本文選題：瓊南縫合帶 + 瓊南海盆��； 參考：《海洋地質(zhì)與第四紀(jì)地質(zhì)》2016年04期

【摘要】：為了獲得南海北緣瓊南縫合帶南北兩側(cè)地塊的碰撞時(shí)間,對(duì)九所陵水東段采集的中高級(jí)變質(zhì)石榴石石英片巖和花崗質(zhì)片麻巖進(jìn)行了LA-ICP-MS鋯石U-Pb定年。實(shí)驗(yàn)結(jié)果發(fā)現(xiàn):原巖為沉積巖的石榴石石英片巖形成于晚泥盆紀(jì);3個(gè)鋯石變質(zhì)殼諧和/近諧和年齡表明碰撞事件發(fā)生在(233±4)Ma左右;花崗質(zhì)片麻巖原巖為同構(gòu)造侵位的花崗巖,其8個(gè)鋯石增生年齡顯示的是深熔作用的時(shí)間,為(206±3)Ma。這些研究成果對(duì)重建南海北緣瓊南縫合帶在研究區(qū)內(nèi)的演變歷史具有重要意義。
[Abstract]:In order to obtain the collision time of the northern and southern Qiongnan suture belt of the South China Sea, LA-ICP-MS zircon U-Pb dating was carried out for the middle and high grade metamorphic garnet quartz schist and granitic gneiss collected in the eastern segment of Jiushengshui.The experimental results show that garnet quartz schist with sedimentary rocks was formed in the late Devonian, three zircon metamorphic crust harmonic / near harmonic ages indicated that the collision event occurred around #number0# 鹵4)Ma, and the granitic gneiss was a syntectonic emplacement granite.The age of 8 zircon accretion shows the time of deep melting, which is 206 鹵3 Ma.These results are of great significance for reconstructing the evolutionary history of the Qiongnan suture zone in the northern margin of the South China Sea.
【作者單位】： 中國(guó)科學(xué)院南海海洋研究所邊緣海與大洋地質(zhì)重點(diǎn)實(shí)驗(yàn)室;中國(guó)科學(xué)院大學(xué);
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(41276048;91328205;41476039;41206035) “中國(guó)海及鄰域地質(zhì)地球物理及地球化學(xué)系列圖”項(xiàng)目(GZH200900504-WX02)
【分類(lèi)號(hào)】：P597.3;P736.1

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1 劉海齡;閻貧;劉迎春;鄧輝;;南海北緣瓊南縫合帶的存在[J];科學(xué)通報(bào);2006年S3期

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