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Magmatichnij okean Misyacya ce shar rozplavlenoyi porodi yakij za teoriyeyu buv prisutnij na poverhni Misyacya Magmatichnij okean Misyacya jmovirno buv prisutnij na Misyaci z momentu formuvannya Misyacya priblizno 4 5 abo 4 4 milyarda rokiv tomu 1 do desyatkiv abo soten miljoniv rokiv pislya cogo chasu Ce termodinamichnij naslidok vidnosno shvidkogo formuvannya Misyacya pislya gigantskogo udaru mizh protozemleyu ta inshim planetarnim tilom U miru togo yak Misyac ob yednavsya z ulamkiv vid gigantskogo udaru gravitacijna potencijna energiya peretvorilasya na teplovu Cherez shvidku akreciyu Misyacya priblizno vid misyacya do roku 2 3 4 teplova energiya bula zahoplena oskilki ne bulo dostatnogo chasu dlya teplovogo viprominyuvannya energiyi cherez misyachnu poverhnyu Podalsha termohimichna evolyuciya okeanu misyachnoyi magmi poyasnyuye perevazhno anortozitovu koru Misyacya yevropiyevu anomaliyu en ta material KREEP Animaciya yaka pokazuye poperechnij pereriz okeanu misyachnoyi magmi koli vona kristalizuyetsya z chasom Pershi tverdi rechovini sho utvoryuyutsya napriklad olivin ye shilnishimi za navkolishnyu magmu tomu opuskayutsya vseredinu Pislya togo yak priblizno 80 magmatichnogo okeanu Misyacya kristalizuyetsya mensh shilni tverdi rechovini tobto plagioklaz pochinayut utvoryuvatisya ta splivati do poverhni utvoryuyuchi pervisnu koru Misyacya Teoriya magmatichnogo okeanu Misyacya spochatku bula zaproponovana dvoma grupami v 1970 roci pislya analizu ulamkiv anortozitnih porid znajdenih u kolekciyi zrazkiv Apollona 11 5 6 Vud ta in vikoristovuvali fragmenti masovoyi probi 10085 dlya svoyih analiziv 7 Zalizisti anortozitovi porodi znajdeni pid chas programi Apollon skladayutsya v osnovnomu ponad 90 z mineralu plagioklazu 8 Bilsh konkretno zalizisti anortozitovi porodi znajdeni na Misyaci skladayutsya z kalciyevogo Ca kincevogo chlena plagioklazu tobto anortitu 9 Ce svidchit pro te sho prinajmni verhni shari Misyacya buli rozplavleni v minulomu cherez chistotu misyachnih anortozitiv i toj fakt sho anortit zazvichaj maye visoku temperaturu kristalizaciyi 10 Misyachna zalizista anortozitova poroda z Apollona 16 zrazok 60025 Zmist 1 Pochatkovij stan 1 1 Pochatkovij himichnij sklad i glibina 2 Poslidovnist kristalizaciyi 3 Trivalist 4 Sprostovni dokazi 5 PrimitkiPochatkovij stan red nbsp Sim opublikovanih ocinok AG pochatkovogo himichnogo skladu magmatichnogo okeanu Misyacya pokazanih u vagovih vidsotkah Drugoryadni komponenti taki yak TiO 2 i Cr2O3 ne pokazani A Povnij misyac Tejlora TWM vid Tejlora 1982 11 zi zminami v Elardo ta in 2011 12 B O Neill 1991 13 zi zminami v Schwinger and Breuer 2018 14 C Misyachna primitivna verhnya mantiya LPUM vid Longhi 2006 15 zi zminami v Elardo et al 2011 12 D Elkins Tanton ta in 2011 16 E Morgan ta in 1978 17 F Ringvud i Kesson 1976 18 G Uorren 1986 19 Pri rozglyadi pochatkovogo stanu okeanu magmi Misyacya ye tri vazhlivi parametri himichnij sklad glibina ta temperatura Ci tri parametri znachnoyu miroyu viznachayut termohimichnu evolyuciyu Dlya okeanu magmi Misyacya isnuye neviznachenist pov yazana z kozhnoyu iz cih pochatkovih umov Tipovij pochatkovij himichnij sklad stanovit 47 1 SiO2 33 1 MgO 12 0 FeO 4 0 Al2O3 i 3 0 CaO z neznachnim vmistom inshih molekul a takozh pochatkova glibina 1000 km i bazalna temperatura 1900 K 16 Pochatkovij himichnij sklad i glibina red Pochatkovij himichnij sklad okeanu magmi Misyacya ocinyuyetsya na osnovi himiyi misyachnih zrazkiv a takozh himichnogo skladu ta tovshini potochnoyi