Expedition 357 Scientists (2017): Description of lithologic section units of IODP Hole 357-M0071B [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.872034
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Related to:
Frueh-Green, Gretchen L; Orcutt, Beth N; Green, Sophie; Cotterill, Carol; Expedition 357 Scientists (2016): Atlantis Massif Serpentinization and Life. International Ocean Discovery Program Preliminary Report, International Ocean Discovery Program, https://doi.org/10.14379/iodp.pr.357.2016
Further details:
Project(s):
Coverage:
Latitude: 30.128600 * Longitude: -42.153120
Date/Time Start: 2015-11-18T00:00:00 * Date/Time End: 2015-11-19T00:00:00
Minimum DEPTH, sediment/rock: 0.000 m * Maximum DEPTH, sediment/rock: 4.130 m
Event(s):
357-M0071B (AM-04A) * Latitude: 30.128600 * Longitude: -42.153120 * Date/Time Start: 2015-11-18T00:00:00 * Date/Time End: 2015-11-19T00:00:00 * Elevation: -1380.0 m * IGSN: IBCR0357EHY0001 * Location: Atlantis Massif * Campaign: Exp357 * Basis: James Cook * Comment: RD2, Packer
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Sample code/label | Sample label | Expedition 357 Scientists | DSDP/ODP/IODP sample designation | ||
| 2 | Lithologic unit/sequence | Unit | Expedition 357 Scientists | Visual description | ||
| 3 | DEPTH, sediment/rock | Depth sed | m | Expedition 357 Scientists | Geocode | |
| 4 | Rock type | Rock | Expedition 357 Scientists | Visual description | ||
| 5 | Main Lithology | Main lith | Expedition 357 Scientists | Visual description | ||
| 6 | Lithology/composition/facies | Lithology | Expedition 357 Scientists | Visual description | ||
| 7 | Lithology/composition/facies | Lithology | Expedition 357 Scientists | Visual description | Continuation 1 | |
| 8 | Lithology/composition/facies | Lithology | Expedition 357 Scientists | Visual description | Continuation 2 | |
| 9 | Lithology/composition/facies | Lithology | Expedition 357 Scientists | Visual description | Continuation 3 | |
| 10 | Core disturbance | Disturbance | Expedition 357 Scientists | Visual description | ||
| 11 | Comment | Comment | Expedition 357 Scientists | Visual description | ||
| 12 | Structure | Structure | Expedition 357 Scientists | Visual description | Fracture and foliation | |
| 13 | Structure | Structure | Expedition 357 Scientists | Visual description | Veins | |
| 14 | Structure | Structure | Expedition 357 Scientists | Visual description | Fracture morphology | |
| 15 | Minerals | Minerals | Expedition 357 Scientists | Visual description |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
63 data points
Data
| 1 Sample label (DSDP/ODP/IODP sample designation) | 2 Unit (Visual description) | 3 Depth sed [m] | 4 Rock (Visual description) | 5 Main lith (Visual description) | 6 Lithology (Visual description) | 7 Lithology (Continuation 1, Visual descri...) | 8 Lithology (Continuation 2, Visual descri...) | 9 Lithology (Continuation 3, Visual descri...) | 10 Disturbance (Visual description) | 11 Comment (Visual description) | 12 Structure (Fracture and foliation, Visua...) | 13 Structure (Veins, Visual description) | 14 Structure (Fracture morphology, Visual d...) | 15 Minerals (Visual description) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 357-M0071B-1R-1,0 | 1 | 0.000 | Rubble | Serpentinite rubble | Rubble of serpentinized harzburgites and some talc-amphibole fragments, within moderately consolidated basement-composition matrix (likely amph, chl; 5Y 5/2) towards the bottom of the section. Angular pieces up to 6cm in size. The talc-amphibole clasts | are schistose. Bastite, mostly up to 3mm, serpentinization 100%. Green halos around bastite (late metasomatic event? tc-chl-secondary serp?) that make layers parallel to the main texture.Thin white anostomosing serpentine veins sub parallel to the | prefered orientation of the ribbon mesh texture. Below 27cm the rock fragments are enclosed into a sediment that is locally carbonated. Some carbonate sand present (10YR 8/2). Thin section at 12-15cm is serpentinised harzburgite which contained pyroxene | apparently including olivine grains. Veins include second order birefringent ?serpentine. Semi-quant XRD: 13-14cm - liz (48), cchrys (45), mgt (4), 14-15cm - ant (89), tlc (6), mgt (1), ox (1) | Structures: Open fractures=0 -- No open fractures; Veins=0 -- No veins; Veins=5 -- >20 per 10cm; Foliation=1 -- Weakly foliated | Veins: Shape=3 --Irregular; Connectivity=1 -- Isolated; Connectivity=8 -- Parallel; Texture=1 -- Massive; Structure=1 -- Uniform | Minerals: Amphibole; Bastite; Carbonate; Chlorite; Magnetite; Other; Serpentine; Talc | |||
