Planktonic foraminifera stratigraphy and datums of ODP Site 184-1143 and Hole 184-1146A, South China Sea


Autoria(s): Nathan, Stephen A; Leckie, R Mark
Cobertura

MEDIAN LATITUDE: 14.409305 * MEDIAN LONGITUDE: 114.778940 * SOUTH-BOUND LATITUDE: 9.361880 * WEST-BOUND LONGITUDE: 113.285030 * NORTH-BOUND LATITUDE: 19.456680 * EAST-BOUND LONGITUDE: 116.272710 * DATE/TIME START: 1999-03-03T16:00:00 * DATE/TIME END: 1999-03-25T13:30:00

Data(s)

18/06/2003

Resumo

The biostratigraphy of Miocene-age sediment samples recovered from Ocean Drilling Program Sites 1143 and 1146, South China Sea, is presented. The preservation of the planktonic foraminifers recovered from both sites varies widely, from poor to very good. The volume of biogenic sediment in the >63-µm size fraction also varies considerably, with many samples being dominated by mud. In comparison to shipboard biostratigraphy, based on core catcher analyses with a depth resolution of ~10 m, we analyzed samples from the two stratigraphic columns every 2-3 m (~45- to 93-k.y. resolution). The placement of planktonic foraminifer zonal boundaries was made at a resolution of ~1.5 m at Site 1146 and ~3.0 m at Site 1143. The higher resolution has resulted in significant changes in biostratigraphic zonal boundary locations compared to shipboard results. For the time interval of 5.54-10.49 Ma, the changes in zonation reveal similar age-depth models at both sites, with three segments of changing sedimentation rate through the upper Miocene, though the differences in sedimentation rates at Site 1146 are subtler than those at Site 1143. The boundary between lithologic Units II and III at Site 1146 corresponds to a sharp change in sedimentation rate (58 to 21 m/m.y.) at 15.1 Ma (the first occurrence of Orbulina suturalis). At this site, the interval from 16.4 to 15.1 Ma is characterized by very high mass accumulation rates in the noncarbonate fraction. Above this interval the carbonate fraction becomes increasingly important in the sediment flux to the South China Sea. At Site 1143, sedimentation rates increase from 8 to 99 m/m.y. at 8.6 Ma. This corresponds to a dramatic increase in both carbonate and noncarbonate mass accumulation rates at the site, but no change in lithology.

Formato

application/zip, 4 datasets

Identificador

https://doi.pangaea.de/10.1594/PANGAEA.784361

doi:10.1594/PANGAEA.784361

Idioma(s)

en

Publicador

PANGAEA

Direitos

CC-BY: Creative Commons Attribution 3.0 Unported

Access constraints: unrestricted

Fonte

Supplement to: Nathan, Stephen A; Leckie, R Mark (2003): Miocene planktonic foaminiferal biostratigraphy of Sites 1143 and 1146, ODP Leg 184, South China Sea. In: Prell, WL; Wang, P; Blum, P; Rea, DK; Clemens, SC (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 184, 1-43, doi:10.2973/odp.proc.sr.184.219.2003