misyachnoyi kori Dlya cilej komp yuternogo modelyuvannya pochatkovij himichnij sklad zazvichaj viznachayetsya masovimi vidsotkami na osnovi sistemi osnovnih molekul takih yak SiO2 MgO FeO Al2O3 i CaO Sim prikladiv pochatkovogo himichnogo skladu okeanu misyachnoyi magmi z literaturi pokazani na malyunku pravoruch Ci kompoziciyi zagalom podibni do skladu mantiyi Zemli z osnovnoyu vidminnistyu v tomu sho deyaki napriklad povnij misyac Tejlora 11 abo ne mistyat napriklad pervisna verhnya mantiya Misyacya 15 vognetrivkih en elementiv Peredbachuvana pochatkova glibina okeanu magmi Misyacya kolivayetsya vid 100 km do radiusa Misyacya 20 16 21 22 Poslidovnist kristalizaciyi red Tochna poslidovnist mineraliv yaki kristalizuyutsya z okeanu magmi Misyacya zalezhit vid pochatkovogo stanu okeanu magmi Misyacya a same himichnogo skladu glibini ta temperaturi Vidpovidno do idealizovanoyi seriyi reakcij Bouena ochikuyetsya sho spochatku kristalizuyetsya olivin a potim ortopiroksen Ci minerali shilnishi za navkolishnyu magmu i tomu opuskayutsya na dno okeanu misyachnoyi magmi Takim chinom spochatku ochikuyetsya sho okean misyachnoyi magmi zatverdiye znizu vgoru Pislya kristalizaciyi priblizno 80 okeanu misyachnoyi magmi mineral plagioklaz kristalizuyetsya razom z inshimi mineralami Skeli yaki v osnovnomu skladayutsya z plagioklazu tobto anortozitu utvoryuyutsya ta plavayut do poverhni Misyacya utvoryuyuchi pervisnu koru Misyacya 18 Trivalist red Okean magmi Misyacya mig isnuvati vid desyatkiv do soten miljoniv rokiv pislya utvorennya Misyacya Za ocinkami Misyac utvorivsya mizh 52 i 152 miljonami rokiv pislya bagatih kalciyem i alyuminiyem vklyuchen najdavnishih vidomih tverdih til u Sonyachnij sistemi yaki sluzhat promizhnoyu lankoyu dlya jogo viku 4 567 mlrd rokiv tomu 1 Tochnij chas utvorennya misyachnogo okeanu magmi desho neviznachenij Kincevi tochki mozhut buti vkazani vikom zrazka 60025 zalizistogo anortozitu 4 360 0 003 mlrd rokiv i rozrahunkovim vikom ur KREEP 4 368 0 029 mlrd rokiv 23 Yakbi Misyac utvorivsya rano tobto cherez 52 miljoni rokiv pislya utvorennya Sonyachnoyi sistemi i obidva zrazki vkazuvali b na povnu kristalizaciyu okeanu misyachnoyi magmi todi okean misyachnoyi magmi proisnuvav bi priblizno 155 miljoniv rokiv U comu vipadku komp yuterni modeli pokazuyut sho dlya prodovzhennya kristalizaciyi okeanu misyachnoyi magmi potribne odne abo kilka dzherel tepla napriklad prilivne nagrivannya 24 25 Yaksho Misyac utvorivsya pizno tobto cherez 152 miljoni rokiv pislya utvorennya Sonyachnoyi sistemi to znovu zh taki vikoristovuyuchi vik zrazka zalizistogo anortozitu 60025 i rozrahunkovij vik ur KREEP magmatichnij okean Misyacya isnuvav bi priblizno 55 miljoniv rokiv Ce oznachaye sho magmatichnij okean Misyacya ne buv podovzhenij odnim abo kilkoma dodatkovimi dzherelami tepla nbsp Najnadijnishij vik zrazka zalizistogo anortozitu FAN pokazanij chervonim kvadratom smugi pohibok menshi za marker a najkrasha ocinka formuvannya pochatkovogo sharu KREEP na glibini tobto ur KREEP pokazana temnim blakitnim trikutnikom 23 Najstarishij 26 i najmolodshij 27 zrazki zalizistogo anortozitu pokazani sirimi kolami U minulomu riznicyu u vici mizh najstarishimi ta najmolodshimi zrazkami zalizistogo anortozitu vikoristovuvali dlya viznachennya trivalosti magmatichnogo okeanu Misyacya Ce bulo problematichno cherez veliki pohibki viku vibirki ta cherez te sho deyaki viki vibirki buli skinuti udarami Napriklad najstarishim zrazkom zalizistogo anortozitu ye 67016 z vstanovlenim za Sm Nd en vikom 4 56 0 07 mlrd 26 a