{"id":8083,"date":"2021-03-05T08:30:42","date_gmt":"2021-03-05T08:30:42","guid":{"rendered":"http:\/\/iker.atomki.hu\/2021\/03\/05\/karbonatok-cseppkovek-kormeghatarozasa-u-th-modszerrel\/"},"modified":"2021-03-05T14:19:36","modified_gmt":"2021-03-05T14:19:36","slug":"u-th-dating-of-carbonates-speleothems-at-icer","status":"publish","type":"post","link":"https:\/\/iker.atomki.hu\/en\/2021\/03\/05\/u-th-dating-of-carbonates-speleothems-at-icer\/","title":{"rendered":"U-Th Dating of carbonates (speleothems) at ICER"},"content":{"rendered":"

[vc_row][vc_column][vc_custom_heading source=”post_title” font_container=”tag:h3|text_align:left” use_theme_fonts=”yes”][vc_text_separator title=”EVENTS” title_align=”separator_align_left” color=”custom” style=”dotted” border_width=”2″ css_animation=”right-to-left” accent_color=”#5eb3d2″][\/vc_column][\/vc_row][vc_row][vc_column][vc_column_text]We are pleased to announce that the first\u00a0234U\/230Th\u00a0dating of stalagmites from caves located at the northwestern Amazon Basin in Ecuador and Northern Hungary were successfully accomplished in our laboratory expanding our capabilities for studying past climates employing\u00a0terrestrial\u00a0archives.<\/strong><\/span>[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column][vc_column_text]Preliminary U concentrations were determined in our speleothems allowing us to constraint the amount required for subsequent dating. Samples were drilled along the central axis and underwent a chemical preparation consisting in a complete dissolution of the drilled material, spiking with our triple spike solution with known U-233, U-236 and Th-229 content, and a final separation of\u00a0U\u00a0and\u00a0Th on specific ion exchange resin. <\/span>[\/vc_column_text][vc_column_text]Finally, the prepared samples were measured in our recently installed Neptune Plus Multicollector Inductively Coupled Plasma ion source Mass Spectrometer (MC-ICP-MS) and results calibrated for a final corrected age. <\/span>[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column width=”1\/6″][\/vc_column][vc_column width=”2\/3″][vc_single_image image=”8069″ img_size=”full”][vc_column_text css=”.vc_custom_1614953791972{margin-top: -5em !important;}”]<\/p>\n

Separation using a specific U-Th ion-exchange resin<\/span><\/p>\n

[\/vc_column_text][\/vc_column][vc_column width=”1\/6″][\/vc_column][\/vc_row][vc_row][vc_column width=”1\/6″][\/vc_column][vc_column width=”2\/3″][vc_single_image image=”8076″ img_size=”full”][vc_column_text css=”.vc_custom_1614953803604{margin-top: -5em !important;}”]<\/p>\n

Evaporation of the collected U and Th fractions<\/span><\/p>\n

[\/vc_column_text][\/vc_column][vc_column width=”1\/6″][\/vc_column][\/vc_row][vc_row][vc_column][vc_single_image image=”8078″ img_size=”full”][vc_column_text css=”.vc_custom_1614953817106{margin-top: -5em !important;}”]<\/p>\n

Stalagmite from Ecuadorian Western Amazon<\/span><\/p>\n

[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column width=”1\/6″][\/vc_column][vc_column width=”2\/3″][vc_single_image image=”8081″ img_size=”full”][vc_column_text css=”.vc_custom_1614953828110{margin-top: -5em !important;}”]<\/p>\n

Age-Depth model for Ecuadorian stalagmite<\/span><\/p>\n

[\/vc_column_text][\/vc_column][vc_column width=”1\/6″][\/vc_column][\/vc_row][vc_row][vc_column][vc_column_text]<\/p>\n

These first results will equip our group to examine more closely the past wet events in the western Amazon Basin during the mid-Holocene and Last Interglacial in Central Europe. <\/span><\/p>\n

[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column][vc_btn title=”Back to the EVENTS main page” style=”outline-custom” outline_custom_color=”#000000″ outline_custom_hover_background=”#5eb3d2″ outline_custom_hover_text=”#ffffff” shape=”round” size=”sm” i_icon_fontawesome=”fas fa-arrow-left” add_icon=”true” link=”url:http%3A%2F%2Fiker.atomki.hu%2Fen%2Fevents%2F|title:Foly%C3%B3irat%20publik%C3%A1ci%C3%B3″][\/vc_column][\/vc_row]<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"

[vc_row][vc_column][vc_custom_heading source=”post_title” font_container=”tag:h3|text_align:left” use_theme_fonts=”yes”][vc_text_separator title=”EVENTS” title_align=”separator_align_left” color=”custom” style=”dotted” border_width=”2″ css_animation=”right-to-left” accent_color=”#5eb3d2″][\/vc_column][\/vc_row][vc_row][vc_column][vc_column_text]We are pleased to announce that the first\u00a0234U\/230Th\u00a0dating of stalagmites from caves located at the northwestern [\u2026]<\/span><\/p>\n","protected":false},"author":3,"featured_media":8072,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"jetpack_post_was_ever_published":false,"footnotes":""},"categories":[26,17],"tags":[],"class_list":["post-8083","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-interview","category-kutatas-en"],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/iker.atomki.hu\/wp-content\/uploads\/sites\/2\/2021\/03\/u-th-01-1.jpg?fit=1024%2C768&ssl=1","jetpack_shortlink":"https:\/\/wp.me\/paF6JY-26n","_links":{"self":[{"href":"https:\/\/iker.atomki.hu\/en\/wp-json\/wp\/v2\/posts\/8083","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/iker.atomki.hu\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/iker.atomki.hu\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/iker.atomki.hu\/en\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/iker.atomki.hu\/en\/wp-json\/wp\/v2\/comments?post=8083"}],"version-history":[{"count":7,"href":"https:\/\/iker.atomki.hu\/en\/wp-json\/wp\/v2\/posts\/8083\/revisions"}],"predecessor-version":[{"id":8091,"href":"https:\/\/iker.atomki.hu\/en\/wp-json\/wp\/v2\/posts\/8083\/revisions\/8091"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/iker.atomki.hu\/en\/wp-json\/wp\/v2\/media\/8072"}],"wp:attachment":[{"href":"https:\/\/iker.atomki.hu\/en\/wp-json\/wp\/v2\/media?parent=8083"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/iker.atomki.hu\/en\/wp-json\/wp\/v2\/categories?post=8083"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/iker.atomki.hu\/en\/wp-json\/wp\/v2\/tags?post=8083"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}