一分pk拾

我科学家研究发现青藏高原碰撞诱发太平洋板块俯冲
发布日期: 2021-09-18    信息来源:一分pk拾     作者: 科技日报字号: [ ]

9yue18ri,jizhecongzhongguokexueyuanhaiyangyanjiusuohuoxi,gaiyanjiusuosunweidongyanjiuyuanketizufaxianyuewuqiansanbaiwannianqian,yindubankuaiheaodaliyabankuaijihutongshiyuouyabankuaifashengyingpengzhuang,zaixingchengqingzanggaoyuandetongshi,yinfataipingyangbankuaixiangxibeifuchong。yanjiujieguojinrizaixianfabiaozaiquanweixueshuqikanscience bulletin(《kexuetongbao》)shang。

bankuaigouzaolilunshigutidiqiukexuedejishi,yuliangzilixue、xiangduilun、fenzishengwuxueyiqi,beiyuweiershishijizirankexuesidadianjixinglilun。bankuaigouzaotizhiqishideguanjianshibankuaifuchongqishi。danshi,qijinweizhi,bankuaifuchongshiruheqishideyizhicunzaizhengyi,shiguojidixuejieyanjiuredian。guoqujinian,guojidayangfaxianjihua(iodp)tourushuqianwanmeiyuan,xianhoukaizhanle4gezuantanhangci,hangcileijihaoshichaoguo8geyue,xitongyanjiuxitaipingyangxinshengdaibankuaifuchongqishijizhi。muqiandedaodejielunshi,yidou-xiaoliyuan-maliyanafuchongqishishuyuzifafuchongqishi,jiyouyuyangqiaonianlingdechayidaozhimidudechayi,jinershigulaodeyangqiaofuchongdaonianqingdeyangqiaozhixia(arculus et al., 2015; maunder et al., 2020)。zaifuchongbankuaidetuoyexia,taipingyangbankuaidepiaoyifangxiangfashenglegaibian,xingchenglezhumingdexiaweiyi-diwangdaoliandaguaiwan。

sunweidongketizugenjuqianqitichude“yanjiangyinqing”jiashuo(sunweidong, 2019),renweiyouyubankuaimiduchayinqidezifafuchongyinggaishixianxiaofanweikaishifuchong,zaizhujianxiangliangcekuozhan。yinci,fuchongdaibutongbuweifuchongqishishijiancunzaimingxiandechayi。danshi,xinshengdaixitaipingyangbankuainianlingchayihenda,yubutongshidaiyangqiaoxiangguandeyidouxiaoliyuan-maliyanahaigou、aliushenhaigouhetangjia-kemadikehaigoudefuchongqidongshijianquejibenxiangtong(tu1)。zheijiubiaomingtamenbushiyouyuyangqiaonianlingchayiyinqidezifafuchong,ershiyoutaipingyangbankuaidezhongdabianhuasuochufade。

一分pk拾shishenmedizhishijiandaozhiletaipingyangbankuaifashengrucijudadezhuanbianni?

weilejiejuezheigewenti,ketizuduiyindubankuai、aodaliyabankuaihetaipingyangbankuaideyundongsulvjinxinglezhongjian,jieguofaxianzaitaipingyangbankuaifashengzhuanxiangzhiqian,yindubankuaiheaodaliyabankuaijunzaitaipingyangbankuaixiangxifuchongqishiqianfashenglemingxiandejiansu,biaomingxinshengdaixitaipingyangbankuaifuchongshiyoudaofuchong。

一分pk拾jujinyue1yi-5300wannian,yindubankuai、aodaliyabankuaihetaipingyangbankuaijunxiangbeipiaoyi。cishitaipingyangbankuaixiangbeifuchong,yuaodaliyabankuaizhijian,ouduansilian,gouzaoguanxileisixianjindeyindubankuaiyuaodaliyabankuai。houzheyiyinduyangdedongjingjiushiduhailingjuxingzouhuadaixianglian。

zaiyue5300wannianqian,yindubankuai、aodaliyabankuaijunyuouyabankuaifashengleyingpengzhuang,piaoyisulvdafudujiangdi(tu2)。cishi,taipingyangbankuaixiangbeidepiaoyiweishoudaozudang,xingchengleyigejudadeganggan,daozhiletaipingyangbankuaiyundongfangxiangdegaibian,daozhixindefuchong。

zheiyifaxianzhichizuozhetichude“yanjiangyinqing”jiashuo,laodeyangpenpengzhuangbihedaozhilinjuyangpenxindebankuaifuchong,zhengshibankuaigouzaotizhideyichixushushiyiniandeguanjian。zheizhongbankuaifuchongqishijizhiweiwanshanbankuaigouzaoliluntigonglezhongyaodezhiyue。

一分pk拾yindudaluzai~liuqianwannianshisulvdadaozuidazhi,zai~5500-5200wannianxunsujiangdi;aodaliyadaluyundongsulvzai~5300-5000wannianyexunsujiangdi,zai~5000wannianshisulvjiejin0;liangdabankuaiyundongsulvdouxunsujiangdideshijianbiaomingyingpengzhuangdekaishi,zheikenengshidaozhitaipingyangbankuaiyundongfangxianggaibiandezhuyaoqudongli。




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