Citation:

odp.proc.sr.183.013.2003

Name: (Table T5) Petrographic description of basalts and secondary minerals of altered volcanic rocks from ODP Hole 183-1138A
Published: 2003
License: https://creativecommons.org/licenses/by/3.0/

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Project(s):

Ocean Drilling Program (ODP)

Coverage:

Latitude: -53.551750 * Longitude: 75.974880

Date/Time Start: 1999-01-07T23:30:00 * Date/Time End: 1999-01-31T06:15:00

Minimum Elevation: -1141.4 m * Maximum Elevation: -1141.4 m

Event(s):

183-1138A * Latitude: -53.551750 * Longitude: 75.974880 * Date/Time Start: 1999-01-07T23:30:00 * Date/Time End: 1999-01-31T06:15:00 * Elevation: -1141.4 m * Penetration: 842.7 m * Recovery: 411.98 m * Location: Indian Ocean * Campaign: * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 89 cores; 842.7 m cored; 0 m drilled; 48.9 % 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:

77 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))
183-1138A-78R-1,60-64	Crystal-lithoclastic tuff.			High (50%-60%); secondary minerals represented by chlorite. Oxidation of basalt is moderate (total ~20% of rock).		Smectite, clinoptilolite, and heulandite
183-1138A-80R-4,35-40	Aphyric basalt, vesicular (20%-25%; 0.4-3.5 mm), incompletely crystallized, with microdoleritic texture.	Rock represented by plagioclase lathe (labradorite-oligoclase) with size 0.1-0.3 mm (40%-45%),	small crystals of clinopyroxene (40%-45%), opaque minerals, and glass (5%-10%).	15%-20%; interstitial glass replaced by chl; vesicles infilled with chl. Oxidation of basalt is very low (total ~1% of rock).		Smectite
183-1138A-81R-1,34-39	Aphyric basalt, vesicular (10%-15%), incompletely crystallized, with intersertal texture.	Rock is represented by plagioclase lathe (40%-45%), clinopyroxene (30%-35%), opaque minerals (5%), and glass (10%).		15%-20%; vesicles infilled with smec and chl with admixture of zeol in central part of vesicles;	veins represented by smec, chl, and zeol. Rock is nonoxidized.
183-1138A-81R-2,51-57	Plagioclase microphyric basalt, weakly vesicular (2%-3%; 0.3-1 mm), incompletely crystallized, with intersertal texture.	Microphenocrysts (5%) are tabular plagioclase (labradorite-andesine) (0.2-1.2 mm), single crystals of clinopyroxene (0.2-0.3 mm), and olivine(?).	Groundmass is plagioclase (40%-45%), clinopyroxene (30%-35%), opaque minerals (5%), and interstitial glass.	~20%; olivine completely replaced by chl; interstitial glass completely replaced by smec and chl;	vesicles infilled with smec and chl. Oxidation of basalt is low (~5%).
183-1138A-82R-2,76-81	Aphyric basalt, vesicular (10%-15%; up to 10 mm), incompletely crystallized, with microlitic texture.	Rock consists of small plagioclase lathe to 0.1 mm, cryptocrystalline clinopyroxene, and glass with opaque minerals.		~20%; vesicles infilled with brown and green chl and small crystals of zeols (natrolite and tomsonite).	Oxidation of rock is very low (total ~1%).
183-1138A-82R-5,19-23	Aphyric basalt, weakly vesicular, incompletely crystallized, with intersertal texture.	Rock consists of small plagioclase lathe (40-45%; 0.1- to 0.2 mm), isometric crystals of clinopyroxene, opaques (5%), and interstitial glass (10%).		~20%-25%; single vesicles zonally infilled (from wall to center) with chl, smec, and then chl. Oxidation of rock is very low.		Smectite
183-1138A-83R-4,19-24	Aphyric basalt, weakly vesicular, incompletely crystallized, with intersertal texture. Rock is same as Sample 183-1138A-82R-5, 19-23 cm.					Smectite
