Citation:

odp.proc.sr.183.013.2003

Name: (Table T4) Petrographic description of basalts and secondary minerals of altered volcanic rocks from ODP Hole 183-1137A
Published: 2003
License: https://creativecommons.org/licenses/by/3.0/

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Project(s):

Ocean Drilling Program (ODP)

Coverage:

Latitude: -56.833050 * Longitude: 68.093450

Date/Time Start: 1998-12-31T21:00:00 * Date/Time End: 1999-01-06T16:40:00

Minimum Elevation: -1004.5 m * Maximum Elevation: -1004.5 m

Event(s):

183-1137A * Latitude: -56.833050 * Longitude: 68.093450 * Date/Time Start: 1998-12-31T21:00:00 * Date/Time End: 1999-01-06T16:40:00 * Elevation: -1004.5 m * Penetration: 371.2 m * Recovery: 219.38 m * Location: Indian Ocean * Campaign: * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 46 cores; 371.2 m cored; 0 m drilled; 59.1 % recovery

Parameter(s):

#	Name	Short Name	Principal Investigator	Method/Device	Comment
1	Sample code/label	Sample label	Kurnosov, Victor B	DSDP/ODP/IODP sample designation
2	Description	Description	Kurnosov, Victor B	Thin section analysis/measurements
3	Comment 2 (continued)	Comm 2	Kurnosov, Victor B	Thin section analysis/measurements
4	Comment 3 (continued)	Comm 3	Kurnosov, Victor B	Thin section analysis/measurements
5	Alteration	Alteration	Kurnosov, Victor B	Thin section analysis/measurements	smec = smectite, chl = chlorite, zeol = zeolite, PhX = phenocryst
6	Alteration	Alteration	Kurnosov, Victor B	Thin section analysis/measurements	..continued; smec = smectite, chl = chlorite, zeol = zeolite, PhX = phenocryst
7	Minerals	Minerals	Kurnosov, Victor B	X-ray diffraction (XRD)

License:

Creative Commons Attribution 3.0 Unported (CC-BY-3.0)

Size:

