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111 results for “Mid Atlantic Ridge”
FIG. 2. — Heptnerina confusa n. gen., n in A new genus and species of deep-sea cyclopoid (Crustacea, Copepoda, Cyclopinidae) from the Mid-Atlantic Ridge (Azores Triple Junction, Lucky Strike)
FIG. 2. — Heptnerina confusa n. gen., n. sp., holotype; A, caudal ramus, ventral; B, rostral and oral area showing labrum and mandibles; C, paragnath; D, paragnath and mandible (part); E, antennule; F, setation of third segment of antennule; G, distal segment of antennule. Scale bars: 0.05 mm.
FIG. 1. — Heptnerina confusa n. gen., n in A new genus and species of deep-sea cyclopoid (Crustacea, Copepoda, Cyclopinidae) from the Mid-Atlantic Ridge (Azores Triple Junction, Lucky Strike)
FIG. 1. — Heptnerina confusa n. gen., n. sp., holotype; A, habitus, dorsal; B, habitus, lateral; C, genital double somite, dorsal; D, genital double somite, ventral; E, gonoporal area and P6, lateral. Scale bars: A, B, 0.2 mm; C-E, 0.05 mm.
Bulk geochemistry and in situ sulfur isotopes of hydrothermal deposits from the Lucky Strike vent field, Mid-Atlantic Ridge
<p>This is the dataset presented in the article <em>"Effects of substrate composition and subsurface fluid pathways on the geochemistry of seafloor hydrothermal deposits at the Lucky Strike Vent Field, Mid-Atlantic Ridge". </em>This includes Tables 1 and 2 found in the article as well as Tables S1 and S2 from the Supporting Information. Table 1 is the chemical composition of hydrothermal samples from the Lucky Strike vent field and Table S1 is an extended version of Table 1 that includes elements that were largely below the detection limit. Table 2 is the dataset for in situ sulfur isotope analyses of marcasite, pyrite, and chalcopyrite for samples from Lucky Strike. Table S2 is a compilation of modern seafloor hydrothermal sites that includes Lucky Strike, Menez Gwen, TAG, Snake Pit, Broken Spur, Rainbow, Logatchev, Beebe, Kairei, Yuhuang-1, and Daxi.</p>
Dataset for the NC article: Deep mantle earthquakes linked to CO2 degassing at the Mid-Atlantic Ridge
<p>The obtained earthquake catalogue, picked P- and S-arrivals, and 1-D velocity models in the Mid-Atlantic Ridge in the equatorial Atlantic ocean, using a recent temporary array of seafloor seismometers.</p> <p>Related article:<br>Yu, Z., Singh, S.C., Hamelin, C. <em>et al.</em> Deep mantle earthquakes linked to CO<sub>2</sub> degassing at the mid-Atlantic ridge. <em>Nat Commun</em> <strong>16</strong>, 563 (2025). https://doi.org/10.1038/s41467-024-55792-9</p>
Biophysical models of persistent connectivity and barriers on the northern Mid-Atlantic Ridge
<p>This contains four data files that are all matlab binary files (.mat)</p> <p><strong>all_vent_sites.mat</strong></p> <p>This is a Matlab data file containing the <strong>longitude (column 1)</strong>, <strong>latitude (column 2)</strong>, of all vent sites used in the simulations. Column 3 specifies whether a vent-site is a <strong>known vent site (=1)</strong> or a <strong>ghost vent-site (=0)</strong></p> <p> </p> <p><strong>probeData_20W60W_04S45N.mat</strong></p> <p>This is a Matlab data file containing data on Argo probe cycles used to estimate average ocean currents that drive the particle tracking simulations. The variables in the file are:</p> <ul> <li><strong>fl</strong> Argo float ID </li> <li><strong>depth </strong>parking depth of the Argo float (m)</li> <li><strong>longlatStart </strong>longitude and latitude for the start of one dive cycle</li> <li><strong>longlatEnd </strong>longitude and latitude for the end of one dive cycle</li> <li><strong>month</strong> month of the dive cycle</li> <li><strong>year</strong> year of the dive cycle</li> <li><strong>timeStep</strong> number of days between the start and end of a dive cycle</li> <li><strong>distStep</strong> distance between the start and end positions of a cycle (km)</li> <li><strong>velocity</strong> average velocity of the Argo float over one dive cycle (km/day)</li> <li><strong>pos</strong> the mid-point position of the Argos float for each cycle</li> </ul> <p> </p> <p> </p> <p><strong>vent_connectivity_data.mat</strong></p> <p>This is a Matlab data file containing the connectivity data from the particle tracking simulations. The variables in this file are:</p> <ul> <li><strong>bbox_all</strong> The coordinates for the 64 target boxes</li> <li><strong>particleCount</strong> The number of larval particles starting in each of the 64 target boxes. This should be 100000 for all target boxes</li> <li><strong>connectTime</strong> A 64x64x500 array giving number of particles making a connection between two target boxes. connectTime(i,j,t) = number of particles from box i that have passed though box j in a time <= t. The 500 times correspond to the vector tVec.