CAJ | 학술논문

本文研究了深海钻探(DSDP)31航次296站晚新生代介形类动物群的性质及其古海洋学意义.此站钻孔上部上新统至全新统以超微浮游生物软泥和粘土为主的16块岩芯中,共分析获得介形类化石8属11种,计有:Poseidonamicus major Benson, P. anteropunctatus Whatley et al., P. punctatus Whatley et al., Pennyella dorsoserrata (Brady), Henryhowella sp., Pterygocythere mucronalatum (Brady), Abyssocythere sp., Abyssocythereis sulcatoperforata (Brady), Pelecocythere sp., Krithe sp. 1和Krithe sp.2.这些介形类属种均为冷海域深海区介形类分子.由此表明,西北太平洋边缘地区在晚新生代曾为一深海区.在第四纪,其深度可能和现今296站的深度大致相当;在上新世,其深度可能更深一些.研究结果证实,深海底栖介形类属种的分布具全球性;在相当长的地质时期内,介形类属种的形态和壳饰都非常稳定,无明显变化.同时,进一步证实,介形类个体大小变化与深度相关,同一种介形类壳体随水域深度加深而增大.
본문연구료심해찬탐(DSDP)31항차296참만신생대개형류동물군적성질급기고해양학의의.차참찬공상부상신통지전신통이초미부유생물연니화점토위주적16괴암심중,공분석획득개형류화석8속11충,계유:Poseidonamicus major Benson, P. anteropunctatus Whatley et al., P. punctatus Whatley et al., Pennyella dorsoserrata (Brady), Henryhowella sp., Pterygocythere mucronalatum (Brady), Abyssocythere sp., Abyssocythereis sulcatoperforata (Brady), Pelecocythere sp., Krithe sp. 1화Krithe sp.2.저사개형류속충균위랭해역심해구개형류분자.유차표명,서북태평양변연지구재만신생대증위일심해구.재제사기,기심도가능화현금296참적심도대치상당;재상신세,기심도가능경심일사.연구결과증실,심해저서개형류속충적분포구전구성;재상당장적지질시기내,개형류속충적형태화각식도비상은정,무명현변화.동시,진일보증실,개형류개체대소변화여심도상관,동일충개형류각체수수역심도가심이증대.
Eleven benthonic ostracod species belonging to eight genera were encountered in core samples ranging in age from the Pliocene to the Holocene of Site 296 of DSDP Leg 31. Almost all the modern descendants of the genera and known species in this study are abyssal inhabitants and their fossil records also originate from the deep-sea sediments in the world ocean during the Cainozoic. The discovery of deep-sea (psychrospheric) ostracods in the studied area indicates that during the Quaternary in the marginal northwestern Pacific, an abyssal depth existed probably as deep as that of the present day, but greater than that in the Pliocene.