Citation:

odp.proc.sr.193.201.2007

Name: (Tables T1, T2) Major element content in alteration categories of ODP Site 193-1188 and Hole 193-1189A, PACMANUS field
Published: 2007
License: https://creativecommons.org/licenses/by/3.0/

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

Published: 2007 (exact date unknown) • DOI registered: 2012-05-08

RIS Citation BibTeX Citation Text Citation Copy Citation ShareShow Map Google Earth 19 4 1

Abstract:

In the Ocean Drilling Program's only foray to an active seafloor hydrothermal system hosted by felsic volcanic rocks at a convergent plate margin, deep penetrations were achieved at two contrasted sites within the PACMANUS field (Manus backarc basin, Papua New Guinea). Just 1.0 km apart, these sites are characterized, respectively, by diffuse low-temperature venting at the seabed (Site 1188, Snowcap site; 1650 meters below sea level [mbsl]) and focused high-temperature venting (Site 1189, Roman Ruins; 1700 mbsl). Shallow holes at a background location remote from known hydrothermal activity (Site 1190) and at a second high-temperature chimney field (Site 1191, Satanic Mills) failed to drill beyond unaltered felsic lavas which at Sites 1188 and 1189 form an impervious cap (as thick as 35 m) to an underlying, pervasively altered lava sequence with occasional volcaniclastic horizons.

To the maximum depth drilled (387 meters below seafloor [mbsf]), alteration assemblages are characterized by clay minerals and ubiquitous disseminated pyrite. Hydrothermal K-feldspar at Site 1189 differentiates it from Site 1188 where, by contrast, several intervals of pyrophyllite-bearing acid sulfate alteration suggest input from magmatic volatiles. At both deeply penetrated sites the dominant silica phase in alteration assemblages changes downhole from opal-A at the transition from overlying unaltered lava to cristobalite and then to quartz. The boundary between the cristobalite and quartz domains is gradational between 60 and 110 mbsf in Hole 1188A under Snowcap but is sharper and shallower (~25 mbsf) in Hole 1189A on the fringes of the Roman Ruins field. Hole 1189B, higher on the Roman Ruins mound, intersected a "Stockwork Zone" with abundant quartz ± pyrite ± anhydrite veins and breccia infills, from base of casing (31 mbsf) to ~110 mbsf, below which an abrupt change occurred to a "Lower Sequence" with interleaved cristobalite- and quartz-bearing assemblages and common preservation of igneous plagioclase. Only two thin intervals of sulfide-rich mineralization were encountered, both below the Roman Ruins chimney field.

Project(s):

Ocean Drilling Program (ODP)

Coverage:

Median Latitude: -3.725700 * Median Longitude: 151.671533 * South-bound Latitude: -3.728300 * West-bound Longitude: 151.669800 * North-bound Latitude: -3.720700 * East-bound Longitude: 151.674900

Date/Time Start: 2000-11-18T17:30:00 * Date/Time End: 2000-12-30T04:00:00

Minimum DEPTH, sediment/rock: 31.20 m * Maximum DEPTH, sediment/rock: 300.72 m

Event(s):

193-1188A * Latitude: -3.728300 * Longitude: 151.669900 * Date/Time Start: 2000-11-18T17:30:00 * Date/Time End: 2000-11-22T08:30:00 * Elevation: -1640.2 m * Penetration: 211.6 m * Recovery: 21.93 m * Location: Bismarck Sea * Campaign: * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 23 cores; 211.6 m cored; 0 m drilled; 10.4 % recovery

193-1188F * Latitude: -3.728100 * Longitude: 151.669800 * Date/Time Start: 2000-12-29T15:15:00 * Date/Time End: 2000-12-30T04:00:00 * Elevation: -1641.7 m * Penetration: 386.7 m * Recovery: 30.89 m * Location: Bismarck Sea * Campaign: * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 45 cores; 168.7 m cored; 218 m drilled; 18.3 % recovery

193-1189A * Latitude: -3.720700 * Longitude: 151.674900 * Date/Time Start: 2000-11-22T08:30:00 * Date/Time End: 2000-11-23T20:45:00 * Elevation: -1690.2 m * Penetration: 125.8 m * Recovery: 8.58 m * Location: Bismarck Sea * Campaign: * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 13 cores; 125.8 m cored; 0 m drilled; 6.8 % recovery

