ngµç×ÓÓÎÏ·

05

¿ÆÑÐÏ£Íû

ngµç×ÓÓÎÏ·ÍŶÓÔÚÉϡÍÁ¶¨ÄêÊÖÒÕÓ븻¼¯Ê±¼ä¼ÍÂÉÑо¿È¡µÃÖ÷ҪϣÍû

¸å¼þȪԴ£ºº£Ñó¿ÆÑ§Ñ§Ôº ±à¼­£ºÌ¸Ï£¡£¡¢¡¢Íõ¶¬Ã· ÉóºË£ºËïÒ«±ó ÔĶÁÁ¿£º

ngµç×ÓÓÎÏ·ÐÂÎÅÍøÑ¶£¨Í¨Ñ¶Ô±ÀîµÇ·å£©É¸»Ï¡ÍÁ³Á»ýÎï±»ÒÔΪÊÇÒ»ÖÖDZÔÚµÄÏ¡ÍÁ¿ó²ú×ÊÔ´£¬£¬£¬Æä×ÜÏ¡ÍÁº¬Á¿¿É¸ß´ï8000 ppm£¬£¬£¬²¢ÇÒº¬¸»ºñµÄÖÐÖØÏ¡ÍÁ×ÊÔ´¡£¡£ÏÖÓÐÑо¿ÒÑ·¢Ã÷£¬£¬£¬Ï¡ÍÁÔªËØº¬Á¿ÓëÁ×ËáÑγÊÕýÏà¹Ø£¬£¬£¬À嶨Á˳Á»ýÎïÖÐ×îÖ÷ÒªµÄÏ¡ÍÁ¸³´æ¿óÎïÊÇÉúÎïÖÊÁ×»Òʯ£¨Í¼1£©¡£¡£È»¶ø£¬£¬£¬ÉϡÍÁ¸»¼¯µÄʱ¼ä¼ÍÂÉÑо¿»¹Ê®·Ö±¡Èõ£¬£¬£¬×è°­Á˳ɿóÀíÂÛ¿ªÕ¹ºÍºóÐøµÄ×ÊÔ´¿±Ì½¿ª·¢¡£¡£


F5BA8FE387D1BBCADB8247D10D9_B1C9E121_1E8C0

ͼ1 IODPÑÒоºÍÎ÷̫ƽÑó¸»Ï¡ÍÁ³Á»ýÎïÖеÄÓãÑÀÑùÆ·BSE ͼÏñ

(A) À´×Ô IODP Leg 199 Õ¾µã1218A-7H-1µÄÕû¿ÅÓãÑÀ£¬£¬£¬Éî¶È56.5 m£»£»£»(B) ÑÀÓÔÖʵÄÏËάÖʵØ£¬£¬£¬ÆäÖÐÓÐϸСÁÑÎÆ£»£»£»(C) ÑÀËè±»ÏûÈÚµÄÓãÑÀ£¬£¬£¬ÆäÑÀÓÔÖʲ¿·ÖÏà¶ÔÍêÕû£»£»£»(D) ÖпյÄÓãÑÀÖÐÌî³äÁË´ó×Ú΢»¯Ê¯£»£»£»(E & F) Cyclicargolithus Floridanus ºÍ Discoaster Calculosus΢ÉúÎﻯʯ£»£»£»(G) À´×ÔÎ÷Ì«¸»Ï¡ÍÁ³Á»ýÎïÖеÄÉúÑÄÍêºÃµÄÓãÑÀ£»£»£»(H) ÓãÑÀÏÔʾ³ö¸ù²¿ÆÆË鵫¼â¶ËÍêÕûµÄ½á¹¹£»£»£»(I) ×é³ÉÓãÑÀµÄ΢Ã×¼¶ôÇ»ùÁ×»Òʯ¾§Ìå


ÒÑÓÐÑо¿ÒÔΪ£¬£¬£¬ÓãÑÀÖÐÏ¡ÍÁ¸»¼¯±¬·¢ÔÚÓãÀàËÀºó100Äêµ½10ÍòÄê¼ä£¬£¬£¬²¢Åãͬ×ÅÈ¥ÓлúÖʵÄÀú³Ì£¨Kohn and Law, 2006£©¡£¡£ÉúÎïÁ×»ÒʯÖеÄÏ¡ÍÁº¬Á¿Ó뼸ǧÄêµ½4ÒÚÄêÏ¡ÍÁ¸»¼¯³Ì¶ÈÏ൱£¬£¬£¬Ò²´ÓÁíÒ»·½ÃæËµÃ÷ÎúÏ¡ÍÁÔںܶÌʱ¼äÄÚ½øÈëÆäÖУ¬£¬£¬²¢³¤Ê±¼ä¼á³ÖÎȹ̣¨Finlay et al., 2013£©¡£¡£Í¬Ê±£¬£¬£¬Ä£ÄâʵÑé֤ʵ£¬£¬£¬ÉúÎïÁ×»ÒʯÊÇÒ»ÖֱȷúÁ×»Òʯ¸üºÃµÄºËÎÛȾÎü¸½¼Á£¬£¬£¬½öÐè4ÍòÄê×óÓÒµÄʱ¼ä£¬£¬£¬UÔªËØ¾Í¿ÉÒÔ±»ÍêÈ«¸»¼¯£¨Trueman and Tuross, 2002£©¡£¡£Ô­Î»ÆÊÎöЧ¹ûÏÔʾ£¬£¬£¬ÓãÑÀÖÐÏ¡ÍÁÔªËØºÍU-PbÄêÔÂѧµÄUÔªËØº¬Á¿³ÊÕýÏà¹Ø£¬£¬£¬ËµÃ÷ÓãÑÀÖеÄÏ¡ÍÁÔªËØºÍUÔªËØÍ¬Ê±½øÈëÆäÖУ¨Í¼2£©¡£¡£Òò´Ë£¬£¬£¬ÉúÎïÁ×»ÒʯU-PbÄêÔÂѧÄܹ»´ú±íÏìÓ¦²ãλµÄÏ¡ÍÁ¸»¼¯Ê±´ú¡£¡£