</li> <li><strong>leaveTime </strong>A 64x500 array giving the time taken for particles to leave their initial target box. leaveTime(i,t) = number of particles starting in box i that leave the box in a time <=t. The 500 times correspond to the vector tVec.</li> <li><strong>C_critical </strong> Critical connection probability</li> <li><strong>tVec</strong> A vector of simulation times. This should be 500 time points starting at day 1 up to day 500</li> <li><strong>tMax</strong> The maximum simulation time (days)</li> </ul> <p> </p> <p> </p> <p><strong>sim_larval_dispersal.mat</strong></p> <p>This is a Matlab data file that contains the dispersal distances of all the simulated larval particles for six planktonic larval durations. The variables in this file are:</p> <ul> <li><strong>bbox_all </strong>The coordinates for the 64 target boxes</li> <li><strong>tMax</strong> The maximum simulation time (days). This is the planktonic larval duration.</li> <li><strong>distAll </strong>The dispersal distance (km) within a given planktonic larval duration (tMax)</li> <li><strong>startAll</strong> The target box where a simulated larval particle started. The position of this box is given by bbox_all</li> </ul> <p> </p>
Figure 7. Stenothoe menezgweni, DIVA 2 in Stenothoidae (Crustacea: Amphipoda) of hydrothermal vents and surroundings on the Mid-Atlantic Ridge, Azores Triple Junction zone
Figure 7. Stenothoe menezgweni, DIVA 2, PL26, holotype female. Habitus of the holotype.
FIG. 3. — Heptnerina confusa n. gen., n in A new genus and species of deep-sea cyclopoid (Crustacea, Copepoda, Cyclopinidae) from the Mid-Atlantic Ridge (Azores Triple Junction, Lucky Strike)
FIG. 3. — Heptnerina confusa n. gen., n. sp.,
FIGURE 1. Pandanipora fragilis n in Pandanipora fragilis-a new deep-water cyclostome bryozoan from the subequatorial Mid-Atlantic Ridge, Atlantic Ocean, and a review of Pandanipora worldwide
FIGURE 1. Pandanipora fragilis n. sp. Holotype, ZIRAS 1/50732. A. Light photomicrograph of colony fragment. B, D, E, H. General views of the first (B, E) and second (D, H) colony fragments, showing successively arranged zooids with no overlap. C. Lateral view of a tubular peristome. F. Single elongate prop from its inception in the zooid basal wall to the point of breakage. G. Enlargement of a prop, showing the slit-like pseudopores and axially embedded crystallites. I. Zooids at the point of colony bifurcation. J. Growing edge of the colony, showing the initial step of differentiation of a daughter zooid (lower) from the floor of the parent zooid (upper). K. Same, enlargement. L. Colony area at the point of bifurcation and new zooid differentiation. M. External zooidal wall, with pseudopores lacking. N. Floor of an autozooid, showing the communication pores between zooids. O. Oblique view of a peristomial aperture, showing the imbricated, foliated fabric of wedge-shaped crystallites. P. Enlargement of L, showing the different crystallite structures on the external and internal zooidal surfaces. Q. Enlargement of an external zooidal wall, showing the crystallites. R. Enlargement of the internal wall of a peristome, with an imbricated, foliated fabric of wedge-shaped crystallites having irregular margins. Scale bars: A, H, I, 250 μm; B, D, E, 500 μm; C, K, M, N, O, 50 μm; F, J, L, 100 μm; G, P, 25 μm; Q, 15 μm; R, 10 μm.
FIGURE 8. Stygiopontius lomonosovi n in Copepods of the family Dirivultidae (Siphonostomatoida) from deepsea hydrothermal vent fields on the MidAtlantic Ridge at 14 ºN and 5 ºS
FIGURE 8. Stygiopontius lomonosovi n. sp., allotype ɗ: A, antennule; B, antennule, outgrowth of segment 3; C, modified seta of segment 5; D, 6 distalmost segments of antennule, modified setae arrowed; E, maxilliped, anterior; F, maxilliped, posterior.
FIGURE 9. Stygiopontius lomonosovi n in Copepods of the family Dirivultidae (Siphonostomatoida) from deepsea hydrothermal vent fields on the MidAtlantic Ridge at 14 ºN and 5 ºS
FIGURE 9. Stygiopontius lomonosovi n. sp., allotype ɗ: A, distal endopodal segment of leg 1, posterior; B, endopod, inner margin of coxa and basis, intercoxal sclerite of leg 2, anterior; C, distal exopodal segment of leg 3, anterior; D, leg 5, ventral.
