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Advances in Earth Science  2021, Vol. 36 Issue (7): 663-670    DOI: 10.11867/j.issn.1001-8166.2021.067
    
Advance and Trend of the Vent-Distal SEDEX Lead-Zinc Deposits
Huashan SUN(),Hui YANG
School of Earth Resources,China University of Geosciences (Wuhan),Wuhan 430074,China
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Abstract  

Vent-distal Sedimentary-Exhalative(SEDEX)ore deposits are the main source of lead-zinc minerals worldwide,however,their genesis and diagnostic marks are yet controversial. Recently,some important discoveries have been made in the study of typical vent-distal SEDEX ore deposits in the world, including: Submarine exhalative sedimentation is not the unique way of mineralization, and laminated mineralization is not an exclusive diagnostic signature of the genesis of such deposits; Contrary to the traditional view given that vent-distal SEDEX deposits are generally formed in a closed,reduced and down-warped submarine sedimentary environment,the host rocks of these deposits can be formed in an open and oxidized sedimentary environment; Methane anaerobic oxidation and submarine hydrothermal alteration may be the main mechanisms for the formation of laminated and layered mineralization of this type of deposits. These understandings not only challenge the traditional genetic model of SEDEX deposits but also lead to the change of traditional prospecting and exploration evaluation criteria. Therefore,it is one of the urgent tasks to strengthen metallogenic research of this type of deposits learnt from the existing research experiences.

Key words:  Vent-distal SEDEX deposit      Diagnostic signature      Sedimentary environment      Mineralized mechanism     
Received:  06 May 2021      Published:  20 August 2021
ZTFLH:  P618.4  
Fund: the National Natural Science Foundation of China "Metallogenic tectonic setting and key ore-controlling factor of the Xitieshan SEDEX Pb-Zn deposit in Qinghai Province, China"(41172087)
About author:  SUN Huashan (1969-), male, Chengde City, Hebei Province, Associate professor. Research areas include massive sulfide deposits. E-mail:sunhsh@cug.edu.cn
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Huashan SUN
Hui YANG

Cite this article: 

Huashan SUN,Hui YANG. Advance and Trend of the Vent-Distal SEDEX Lead-Zinc Deposits. Advances in Earth Science, 2021, 36(7): 663-670.

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http://www.adearth.ac.cn/EN/10.11867/j.issn.1001-8166.2021.067     OR     http://www.adearth.ac.cn/EN/Y2021/V36/I7/663

