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Site U1335

Site U1335
Site U1335
Integrated Ocean Drilling Program (IODP) Site U1335 (5°18.735?N, 126°17.002?W; 4327.5 meters below sea level [mbsl]) (Fig. F1; Table T1) is located in the central area drilled during the Pacific Equatorial Age Transect (PEAT) program (IODP Expedition 320/321). Site U1335 (~26 Ma crust) is situated halfway between IODP Site U1336 ~340 km to the northwest and IODP Site U1337 ~390 km to the southeast, ~250 km south of the Clipperton Fracture Zone. Site U1335 is located on a broad plateau within north-northeast–trending abyssal hill topography. Thick sediment deposits cover the abyssal hills, with a thinning sediment cover on the hills. Site U1335 is draped with ~420 m of sediment cover (Fig. F2), estimated to be ~360 m prior to drilling. Water depth in the vicinity of Site U1335 is between 4300 and 4400 m, apart from the topography around seamounts that are 15–20 km away from the drill site (Fig. F1B).

Based on stage-pole reconstructions of Pacific plate motion and observations of basement age from previous drilling sites, along with magnetic anomaly maps (Cande et al., 1989), we estimated prior to drilling that Site U1335 is located on 26 Ma crust. The best control on age is information from Deep Sea Drilling Project (DSDP) Site 79, located ~600 km and 4.5° east and 3° south of Site U1335, apparently on the same fracture zone segment, with the Clipperton Fracture Zone to the north. The base of Site 79 reaches the Miocene/Oligocene boundary, or ~23 Ma on the most recent astronomically calibrated timescales.

Site U1335 was proposed for drilling to focus on the paleoceanographic events in the late Oligocene and into the early and middle Miocene, including the climatically significant Oligocene–Miocene transition and recovery from the Mi-1 glaciation event. In conjunction with Sites U1336 and U1337, it was also designed to provide a latitudinal transect for early Miocene age slices.
1-115
Integrated Ocean Drilling Program Management International, Inc
Pälike, Heiko
b9bf7798-ad8c-479b-8487-dd9a30a61fa5
Nishi, Hiroshi
8f3b93ee-0878-4e32-afe1-1d8192f09e07
Lyle, Mitchell
679ab0ed-6986-4198-b8fa-ea80793df449
Raffi, Isabella
ae99d733-dc7b-4580-95ee-f3426a6cfafb
Gamage, Kusali
7d5669f2-acf0-497e-ba4f-d1ca2615a56a
Klaus, Adam
0efdbb3a-0202-4753-b93b-c8b15a86b857
Pälike, Heiko
b9bf7798-ad8c-479b-8487-dd9a30a61fa5
Nishi, Hiroshi
8f3b93ee-0878-4e32-afe1-1d8192f09e07
Lyle, Mitchell
679ab0ed-6986-4198-b8fa-ea80793df449
Raffi, Isabella
ae99d733-dc7b-4580-95ee-f3426a6cfafb
Gamage, Kusali
7d5669f2-acf0-497e-ba4f-d1ca2615a56a
Klaus, Adam
0efdbb3a-0202-4753-b93b-c8b15a86b857

Pälike, Heiko, Nishi, Hiroshi, Lyle, Mitchell, Raffi, Isabella, Gamage, Kusali and Klaus, Adam (2010) Site U1335. In Proceedings of the Integrated Ocean Drilling Program, Volume 320/321. Integrated Ocean Drilling Program Management International, Inc. pp. 1-115 . (doi:10.2204/iodp.proc.320321.107.2010).

Record type: Conference or Workshop Item (Paper)

Abstract

Integrated Ocean Drilling Program (IODP) Site U1335 (5°18.735?N, 126°17.002?W; 4327.5 meters below sea level [mbsl]) (Fig. F1; Table T1) is located in the central area drilled during the Pacific Equatorial Age Transect (PEAT) program (IODP Expedition 320/321). Site U1335 (~26 Ma crust) is situated halfway between IODP Site U1336 ~340 km to the northwest and IODP Site U1337 ~390 km to the southeast, ~250 km south of the Clipperton Fracture Zone. Site U1335 is located on a broad plateau within north-northeast–trending abyssal hill topography. Thick sediment deposits cover the abyssal hills, with a thinning sediment cover on the hills. Site U1335 is draped with ~420 m of sediment cover (Fig. F2), estimated to be ~360 m prior to drilling. Water depth in the vicinity of Site U1335 is between 4300 and 4400 m, apart from the topography around seamounts that are 15–20 km away from the drill site (Fig. F1B).

Based on stage-pole reconstructions of Pacific plate motion and observations of basement age from previous drilling sites, along with magnetic anomaly maps (Cande et al., 1989), we estimated prior to drilling that Site U1335 is located on 26 Ma crust. The best control on age is information from Deep Sea Drilling Project (DSDP) Site 79, located ~600 km and 4.5° east and 3° south of Site U1335, apparently on the same fracture zone segment, with the Clipperton Fracture Zone to the north. The base of Site 79 reaches the Miocene/Oligocene boundary, or ~23 Ma on the most recent astronomically calibrated timescales.

Site U1335 was proposed for drilling to focus on the paleoceanographic events in the late Oligocene and into the early and middle Miocene, including the climatically significant Oligocene–Miocene transition and recovery from the Mi-1 glaciation event. In conjunction with Sites U1336 and U1337, it was also designed to provide a latitudinal transect for early Miocene age slices.

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Published date: October 2010

Identifiers

Local EPrints ID: 170027
URI: http://eprints.soton.ac.uk/id/eprint/170027
PURE UUID: 038a2383-8499-4683-a744-0fbb45468c73

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Date deposited: 04 Jan 2011 16:19
Last modified: 14 Mar 2024 02:22

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Contributors

Author: Heiko Pälike
Author: Hiroshi Nishi
Author: Mitchell Lyle
Author: Isabella Raffi
Author: Kusali Gamage
Author: Adam Klaus

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