Citation:

dsdp.proc.77.112.1984

Name: (Appendix) Total organic carbon, pyrolysis characteristics, and organic matter types at DSDP Holes 77-535 and 77-540
Published: 1984
License: https://creativecommons.org/licenses/by/3.0/

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Abstract:

Lower to middle Cretaceous sediments in the eastern Gulf of Mexico are richer in organic matter and have a more marine organic facies than their counterparts in the nearby western North Atlantic, suggesting that the Gulf was the more productive of the two areas. As in the western North Atlantic, the rate of supply of terrestrial organic matter was high when the rate of supply of noncarbonate clastic materials was high (at times of low sea level) and diminished as sea level rose. The rate of supply of marine organic matter was lower in the Early Cretaceous than in the Cenomanian, perhaps in response to the global rise in sea level over this period. Where they are thermally mature, the organic matterrich units drilled at Sites 535 and 540 should be excellent sources for liquid hydrocarbons. The Pleistocene sediments of the eastern Gulf are dominated by terrestrial organic matter representing Mississippi River effluent.

Project(s):

Deep Sea Drilling Project (DSDP)

Coverage:

Median Latitude: 23.768400 * Median Longitude: -84.443500 * South-bound Latitude: 23.708000 * West-bound Longitude: -84.516200 * North-bound Latitude: 23.828800 * East-bound Longitude: -84.370800

Date/Time Start: 1980-12-29T00:00:00 * Date/Time End: 1981-01-19T00:00:00

Minimum DEPTH, sediment/rock: 2.7 m * Maximum DEPTH, sediment/rock: 730.7 m

Event(s):

77-535 * Latitude: 23.708000 * Longitude: -84.516200 * Date/Time: 1980-12-29T00:00:00 * Elevation: -3450.0 m * Penetration: 714 m * Recovery: 504.6 m * Location: Gulf of Mexico/BASIN * Campaign: * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 78 cores; 704.5 m cored; 9.5 m drilled; 71.6 % recovery

77-540 * Latitude: 23.828800 * Longitude: -84.370800 * Date/Time: 1981-01-19T00:00:00 * Elevation: -2926.0 m * Penetration: 745.5 m * Recovery: 335.1 m * Location: Gulf of Mexico * Campaign: * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 79 cores; 745.5 m cored; 0 m drilled; 44.9 % recovery

Comment:

Sediment depth is given in mbsf. Organic matter types by Th. C. Masran (in percent of kerogen fraction) using organic matter classification scheme of Masran and Pocock (1981).

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Event label	Event
2	Sample code/label	Sample label		Summerhayes, Colin P	DSDP/ODP/IODP sample designation
3	Lithologic unit/sequence	Unit		Summerhayes, Colin P
4	DEPTH, sediment/rock	Depth sed	m			Geocode
5	Epoch	Epoch		Summerhayes, Colin P
6	Lithology/composition/facies	Lithology		Summerhayes, Colin P
7	Carbon, organic, total	TOC	%	Summerhayes, Colin P	Element analyser CHN, LECO
8	Organic matter, terrigenous	OM terr	%	Summerhayes, Colin P	Light microscope	Structured
9	Pollen and spores	Pollen+spores	%	Summerhayes, Colin P	Light microscope
10	Charcoal	Charcoal	%	Summerhayes, Colin P	Light microscope
11	Organic matter, terrigenous	OM terr	%	Summerhayes, Colin P	Light microscope	Biodegraded
12	Organic matter, amorphous	AOM	%	Summerhayes, Colin P	Light microscope	# = marine structural remnants
13	Organic matter, amorphous	AOM	%	Summerhayes, Colin P	Light microscope	Gray
14	Organic matter, aquatic	OM aquatic	%	Summerhayes, Colin P	Light microscope	Structured marine
15	Organic matter, amorphous	AOM	%	Summerhayes, Colin P	Light microscope	Round bodies (probably algal)
16	Hydrogen index, mass HC, per unit mass total organic carbon	HI, HC/TOC	mg/g	Summerhayes, Colin P	Rock eval pyrolysis (Espitalié et al. 1977)
17	Oxygen index, mass CO2, per unit mass total organic carbon	OI, CO2/TOC	mg/g	Summerhayes, Colin P	Rock eval pyrolysis (Espitalié et al. 1977)	High oxygen indices probably result from some decomposition of carbonate minerals and/or extensive oxidation of organic matter

License:

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

Size:

