaba kanye nohlobo lwedwala endaweni kungasiza ekwakheni izakhiwo ezingamelani nokuzamazama komhlaba. Izakhiwo ezakhiwe edwaleni eliqinile futhi eliqinile zivame ukungathinteki kakhulu ukuzamazama komhlaba kunalezo ezakhiwe enhlabathini evulekile, enezimbobo.
3. Ukumapha Kwezingozi Zokuzamazama:
Ngokuqonda ijubane kanye nokuziphatha kwamagagasi okuzamazama komhlaba ezinhlotsheni ezahlukene zamadwala, ososayensi bangakha amamephu engozi yokuzamazama komhlaba anembe kakhudlwana. Lolu lwazi lubaluleke kakhulu ekuhleleni indawo kanye nasekuthuthukisweni kwengqalasizinda ephephile.
4. Ucwaningo Lwesayensi:
Ucwaningo lwejubane lamagagasi okuzamazama komhlaba emadwaleni ahlukahlukene luphinde lunikeze ukuqonda okubalulekile ngokwakheka kwangaphakathi koMhlaba kanye nesakhiwo sawo. Lokhu kusiza ososayensi ukuqonda izinqubo ezijulile ze-geological, njengokunyakaza kwamapuleti e-tectonic kanye nokuguquguquka kwengaphakathi loMhlaba.
Isiphetho
Ubudlelwano phakathi kwejubane lamagagasi okuzamazama komhlaba kanye nohlobo lwamadwala kuyisihloko esiyinkimbinkimbi kodwa esibalulekile ku-geophysics kanye nokunciphisa izinhlekelele zemvelo. Ubuningi, ukugoba, ukunwebeka, kanye nokuqukethwe kwamanzi kwamadwala konke kudlala indima ebalulekile ekunqumeni ukuthi amagagasi okuzamazama komhlaba angahamba ngokushesha kangakanani. Lolu lwazi alusizi nje kuphela ekuqondeni ukuzamazama komhlaba nokunciphisa umonakalo wawo, kodwa futhi lunezisetshenziswa ezisebenzayo ekuhlolweni kwezinsiza zemvelo kanye nokuhlela ingqalasizinda ekwazi ukumelana nezinhlekelele. Ngokuqhubeka nokuthuthukisa ucwaningo kulo mkhakha, singalindela ukuthola izinto ezintsha ezizosisiza siqonde futhi sivikele iplanethi yethu kangcono.
