地质力学学报2016，Vol.22Issue(4)：994-1003,10.
苏北盆地TZK9孔磁性地层及重矿物组合特征研究
MAGNETOSTRATIGRAPHY AND HEAVY MINERALS RECORDS OF TZK9 CORE IN SUBEI BASIN
摘要
Abstract
The core TZK9 is located in the northeast Taizhou city (N 32°35′,E120°6′),the south of Subei Basin.The main kinds of lithology in the core are clay and silty clay.Some silt,sand and coarse sand are also found.In this study,382 samples at 30 ～ 60 cm intervals were taken for paleomagnetic measurements,and 17 samples for heavy minerals test.Magnetostratigraphic results show that,the M/G and B/M are found at the depth of 250.3 and 78.5 m,respectively.Extrapolation with accumulation rates suggest that the basal ages for sediments in this core is about 3.0 Ma.ATi index was from 50.97 to 100,while GZI index was 11.48 to 77.81,indicating that the source was metamorphic and igneous rocks.During 3.0 ～ 2.6 Ma,the main heavy minerals of TZK9 core were ilmenite,epidote,magnetite,garnet and zircon.Comparing the heavy minerals of the TZK9 core with Huai river and Yangtze river,it shows that the sediment came from the Huai river during this time.During 2.6 ～ 0 Ma,the main heavy minerals are ilmenite,epidote,zircon,apatite,garnet and magnetite.The content of zircon,apatite,tourmaline,rutile increases compared to the previous period,and it indicates that the Yangtze river begin to influence this area in this period.And the ZTR index gradually increased since 2.6 Ma,which may be related to the change of global climate.关键词
晚上新世/磁性地层/重矿物/苏北盆地Key words
Late Pliocene/magnetic stratigraphy/heavy minerals/the Subei Basin分类
天文与地球科学引用本文复制引用
程瑜,李向前,赵增玉,张祥云,郭刚..苏北盆地TZK9孔磁性地层及重矿物组合特征研究[J].地质力学学报,2016,22(4):994-1003,10.基金项目
中国地质调查局地质调查项目“特殊地质地貌区填图试点”(DD20160060)、“江苏1:5万港口、泰县、张甸公社、泰兴县、生祠堂镇幅平原区填图试点”(12120114042901) （DD20160060）