465 data points

Data

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

1 Event	2 Sample label (DSDP/ODP/IODP sample designation)	3 Unit	4 Depth sed [m]	5 Epoch	6 Lithology	7 TOC [%] (Element analyser CHN, LECO)	8 OM terr [%] (Structured, Light microscope)	9 Pollen+spores [%] (Light microscope)	10 Charcoal [%] (Light microscope)	11 OM terr [%] (Biodegraded, Light microscope)	12 AOM [%] (# = marine structural remnant...)	13 AOM [%] (Gray, Light microscope)	14 OM aquatic [%] (Structured marine, Light micr...)	15 AOM [%] (Round bodies (probably algal)...)	16 HI, HC/TOC [mg/g] (Rock eval pyrolysis (Espitali...)	17 OI, CO2/TOC [mg/g] (High oxygen indices probably ...)
77-535	77-535-2-2,114-124	I	5.0	Pleistocene	Mud	1.15	40	5	25	10	15	5	0	0	76	556
77-535	77-535-8-6,120-130	I	68.7	Pleistocene	Clay	1.01	35	10	20	10	15	5	5	0	87	544
77-535	77-535-15-4,120-135	I	131.7	Pleistocene	Clay	0.89	25	10	20	0	30	10	5	0	98	615
77-535	77-535-20-6,139-150	II	182.5	Cenomanian	Limestone	0.40	0	0	10	0	10	5	65	10	172	607
77-535	77-535-23-5,137-150	II	209.4	Cenomanian	Limestone	0.45	0	0	0	0	0	0	0	0	240	466
77-535	77-535-27-2,129-137	II	242.8	Cenomanian	Limestone	0.38	0	0	5	0	10	10	65	10	142	747
77-535	77-535-31-5,135-150	II	285.4	Cenomanian	Marly limestone	0.41	0	0	0	0	0	0	0	0	229	451
77-535	77-535-35-4,135-140	II	321.9	Cenomanian	Limestone	0.32	0	0	5	0	25	60	5	5	296	328
77-535	77-535-38-3,134-150	II	349.0	Cenomanian	Limestone	0.23	0	0	0	0	0	0	0	0	47	865
77-535	77-535-41-6,120-133	II	381.7	Cenomanian	Laminated limestone	1.15	0	0	5	0	40	45	5	5	372	318
77-535	77-535-48-3,141-150	III	441.4	earlt Aptian - late Hauterivian	Laminated limestone	0.50	0	0	5	0	45	35	5	10	362	292
77-535	77-535-52-3,125-136	IV	477.2	late Hauterivian - early Valanginian	Laminated limestone	2.87	5	0	5	0	#70	5	5	10	617	134
77-535	77-535-54-4,120-131	IV	492.7	late Hauterivian - early Valanginian	Laminated marly limestone	1.01	5	0	5	0	#70	5	5	10	579	273
77-535	77-535-57-5,138-150	IV	522.9	late Hauterivian - early Valanginian	Laminated marly limestone	0.27	5	0	10	0	45	30	5	5	355	333
77-535	77-535-60-5,120-129	IV	550.2	late Hauterivian - early Valanginian	Marly limestone	0.93	15	5	10	0	40	10	15	5	451	256
77-535	77-535-63-4,130-137	IV	575.8	late Hauterivian - early Valanginian	Marly limestone	0.22	10	0	15	0	45	15	10	5	213	309
77-535	77-535-66-5,137-150	IV	604.4	late Hauterivian - early Valanginian	Laminated marly limestone	1.06	5	0	10	0	55	20	5	5	749	392
77-535	77-535-69-4,120-135	V	625.2	early Valanginian - late Berriasian	Limestone	0.17	10	0	20	0	30	15	20	5	223	464
77-535	77-535-72-3,120-124	V	650.7	early Valanginian - late Berriasian	Limestone	0.18	20	0	10	0	30	10	25	5	205	266
77-540	77-540-1-2,120-135	I	2.7	Pleistocene	Nannomarl	0.21	10	0	15	0	20	40	15	0	90	2619
77-540	77-540-4-4,133-150	II	29.3	late Miocene	Nannochalk	0.19	10	0	15	0	20	40	15	0	121	1950
77-540	77-540-7-4,120-133	II	57.7	late Oligocene	Nannochalk	0.07	0	0	0	0	0	0	0	0	85	3971
77-540	77-540-10-3,120-135	II	84.7	late Oligocene	Nannochalk	0.07	0	0	0	0	0	0	0	0	157	5014
77-540	77-540-13-5,135-150	II	116.4	late Oligocene	Nannochalk	0.07	0	0	0	0	0	0	0	0	114	3428
77-540	77-540-16-5,135-150	II	144.9	late Oligocene	Nannochalk	0.06	0	0	0	0	0	0	0	0	583	4733
77-540	77-540-19-4,135-150	II	171.9	late Oligocene	Nannochalk	0.06	0	0	0	0	0	0	0	0	233	2400
77-540	77-540-23-3,134-150	II	208.3	early Eocene	Nannochalk	0.07	0	0	0	0	0	0	0	0	71	2528
77-540	77-540-26-3,120-133	II	236.7	late Eocene	Nannochalk	0.05	0	0	0	0	0	0	0	0	140	3080
77-540	77-540-70-3,135-150	V	654.9	late Albian	Dark gray laminated marly limestone	0.20	35	0	20	0	10	10	25	0	60	1830
77-540	77-540-73-2,120-122	V	681.7	middle Albian	Dark gray laminated marly limestone	0.17	10	0	15	0	20	15	35	5	94	1376
77-540	77-540-78-3.120-132	VI	730.7	middle Albian	Banded limestone	0.14	0	0	0	0	0	0	0	0	85	1142