| 357-M0071B-1R-2,0 | 1 | 0.590 | Metamorphic/Fault Rock | Serpentinized harzburgite | Serpentinized harzburgites with gabbro veins. Serpentinized harzburgite contains bastites and may have some cpx relics. The serpentine mesh is oxided and is dark red in color. The gabbro is very altered into amphibole and chlorite. The contact between | harzburgite and gabbro is gradual over approximately 1cm with polygonal crystal contacts. White sub-vertical thin veins in serpentinites that are carb with serp (branched with Fe-oxide veins). | Structures: Open fractures=0 -- No open fractures; Veins=2 -- 1 - 5 per 10cm; Foliation=0 -- Massive | Veins: Shape=3 --Irregular; Connectivity=1 -- Isolated; Connectivity=3 -- Branched; Texture=1 -- Massive; Structure=2 -- Banded | Fractures: Morphology=No open fractures | Minerals: Amphibole; Bastite; Carbonate; Chlorite; Clinopyroxene; Hydroxides; Magnetite; Serpentine | ||||
| 357-M0071B-2R-1,0 | 1 | 1.720 | Rubble | Serpentinite rubble | Highly fractured serpentinized harzburgites. 0-15cm: Angular fragments to 7cm in size; fragments of serp are oxidised. Some pale green serpentine veins in these fragments. 15cm-END: Matrix-supported breccia with angular fragments to 5cm in poorly | consolidated mud matrix. 22-30cm: Highly fragmented metagabbro, preserved contact with the serp harzburgites. There are other metagabbro pieces at 35cm and 45cm. The metagabbros are highly altered to amphibole and chlorite. They are locally leucocratic. | There are some carb-serp veins in the serp clast below 15cm. 53-66cm: MBIO - Checked - Likely serpentinized harzburgite. | highly | Structures: Open fractures=0 -- No open fractures; Veins=0 -- No veins; Foliation=0 -- Massive; Gabbro crystal-plastic deformation=0 -- Undeformed | Veins: Shape=0 -- No veins | Fractures: Morphology=No open fractures | Minerals: Amphibole; Bastite; Carbonate; Chlorite; Hydroxides; Magnetite; Other; Serpentine | ||
| 357-M0071B-2R-2,0 | 1 | 2.380 | Rubble | Serpentinite rubble | Rubble of serpentinized harburgites. Fragments up to 4cm. 100% serpentinized, patchy alteration in bastite. Mesh texture. There are some white veins into the fragments. | Structures: Open fractures=0 -- No open fractures; Veins=0 -- No veins; Foliation=0 -- Massive | Veins: Shape=0 -- No veins | Fractures: Morphology=No open fractures | Minerals: Bastite; Magnetite; Other; Serpentine | |||||
| 357-M0071B-3R-1,0 | 1 | 3.440 | Rubble | Serpentinite rubble | 0-20 MBIO. Rubble of serpentinized harzburgite with metagabbroic interval. The first fragment (20-22cm) is a serpentinied dunite. Bastite are mostly 2mm in size, 10% modal. The fragments are up to 3cm and a lot of very small fragments, almost sandy. | The fragments at 58-63cm show layer of mostly fresh pyroxenite with opx up to 1cm and cpx up to 8mm, some fresh olivine. There are a few white veins (probably serpentine) in some serpentinized harzburgite fragments (38-41cm and 55-57cm). | Between 69 and 83cm interval of metagabro. Gabbro is intensively altered to chlorite, amphibole, and secondary plag. Initial size of px mostly about 5mm. One sub-vertical chl vein in metagabbro. At the 83cm the smallest fragments | (less than 1cm) are serpentined harzburgite. | Veins to be added (Michelle) | Structures: Open fractures=0 -- No open fractures; Foliation=0 -- Massive; Gabbro crystal-plastic deformation=0 -- Undeformed | Fractures: Morphology=No open fractures | Minerals: Amphibole; Bastite; Chlorite; Clinopyroxene; Magnetite; Orthopyroxene; Other; Plagioclase; Serpentine; Olivine | ||
| 357-M0071B-3R-1,69 | 2 | 4.130 | Metamorphic/Fault Rock | Metagabbro | Metagabbroic interval of solid core. Metagabbro is extensively altered to chlorite, amphibole, and secondary plagioclase. Initial size of px mostly about 5mm. max 7mm. One sub-vertical chl vein in metagabbro. 83cm-END: Gabbroic and serpentinized | harzburgite rubble; the smallest fragments (<1cm) are serpentinized harzburgite. | Structures: Veins=2 -- 1 - 5 per 10cm; Gabbro crystal-plastic deformation=0 -- Undeformed | Veins: Shape=3 --Irregular; Connectivity=2 -- Single; Texture=1 -- Massive; Structure=1 -- Uniform | Minerals: Amphibole; Chlorite; Plagioclase |