67BF6BC4BC84E073682009004EE_24CE12E5_FDAD

ͼ2 ÉúÎïÁ×»Òʯ£¨ÓãÑÀ£©ÑÀÓÔÖʲ¿·Ö¼¤¹â΢Á¿ÔªËØÆÊÎöЧ¹ûÏÔʾ£¬£¬£¬UºÍREYº¬Á¿³ÊÕýÏà¹Ø¹ØÏµ


»ùÓÚÒÔÉÏÑо¿£¬£¬£¬ngµç×ÓÓÎÏ·º£Ñó¿ÆÑ§Ñ§Ôºº£ÑóµØÖÊÓëµØÇò»¯Ñ§Ñо¿ÍŶӿªÕ¹ÁËÉ³Á»ýÎïÖÐÉúÎïÁ×»ÒʯµÄU-PbÄêÔÂѧÑо¿ÊÂÇé¡£¡£Ñо¿ÍŶӻñÈ¡Á˾ßÓнϺÃÄêËê¿ò¼ÜµÄIODP×ê¿×ÑùÆ·£¬£¬£¬ÌôÑ¡ÆäÖеÄÓãÑÀ¿ªÕ¹ÁËÉúÎïÁ×»ÒʯU-PbÄêÔÂѧÑéÖ¤¡£¡£Ð§¹ûÅú×¢£¬£¬£¬IODP×ê¿×ÖÐÓãÑÀU-Pb¶¨ÄêЧ¹ûÓë΢Ìå¹ÅÉúÎïÄêÔÂÔÚÎó²î¹æÄ£ÄÚÒ»Ö£¬£¬£¬ËµÃ÷ÉúÎïÁ×»ÒʯU-PbÄêÔÂÅÌËãΪ¿É¿¿¡£¡£ÔÚ´Ë»ù´¡ÉÏ£¬£¬£¬Ñо¿ÍŶӽ«Á×»ÒʯU-PbÄêÔÂѧӦÓÃÓÚÎ÷̫ƽÑó¸»Ï¡ÍÁ³Á»ýÎïÑùÆ·ÖУ¬£¬£¬U-Pb¶¨ÄêЧ¹û´Óµ×²¿µ½¶¥²¿Îª6.22°ÙÍòÄêµ½2.16°ÙÍòÄ꣨ͼ3£©£¬£¬£¬Í¬Ê±¸ÃÄêÔÂѧ»¹»ñµÃÁËÓãÑÀԭλSrÍ¬Î»ËØÐ§¹ûµÄÑéÖ¤£¨Í¼4£©£¬£¬£¬ÓÐÓÃ֤ʵÎú¸ÃÇøÓòÄÚ±£´æÒ»ÆÚÖÐÐÂÊÀÏ¡ÍÁ¿ó»¯ÊÂÎñ¡£¡£¸ÃÒªÁìµÄÀÖ³ÉÔËÓý«ÓÐÖúÓÚ¸÷¸öº£ÓòµÄÏ¡ÍÁ¸»¼¯Ê±´úÑо¿£¬£¬£¬²¢Õ¹ÏÖ³Á»ýÎï²î±ðÉî¶ÈÏ¡ÍÁ¸»¼¯ÊÂÎñ¡£¡£


E0A0252A48382BE91E53B896295_B6246A24_1D8E6

ͼ3 Î÷̫ƽÑó¸»Ï¡ÍÁ³Á»ýÎïÖÐÓãÑÀµÄU-Pb WetherillгºÍͼ£¬£¬£¬Êý¾ÝÍÖÔ²ºÍÄêËêÎó²î¾ùΪ2¦Ò


F2D51753A01D401ACFD19225C14_653FFF01_587D

ͼ4 ÓãÑÀÑÀÓÔÖÊԭλSrÍ¬Î»ËØÐ§¹ûÓëÈ«Çòº£Ë®SrÍ¬Î»ËØ±ÈÕÕͼ


ÒÔÉÏÑо¿Ð§¹û½ÒÏþÓÚÆÚ¿¯Geology£¬£¬£¬ÎÊÌâΪ¡°Dating REE enrichment in deep-sea sediments using U-Pb geochronology of bioapatite¡±£¬£¬£¬ÂÛÎĵÚÒ»×÷Õß¼°Í¨Ñ¶×÷ÕßΪngµç×ÓÓÎÏ·º£Ñó¿ÆÑ§Ñ§ÔºÀîµÇ·å¸±½ÌÊÚ¡£¡£

¸ÃÑо¿»ñµÃÁ˹ú¼Ò×ÔÈ»¿ÆÑ§»ù½ð£¨NSFC£©×ÊÖú£¬£¬£¬²¢ÉêÇëʹÓÃÁ˹ãÖݺ£ÑóµØÖÊÊÓ²ì¾ÖºÍ¹ú¼Ê´óÑó·¢Ã÷ÍýÏë £¨IODP£© ÌṩµÄÑùÆ·¡£¡£ÉúÎïÁ×»ÒʯU-PbÄêÔÂѧÔÚngµç×ÓÓÎÏ·º£Ñó¿ÆÑ§Ñ§Ôºº£Ñó³Á»ýÎïµØÇò»¯Ñ§ÊµÑéÊÒ²âÊÔÍê³É¡£¡£

ÂÛÎÄÁ´½Ó£ºhttps://doi.org/10.1130/G50938.1

¡¾ÍøÕ¾µØÍ¼¡¿