Citation:

j.epsl.2017.09.037

Name: Heat flow measurements from the northern Gulf of California
Published: 2019-08-20
License: https://creativecommons.org/licenses/by/4.0/
Keywords: advective heat transport; continental rupture; distributed deformation; Gulf of California extensional province; narrow rift

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

Abstract:

A primary control on the geodynamics of rifting is the thermal regime. To better understand the geodynamics of rifting in the northern Gulf of California we systematically measured heat-flow across the Wagner Basin, a tectonically active basin that lies near the southern terminus of the Cerro Prieto fault. The heat flow profile is 40 km long, has a nominal measurement spacing of ∼1 km, and is collocated with a seismic reflection profile. Heat flow measurements were made with a 6.5-m violin-bow probe. Although heat flow data were collected in shallow water, where there are significant temporal variations in bottom water temperature, we use CTD data collected over many years to correct our measurements to yield accurate values of heat flow. After correction for bottom water temperature, the mean and standard deviation of heat flow across the western, central, and eastern parts of the basin are 220 ±60, 99 ±14, 889 ±419mWm−2, respectively. Corrections for sedimentation would increase measured heat flow across the central part of basin by 40 to 60%. We interpret the relatively high heat flow and large variability on the western and eastern flanks in terms of upward fluid flow at depth below the seafloor, whereas the lower and more consistent values across the central part of the basin are suggestive of conductive heat transfer. Moreover, heat flow across the central basin is consistent with gabbroic underplating at a depth of 15 km and suggests that continental rupture here has not gone to completion.

Keyword(s):

advective heat transport; continental rupture; distributed deformation; Gulf of California extensional province; narrow rift

Coverage:

Median Latitude: 30.988432 * Median Longitude: -114.167982 * South-bound Latitude: 30.923400 * West-bound Longitude: -114.311200 * North-bound Latitude: 31.091200 * East-bound Longitude: -113.940600

Date/Time Start: 2018-01-01T00:00:00 * Date/Time End: 2018-12-01T00:00:00

Minimum DEPTH, water: 57 m * Maximum DEPTH, water: 208 m

Event(s):

HF003P01 * Latitude: 31.056400 * Longitude: -114.016600 * Location: Gulf of California * Method/Device: (HF)

HF004P01 * Latitude: 31.053300 * Longitude: -114.023300 * Location: Gulf of California * Method/Device: (HF)

HF004P03 * Latitude: 31.045900 * Longitude: -114.042600 * Location: Gulf of California * Method/Device: (HF)

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Event label	Event		Neumann, Florian
2	DEPTH, water	Depth water	m	Neumann, Florian		Geocode
3	Bottom water temperature	BWT	°C	Neumann, Florian	CTD
4	Bottom water temperature	BWT	°C	Neumann, Florian	CTD	Long-term
5	Bottom water temperature, error	BWT e	±	Neumann, Florian	CTD	Long-term, 2 sigma
6	Temperature, difference	delta T	°C	Neumann, Florian	Calculated	Amplitude
7	Temperature, standard deviation	T std dev	±	Neumann, Florian	Calculated	Amplitude, 2 sigma
8	DATE/TIME	Date/Time		Neumann, Florian		Geocode – Month of year
9	Heat flow	HF	mW/m²	Neumann, Florian	Violin-bow probe (Multipenetration Heat Flow Probe)
10	Heat flow, standard deviation	HF std dev	±	Neumann, Florian	Violin-bow probe (Multipenetration Heat Flow Probe)

License:

Creative Commons Attribution 4.0 International (CC-BY-4.0)

Size:

196 data points

Data

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

1 Event	2 Depth water [m]	3 BWT [°C] (CTD)	4 BWT [°C] (Long-term, CTD)	5 BWT e [±] (Long-term, 2 sigma, CTD)	6 delta T [°C] (Amplitude, Calculated)	7 T std dev [±] (Amplitude, 2 sigma, Calculated)	8 Date/Time (Month of year)	9 HF [mW/m²] (Violin-bow probe (Multipenetr...)	10 HF std dev [±] (Violin-bow probe (Multipenetr...)
HF007P05	66	16.65	18.20	0.16	-1.01	0.20	12	326	56
HF007P04	76	16.27	17.84	0.14	-0.89	0.20	09	223	48
HF007P03	85	15.69	17.36	0.13	-0.98	0.19	10	201	44
HF007P02	92	15.45	16.91	0.12	-0.70	0.16	10	237	45
HF007P01	102	15.42	16.66	0.11	-0.64	0.15	09	151	34
HF006P08	113	15.34	16.12	0.10	-0.61	0.18	01	182	38
HF006P07	127	15.39	15.87	0.08	-0.60	0.16	01	123	29
HF006P06	138	15.29	15.57	0.07	-0.50	0.14	01	121	25
HF006P05	163	14.61	15.24	0.05	-0.37	0.13	12	106	20
HF006P04	190	14.52	15.01	0.05	0.24	0.11	01	97	16
HF006P03	197	14.46	14.92	0.05	0.21	0.10	01	87	16
HF006P02	202	14.44	14.81	0.05	0.19	0.11	01	86	14
HF006P01	206	14.45	14.79	0.06	0.18	0.09	01	83	16
HF005P12	208	14.45	14.73	0.06	0.17	0.10	01	86	15
HF005P11	208	14.43	14.65	0.05	0.12	0.10	01	94	14
HF005P10	207	14.42	14.63	0.07	0.06	0.09	01	99	18
HF005P09	200	14.50	14.75	0.06	0.18	0.10	01	93	18
HF005P08	202	14.63	14.78	0.06	0.18	0.09	01	111	19
HF005P07	200	14.66	14.46	0.15	-0.69	0.36	08	388	54
HF005P06	191	14.71	15.15	0.05	0.82	0.22	12	440	31
HF005P04	160	14.75	15.37	0.07	-0.52	0.17	12	1005	48
HF004P04	75	16.20	17.75	0.12	-1.26	0.21	01	774	46
HF010P03	75	17.00	17.62	0.12	0.88	0.30	11	1570	97
HF004P03	70	16.29	18.22	0.13	-0.94	0.23	12	1581	74
HF004P01	65	16.93	17.02	0.16	-1.36	0.35	10	981	57
HF003P01	67	16.96	17.78	0.05	1.09	0.21	01	637	30
HF008P010	62	17.40	17.41	0.06	-1.27	0.23	09	913	31
HF008P013	57	17.62	17.43	0.27	0.40	0.40	08	602	95