![]() ![]() The hole was verified as clear by the chisel tool. A replacement barrel also failed to latch. This was taken as the start of a new hole, Hole M0005B, at 1840 h on 8 October.Īt 0140 h on 9 October, the core barrel failed to latch in at 20 mbsf. Good core was obtained, and it appeared that the borehole had been restarted in a deviation or had avoided a previous deviation. When reentering the hole after one particular drill string trip to remove a core blockage from the bit, coring appeared to recommence at 10.4 meters below seafloor (mbsf). Core barrel jams and problems with blocked bit–related mislatching led to slow progress in this hole. The first cores displayed large cavities, and recovery was poor. Thereafter, coring continued with difficult barrel latching, and short core runs were used to avoid drilling rather than coring until the best coring parameters were established. The first core arrived on deck at 2000 h. After removing the camera, the HQ (piggyback) drill string was run through the API conductor to the seabed and coring operations in Hole M0005A commenced. A suitable site was located ~2 m from the planned position, and the DART was placed on the seabed with 8 T of weight. From 1335 h, a seabed survey around the position of the first site was conducted using the downpipe underwater camera. ![]() By 0250 h on 7 October, the vessel was in position to start drilling.Īfter overcoming problems with a hydraulic ram that caused the moonpool doors to fail to open, Seacore’s drilling and reentry template (DART) was deployed on an American Petroleum Institute (API) drill string (used as conductor pipe for this expedition) to just above the seabed. The DP Hunter arrived at Site M0005 at 2330 h on 6 October 2005 and immediately conducted dynamic positioning (DP) calibration tests ~250 m south of the first hole, Hole M0005A. Wireline logging data, Hole M0007B.ĭoi:10.2204/iodp.proc.310.105.2007 Maraa western transect: Sites M0005–M0007 1 Expedition 310 Scientists 2 Operations Holes M0005A and M0005B MSCL resistivity and downhole resistivity, Site M0009. MSCL velocity, downhole sonic log data, and discrete measurements, Hole M0005D. Pavona with a volcanic sediment–rich grainstone matrix. Acropora in a volcanic sediment–rich matrix. ![]() Porites in a volcanic sediment–rich matrix. Coralgal rudstone with lithoclasts and volcanic grains. Porites embedded in volcanic-rich sediment. Volcaniclastic silt to sand with Halimeda floatstone. Skeletal rudstone with rhodoliths and a molluscan shell. ![]() Skeletal rudstone with rhodoliths and coral fragments. Porites and Pocillopora with microbialites. Pocillopora with laminated to thrombolitic microbialites. Pocillopora with laminated microbialites. Pocillopora with microbial encrustations. Pocillopora with thrombolitic microbialite masses. Laminated fabrics and thrombolitic masses in microbialites. Dendritic and columnar accretions in microbialites. Rhodoliths and Halimeda segments in modern sediment. Coralline algal crusts in modern sediment.
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