\u00c7inli bir ara\u015ft\u0131rma ekibi, Ay\u2019\u0131n uzak y\u00fcz\u00fcndeki G\u00fcney Kutbu\u2013Aitken (SPA) Havzas\u0131\u2019n\u0131 olu\u015fturan dev \u00e7arpman\u0131n Ay mantosundaki u\u00e7ucu maddelerin \u00f6nemli \u00f6l\u00e7\u00fcde kayb\u0131na yol a\u00e7t\u0131\u011f\u0131n\u0131 ortaya koydu. Bu bulgu, b\u00fcy\u00fck \u00f6l\u00e7ekli \u00e7arp\u0131\u015fmalar\u0131n Ay\u2019\u0131n jeolojik evrimi \u00fczerindeki rol\u00fcn\u00fc ve Ay\u2019\u0131n yak\u0131n y\u00fcz\u00fc ile uzak y\u00fcz\u00fc aras\u0131ndaki temel farkl\u0131l\u0131klar\u0131n k\u00f6kenini anlamak a\u00e7\u0131s\u0131ndan kritik bir kan\u0131t sunuyor.<\/p>\n
Ara\u015ft\u0131rma bulgular\u0131 d\u00fcn ABD Ulusal Bilimler Akademisi\u2019nin dergisi Proceedings of the National Academy of Sciences\u2019ta yay\u0131mland\u0131.<\/p>\n
Ay\u2019\u0131n olu\u015fumundan bu yana asteroit \u00e7arpmalar\u0131, y\u00fczeyde kraterler ve havzalar olu\u015fturarak topografya ile jeokimyasal yap\u0131y\u0131 \u015fekillendiren ba\u015fl\u0131ca d\u0131\u015f etkenler oldu. Buna kar\u015f\u0131n, b\u00fcy\u00fck \u00f6l\u00e7ekli \u00e7arpma olaylar\u0131n\u0131n Ay\u2019\u0131n derin i\u00e7 yap\u0131s\u0131n\u0131 ne \u00f6l\u00e7\u00fcde etkiledi\u011fi bug\u00fcne kadar netlik kazanmam\u0131\u015ft\u0131.<\/p>\n
\u00c7in Bilimler Akademisi Jeoloji ve Jeofizik Enstit\u00fcs\u00fc\u2019nden Tian Hengci\u2019nin liderli\u011findeki ekip, SPA Havzas\u0131\u2019ndan toplanan Chang\u2019e-6 g\u00f6revine ait Ay bazaltlar\u0131ndaki potasyum (K) izotop bile\u015fimlerini analiz etti.<\/p>\n
Potasyum gibi orta derecede u\u00e7ucu elementlerin izotoplar\u0131, \u00e7arpma s\u0131ras\u0131nda ortaya \u00e7\u0131kan a\u015f\u0131r\u0131 s\u0131cakl\u0131k ve bas\u0131n\u00e7 ko\u015fullar\u0131nda kolayca buharla\u015fmaya ve izotopik ayr\u0131\u015fmaya u\u011fruyor. Bu \u00f6zellikleri sayesinde s\u00f6z konusu izotoplar, \u00e7arpma an\u0131ndaki termal ko\u015fullar, bas\u0131n\u00e7 rejimleri ve malzeme kaynaklar\u0131 hakk\u0131nda \u00f6nemli bilgiler ta\u015f\u0131yor; dolay\u0131s\u0131yla \u00e7arp\u0131\u015fmalar\u0131n \u00f6l\u00e7e\u011fini, termal ge\u00e7mi\u015fi ve kabuk ile manto \u00fczerindeki etkilerini ortaya koyan g\u00fc\u00e7l\u00fc jeokimyasal g\u00f6stergeler olarak de\u011ferlendiriliyor.<\/p>\n
Ara\u015ft\u0131rma ekibi, Chang\u2019e-6 \u00f6rneklerinin, Apollo g\u00f6revleri ve Ay meteoritlerinden elde edilen t\u00fcm \u00f6nceki Ay bazaltlar\u0131na k\u0131yasla belirgin bi\u00e7imde daha a\u011f\u0131r potasyum izotop bile\u015fimleri sergiledi\u011fini tespit etti. Ard\u0131ndan kozmik \u0131\u015f\u0131nlara uzun s\u00fcreli maruz kalma, magmatik farkl\u0131la\u015fma ve \u00e7arpan kaynakl\u0131 katk\u0131lar gibi izotop bile\u015fimini etkileyebilecek olas\u0131 mekanizmalar ayr\u0131nt\u0131l\u0131 bi\u00e7imde incelendi. Ancak bu fakt\u00f6rlerin g\u00f6zlenen fark\u0131 a\u00e7\u0131klamakta yaln\u0131zca s\u0131n\u0131rl\u0131 bir rol oynad\u0131\u011f\u0131 g\u00f6r\u00fcld\u00fc.<\/p>\n
