中国地质
中國地質
중국지질
CHINESE GEOLOGY
2015年
1期
96-104
,共9页
张恒%李廷栋%高林志%耿树方%丁孝忠%刘燕学%吴昊
張恆%李廷棟%高林誌%耿樹方%丁孝忠%劉燕學%吳昊
장항%리정동%고림지%경수방%정효충%류연학%오호
江南造山带%翁家岭组%凝灰岩%SHRIMP锆石U-Pb定年
江南造山帶%翁傢嶺組%凝灰巖%SHRIMP鋯石U-Pb定年
강남조산대%옹가령조%응회암%SHRIMP고석U-Pb정년
Jiangnan orogenic belt%Wengjialing Formation%tuff%SHRIMP zircon U-Pb dating
提本文通过对赣东北广丰地区翁家岭组凝灰岩样品中的锆石进行研究,首次测得了翁家岭组凝灰岩SHRIMP锆石U-Pb年龄(841.2±5.1)Ma,约束了翁家岭组形成的时代,明确该套沉积岩为田里片岩之上、桃源组(上墅组)之下的一套地层。根据最新获得的大量高精度年龄数据,确定翁家岭组在层位上与梵净山群、四堡群、冷家溪群、双桥山群相当;覆于翁家岭组之上的桃源组是与侵入到梵净山群、四堡群、冷家溪群、双桥山群的火山侵入岩以及浦江地区“平水群”、江山市“章村组”同时期的火山侵入或喷出产物。江南造山带自西向东在830 Ma期间曾广泛发育一期岩浆活动事件。
提本文通過對贛東北廣豐地區翁傢嶺組凝灰巖樣品中的鋯石進行研究,首次測得瞭翁傢嶺組凝灰巖SHRIMP鋯石U-Pb年齡(841.2±5.1)Ma,約束瞭翁傢嶺組形成的時代,明確該套沉積巖為田裏片巖之上、桃源組(上墅組)之下的一套地層。根據最新穫得的大量高精度年齡數據,確定翁傢嶺組在層位上與梵淨山群、四堡群、冷傢溪群、雙橋山群相噹;覆于翁傢嶺組之上的桃源組是與侵入到梵淨山群、四堡群、冷傢溪群、雙橋山群的火山侵入巖以及浦江地區“平水群”、江山市“章村組”同時期的火山侵入或噴齣產物。江南造山帶自西嚮東在830 Ma期間曾廣汎髮育一期巖漿活動事件。
제본문통과대공동북엄봉지구옹가령조응회암양품중적고석진행연구,수차측득료옹가령조응회암SHRIMP고석U-Pb년령(841.2±5.1)Ma,약속료옹가령조형성적시대,명학해투침적암위전리편암지상、도원조(상서조)지하적일투지층。근거최신획득적대량고정도년령수거,학정옹가령조재층위상여범정산군、사보군、랭가계군、쌍교산군상당;복우옹가령조지상적도원조시여침입도범정산군、사보군、랭가계군、쌍교산군적화산침입암이급포강지구“평수군”、강산시“장촌조”동시기적화산침입혹분출산물。강남조산대자서향동재830 Ma기간증엄범발육일기암장활동사건。
Zircon dating of tuff bedding from the Wengjialing Formation in the east segment of the Jiangnan orogenic belt within northeast Jiangxi Province is reported for the first time in this paper (841.2 ± 5.1 Ma), which constrains the age of the Wengjialing Formation, suggesting that it lies above Tianli schist and beneath the Taoyuan Formation. In combination with a large number of high precision ages obtained for the Jiangnan orogenic belt recently, the authors hold that the Wengjialing Formation corresponds to the Fanjingshan Group, the Sibao Group, the Lengjiaxi Group, and the Shuangqiaoshan Group. The Taoyuan Group overlying the Wengjialing Formation was formed in the same period as the volcanic rocks which intruded into the Fanjingshan Group, the Sibao
<br> Group, the Lengjiaxi Group, and the Shuangqiaoshan Group, and also occurred simultaneously with the“Pingshui Group”in Pujiang City, Zhejiang Province, and the“Zhangcun Formation”in Jiangshan City, Zhejiang Province. At 830 Ma, a magma event was widely developed from west to east in the Jiangnan orogenic belt.