FIGURE 7. Stygiopontius lomonosovi n in Copepods of the family Dirivultidae (Siphonostomatoida) from deepsea hydrothermal vent fields on the MidAtlantic Ridge at 14 ºN and 5 ºS
FIGURE 7. Stygiopontius lomonosovi n. sp., allotype ɗ: A, habitus, dorsal; B, ventral view of cephalothorax, position of cephalic appendages marked by dashed circles; C, urosome, dorsal, arrow indicates missing seta; D, urosome, ventral; E, urosome, lateral.
FIGURE 3. Stygiopontius lomonosovi n in Copepods of the family Dirivultidae (Siphonostomatoida) from deepsea hydrothermal vent fields on the MidAtlantic Ridge at 14 ºN and 5 ºS
FIGURE 3. Stygiopontius lomonosovi n. sp., holotype Ψ: A, habitus, dorsal; B, urosome, dorsal; C, right genital field, seta of right leg 6; D, ventrolateral outgrowth near posterior edge of genital doublesomite; E, anal somite and caudal rami, dorsal; F, anal somite and left caudal ramus, lateral. Arrows indicate missing setae.
FIGURE 1 in Copepods of the family Dirivultidae (Siphonostomatoida) from deepsea hydrothermal vent fields on the MidAtlantic Ridge at 14 ºN and 5 ºS
FIGURE 1. MidAtlantic Ridge: A, Logachev hydrothermal field at 14°N, IRINA II site, musselbed of Bathymodiolus puteoserpentis, at the southwest from the smokercomplex; B, Turtle Pits hydrothermal site at 5°S, active chimney "Tower" with alvinocaridid shrimps of different size. (Photos courtesy by MARUM© 2005, University of Bremen.)
FIGURE 4. Stygiopontius lomonosovi n in Copepods of the family Dirivultidae (Siphonostomatoida) from deepsea hydrothermal vent fields on the MidAtlantic Ridge at 14 ºN and 5 ºS
FIGURE 4. Stygiopontius lomonosovi n. sp., holotype Ψ: A, antennule, arrows indicate 1 missing and 2 short seta; B, antenna, arrow indicates short seta; C, mandible; D, maxillule, arrow indicates short seta; E, outer lobe of maxillule, arrow indicates short seta.
FIGURE 6. Stygiopontius lomonosovi n in Copepods of the family Dirivultidae (Siphonostomatoida) from deepsea hydrothermal vent fields on the MidAtlantic Ridge at 14 ºN and 5 ºS
FIGURE 6. Stygiopontius lomonosovi n. sp., holotype Ψ: A, leg 3, posterior; B, distal exopodal segment of leg 3, posterior; C, leg 4, anterior, arrows indicate missing spines; D, leg 5, left, lost seta arrowed; E, leg 6, left.
FIGURE 2 in Copepods of the family Dirivultidae (Siphonostomatoida) from deepsea hydrothermal vent fields on the MidAtlantic Ridge at 14 ºN and 5 ºS
FIGURE 2. MidAtlantic Ridge, Red Lion hydrothermal site at 5°S: A, active chimney "Shrimps Farm", white spots=swimming shrimps; B, aggregation of alvinocaridid shrimps (Rimicaris sp.) on the chimney "Shrimps Farm". (Photos courtesy by MARUM© 2005, University of Bremen.)
FIGURE 5. Stygiopontius lomonosovi n in Copepods of the family Dirivultidae (Siphonostomatoida) from deepsea hydrothermal vent fields on the MidAtlantic Ridge at 14 ºN and 5 ºS
FIGURE 5. Stygiopontius lomonosovi n. sp., holotype Ψ: A, maxilla; B, maxilliped, posterior view; C, leg 1, anterior; D, leg 2, anterior.
FIGURE 2 in A new vent shrimp (Crustacea: Decapoda: Alvinocarididae) from the Mid-Atlantic Ridge *
FIGURE 2. Opaepele vavilovi nov. sp. Holotype female (cl 8.1 mm): A, second maxilliped; B, third maxilliped; C, first pereopod; D, second pereopod; E, third pereopod; F, third pereopod, dactylus and distal part of propodus; G, fourth pereopod; H, appendix masculina and appendix interna. Scale bars = 1 mm.
FIGURE 1 in A new vent shrimp (Crustacea: Decapoda: Alvinocarididae) from the Mid-Atlantic Ridge *
FIGURE 1. Opaepele vavilovi nov. sp. Holotype female (cl 8.1 mm): A, rostrum, lateral view; B, carapace and cephalic appendages, lateral view; C, anterior part of carapace and cephalic appendages, dorsal view; D, abdominal somites, lateral view; E, telson. Scale bars = 1 mm.
FIGURE 12. Gnathophausia scapularis Ortmann, 1906. A, ventral view B in A taxonomical review of the Gnathophausia (Crustacea, Lophogastrida), with new records from the northern mid-Atlantic ridge
FIGURE 12. Gnathophausia scapularis Ortmann, 1906. A, ventral view B, dorsal view (from Tattersall 1939: figs 1–2).
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