Fig. 1  Genetic model comparison of SEDEX Pb-Zn deposits7
(a)Vent-proximal genetic model; (b)Vent-distal genetic model; Both of (a) and (b) are controlled by submarine sedimentary exhalative and enclosed and reduced sedimentary environment; (c)Hydrothermal altered genetic model of SEDEX Pb-Zn deposits. Notably, mineralization is controlled by hydrothermal alteration within the diagenetic strata and formed in the open and oxidation environments
Fig. 2  Schematic figures for submarine sulphate-methane transition zone a and anaerobic oxidation of methane b29
(a)Sulphate reduced zone in the upper level, methane forming zone in the lower level, sulphate methane transition zone between them; (b)Thicked black arrows denote that SO42- infiltrates downward, whereas CH4 transfers upward, and anaerobic oxidation of methane occurs in the sulphate methane transition zone. In addition, in the upward stratigraphic sequences, it is the characteristics of depletion in δ13C while enrichment in δ34S
Fig. 3  Correlation diagrams between organic carbon contentδ34S of pyrites and δ13C of autogenetic carbonate minerals and strata sequence in the ore-hosted DLK formation of SEDEX Pb-Zn deposit in Selwyn basin Canada22
Fig. 4  Thermodynamic modeling diagrams illustrate how the pH value change which is caused by the alteration between hydrothermal fluids and rocks to effect on the precipitation sequence of sulfides from the hydrothermal fluids14
(a)Stable area of pyrite ranges from 3 to 9 in pH; (b)Higher pH value of 5~11 for sphalerite. Which gives a reasonable explanation for the formation of pyrite before sphalerite, and the latter is the result of alteration triggering pH value increasing
1 HANNINGTON M D, DE RONDE C E J, PETERSEN S. Sea-floor tectonics and submarine hydrothermal systems [J]. Economic Geology, 2005, 100: 111-141.
2 LEACH D L, SANGSTER D F, KELLEY K D, et al. Sediment-hosted lead-zinc deposits: a global perspective [J]. Economic Geology, 2005, 100: 561-607.
3 SANGSTER D F, HILLARY E M. SEDEX lead-zinc deposits: proposed sub-types and their characteristics [J]. Exploration and Mining Geology, 1998, 7: 341-357.
4 SATO T. The behaviours of ore-forming solutions in seawater [J]. Mining Geology, 1972, 22: 31-42.
5 GOODFELLOW W D, LYDON J W, TURNER R J W. Geology and genesis of stratiform sediment-hosted (SEDEX) zinc-lead-silver sulphide deposits: mineral deposit modeling [J]. Geological Association of Canada Special Paper, 1993, 40: 201-251.
6 LYDON J W. Genetic models for Sullivan and other SEDEX deposits [C]//MIHIR Deb, GOODFELLOW W D. Sediment-hosted lead-zinc sulphide deposits, attributes and models of some major deposits in India, Australia and Canada. New Delhi, India: Narosa Publishing House, 2004: 149-190.
7 MAGNALL J M, GLEESON S A, CREASER R A, et al. The mineralogical evolution of the clastic dominant-type Zn-Pb±Ba deposits at Macmillan Pass (Yukon, Canada)—tracing subseafloor barite replacement in the layered mineralization [J]. Economic Geology, 2020, 115: 961-979.
8 LARGE R, BULL S W, COOKE D R, et al. A genetic model for the HYC deposit, Australia: based on regional sedimentology, geochemistry, and sulfide-sediment relationships [J]. Economic Geology, 1998, 93:1 345-1 368.
9 GU Lianxing. Advances in research on massive sulfide deposits: a review [J]. Geological Review, 1999, 45(3): 265-275.
9 顾连兴. 块状硫化物矿床研究进展评述[J]. 地质论评, 1999, 45(3): 265-275.
10 HAN Fa, SUN Haitian. Metallogenic system of SEDEX type deposits [J]. Earth Science Frontiers, 1999, 6(1): 139-162.
10 韩发, 孙海田. SEDEX 型矿床成矿系统[J]. 地学前缘, 1999, 6(1): 139-162.
11 LIU Jiajun, ZHENG Minghua, LIU Jianming, et al. The geological features and prospecting marks of the exhalative type of stratabound gold deposits in western Qinling [J]. Gold, 1997, 18(9): 9-12.
11 刘家军,郑明华,刘建明,等. 西秦岭喷流型层控金矿床的地质特征及其找矿标志[J]. 黄金, 1997, 18(9): 9-12.
12 SANGSTER D F. The role of dense brines in the formation of ventdistal Sedimentary-Exhalative (SEDEX) lead-zinc deposits: field and laboratory evidence[J]. Mineral Deposita, 2002, 37: 149-157.
13 IRELAND T, LARGE R R, MCGOLDRICK P, et al. Spatial distribution patterns of sulfur isotopes, nodular carbonates, and ore textures in the McArthur River (HYC) Zn-Pb-Ag deposit, northern Territory, Australia [J]. Economic Geology, 2004, 99: 1 687-1 709.
14 SPINKS S C, PEARCE M A, LIU W H, et al. Carbonate replacement as the principal ore formation process in the Proterozoic McArthur River (HYC) sediment-hosted Zn-Pb deposit Australia [J]. Economic Geology, 2021, 116(3): 693-718.
