Field Activity Details for field activity P207MB

AKA: none

Other ID: P-2-07-MB,MBARI V3029 to 3047

Status: Completed

Organization(s): USGS, Pacific Coastal and Marine Science Center, Monterey Bay Aquarium Research Institute (MBARI)

Funding Program(s): Urban Ocean (MU295)

Principal Investigator(s): Charles Paull

Affiliate Investigator(s): Charlie Paull (MBARI)

Information Specialist(s): Bill Normark

Data Type(s): Location-Elevation: Navigation, Sampling: Geology

Scientific Purpose/Goals: Three days of vibracoring with the ROV Ventanas newly outfitted 14 aluminum cores were planned in the upper Monterey Canyon. The primary goal was to acquire an approximately 130-meter long transect of cores across the sediment waves in the Monterey Canyon floor at water depths of approximately 285 meters. Processing and analysis of these cores will be used to study the origin of the sediment waves. High resolution AUV mapping of the canyon floor and sediment waves was acquired during a previous MBARI cruise on June 18, 2007.

Vehicle(s):

Start Port/Location: Moss Landing, CA

End Port/Location: Moss Landing, CA

Start Date: 2007-06-26

End Date: 2007-06-28

Equipment Used: GPS, vibracore

Information to be Derived: Vibracores up to 14 feet in length with aluminum liners were obtained with the ROV Ventana. The cores were logged on a GeoTek whole-core-logger at USGS on the day following their collection so that results could be used to redirect the ongoing core collection. The cores will be used to study the origin of the sediment waves.

Summary of Activity and Data Gathered: 1400/JD177 R/V Point Lobos departs Moss Landing 1610/JD177 ROV Ventana dives for first core 2200/JD177 ROV Ventana dives for last core 1630/JD177 R/V Point Lobos arrives in Moss Landing 1400/JD178 R/V Point Lobos departs Moss Landing 1515/JD178 ROV Ventana dives for first core 2140/JD178 ROV Ventana dives for last core 2245/JD178 R/V Point Lobos arrives in Moss Landing 1400/JD179 R/V Point Lobos departs Moss Landing 1510/JD179 ROV Ventana dives for first core 2155/JD179 ROV Ventana dives for last core 2300/JD179 R/V Point Lobos arrives in Moss Landing This cruise was the first use of a 14 aluminum core tube with the ROV Ventanas vibracoring system. A Homer Beacon was used to position the cores. The core sites within 60 meters of the beacon were selected by diving to the beacon, then moving off on a course of 290o or 110o to a pre-selected distance. Core sites further away were approached using ROV navigation to locate the general area (~10m) and using the beacon to record the range. Eighteen cores were collected along the transect. The last core was taken where the bottom was suspected to be softer sediment to test the full penetration of the 14 core tube. Cores recovered on the first day recovered a much shorter amount of sediment in the cores than was expected. Before each core was removed from the ROV Ventana, water was drained from the portion of the core tubing not filled with sediment by using a hacksaw to create a small hole in the core tube above the sediment. Cores were then capped, labeled, and split into sections (if core was over 1.5m). Alterations were made on the second and third days of coring to increase the penetration of and recovery in the core tube.

Staff: Mark Aiello

Affiliate Staff:
Rendy Keaten (MBARI) - Scientist
Bill Ussler (MBARI) - Scientist
Jane Curtner (only 6/28/07

MBARI) - Scientist
Michele Morselli (Universita di Ferrara
Italy) - Visiting scientist
Katherine Maier (only 6/26/07

Stanford) - Scientist
Jake Covault (only 6/27/07 and 6/28/07

Stanford) - Scientist
Mark Talkovic (MBARI) - ROV Ventana pilot
Knute Brekke (only 6/26/07 and 6/28/07

MBARI) - ROV Ventana pilot
D.J. Osborne (only 6/26/07 and 6/27/07

MBARI) - ROV Ventana pilot
Ian Young (Captain

MBARI) - Point Lobos crew
Greg Maudlin (MBARI) - Point Lobos crew
Erik Thunstrom (MBARI) - Point Lobos crew
James Boedecker (MBARI) - Point Lobos crew
Frank Flores (only 6/26/07 and 6/27/07

MBARI) - Point Lobos crew
Perry Shoemake (only 6/28/07

MBARI) - Point Lobos crew

Notes: MBARIs remotely operated vehicle (ROV) Ventana was used to obtain vibracores. The ROV Ventana had a 14 aluminum core tube attached to the vibracoring system in addition to the underwater cameras it typically carries. The ROV Ventana is connected to the R/V Point Lobos by a surface slack cable through which it communicates with pilots in the onboard control room. The cores were positioned relative to a Homer Beacon that was placed at (36.7931N, 121.8438 W) during the first dive and removed at the end of the third day of coring.

Staff information imported from InfoBank
Charlie Paull (MBARI) - Chief Scientist
Rendy Keaten (MBARI) - Scientist
Bill Ussler (MBARI) - Scientist
Jane Curtner (only 6/28/07, , MBARI) - Scientist
Michele Morselli (Universita di Ferrara, Italy) - Visiting scientist
Julie (only 6/26/07, , MBARI) - MBARI summer intern
Katherine Maier (only 6/26/07, , Stanford) - Scientist
Jake Covault (only 6/27/07 and 6/28/07, , Stanford) - Scientist
Mark Talkovic (MBARI) - ROV Ventana pilot
Knute Brekke (only 6/26/07 and 6/28/07, , MBARI) - ROV Ventana pilot
D.J. Osborne (only 6/26/07 and 6/27/07, , MBARI) - ROV Ventana pilot
Ian Young (Captain, , MBARI) - Point Lobos crew
Greg Maudlin (MBARI) - Point Lobos crew
Mark Aiello (MBARI) - Point Lobos crew
Erik Thunstrom (MBARI) - Point Lobos crew
James Boedecker (MBARI) - Point Lobos crew
Frank Flores (only 6/26/07 and 6/27/07, , MBARI) - Point Lobos crew
Perry Shoemake (only 6/28/07, , MBARI) - Point Lobos crew

Location:

upper Monterey Canyon

Platform(s):

Publications

Portals/Viewers

Data Acquired