Geochemistry of Neogene-Quaternary sediments in ODP Site 105-645
Subcontinuously cored early(?)-middle Miocene to recently deposited sediments from ODP Site 645 were studied texturally, mineralogically, and geochemically. The entire sequence contains minerals and associated chemical elements that are chiefly of detrital origin. In particular, the clay minerals, w...
Main Authors: | , , , , , |
---|---|
Format: | Other/Unknown Material |
Language: | English |
Published: |
PANGAEA
1989
|
Subjects: | |
Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.745176 https://doi.org/10.1594/PANGAEA.745176 |
id |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.745176 |
---|---|
record_format |
openpolar |
spelling |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.745176 2024-09-15T17:56:58+00:00 Geochemistry of Neogene-Quaternary sediments in ODP Site 105-645 Thiébault, Francois Cremer, Michel Debrabant, Pierre Foulon, J Nielsen, Ole Bjorslev Zimmerman, Herman MEDIAN LATITUDE: 68.555859 * MEDIAN LONGITUDE: -78.725857 * SOUTH-BOUND LATITUDE: 53.009500 * WEST-BOUND LONGITUDE: 164.713500 * NORTH-BOUND LATITUDE: 70.458000 * EAST-BOUND LONGITUDE: -64.655000 * DATE/TIME START: 1971-07-30T00:00:00 * DATE/TIME END: 1985-09-27T20:30:00 1989 application/zip, 5 datasets https://doi.pangaea.de/10.1594/PANGAEA.745176 https://doi.org/10.1594/PANGAEA.745176 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.745176 https://doi.org/10.1594/PANGAEA.745176 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Thiébault, Francois; Cremer, Michel; Debrabant, Pierre; Foulon, J; Nielsen, Ole Bjorslev; Zimmerman, Herman (1989): Analysis of sedimentary facies, clay mineralogy, and geochemistry of the Neogene-Quaternary sediments in ODP Site 645, Baffin Bay. In: Srivastava, SP; Arthur, M; Clement, B; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 105, 83-100, https://doi.org/10.2973/odp.proc.sr.105.111.1989 105-645D 105-645E 19-184B 19-189 19-192A Baffin Bay Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Joides Resolution Leg105 Leg19 North Pacific/Bering Strait/PLATEAU North Pacific/Bering Strait/RIDGE North Pacific/GUYOT Ocean Drilling Program ODP dataset publication series 1989 ftpangaea https://doi.org/10.1594/PANGAEA.74517610.2973/odp.proc.sr.105.111.1989 2024-07-24T02:31:20Z Subcontinuously cored early(?)-middle Miocene to recently deposited sediments from ODP Site 645 were studied texturally, mineralogically, and geochemically. The entire sequence contains minerals and associated chemical elements that are chiefly of detrital origin. In particular, the clay minerals, which include smectite, kaolinite, chlorite, and illite, are detrital. No obvious evidence of diagenesis with depth, of burial, of volcanism, or of hydrothermal alteration was observed. The sedimentary textures, clay mineralogy, and <2-µm fraction geochemistry of the early middle Miocene sediments (630 to 1147 mbsf) suggest the pronounced but variable influence of a southward bottom current. Two clay facies are defined. The lower one, Cj (780 to 1147 mbsf), is characterized by the great abundance of discrete smectite (with less than 15% illite interlayers), probably detrital in origin, and reworked older, discrete, smectite-rich sediments. The upper clay facies, C2 (630 to 780 mbsf), shows a net decrease of the fully expandable clay abundances, with a great abundance of mixed-layer, illite-smectite clays (60 to 80% of illite interlayers). Such clay assemblages can be inherited from paleosoils or older sedimentary rocks. An important change occurs at 630 mbsf (clay fraction) or 600 mbsf (sedimentary texture), which may be explained by the beginning of continental glaciation (630 mbsf, ~9 Ma) and the onset of ice rafting in Baffin Bay (600 mbsf, ~8 Ma). Above this level, the characteristics and modifications of the clay assemblages are controlled climatically and can be explained by the fluctuations of (1) ice-rafting, (2) speed of weak bottom currents, and (3) some supply by mud turbiditic currents. Three clay facies (C3, C4, and C5) can be defined by the abrupt increases of the inherited chlorite and illite clays. Other/Unknown Material Baffin Bay Baffin Bay Baffin Bering Strait PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(164.713500,-64.655000,70.458000,53.009500) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
105-645D 105-645E 19-184B 19-189 19-192A Baffin Bay Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Joides Resolution Leg105 Leg19 North Pacific/Bering Strait/PLATEAU North Pacific/Bering Strait/RIDGE North Pacific/GUYOT Ocean Drilling Program ODP |