15 LEACH D L, BRADLEY D C, HUSTON D, et al. Sediment-hosted lead-zinc deposits in Earth history [J]. Economic Geology, 2010, 105: 593-625.
16 MA G, BEAUDOIN G, ZHONG S, et al. Geology and geochemistry of the Dengjishan Zn-Pb SEDEX deposit, Qinling belt, China [J]. Canadian Journal of Earth Sciences, 2007, 44: 479-492.
17 GADD M G, LAYTON-MATTHEWS D, PETER J M, et al. The worldclass Howard's Pass SEDEX Zn-Pb district, Selwyn Basin, Yukon. Part I: trace element compositions of pyrite record input of hydrothermal, diagenetic and metamorphic fluids to mineralization [J]. Mineral Deposita, 2016, 51: 319-342.
18 RAISWELL R, BUCKLEY F, BERNER R A, et al. Degree of pyritization of iron as a paleoenvironmental indicator of bottom water oxygenation [J]. Journal of Sedimentary Research, 1988, 58: 812-819.
19 GOLDHABER M B. Sulfur-rich sediments [C]// MACKENZIE F T. Treatise on geochemistry. Amsterdam: Elsevier, 2003, 7: 257-288.
20 SANGSTER D F. Toward an integrated genetic model for vent-distal SEDEX deposits[J]. Mineral Deposita, 2018, 53: 509-527.
21 SLACK J F, FALCK H, KELLEY K D, et al. Geochemistry of host rocks in the Howards Pass district, Yukon-Northwest Territories, Canada: implications for sedimentary environments of Zn-Pb and phosphate mineralization [J]. Mineral Deposita, 2017, 52: 565-593.
22 JOHNSON C A, SLACK J F, DUMOULIN J A, et al. Sulfur isotopes of host strata for Howards Pass (Yukon-Northwest Territories) Zn-Pb deposits implicate anaerobic oxidation of methane, not basin stagnation [J]. Geology, 2018, 46: 619-622.
23 COOKE D R, BULL S W, LARGE R R, et al. The importance of oxidized brines for the formation of Australian Proterozoic stratiform sediment-hosted Pb-Zn (SEDEX) deposits [J]. Economic Geology, 2000, 95: 1-18.
24 ELDRIDGE C S, WILLIAMS N, WALSHE J L. Sulfur isotope variability in sediment-hosted massive sulfide deposits as determined using the ion microprobe SHRIMP: II. a study of the H.Y.C. deposit at McArthur River, northern Territory, Australia [J]. Economic Geology, 1993, 88:1-26.
25 GADD M G, LAYTON-MATHEWS D, PETER J M, et al. The world-class Howard's Pass SEDEX Zn-Pb district, Selwyn Basin, Yukon. Part II: the roles of thermochemical and bacterial sulfate reduction in metal fixation [J]. Mineral Deposita, 2017, 52: 405-419.
26 GOODFELLOW W D, JONASSON I R. Ocean stagnation and ventilation defined by δ34S secular trends in pyrite and barite, Selwyn Basin, Yukon [J]. Geology, 1984, 12: 583-586.
27 KELLEY K D, LEACH D L, JOHNSON C A, et al. Textural, compositional, and sulfur isotope variations of sulfide minerals in the Red Dog Zn-Pb-Ag deposits, Brooks Range, Alaska: implications for ore formation [J]. Economic Geology, 2004, 99: 1 509-1 532.
28 BOROWSKI W S. A review of methane and gas hydrates in the dynamic, stratified system of the Blake Ridge region, offshore southeastern North America[J]. Chemical Geology, 2004, 205: 311-346.
29 LASH G G. Pyritization induced by Anaerobic Oxidation of Methane (AOM)—an example from the upper Devonian shale succession, western New York, USA [J]. Marine and Petroleum Geology, 2015, 68: 520-535.
30 LIN Z Y, SUN X M, PECKMANN J, et al. How sulfate-driven anaerobic oxidation of methane affects the sulfur isotopic composition of pyrite: a SIMS study from the South China Sea [J]. Chemical Geology, 2016, 440: 26-41.
31 LIN Z Y, SUN X M, STRAUSS H, et al. Multiple sulfur isotope constraints on sulfate-driven anaerobic oxidation of methane: evidence from authigenic pyrite in seepage areas of the South China Sea[J]. Geochimica et Cosmochimica Acta, 2017, 211: 153-173.
32 BROADBENT G C, MYERS R E, WRIGHT J V. Geology and origin of shale-hosted Zn-Pb-Ag mineralization at the Century deposit, northwest Queensland, Australia [J]. Economic Geology, 1998, 93: 1 264-1 294.
33 KELLEY K D, DUMOULIN J A, JENNINGS S, et al. The Anarraaq Zn-Pb-Ag and barite deposit, northern Alaska: evidence for replacement of carbonate by barite and sulfides [J]. Economic Geology, 2004, 99: 1 577-1 591.
34 MAGHFOURI S, HOSSEINZADEH M R, CHOULET F, et al. Vent-proximal sub-seafloor replacement clastic-carbonate hosted SEDEX-type mineralization in the Mehdiabad world-class Zn-Pb-Ba-(Cu-Ag) deposit, southern Yazd Basin, Iran [J]. Ore Geology Reviews, 2019, 113. DOI:.
doi: 10.1016/j.oregeorev.2019.103047
35 DERAKHSHI M G, HOSSEINZADEH M R, MOAYYED M, et al. Geological, isotope geochemical and fluid inclusion constraints on the Mishu SEDEX-type Barite (Pb-Cu-Zn) system, NW Iran [J]. Ore Geology Reviews, 2020, 121. DOI:.
doi: 10.1016/j.oregeorev.2020.103493
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