ari magnetic matombo uye magineti ematombo ane hukama nemagnetism yemaminerari, iyo yakakosha zvikuru pakunzwisisa kwemagnetic geophysical exploration nzira. Mazhinji emaminerari ekugadzira dombo anoratidza kuderera kwemagnetic susceptibility, uye chikonzero matombo ari magineti ndechekuti chikamu chemagineti mamineral chaainacho chinowanzo chidiki. Mapoka maviri chete ezve geochemical anopa matombo nemaminerari aya uye magineti.
Muchikamu chino tichakuudza zvose zvaunoda kuziva pamusoro pematombo emagetsi, maitiro avo emagnetism emaminerari.
Chii chinonzi magnetic matombo
Iron-titanium-oxygen boka ine zvigadziriso zvakasimba zvehuwandu hwemagineti emaminerari kubva kumagnetite (Fe3O4) kusvika kuulvöspinel (Fe2TiO4). Imwe mhando yakajairika yesimbi oxide hematite (Fe2O3) ndeye antiferromagnetic uye saka haikonzeri magineti abnormalities. Iyo iron-sarufa base inopa iyo magnetic mineral pyrrhotite (FeS1 + x, 0 iyo ine tembiricha yeCurie ye578 ° C.
Kunyangwe saizi, chimiro uye kugoverwa kwemagineti zvimedu mudombo zvichakanganisa maitiro ayo magineti, zvine musoro kurongedza magineti maitiro edombo zvichienderana neayo ese magineti.
Mhando dzemagineti matombo
Nekuda kwehuwandu hwawo hwepamusoro hwemagineti, matombo makuru egneous anowanzo matombo emagetsi. Chiyero chemagnetite mumatombo egneous chinodzikira nekuwedzera acidity, saka kunyangwe acidic igneous matombo ane akasiyana magineti maitiro, iwo magineti maitiro anowanzo kuderera pane aya ematombo ekutanga.
Iwo magineti maitiro emetamorphic matombo anochinjawo. Kana iyo chikamu chekumanikidzwa kweokisijeni yakaderera, magnetite ichadzoserwa zvakare uye simbi neokisijeni zvichabatana nemamwe mamineral phases sezvo dhigirii remetamorphism rinowedzera. Zvisinei, iyo yakanyanyisa kudzvinyirira kweokisijeni inogona kutungamirira pakuumbwa kwemagnetite, iyo inoshanda seyamubatsiri mineral mune metamorphic reaction.
Kazhinji kutaura, magineti emukati uye magineti susceptibility ematombo anosiyana zvakanyanya, uye panogona kuve nekupindirana kukuru pakati pemathologies akasiyana. Rini magineti anomalies anoonekwa munzvimbo dzakafukidzwa sediment, anomalies anowanzo kukonzerwa nepasi pegineous matombo kana metamorphic basement kana intrusive sediments.
Zvikonzero zvinowanzoitika zvemagineti anomalies zvinosanganisira marevhi, kukanganisa, kupeta kana kudonha uye kuyerera kwebota, nhamba huru yekupindira kwekutanga, metamorphic basement matombo, uye miviri yemagnetite ore. Hukuru hwemagineti anomaly hunobva pamakumi enT munzvimbo yakadzika metamorphic basement kusvika kumazana enT mumuviri unopindirana, uye ukuru hwemagineti emaminerari hunogona kusvika zviuru zvakati kuti nT.
Magnetic munda uye kukosha
Mushure memakore matatu ekuunganidza data, kusvika ikozvino yakadhindwa mepu yepamusoro-soro yenzvimbo yePasi lithospheric magnetic field. Iyo dataset inoshandisa nzira nyowani yekuenzanisira kusanganisa kuyerwa kwemhedzisiro kubva kuESA's Swarm satellite nenhoroondo yenhoroondo kubva kuGerman CHAMP setiraiti, iyo inobvumira masayendisiti kuburitsa magineti madiki masaini kubva kunze kwePasi. Tsvuku inomiririra nzvimbo iyo lithospheric magnetic field yakanaka uye yebhuruu inomiririra nzvimbo iyo lithospheric magnetic field haina kunaka.
Mutungamiriri weESA's Swarm mission, Rune Floberghagen akati mune chirevo: "Hazvisi nyore kunzwisisa hukuru hwenyeredzi yevabereki vedu. Hatigoni kungoishandisa kuyera chimiro chayo, maumbirwo ayo uye nhoroondo.. Kuyera kubva muchadenga kwakakosha zvikuru sezvo kuri tsananguro yemagineti chimiro chegoko rakaomarara repasi redu.
PaSwarm Sayenzi Musangano muCanada svondo rino, mepu nyowani yakaratidza shanduko dzakadzama mumunda nekunyatsojeka kupfuura zvakamboitika satellite-based reconstruction, zvakakonzerwa neiyo geological chimiro muPasi.
Imwe yeanomalies yakaitika muCentral African Republic, yakanangana neBangui, uko magineti akapinza zvakanyanya uye akasimba. Chikonzero chekusagadzikana uku hachisati chajeka, asi mamwe masayendisiti anofungidzira kuti zvingadaro kuve mhedzisiro yekukanganisa kwemeteorite makore anopfuura 540 miriyoni apfuura.
Iyo magnetic field iri mumamiriro ekugadzirisa zvachose. Magnetic north inochinja uye polarity inochinja ega ega mazana mashoma ezviuru zvemakore, saka kambasi inonongedza kumaodzanyemba pane kuchamhembe.
Magnetic pole
Kana kuputika kwegomo kuchiburitsa goko idzva, kunyanya pasi pegungwa, zvicherwa zvine iron-yakapfuma mumagma yakaomeswa zvinotarisana nemagineti kuchamhembe, zvichitora "mufananidzo" wemagnetic field inowanikwa panotonhora dombo.
Sezvo magineti matanda anofamba achidzoka nekufamba kwenguva, zvicherwa zvakaomeswa zvinoumba 'mipendero' pasi pegungwa uye zvinopa rekodhi yenhoroondo yemagineti yePasi. Mepu ichangoburwa yeSwarm inotipa tarisiro isati yamboitika yemarabhoni ane hukama neplate tectonics, ichiratidza kubva pamupata uri pakati pegungwa.
“Magineti aya mabhandi umboo hwekudzokera kumashure, uye kuongororwa kwemagineti pazasi pegungwa kunogona kugadzirazve shanduko dzakapfuura mupakati pesimba remagineti. Ivo zvakare vanobatsira kudzidza plate tectonics, "akadaro Dhananjay Ravat weYunivhesiti yeKentucky.
Mepu itsva inotsanangura maitiro emagnetic field anosvika makiromita 250 kureba uye achabatsira kuongorora geology uye tembiricha yePasi lithosphere.
Magmatic matombo anokosha zvakare kubva pakuona kwemagnetic rocks. Uye ndezvekuti zvakakosha kufungisisa kuti mukati menyika kune huwandu hwakawanda hwesimbi.
Ndinovimba kuti neruzivo urwu unogona kudzidza zvakawanda nezvemagineti matombo, kukosha kwavo uye nepasi remagineti pole.