spellingShingle |
105-645D 105-645E 19-184B 19-189 19-192A Baffin Bay Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Joides Resolution Leg105 Leg19 North Pacific/Bering Strait/PLATEAU North Pacific/Bering Strait/RIDGE North Pacific/GUYOT Ocean Drilling Program ODP Thiébault, Francois Cremer, Michel Debrabant, Pierre Foulon, J Nielsen, Ole Bjorslev Zimmerman, Herman Geochemistry of Neogene-Quaternary sediments in ODP Site 105-645 |
topic_facet |
105-645D 105-645E 19-184B 19-189 19-192A Baffin Bay Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Joides Resolution Leg105 Leg19 North Pacific/Bering Strait/PLATEAU North Pacific/Bering Strait/RIDGE North Pacific/GUYOT Ocean Drilling Program ODP |
description |
Subcontinuously cored early(?)-middle Miocene to recently deposited sediments from ODP Site 645 were studied texturally, mineralogically, and geochemically. The entire sequence contains minerals and associated chemical elements that are chiefly of detrital origin. In particular, the clay minerals, which include smectite, kaolinite, chlorite, and illite, are detrital. No obvious evidence of diagenesis with depth, of burial, of volcanism, or of hydrothermal alteration was observed. The sedimentary textures, clay mineralogy, and <2-µm fraction geochemistry of the early middle Miocene sediments (630 to 1147 mbsf) suggest the pronounced but variable influence of a southward bottom current. Two clay facies are defined. The lower one, Cj (780 to 1147 mbsf), is characterized by the great abundance of discrete smectite (with less than 15% illite interlayers), probably detrital in origin, and reworked older, discrete, smectite-rich sediments. The upper clay facies, C2 (630 to 780 mbsf), shows a net decrease of the fully expandable clay abundances, with a great abundance of mixed-layer, illite-smectite clays (60 to 80% of illite interlayers). Such clay assemblages can be inherited from paleosoils or older sedimentary rocks. An important change occurs at 630 mbsf (clay fraction) or 600 mbsf (sedimentary texture), which may be explained by the beginning of continental glaciation (630 mbsf, ~9 Ma) and the onset of ice rafting in Baffin Bay (600 mbsf, ~8 Ma). Above this level, the characteristics and modifications of the clay assemblages are controlled climatically and can be explained by the fluctuations of (1) ice-rafting, (2) speed of weak bottom currents, and (3) some supply by mud turbiditic currents. Three clay facies (C3, C4, and C5) can be defined by the abrupt increases of the inherited chlorite and illite clays. |
format |
Other/Unknown Material |
author |
Thiébault, Francois Cremer, Michel Debrabant, Pierre Foulon, J Nielsen, Ole Bjorslev Zimmerman, Herman |
author_facet |
Thiébault, Francois Cremer, Michel Debrabant, Pierre Foulon, J Nielsen, Ole Bjorslev Zimmerman, Herman |
author_sort |
Thiébault, Francois |
title |
Geochemistry of Neogene-Quaternary sediments in ODP Site 105-645 |
title_short |
Geochemistry of Neogene-Quaternary sediments in ODP Site 105-645 |
title_full |
Geochemistry of Neogene-Quaternary sediments in ODP Site 105-645 |
title_fullStr |
Geochemistry of Neogene-Quaternary sediments in ODP Site 105-645 |
title_full_unstemmed |
Geochemistry of Neogene-Quaternary sediments in ODP Site 105-645 |
title_sort |
geochemistry of neogene-quaternary sediments in odp site 105-645 |
publisher |
PANGAEA |
publishDate |
1989 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.745176 https://doi.org/10.1594/PANGAEA.745176 |
op_coverage |
MEDIAN LATITUDE: 68.555859 * MEDIAN LONGITUDE: -78.725857 * SOUTH-BOUND LATITUDE: 53.009500 * WEST-BOUND LONGITUDE: 164.713500 * NORTH-BOUND LATITUDE: 70.458000 * EAST-BOUND LONGITUDE: -64.655000 * DATE/TIME START: 1971-07-30T00:00:00 * DATE/TIME END: 1985-09-27T20:30:00 |
long_lat |
ENVELOPE(164.713500,-64.655000,70.458000,53.009500) |
genre |
Baffin Bay Baffin Bay Baffin Bering Strait |
genre_facet |
Baffin Bay Baffin Bay Baffin Bering Strait |
op_source |
Supplement to: Thiébault, Francois; Cremer, Michel; Debrabant, Pierre; Foulon, J; Nielsen, Ole Bjorslev; Zimmerman, Herman (1989): Analysis of sedimentary facies, clay mineralogy, and geochemistry of the Neogene-Quaternary sediments in ODP Site 645, Baffin Bay. In: Srivastava, SP; Arthur, M; Clement, B; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 105, 83-100, https://doi.org/10.2973/odp.proc.sr.105.111.1989 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.745176 https://doi.org/10.1594/PANGAEA.745176 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.74517610.2973/odp.proc.sr.105.111.1989 |
_version_ |
1810433174008758272 |