Citation:

dsdp.proc.64.154.1982

Name: (Table 1) Mineral zones in sediments at DSDP Hole 64-477
Creator: Miriam Kastner
Published: 1982
License: https://creativecommons.org/licenses/by/3.0/

Always quote citation above when using data! You can download the citation in several formats below.

RIS Citation BibTeX Citation Text Citation Facebook TwitterShow Map Google Earth

Project(s):

Deep Sea Drilling Project (DSDP)

Coverage:

Latitude: 27.030800 * Longitude: -111.400300

Date/Time Start: 1978-12-18T00:00:00 * Date/Time End: 1978-12-18T00:00:00

Minimum DEPTH, sediment/rock: 16.0 m * Maximum DEPTH, sediment/rock: 226.0 m

Event(s):

64-477 * Latitude: 27.030800 * Longitude: -111.400300 * Date/Time: 1978-12-18T00:00:00 * Elevation: -2003.0 m * Penetration: 191 m * Recovery: 50.6 m * Location: North Pacific/Gulf of California/BASIN * Campaign: * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 21 cores; 172 m cored; 19 m drilled; 29.4 % recovery

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Comment
1	Depth, top/min	Depth top	m	Kastner, Miriam
2	Depth, bottom/max	Depth bot	m	Kastner, Miriam	Maximums are approximate
3	DEPTH, sediment/rock	Depth sed	m		Geocode – mbsf
4	Description	Description		Kastner, Miriam	#1
5	Description 2 (continued)	Description 2		Kastner, Miriam	#2
6	Description 2 (continued)	Description 2		Kastner, Miriam	#3
7	Description 2 (continued)	Description 2		Kastner, Miriam	#4
8	Description 2 (continued)	Description 2		Kastner, Miriam	#5

License:

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

Size:

36 data points

Data

Download dataset as tab-delimited text — use the following character encoding:

1 Depth top [m]	2 Depth bot [m] (Maximums are approximate)	3 Depth sed [m] (mbsf)	4 Description (#1)	5 Description 2 (#2)	6 Description 2 (#3)	7 Description 2 (#4)	8 Description 2 (#5)
0	32	16.0	A mixture of the detrital minerals quartz, plagioclase, some alkali feldspar and the clay minerals mixed-layer smectite/illite, illite,	and chlorite/kaolinite with the biogenic minerals opal-A and calcite and with very small amounts of the diagenetic minerals clinoptilolite (first detected at about 3 m depth) and pyrite.
32	58	45.0	Thermally altered zone at upper contact with sill complex. Detrital Plagioclase and quartz similar to zone above. Some newly formed quartz, most probably from opal-A, the abundance of which diminishes rapidly toward the sill.	By 6 to 8 meters above the sill no opal-A can be detected. No opal-CT observed. Only traces of detrital clay minerals; instead, newly formed, well-crystallized smectite increases in abundance toward the contact with the sill.	The abundance of clinptilolite diminishes toward the sill, and at about 50 meters depth analcime replaces clinoptilolite. Calcite is present in most samples but is absent below about 50 meters.	It coexists with some dolomite at about 50 meters; no dolomite below this depth. Some pyrite and gypsum are present, and possibly some goethite.
58	105	81.5	Sill complex (in Hole 477A, the sill complex was encountered between 33 and about 63 m depth).
105	120	112.5	Thermally altered zone at lower contact with sill complex. This zone is also affected by the deeper-seated, active hydrothermal system. Adjacent to the sill (between 105 and about 110m) only small amounts of detrital plagioclase	and no opal-A or opal-CT, but much quartza mixture of detrital and newly formed. The active hydrothermal system below the sill is most probably responsible for the newly formed euhedral K-feldspar	Only traces of detrital clay minerals; the main clay mineral is a well-crystallized smectite. No calcite but some protodolomite. Some pyrite, gypsum, and anhydrite. At about 115m some opal-A and only traces of hydrothermal K-feldspar	and smectite are present. Instead, much protodolomite has been formed. Some pyrite, gypsum, and anhydrite are still present. This subinterval (approximately 110-120 m sub-bottom) is a partially altered zone between the thermally altered zone	at the lower contact with the sill complex and the deep-seated active hydrothermal system. Clinoptilolite is absent throughout this depth interval.
120	267	193.5	Hydrothermally altered sediments. Opal-A is absent throughout this zone. There are four subzones:
120	160	140.0	A mixture of detrital and newly formed quartz, detrital and albitized Plagioclase, and a small amount of hydrothermal K-feldspar. Only small amounts of detrital clay minerals are still present and the first newly formed chlorite appears.	Calcite (but no dolomite), pyrite, gypsum, and anhydrite are present, also relatively large amounts of sphene and some epidote and possibly some natrolite.
160	175	167.5	Except for the absence of detrital clay minerals and hydrothermal K-feldspar, the mineral assemblage is similar to Subzone A. Amounts of recrystallized quartz and albitized Plagioclase increase.
175	185	180.0	Generally similar to Subzone B. The main differences are in the amount of chlorite, which has become an abundant phase, and in the formation of much pyrrhotite, which coexists with pyrite.
185	267	226.0	Greenschist facies rocks with the following mineral assemblage: quartz-albite-chlorite-epidote with pyrite and some pyrrhotite. There is general increase in the amount of epidote with depth.