南海北部陆丰凹陷LF14-4-1D井中新世浮游有孔虫生物地层研究  

RESEARCH ON THE MIOCENE PLANKTONIC FORAMINFERAL BIOCHRONOSTRAITIGRAPHY AT WELL LF14-4-1D IN THE LUFENG SAG,NORTHERN SOUTH CHINA SEA

作　　者：薛力园 丁旋[1] 万晓樵[2] 

机构地区：[1]中国地质大学(北京)海洋学院,北京100083 [2]中国地质大学(北京)地球科学与资源学院,北京100083

出　　处：《微体古生物学报》2017年第3期320-331,共12页Acta Micropalaeontologica Sinica

基　　金：自然科学基金重点项目(91328201)资助~~

摘　　要：通过对前人在南海北部地区的中新世浮游有孔虫生物地层研究结果的对比,发现其中分带方案有一定的差异,而且分带依据和生物事件年龄也存在争议,特别是利用岩屑样品进行地层划分与对比的钻井尤为突出,对于后续研究和南海地区的地层对比都有较大的不利影响。基于此,我们对比了前人在南海北部中新世浮游有孔虫生物地层的研究成果,结合"2012国际地质年代表"和ODP184航次提供的经天文调谐的浮游有孔虫生物事件年龄,总结了研究区中新世以浮游有孔虫生物事件末现面为基础的13个地层分带,为南海北部地区浮游有孔虫生物地层的划分与对比,特别是生产单位利用岩屑样品进行研究的钻井地层划分,提供了可供对比的基础与依据。并依据上述分带方案,将南海北部陆丰凹陷LF14-4-1D井中新世地层详细划分出早中新世至上新世期间共9个有孔虫化石带或联合带,即早中新世M3带,早-中中新世M4-6联合带,中中新世M7带,M8带,M9带,M10带,M11带,晚中新世M12带和晚中新世-早上新世M13-PL1联合带。Several problems and debates were reviewed and discussed on the Miocene planktonic foraminiferal zonal schemes and ages in the northern South China Sea, which could lead to difficulty in further researches and strati- graphic correlation based on samples of drilled cuttings. Thirteen planktonic foraminiferal zones were discussed based on new dating from orbital tuning in the international standard chronostratigraphic timescale （2012） and ODP Leg 184. The present study provides the basis for planktonic foraminiferal biostratigraphy correlation in the northern South China Sea, especially in the application in the cutting samples for the stratigraphic subdivision. Additionally, this study also focuses on the biostratigraphy subdivision in the Miocece section at Well LF14, located in the Lufeng Sag of the Pearl River Mouth Basin, northern South China Sea, China. The marine sediments of the well contains a- bundant foraminiferal fossils during the Miocene. A total of 67 species in 16 genera were identified, and 9 zones and combine zones are recognized based on fourteen planktonic foraminiferal events and foraminiferal assemblages accord- ing to the updated standard in the GTS2012, including M3, M4-6, MT, M8, M9, M10, Mll, M12 and M13-PL1 during the Early Miocene to Early Pliocene.

关 键 词：浮游有孔虫 生物地层 化石带 中新世 陆丰凹陷 南海北部 

分 类 号：Q915[天文地球—古生物学与地层学]