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Event label	Event
2	Sample code/label	Sample label		Binns, Raymond A	DSDP/ODP/IODP sample designation
3	Piece	Piece		Binns, Raymond A
4	DEPTH, sediment/rock	Depth sed	m			Geocode – mbsf
5	Sample ID	Sample ID		Binns, Raymond A		of Commonwealth Scientific and Industrial Research Organisation (CSIRO)
6	Description	Description		Binns, Raymond A
7	Alteration	Alteration		Binns, Raymond A		category
8	Silicon dioxide	SiO2	%	Binns, Raymond A
9	Titanium dioxide	TiO2	%	Binns, Raymond A
10	Aluminium oxide	Al2O3	%	Binns, Raymond A
11	Iron oxide, FeO	FeO	%	Binns, Raymond A		FeO(t)
12	Manganese oxide	MnO	%	Binns, Raymond A
13	Magnesium oxide	MgO	%	Binns, Raymond A
14	Calcium oxide	CaO	%	Binns, Raymond A
15	Sodium oxide	Na2O	%	Binns, Raymond A
16	Potassium oxide	K2O	%	Binns, Raymond A
17	Phosphorus pentoxide	P2O5	%	Binns, Raymond A
18	Sulfur, total	TS	%	Binns, Raymond A
19	Loss on ignition	LOI	%	Binns, Raymond A		includes loss on drying (105°C)
20	Elements, total	Total	%	Binns, Raymond A		uncorrected for oxygen in sulfides allocated to FeO(t) or not allocated to TS for sulfates
21	Zirconium/Titanium ratio	Zr/Ti		Binns, Raymond A		Zr in mg/kg and Ti in wt % TiO2

License:

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

Size:

133 data points

Data

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

1 Event	2 Sample label	3 Piece	4 Depth sed [m]	5 Sample ID	6 Description	7 Alteration	8 SiO2 [%]	9 TiO2 [%]	10 Al2O3 [%]	11 FeO [%]	12 MnO [%]	13 MgO [%]	14 CaO [%]	15 Na2O [%]	16 K2O [%]	17 P2O5 [%]	18 TS [%]	19 LOI [%]	20 Total [%]	21 Zr/Ti
193-1188A	193-1188A-9R-3,22-26	2	70.73	142654a	White, bleached rock with pyrophyllite	Cristobalite-bearing altered rocks; pyrophyllite-bearing bleached rocks	63.2	0.56	13.7	1.11	0.01	0.24	5.7	0.64	0.34	0.12	4.4	10.5	100.5	192
193-1188A	193-1188A-9R-3,22-26	2	70.73	142654b	Greenish gray kernel	Cristobalite-bearing altered rocks; kernels in samples with fracture-controlled pale selvages	61.2	0.54	12.8	4.60	0.02	0.55	2.9	0.77	2.29	0.14	5.6	8.5	99.9	205
193-1188F	193-1188F-15Z-1,139-146	16	251.79	142676	Mottled rock with pyrophyllite	Quartz-bearing altered rocks; pyrophyllite-bearing bleached rocks	57.5	0.75	14.0	6.30	0.01	0.17	3.6	0.44	0.65	0.22	8.0	10.7	102.4	130
193-1188F	193-1188F-26Z-1,62-64	4	300.72	142684a	Kernel	Quartz-bearing altered rocks; kernels in samples with fracture-controlled pale selvages	62.2	0.80	13.8	4.60	0.05	5.90	1.2	0.43	1.80	0.30	2.0	6.7	99.8	115
193-1188F	193-1188F-26Z-1,62-64	4	300.72	142684b	Transition zone	Quartz-bearing altered rocks; transition zones between kernels and selvages	60.7	0.78	13.8	5.00	0.02	3.30	2.1	0.43	2.40	0.35	4.1	7.7	100.6	118
193-1188F	193-1188F-26Z-1,62-64	4	300.72	142684d	Pale selvage	Quartz-bearing altered rocks; pale selvages	55.9	0.77	13.7	0.67	0.01	0.35	8.5	0.53	2.50	0.22	5.2	10.0	98.3	108
193-1189A	193-1189A-1R-1,10-14	2	31.20	142806	Pale gray altered perlite from Stockwork Zone	Altered rocks lacking silica phases, generally occurring as fragments in hydrothermal breccias or between stockwork quartz veins	36.0	1.06	20.8	13.60	0.00	4.20	0.4	0.80	5.00	0.30	11.0	14.0	107.0	145