183-1138A-83R-5,106-109	Aphyric basalt, vesicular (20%; 0.2-4 mm), incompletely crystallized, with intersertal texture.	Rock is same as Sample 183-1138A-82R-5, 19-23 cm, but is more vesicular (20%; 0.2-4 mm).		~30%; vesicles infilled with chl, smec, and admixture chl. Oxidation of rock is very low.
183-1138A-84R-5,20-25	Sparsely plagioclase microphyric basalt, vesicular (5%-10%; 1.5-7 mm), almost completely crystallized, with intergranular texture.	Microphenocrysts (35%-40%), opaque minerals (5%), and interstitial glass (5%). Plagioclase (2%-3%) is represented by tabular crystals (0.2-0.7 mm).	Plagioclase is zonal. Groundmass of plagioclase lathe (40%-45%), isometric clinopyroxene.	~30%; central parts of zonal plagiocl replaced by mica-type mineral, sometimes with admixture of opaques; interstitial glass replaced by chl and smec	vesicles completely infilled with chl and smec, central parts infilled by zeols, sometimes with admixture of chl and opaques. Oxidation of basalt low.
183-1138A-86R-1,130-137	Aphyric basalt, weakly vesicular (2%-3%; 1-1.5 mm), incompletely crystallized, brecciated rock, with microlitic, partly hyaline, texture.	Rock consists of plagioclase lathe and brown interstitial glass with opaque minerals.		Moderate (~30%); vesicles infilled with chl and smec, and zeols. Oxidation of basalt is low (total ~1%-2% of rock).
183-1138A-86R-2,21-25	Aphyric basalt, weakly vesicular (30%-35%; 0.1-6 mm), incompletely crystallized, with microlitic, partly hyaline, texture.	Rock of long lathe of plagioclase (0.1-0.2 mm) and brown interstitial glass with opaque minerals.		Moderate to high (~ 40%); vesicles infilled (from wall to center) with chl and smec, and zeols, sometimes vesicles infilled by glass.	Oxidation of basalt is low (total ~1% of rock).
183-1138A-86R-3,72-74	Aphyric basalt, vesicular (up to 1.5 mm), incompletely crystallized, with intersertal texture.	Rock of long lathe of plagioclase, small crystals of clinopyroxene, opaque minerals, and fresh glass.		~10%; walls of vesicles encrusted with chl and smec. Rock is nonoxidized.
183-1138A-87R-1,4-9	Plagioclase glomerophyric basalt incompletely crystallized, with microlitictexture.	Phenocrysts (5%) of plagioclase (labradorite-oligoclase; to 0.2-0.6 mm and 0.4-2 mm).	Groundmass represented by plagioclase, brown interstitial glass, and opaque minerals. Vesicles (~5%).	Low (~10%); phenocrysts of plagioclase partly replaced by chl; vesicles infilled with light green chl. Rock is nonoxidized.
183-1138A-87R-2,76-81	Aphyric basalt, weakly vesicular (<1%; up to 2 mm), incompletely crystallized, with interstitial, partly trachytic, texture.	Rock consists of lathe of plagiocl (oligocl, labradorite-oligoclase), prismatic crystals of clinopyroxene, and brown interstitial glass with opaques.		~20%; interstitial glass partly replaced by chl and smec; vesicles partly or completely infilled with brown-green chl and smec.	Oxidation of basalt is low (total ~5%-7% of rock).
183-1138A-88R-2,47-53	Aphyric basalt, vesicular (20%-25%; 0.3-7 mm), incompletely crystallized, with vitrophyric-microlitic texture.	Rock consists of lathe of plagioclase and brown interstitial glass with opaque minerals.		High (~50%); walls of vesicles encrusted by green-brown chl and smec, then to center vesicles infilled by zeols (natrolite and tomsonite).	Oxidation of basalt is low (total ~3%-5% of rock).
183-1138A-88R-2,91-96	Aphyric basalt, vesicular (5%; 0.3-3 mm), incompletely crystallized, with intersertal texture.	Rock of lathe of plagioclase, long and isometric crystals of clinopyroxene, and brown interstitial glass.		Moderate (~20%-25%); interstitial glass replaced by chl and smec; vesicles infilled by chl and smec.	Oxidation of basalt is very low (total ~1% of rock).