Daha ileri analizler, izotopik de\u011fi\u015fimin temel nedeninin dev \u00e7arpma s\u0131ras\u0131nda Ay mantosunda ya\u015fanan u\u00e7ucu madde kayb\u0131 oldu\u011funu ortaya koydu. \u00c7arpman\u0131n yaratt\u0131\u011f\u0131 a\u015f\u0131r\u0131 s\u0131cakl\u0131k ve bas\u0131n\u00e7 ko\u015fullar\u0131nda, daha hafif potasyum izotoplar\u0131n\u0131n tercihli olarak ka\u00e7t\u0131\u011f\u0131, geride kalan malzemenin ise daha a\u011f\u0131r izotoplar bak\u0131m\u0131ndan zenginle\u015fti\u011fi belirlendi.<\/p>\n
\u00c7al\u0131\u015fma ayr\u0131ca bu \u00f6l\u00e7ekte bir u\u00e7ucu madde t\u00fckenmesinin Ay\u2019\u0131n uzak y\u00fcz\u00fcnde magma olu\u015fumunu ve volkanik etkinli\u011fi zay\u0131flatm\u0131\u015f olabilece\u011fine i\u015faret ediyor. Bu s\u00fcre\u00e7, Ay\u2019\u0131n yak\u0131n y\u00fcz\u00fc ile uzak y\u00fcz\u00fc aras\u0131ndaki uzun s\u00fcredir bilinen volkanik asimetriye katk\u0131da bulunan temel etkenlerden biri olabilir.<\/p>\n
<\/strong> \u00c7inli bir ara\u015ft\u0131rma ekibi, Ay\u2019\u0131n uzak y\u00fcz\u00fcndeki G\u00fcney Kutbu\u2013Aitken (SPA) Havzas\u0131\u2019n\u0131 olu\u015fturan dev \u00e7arpman\u0131n Ay mantosundaki u\u00e7ucu maddelerin \u00f6nemli \u00f6l\u00e7\u00fcde kayb\u0131na yol a\u00e7t\u0131\u011f\u0131n\u0131 ortaya koydu.<\/p>\n","protected":false},"author":1,"featured_media":32904,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"googlesitekit_rrm_CAow07ekDA:productID":"","footnotes":""},"categories":[4],"tags":[],"class_list":["post-32903","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-dunya"],"_links":{"self":[{"href":"https:\/\/ekonomigundemi.com.tr\/index.php\/wp-json\/wp\/v2\/posts\/32903","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ekonomigundemi.com.tr\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ekonomigundemi.com.tr\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ekonomigundemi.com.tr\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ekonomigundemi.com.tr\/index.php\/wp-json\/wp\/v2\/comments?post=32903"}],"version-history":[{"count":0,"href":"https:\/\/ekonomigundemi.com.tr\/index.php\/wp-json\/wp\/v2\/posts\/32903\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ekonomigundemi.com.tr\/index.php\/wp-json\/wp\/v2\/media\/32904"}],"wp:attachment":[{"href":"https:\/\/ekonomigundemi.com.tr\/index.php\/wp-json\/wp\/v2\/media?parent=32903"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ekonomigundemi.com.tr\/index.php\/wp-json\/wp\/v2\/categories?post=32903"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ekonomigundemi.com.tr\/index.php\/wp-json\/wp\/v2\/tags?post=32903"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\nEKONOM\u0130 GAZETES\u0130 <\/p>\n","protected":false},"excerpt":{"rendered":"