Chii chinonzi Isostasy uye Zvazvinoreva
Isostasy ipfungwa ye geophysical inoreva mamiriro ekuenzana kwesimba regiravhiti pakati peganda rePasi (lithosphere) ne mantle iri pasi (asthenosphere). Dzidziso iyi inheyo yakakosha yekunzwisisa mashandiro emukati mePasi, ichitsanangura kuti huremu hunotamiswa sei kuti uwane kuenzana kwesimba regiravhiti. Muchinyorwa chino, tichaongorora pfungwa huru ye isostasy, mashandiro ayo, uye zvazvinoreva kune zvakasiyana-siyana zve geology uye zvakatipoteredza.
Nhoroondo uye Dzidziso Yekutanga yeIsostasy
Pfungwa ye isostasy yakatanga kutaurwa muzana remakore rechi19 nemasayendisiti akadai saJohn Pratt naGeorge Airy, avo vaiedza kutsanangura mutsauko uripo pakukwira kwepasi. Masayendisiti maviri aya akapa mamodheru akasiyana ekutsanangura isostasy. Pratt akataura kuti goko repasi rine density inosiyana zvichienderana nekukwira, zvekuti nzvimbo dzakakwirira dzine density yakaderera. Kune rumwe rutivi, Airy akataura kuti goko repasi rine ukobvu hwakasiyana, asi hune density inogara iripo; nzvimbo dzakakwirira "dzinoyangarara" paganda rakanyanya kusimba nekuti goko radzo rakakora.
Isostasy inogona kufananidzwa nengarava iri kunyura pamusoro pemvura: inonyura zvakadzika sezvo huremu hwayo huchiwedzera, uye inokwira zvakanyanya sezvo huremu hwayo huchiderera. Saizvozvowo, nekukura kwePasi, nzvimbo dzakakora, dzakadai semakomo, dzinonyura zvakadzika mukati menzvimbo yakapoteredza, nepo nzvimbo dzakareruka, dzakadai semipata, dzichikwira zvakanyanya.
Nzira yekushanda yeIsostasis
Goko rePasi rine lithosphere yakasimba uye asthenosphere yepurasitiki inogona kuyerera pamusoro penguva dze geological. Kana huremu hwepamusoro pePasi hwachinja, lithosphere ichaedza kuwana kuenzana kutsva nekuyerera kwezvinhu mukati kana kubuda muasthenosphere.
Kune nzira dzinoverengeka huru dzinoshandiswa ne isostasy:
1. Kukora uye Kutetepa kweCrustal: Semuenzaniso, kana makomo achiumbwa kuburikidza nemaitiro e tectonic, goko rePasi rinokora uye rinonyura zvakadzika mu asthenosphere. Kusiyana neizvi, nzvimbo dzine dambudziko rekukukurwa kwevhu kana kunyunguduka kwechando "dzinosimuka" nekuda kwehuremu hwadzo hwakareruka.
2. Kutakura neKudzoreredza Mvura muGlacial: Munguva yechando, machira echando akakora anodzvanya pasi peganda rePasi, zvichikonzera kudzikira kweganda. Kana chando chanyunguduka, kumanikidzwa kunoderedzwa uye ganda rinotanga "kudzokera shure," kana kukwira. Maitiro aya anonzi isostatic rebound.
3. Kutamiswa kweMarara: Kutamiswa kweMarara mumiromo yenzizi kana mugungwa kunogonawo kukonzera shanduko mukumanikidzwa mu lithosphere, iyo inozogadziriswa kuti iwane kuenzana kwe isostatic.
Migumisiro yeIsostasy
Pfungwa ye isostasy ine zvazvinoreva zvakawanda mu geology, kusanganisira kuumbwa kwemakomo, tectonic activity, nezvimwe zviitiko zvezvakatipoteredza. Heano mimwe mienzaniso yezvakakosha zve isostasy:
1. Kuumbwa uye Kukukurwa kweMakomo:
– Makomo marefu, akakora, akadai seHimalayas, anonyura muchikamu chepasi kuti awane kuenzana kwezvikamu. Kana kukanganiswa kwemakomo kwatanga kuderedza huremu hwegomo, goko riri pasi rinokwira zvakare. Maitiro aya anotsanangura chikonzero nei makomo achiwanzogara akareba zvakadaro pasinei nekukanganiswa kukuru kwemakomo.
2. Kudzoka kweIsostatic:
– Nzvimbo dzaimbofukidzwa nechando munguva yekupedzisira yechando, dzakadai seScandinavia neCanada, dzichiri kusangana nekudzoka kwemvura inoputika pasi rose sezvo ganda repasi rinochinja mushure mekufambiswa kwechando kukuru. Maitiro aya anokanganisa topography, maitiro ekuyerera kwerwizi, uye kunyange mwero wegungwa munzvimbo dzakapoteredza.
3. Kugadzikana Kwenguva Refu Kwegomba Renyika:
– Isostasy inobatsira kuchengetedza kugadzikana kwenguva refu kweganda rePasi. Pasina nzira iyi, dzimwe nzvimbo dzepasi dzinogona kusangana nekushanduka-shanduka kwakanyanya uye kusarongeka, izvo zvinogona kukonzera mamwe matambudziko, akadai sekudengenyeka kwenyika uye kusagadzikana kwezvakatipoteredza.
4. Kutsvaga Zviwanikwa Zvisikwa:
– Kunzwisisa isostasy kwakakoshawo mukutsvaga peturu, gasi rechisikigo, uye zvicherwa. Kuchinja kweisostatic kunogona kukanganisa kupararira kwemadhaka uye maumbirwo ejeologi, izvo zvinokanganisa mukana wekuwana zviwanikwa zvechisikigo.
5. Kukanganisa Kwazvinoita Pamamiriro Ezvinhu:
– Kudzoka kwemvura kubva mugungwa kuenda mugungwa uye kufamba kwegungwa kunogona kuchinja nzvimbo dzekugara, kuumba madhamu matsva, uye kuchinja kuyerera kwenzizi. Izvi zvinogona kuva nemigumisiro yakanaka neyakaipa pamamiriro ekunze enzvimbo.
Mhedziso
Isostasy ipfungwa huru mu geology inotsanangura kuti goko rePasi rinowana sei kuenzana kwegiravhiti nekugadzirisa huremu hwaro. Kubva payakatangwa nevasayendisiti vezana remakore rechi19, dzidziso iyi yakabatsira kutsanangura zvakasiyana-siyana zve geology, kubva pakuumbwa kwemakomo kusvika pakudzoserwa kwemvura mushure mechando.
Kunze kwekunge chiri chinhu chakakosha pakunzwisisa mashandiro emukati mePasi, isostasy inewo zvayakanakira zvakawanda kune tekinoroji nenzvimbo, kusanganisira kubatsira mukutsvaga zviwanikwa zvechisikigo uye kudzidza nezvekuchinja kwemamiriro ekunze. Saka, isostasy inokosha kwete chete kune vanoongorora geology nevasayendisiti vepasi, asiwo kune veruzhinji nekuda kwemhedzisiro yayo pahupenyu hwedu hwezuva nezuva nenzvimbo dzechisikigo dzakatikomberedza. Kuramba tichidzidza nekunzwisisa isostasy kuchaita kuti tikwanise kutarisira nekuchengetedza pasi redu ratinorarama zviri nani.