najmolodshim ye 62236 z vstanovlenim za Sm Nd vikom 4 29 0 06 mlrd 27 Riznicya mizh cimi vikami stanovit 270 miljoniv rokiv Ce znovu oznachalo b sho magmatichnij okean Misyacya mav dodatkove dzherelo tepla napriklad priplivne nagrivannya 24 Analiz cirkoniv u zrazkah Apollona 14 pokazuye sho misyachna kora diferenciyuvalasya 4 51 0 01 milyarda rokiv tomu sho vkazuye na formuvannya Misyacya cherez 50 miljoniv rokiv pislya pochatku Sonyachnoyi sistemi 28 Sprostovni dokazi red Odniyeyu z alternativnih modelej do modeli magmatichnogo okeanu Misyacya ye model serijnogo magmatizmu 29 30 Primitki red a b Touboul Mathieu Kleine Thorsten Bourdon Bernard Palme Herbert Wieler Rainer February 2009 Tungsten isotopes in ferroan anorthosites Implications for the age of the Moon and lifetime of its magma ocean Icarus 199 2 245 249 Bibcode 2009Icar 199 245T doi 10 1016 j icarus 2008 11 018 ISSN 0019 1035 Ida Shigeru Canup Robin M 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and the Planets 18 4 465 478 doi 10 1007 bf00897296 ISSN 0165 0807 a b Ringwood A E Kesson S E 1 kvitnya 1976 A dynamic model for mare basalt petrogenesis Lunar and Planetary Science Conference Proceedings 7 1697 1722 Bibcode 1976LPSC 7 1697R Warren Paul H 30 bereznya 1986 Anorthosite assimilation and the origin of the Mg Fe related bimodality of pristine moon rocks Support for the magmasphere hypothesis Journal of Geophysical Research Solid Earth 91 B4 331 343 Bibcode 1986JGR 91D 331W doi 10 1029 jb091ib04p0d331 ISSN 0148 0227 Andrews Hanna J C Asmar S W Head J W Kiefer W S Konopliv A S Lemoine F G Matsuyama I Mazarico E McGovern P J 5 grudnya 2012 Ancient Igneous Intrusions and Early Expansion of the Moon Revealed by GRAIL Gravity Gradiometry Science 339 6120 675 678 doi 10 1126 science 1231753 ISSN 0036 8075 PMID 23223393 Rapp J F Draper D S 16 kvitnya 2018 Fractional crystallization of the lunar magma ocean Updating the dominant paradigm Meteoritics amp Planetary Science 53 7 1432 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5 1168 1191 arXiv 1804 04772 Bibcode 2018JGRE 123 1168P doi 10 1029 2017je005512 ISSN 2169 9097 b cite journal b hdl access vimagaye hdl dovidka a b Alibert Chantal Norman Marc D McCulloch Malcolm T July 1994 An ancient Sm Nd age for a ferroan noritic anorthosite clast from lunar breccia 67016 Geochimica et Cosmochimica Acta 58 13 2921 2926 Bibcode 1994GeCoA 58 2921A doi 10 1016 0016 7037 94 90125 2 ISSN 0016 7037 a b Borg Lars Norman Marc Nyquist Larry Bogard Don Snyder Greg Taylor Larry Lindstrom Marilyn October 1999 Isotopic studies of ferroan anorthosite 62236 a young lunar crustal rock from a light rare earth element depleted source Geochimica et Cosmochimica Acta 63 17 2679 2691 Bibcode 1999GeCoA 63 2679B doi 10 1016 s0016 7037 99 00130 1 ISSN 0016 7037 Barboni et al Early formation of the Moon 4 51 billion years ago Science Advances Vol 3 Issue 1 January 2017 https doi org 10 1126 sciadv 1602365 Gross J Treiman A H Mercer C N M March 2012 Sinking the Lunar Magma Ocean New Evidence from Meteorites and the Return of Serial Magmatism Lunar and Planetary Science Conference 1659 2306 Bibcode 2012LPI 43 2306G Gross Juliane Treiman Allan H Mercer Celestine N February 2014 Lunar feldspathic meteorites Constraints on the geology of the lunar highlands and the origin of the lunar crust Earth and Planetary Science Letters 388 318 328 Bibcode 2014E amp PSL 388 318G doi 10 1016 j epsl 2013 12 006 ISSN 0012 821X Otrimano z https uk wikipedia org w index php title Magmatichnij okean Misyacya amp oldid 42358937