MTJ, PAPATUA

Name Alias(es):

Mangatolu Triple Junction

Kings Triple Junction

MGDS_FeatureID lowest in hierarchy:

Lau

Activity:

active, inferred

Latitude:

-15.3850

Longitude:

-174.6430

Location on map:

Ocean:

S. Pacific

Region:

Lau Basin

National Jurisdiction:

Tonga

Maximum or Single Reported Depth (mbsl):

2170

Minimum Depth (mbsl):

2000

Tectonic setting:

back-arc spreading center

Full Spreading Rate (mm/a):

106.4

Volcano Number (if applicable):

Host Rock:

BABB, MORB, low-K andesite

Deposit Type:

PMS, polymetallic massive sulfides

Notes on Vent Field Description:

(from 2006 InterRidge vents database): "widespread vent fields with local active sulfide deposits, and numerous low-temperature Fe oxide and silica chimneys"; Merle et al. (2008): tow MTJ, T08C06; Baker et al. 2019: sites 9, 10 & 11 near the intersection of tows T08C05 and T08C06 with spreading rates ranging from 35 to 37 mm/year in Table 1;

Year and How Discovered (if active, visual confirmation is listed first):

1986 PAPATUA Expedition deposits only; 2008 plume only

Discovery References (text):

Hawkins, J. (1986) "Black smoker" vent chimneys. Eos, Trans. AGU, 67(17): 430, accessed 5 May 2015: http://onlinelibrary.wiley.com/doi/10.1029/EO067i017p00430-02/pdf;

[Lisitsyn et al., International Geology Review, 34, 828-847, 1992, HYDROTHERMAL FORMATIONS IN THE NORTHERN PART OF THE LAU BASIN, PACIFIC OCEAN.];

Other References (text):

Merle, S., et al. (2008) Northeast Lau Basin, R/V Thompson Expedition TN227, November 13-28, 2008, Apia to Apia, Western Samoa. Cruise report. Accessed 8 May 2015, http://www.pmel.noaa.gov/eoi/laubasin/documents/tn227-nelau-report-final.pdf.;

Baker ET, Walker SL, Massoth GJ and Resing JA (2019) The NE Lau Basin: Widespread and Abundant Hydrothermal Venting in the Back-Arc Region Behind a Superfast Subduction Zone. Front. Mar. Sci. 6:382. doi: 10.3389/fmars.2019.00382;

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