Palavras-Chave #1 = sample having very few foraminifers after standard washing. 2 = sample rich in aggregates of clay after standard washing; contains few planktonic foraminifers.; 1 = sample having very few foraminifers after standard washing. 2 = sample rich in aggregates of clay after standard washing; contains few planktonic foraminifers. 3 = ash layer; very few planktonic foraminifers.; 184-1143A; 184-1143C; 184-1146A; Abundance estimate; Age model; Age model, Berggren et al (1995) BKSA95; Ageprof dat des; Ageprofile Datum Description; ages of samples 184-1146A-33X and 184-1146A-41X to 51X are astrochronologically tuned (after Bergren et al., 1995; Chaisson and Pearson, 1997, doi:10.2973/odp.proc.sr.154.104.1997; and Curry et al., 1995, doi:10.2973/odp.proc.ir.154.1995); age tuned also after Chaisson and Pearson (1997, doi:10.2973/odp.proc.sr.154.104.1997); B. praedigitata; Beella praedigitata; bottom; C. dissimilis; C. nitida; C. parvulus; C. unicavus; Candeina nitida; Catapsydrax dissimilis; Catapsydrax parvulus; Catapsydrax unicavus; D. altispira; Dentoglobigerina altispira; Depth; Depth, bottom/max; Depth, composite; Depth, composite bottom; Depth, composite top; DEPTH, sediment/rock; Depth, top/min; Depth bot; Depth c bot; Depth comp; Depth c top; Depth top; DRILL; Drilling/drill rig; Event; FO = first occurrence, LO = last occurrence; Foraminifera, planktic preservation; Foram plankt preserv; G. aequilateralis; G. altiapertura; G. apertura; G. archeomenardii; G. baroemoenensis; G. binaiensis; G. birnageae; G. bisphericus; G. bulloides; G. cibaoensis; G. conglobatus; G. conoidea; G. decoraperta; G. dehiscens; G. druryi; G. extremus; G. falconensis; G. fohsi; G. glutinata; G. hexagona; G. insueta; G. juanai; G. lenguaensis; G. limbata; G. margaritae; G. menardii; G. merotumida; G. mitra; G. multicamerata; G. nepenthes; G. obesa; G. obliquus; G. peripheroacuta; G. peripheroronda; G. plesiotumida; G. praebulloides; G. praefohsi; G. praemenardii; G. praescitula; G. ruber; G. sacculifer; G. scitula; G. sellii; G. subquadratus; G. trilobus; G. tumida; G. uvula; G. variabilis; G. venezuelana; G. woodi; G. zealandica; Globigerina bulloides; Globigerina falconensis; Globigerina praebulloides; Globigerinatella insueta; Globigerinella aequilateralis; Globigerinella obesa; Globigerinita glutinata; Globigerinita uvula; Globigerinoides altiapertura; Globigerinoides bisphericus; Globigerinoides conglobatus; Globigerinoides extremus; Globigerinoides mitra; Globigerinoides obliquus; Globigerinoides ruber; Globigerinoides sacculifer; Globigerinoides subquadratus; Globigerinoides trilobus; Globoquadrina baroemoenensis; Globoquadrina binaiensis; Globoquadrina dehiscens; Globoquadrina sellii; Globoquadrina venezuelana; Globorotalia archeomenardii; Globorotalia birnageae; Globorotalia cibaoensis; Globorotalia conoidea; Globorotalia fohsi; Globorotalia juanai; Globorotalia lenguaensis; Globorotalia limbata; Globorotalia margaritae; Globorotalia menardii; Globorotalia merotumida; Globorotalia multicamerata; Globorotalia peripheroacuta; Globorotalia peripheroronda; Globorotalia plesiotumida; Globorotalia praefohsi; Globorotalia praemenardii; Globorotalia praescitula; Globorotalia scitula; Globorotalia tumida; Globorotalia zealandica; Globorotaloides hexagona; Globorotaloides variabilis; Globoturborotalita apertura; Globoturborotalita decoraperta; Globoturborotalita druryi; Globoturborotalita nepenthes; Globoturborotalita woodi; Joides Resolution; Label; Label 2; Leg184; N. acostaensis; N. continuosa; N. humerosa; N. pachyderma; Nannofossil zone; Nannos zone; Neogloboquadrina acostaensis; Neogloboquadrina continuosa; Neogloboquadrina humerosa; Neogloboquadrina pachyderma; O. bilobata; O. suturalis; O. universa; Ocean Drilling Program; ODP; ODP sample designation; Orbulina bilobata; Orbulina suturalis; Orbulina universa; P. glomerosa; P. mayeri; P. nana; P. primalis; P. sicana; Paragloborotalia mayeri; Paragloborotalia nana; Praeorbulina glomerosa; Praeorbulina sicana; Pulleniatina primalis; S. dehiscens; S. kochi; s.l.; S. paenedehiscens; S. seminulina; Samp com; Sample code/label; Sample code/label 2; Sample comment; South China Sea; Sphaeroidinella dehiscens; Sphaeroidinellopsis kochi; Sphaeroidinellopsis paenedehiscens; Sphaeroidinellopsis seminulina; top; VG = <20% fragments, G = 20%-50% fragments, P = >50% fragments; NA = not applicable, ash layer.; VG = <20% fragments, G = 20%-50% fragments, P = >50% fragments.
Tipo

Dataset