70 data points

Data

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1 Sample label (DSDP/ODP/IODP sample designation)	2 Description (Thin section analysis/measure...)	3 Comm 2 (Thin section analysis/measure...)	4 Comm 3 (Thin section analysis/measure...)	5 Alteration (smec = smectite, chl = chlori...)	6 Alteration (..continued; smec = smectite,...)	7 Minerals (X-ray diffraction (XRD))
183-1137A-25R-4,100-115	Aphyric basalt, vesicular (20%-25%; 0.1-0.5 mm), incompletely crystallized. Groundmass with microdoleritic texture.	Phenocrysts of long lathe of plagioclase (andesine; 0.1-0.3 mm). Dark brown volcanic glass with opaque dust and clinopyroxene.		Moderate (30%-35%); vesicles completely or partly infilled by clay minerals, zeols, and carbonate. Oxidation of basalt is ~30%.
183-1137A-27R-1,100-105	Sparsely plagioclase microphyric basalt, vesicular (5%-10%; up to 2-4 mm), incompletely crystallized.	Groundmass of vitrophyric-microlitic texture. Phenocrysts of crystals of plagioclase (<1%; 0.5-0.6 mm).		~25%-30%; clinopyroxene completely replaced by chl; plagiocl is partly replaced with chl; vesicles infilled zonally ...	... (from walls to center of vesicles) with smec, zeol, and trace of chl, carbonate is located in center. Oxidation of basalt is low (~5%).	Smectite
183-1137A-29R-1,38-43	Sparsely olivine-plagioclase microphyric basalt, weakly vesicular (1%; 0.1-0.3 mm), incompletely crystallized.	Groundmass intergranular partly microdoleritic texture. Microphenocrysts of single tabular crystals of plagiocl (andesine; to 0.2-0.4 mm) and olivine.	Groundmass of plagioclase lathe (50%), isometric clinopyroxene crystals (30%-35%), opaque minerals, and interstitial glass (5%-10%).	~20%; olivine and interstitial glass completely replaced by smec and chl; vesicles infilled with smec and chl. Oxidation of basalt is low (~5%).		Smectite
183-1137A-29R-3,5-9	Olivine-clinopyroxene-plagioclase phyric basalt, vesicular (10%-15%; 1-2 to 5 mm), incompletely crystallized.	Groundmass with vitrophyric-microlitic texture. Phenocrysts (5-10%) of olivine (0.2-0.7 mm), clinopyroxene (0.2-1 mm) and plagiocl (up to 1.3-1.5 mm).	Groundmass of plagioclase lathe (50%), clinopyroxene, and dark brown interstitial glass.	~15%-20%; olivine and interstitial glass completely replaced by smec and chl;	vesicles infilled with smec and chl, with admixture of zeols and carbonate. Oxidation of basalt is low (~5%).
183-1137A-32R-3,71-76	Clinopyroxene-plagioclase glomerophyric basalt, massive.	Phenocrysts of clinopyroxene (0.2-0.5 mm) and plagioclase (labradorite and andesine) (to 0.3-1.2 mm).	Groundmass of plagioclase lathe (45%-50%), clinopyroxene (30%-35%), opaque minerals (5%), and interstitial glass (10%).	10%-15%; olivine replaced by smec, chl, and oxidized Fe, interstitial glass replaced by smec and chl. Oxidation of basalt is low (~2%).		Smectite and defective chlorite in trace amounts
183-1137A-32R-7,46-50	The sample is similar to Sample 183-1137A-32R-3, 71-76 cm.			10%-15%; olivine completely replaced by smec, chl, and oxidized Fe, interstitial glass replaced by smec and chl. Oxidation of basalt is low (~2%).		Smectite
183-1137A-34R-3,18-23	Contact of tuff and basalt: 1. Sparsely plagioclase microphyric basalt, weakly vesicular (single vesicles), incompletely crystallized.	Groundmass demonstrates microlitic texture. Microphenocrysts of plagioclase (<5%; to 0.1-0.55 mm).	Groundmass represented by glass and long lathe of plagioclase.	~30%; microphenocrysts replaced completely by opaque minerals and traces of chl; interstitial glass replaced by chl and smec and opaque minerals.	Groundmass plagioclase replaced by albite; single vesicles infilled with opaque minerals and chl. Oxidation of basalt is moderate (~10%).	Smectite and hydromica, chlorite, and swelling chlorite in trace amounts
183-1137A-34R-3,18-23	Contact of tuff and basalt: 2. Crystal-lithoclastic tuff, vesicular.			Moderate (~30%). Oxidation of basalt is moderate (~10%).		Smectite and hydromica and quartz in trace amounts
183-1137A-37R-5,73-79	Sparsely plagioclase microphyric basalt, highly vesicular (~50%; 1-5 mm), incompletely crystallized, with microlitic texture in groundmass.	Microphenocrysts of plagioclase (<5%) represented by tabular crystals (0.1-0.3 mm).	Groundmass represented by interstitial glass and long plagioclase lathe.	~60%; vesicles infilled (wall to center) with br-yellow chl, br-green chl with zeols (natrolite, tomsonite), green clay minerals with traces of zeols;	microPhX of plagiocl partly replaced by albite and chl; interst. glass replaced by opaques and chl. Oxidation of basalt strong (total ~40% of rock).
183-1137A-39R-2,114-119	Aphyric basalt, incompletely crystallized, brecciated rock, with microlitic, partly hyaline, texture of groundmass.			~35%; secondary minerals represented by chl, smec, and zeols. Oxidation of basalt is low (total ~3-5% of rock).
183-1137A-39R-3,6-14	Sparsely plagioclase microphyric basalt, weakly vesicular, incompletely crystallized, with microlitic texture.	Microphenocrysts of plagioclase (<5%) represented by tabular crystals (0.2-1.2 mm).	Groundmass of plagioclase lathe, microlathe of clinopyroxene, opaque minerals, and interstitial glass.	Moderate (~30%); interstitial glass replaced by chl and smec; single vesicles infilled (from wall to center) with chl and smec.	Oxidation of basalt is low (total ~2% of rock).	Smectite
183-1137A-43R-2,84-92	Dacitic tuff. Matrix contains baked ashes.			Very high (80%); secondary minerals represented by chl and carbonate. Oxidation of basalt is moderate (total ~10%-15% of rock).		Smectite and quartz in trace amounts with 10% of mica layers
183-1137A-45R-1,121-126	Plagioclase phyric basalt, vesicular (10%-15%), incompletely crystallized, with microlitic, partly intersertal, texture.	Microphenocrysts of plagioclase (10%) are represented by tabular crystals.	Groundmass of plagioclase, clinopyroxene, and interstitial glass.	~40%; olivine replaced by chl, plagiocl replaced by K-feldspar (adularia?), smec, chl and carbonate; interst. glass repl. by chl, smec, oxidized Fe;	single vesicles infilled with chl, smec, zeols, and carbonate. Oxidation of basalt is moderate (total ~10%-15% of rock).	Smectite and swelling chlorite and hydromica in trace amounts