地质通报2016，Vol.35Issue(10)：1669-1678,10.
莱州湾南岸HLL01孔磁性地层定年
Magnetostratigraphic chronology of Borehole HLL01, south coast of Laizhou Bay
摘要
Abstract
Asian marginal seas have played an important role in modulating regional energy and material exchanges and deriving cli⁃matic and environmental evolutions. As an effective method, magnetostratigraphy establishes reliable geochronological framework, which is critical for reconstructing long-term history of climatic and environmental changes in the past. Due to the fact that the previ⁃ous long-term records were mainly located in the west and north Bohai Sea, a new Borehole HLL 01, drilled in the Laizhou Bay with a length 452m, was studied. The main results are as follows:①The HLL01 magnetostratigraphy, containing 272 samples with reliable ChRMs and 10 normal and 9 reverse magnetozones, were identified. ②Comparing with the ATNTS2012, the HLL01 magneto⁃stratigraphy recorded C3An.2n to C1n chrons, and its bottom age was about 6.6Ma. ③Boundaries between the Miocene and Plio⁃cene and between the Pliocene and Pleistocene were located at the depth of 340m and 140m, respectively. ④Through comparison with the previous results from the west and north Bohai Sea, it is inferred that in the period since the Late Miocene the area around the Bohai Basin was predominated by thermal subsidence, but the environmental histories in various subunits were different.关键词
莱州湾/磁性地层学/沉积物/上新世/更新世Key words
Laizhou Bay/magnetostratigraphy/sediment/Pliocene/Pleistocene分类
天文与地球科学引用本文复制引用
姜兴钰,易亮,田立柱,施佩歆,陈永胜,王宏,王福,李建芬,商志文..莱州湾南岸HLL01孔磁性地层定年[J].地质通报,2016,35(10):1669-1678,10.基金项目
中国地质调查局项目（编号1212011220484）和国家自然科学基金项目 （）
