Early Eocene to early Miocene radiolarian biostratigraphy for the low-latitude Pacific Ocean

Kamikuri S.-I.; Moore T.C.; Ogane K.; Suzuki N.; P?like H.; Nishi H.

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Early Eocene to early Miocene radiolarian biostratigraphy for the low-latitude Pacific Ocean

机译：低纬太平洋的始新世至中新世早期放射虫生物地层

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A total of 226 early Eocene to early Miocene radiolarian datum events are identified and correlated with the geochronologic time scale at Sites U1331, U1332, and U1333 in the equatorial Pacific Ocean. Seven new radiolarian subzones are proposed for the low-latitude Oligocene: Eucyrtidium diaphanes Interval Subzone (RP22b); Calocycletta (Calocycletta) robusta Interval Subzone (RP22a); Lychnocanoma apodora Interval Subzone (RP21b); Theocyrtis annosa Interval Subzone (RP21a); Eucyrtidium plesiodiaphanes Interval Subzone (RP20c); Dorcadospyris pseudopapilio Interval Subzone (RP20b); Lithocyclia angusta Interval Subzone (RP20a). These subzones significantly improve the biostratigraphic resolution within the Oligocene (an average of one subzone per 1.6 million years [my]). Our study corroborates previous studies, which inferred that primary Oligocene datums were synchronous in the low-latitude Pacific. Four Eocene zones, Cryptocarpium ornatum (RP19), Calocyclas bandyca (RP18), Phormocyrtis striata striata (RP9), and Buryella clinata (RP8) are emended. Two new species/subspecies, Lychnocanoma klausi and Theocorys anaclasta clasta, are described.

机译：在赤道太平洋的U1331，U1332和U1333站点，总共发现了226个始于始新世至中新世的放射虫基准事件，并与年代学时间尺度相关。针对低纬度渐新世提出了七个新的放射虫亚区：透辉石间隔区亚区（RP22b）; Calocycletta（Calocycletta）健壮的间隔子区域（RP22a）;嗅毛腺癌间隔子区（RP21b）;圆环虫（Theocyrtis annosa）间隔子区域（RP21a）;蛇麻藻真核生物间隔区（RP20c）; Dorcadospyris pseudopapilio间隔分区（RP20b）;安息石怪间隔区（RP20a）。这些分区显着提高了渐新世内部的生物地层分辨率（每160万年平均一个分区）[my]。我们的研究证实了以前的研究，这些研究推断原始渐新世基准在低纬度太平洋是同步的。提出了四个始新世带，即Cryptocarpium ornatum（RP19），Colocyclas bandyca（RP18），Phormocyrtis striata striata（RP9）和Buryella clinata（RP8）。描述了两个新的物种/亚种：克氏淋巴瘤和Theocorys anaclasta clasta。

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《Stratigraphy》 |2012年第1期|共32页
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Kamikuri S.-I.; Moore T.C.; Ogane K.; Suzuki N.; P?like H.; Nishi H.;
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1. Early Eocene to early Miocene radiolarian biostratigraphy for the low-latitude Pacific Ocean [J] . Kamikuri S.-I., Moore T.C., Ogane K., Stratigraphy . 2012,第1期

机译：低纬太平洋的始新世至中新世早期放射虫生物地层
2. LOW-LATITUDE MIOCENE CALCAREOUS AND SILICEOUS MICROFOSSIL BIOSTRATIGRAPHY FROM NW SOUTH AMERICA: LADRILLEROS-JUANCHACO SECTION, COLOMBIAN PACIFIC [J] . Felipe Vallejo D., Flores Jose-Abel, Plata Angelo, Ameghiniana: Revista de la Asociacion Paleontologica Argentina . 2016,第6期

机译：来自NW南美洲的低纬度中新世钙质和硅质微生物生物数据库：Ladrilleros-Juanchaco Section，哥伦比亚太平洋
3. Reconstruction of oceanic circulation patterns in the tropical Pacific across the early/middle Miocene boundary as inferred from radiolarian assemblages [J] . Shin-ichi Kamikuri, Theodore C. Moore Palaeogeography, Palaeoclimatology, Palaeoecology: An International Journal for the Geo-Sciences . 2017,第期

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4. Scanning Electron Microscope Studies of Some Early Miocene Diatoms from the Equatorial Pacific Ocean with Descriptions of Two New Species, Actinocyclus jouseae Barron and Actinocyclus nigriniae Barron [C] . John A. Barron Proceedings of the California Academy of Sciences Fourth Series vol.56, no.27-37 amp; Index; 20051230; . 2005

机译：赤道太平洋一些中新世早期硅藻的扫描电子显微镜研究，并描述了两个新种，即放线放线藻（Josinoae Barron）和黑放线放线藻（Actinocyclus nigriniae Barron）
5. Environmental control of radiolarian abundance in the Central Equatorial Pacific and implications for paleoceanographic reconstructions. [D] . Welling, Leigh Ann. 1996

机译：赤道中部太平洋放射虫丰度的环境控制及其对古海洋学重建的影响。
6. Subtropical to temperate late Neogene to Quaternary planktic foraminiferal biostratigraphy across the Kuroshio Current Extension Shatsky Rise northwest Pacific Ocean [O] . Adriane R. Lam, R. Mark Leckie 2020

机译：亚热带将晚间Neogene温带晚期新型综合型综合性传染率的生物数据库在Kuroshio目前的延伸Shatsky崛起西北太平洋
7. Quaternary radiolarian biostratigraphy in the subarctic northeastern Pacific (IODP Expedition 341 Site U1417) and synchroneity of bioevents across the North Pacific [O] . Kenji M. Matsuzaki, Noritoshi Suzuki 2018

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8. Late Miocene to Pleistocene Biostratigraphy of Equatorial Pacific Sediments. [R] . Saito, T., Burckle, L. H., Hays, J. D. 1975

机译：晚中新世至更新世赤道太平洋沉积物生物地层学。

Early Eocene to early Miocene radiolarian biostratigraphy for the low-latitude Pacific Ocean

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