Expedition 357 Scientists (2017): Description of lithologic section units of IODP Hole 357-M0075B [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.872040
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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: 30.127500 * Longitude: -42.066170
Date/Time Start: 2015-11-29T00:00:00 * Date/Time End: 2015-11-30T00:00:00
Minimum DEPTH, sediment/rock: 0.000 m * Maximum DEPTH, sediment/rock: 5.272 m
Event(s):
357-M0075B (AM-03A) * Latitude: 30.127500 * Longitude: -42.066170 * Date/Time Start: 2015-11-29T00:00:00 * Date/Time End: 2015-11-30T00:00:00 * Elevation: -1568.0 m * IGSN: IBCR0357EH31001 * Location: Atlantis Massif * Campaign: Exp357 * Basis: James Cook * Comment: RD2, check position
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 | Lithology/composition/facies | Lithology | Expedition 357 Scientists | Visual description | Continuation 4 | |
| 11 | Lithology/composition/facies | Lithology | Expedition 357 Scientists | Visual description | Continuation 5 | |
| 12 | Percentage | Perc | % | Expedition 357 Scientists | Visual description | Main lithology |
| 13 | Comment | Comment | Expedition 357 Scientists | Visual description | ||
| 14 | Color code HLS-system | Color HLS | Expedition 357 Scientists | Munsell Color System (1994) | ||
| 15 | Structure | Structure | Expedition 357 Scientists | Visual description | Fracture and foliation | |
| 16 | Structure | Structure | Expedition 357 Scientists | Visual description | Veins | |
| 17 | Structure | Structure | Expedition 357 Scientists | Visual description | Fracture morphology | |
| 18 | Minerals | Minerals | Expedition 357 Scientists | Visual description | ||
| 19 | Alteration | Alteration | Expedition 357 Scientists | Visual description |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
92 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 Lithology (Continuation 4, Visual descri...) | 11 Lithology (Continuation 5, Visual descri...) | 12 Perc [%] (Main lithology, Visual descri...) | 13 Comment (Visual description) | 14 Color HLS (Munsell Color System (1994)) | 15 Structure (Fracture and foliation, Visua...) | 16 Structure (Veins, Visual description) | 17 Structure (Fracture morphology, Visual d...) | 18 Minerals (Visual description) | 19 Alteration (Visual description) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 357-M0075B-1R-1,0 | 1 | 0.000 | Sediment | Basaltic breccia | Sedimentary breccia with clasts of basalts. The basalts show aphyric texture with vesicles < 1mm. Some have a very thin coating of Fe-Mn-oxides and oxidation rims up to 0.5cm in thickness. Interval 0-12cm only contains sediments, which are made of | foraminiferous ooze and fragments of shells. Interval 12-31cm contains two basalt clasts (6cm + 5cm in size). Interval 31 + contains smaller pieces of basalts and greenish clays that could be chlorite-talc. | 10YR 7/4 | Structures: Open fractures=2 -- 1-5 per 10cm; Veins=0 -- No veins; Foliation=0 -- Massive | Veins: Shape=0 -- No veins | Fractures: Morphology=Irregular | Minerals: Carbonate; Other | |||||||
| 357-M0075B-2R-1,0 | 1 | 2.278 | Rubble | Mixed rubble | Pebbles and fragments of variably deformed talc-rich schists and basalts that are locally rounded. The fragments range in size from 0.5 to 3cm. | Protolith to be defined after TS | Minerals: Amphibole; Chlorite; Other; Oxides; Plagioclase; Talc | |||||||||||
| 357-M0075B-2R-1,9 | 2 | 2.368 | Rubble | Talc-amphibole schist rubble | Light green to dark fragments - possibly drilling-induced - (mud, sand-sized up to 4cm) of highly foliated talc-schist. Thin section at 16-19cm is a talc-rich sheared rock with some possible dolerite clasts, no obvious chromite, and little tremolite. | It may be mainly sheared vein material. Semi-quant XRD: 16-19cm - tlc (95), chl (5) | 100 | Minerals: Chlorite; Clay minerals; Talc | ||||||||||
| 357-M0075B-2R-1,41 | 3 | 2.688 | Rubble | Dolerite rubble | Rounded pebbles (about 7cm each) of meta-dolerites (not foliated). | 90 | ||||||||||||
| 357-M0075B-2R-1,61 | 4 | 2.888 | Metamorphic/Fault Rock | Metadolerite | Metadolerite. Semi-quant XRD: 66-68cm - tlc (56), pl (15), qtz (13), amph (11), cchrys (4), clay (1) | 100 | ||||||||||||
| 357-M0075B-2R-2,0 | 1 | 3.208 | Metamorphic/Fault Rock | Metadolerite | Pebbles of fine-grained meta-dolerite, possibly meta-basalt up to 5cm. Very similar to hole 75B 2R1 Unit 4. | Structures: Open fractures=0 -- No open fractures; Veins=0 -- No veins; Foliation=0 -- Massive | Veins: Shape=0 -- No veins | Fractures: Morphology=No open fractures | ||||||||||
| 357-M0075B-3R-1,0 | 1 | 3.982 | Rubble | Talc-amphibole schist rubble | Talc-amphibole-chlorite schist rubble. Loose pebble and unconsolidated matrix-supported breccia. Most of the pebbles are sigmoidal shaped and foliated. | 100 | Minerals: Amphibole; Chlorite; Other; Serpentine; Talc | |||||||||||
| 357-M0075B-3R-1,34 | 2 | 4.322 | Sediment | Polymict breccia | Unconsolidated, matrix-supported breccia. Matrix consists of a fine-grained assemblage of talc, amphibole and chlorite. The clasts are similar to the previous interval. Semi-quant XRD: 51-52cm - tlc (49), chl (48), chl-smec (2), chrys (2) | 100 | Minerals: Amphibole; Chlorite; Other; Talc | |||||||||||
| 357-M0075B-3R-1,74 | 3 | 4.722 | Metamorphic/Fault Rock | Talc-amphibole-chlorite schist | Chlorite-amphibole schist with meta-dolerite dikes. The schistose material consists of finely alternating yellow-green and dark grey green levels (Talc-bearing). Sometimes the dark grey layers form elongated lenses (from 110 to 116cm). The shear zone | contains both the shistose talc-amphibole foliated material with clasts (dark gray) that in some cases are angular. Milonitic fabric, apparent Semi-brittle foliation 090/30. Dikes: 102 -110cm, clast within tremolite shear zone, with sheared materials | at the contact, dolerite also at the bottom core from 126cm to the end. Thin section at 78-86cm is a talc-chlorite-tremolite schist, with many shear bands and doleritic material at the upper end of the section which is chloritized and sheared but but | is perhaps intrusive into the schist. Chlorite pull-apart veins are associated with this Thin section at 97-100cm (poor polish) is an intensely foliated talc schist, with boudinaged oxides and pull-aparts filled with chlorite. Crenulation cleavage is | developed. Some pieces may have chloritised plagioclase phenocrysts representing metadolerite clasts. Thin section at 100-102cm is a metadolerite dyke (or perhaps two dykes) that appears to be intruded across the fabric of a schistose fault rock that | includes amphibole, chlorite and epidote. Semi-quant XRD: 78-86cm - chl (51), amph (35), tlc (9), clay (1), ox (3) | 100 | 5G 6/2 | Minerals: Amphibole; Chlorite; Oxides; Talc | Total alteration | ||||
| 357-M0075B-3R-1,126 | 4 | 5.242 | Metamorphic/Fault Rock | Metadolerite | Meta-dolerite | 100 | 10YR 2.5/1 | Minerals: Clinopyroxene; Orthopyroxene; Oxides; Plagioclase | Slight alteration | |||||||||
| 357-M0075B-3R-2,0 | 1 | 5.272 | Rubble | Talc-amphibole schist rubble | Rubble in pale green clays. One bigger fragment is a well-foliated chlorite-amphibole schist. | Structures: Open fractures=2 -- 1-5 per 10cm; Veins=5 -- >20 per 10cm; Foliation=3 -- Strongly foliated | Veins: Shape=3 --Irregular; Connectivity=4 -- Network; Texture=1 -- Massive; Structure=1 -- Uniform; Structure=3 -- Composite | Fractures: Morphology=Irregular | Minerals: Amphibole; Chlorite; Other; Tremolite |