胶东海域金矿床元素富集贫化特征及深部预测

doi:10.11720/wtyht.2021.1099

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Abstract

The Haiyu gold deposit, as a superlarge gold deposit with gold reserves of 470 t and average grade of 4.30×10^-6, is a typical Jiaojia-type gold deposit. The authors carried out the rock geochemical survey by the samples from drillholes, and detected the enrichment of Au, Cu, Pb, Zn, Ag, As, Sb, Cd, Bi, S and Fe₂O₃ and the depletion of Na₂O, Ba and Sr in the ore-hosting tectonic alteration zone. The authors systematically summarized the geochemical marks used for exploration. The enrichment of S and Au, or called the positive S and Au anomalies, is the typical geochemical mark of the source rock. The enrichment of S, Au, Ag and Bi and the depletion of Na₂O and CaO are typical geochemical marks of the tectonic alteration zone. Based on the above elements and their anomalies, the authors constructed the ore-induced anomaly model of the Haiyu gold deposit, which provides a useful reference for the exploration of the peripheral and deep-seated gold deposits. It is proposed that the main gold orebodies of the ore-forming zone of the sea field may be along ZK2403, ZK3008, and ZK3814 boreholes spread in NEE direction.

Key words： Haiyu gold deposit rock geochemical survey enrichment or depletion ore-induced anomaly model

Received: 29 February 2020 Published: 20 August 2021

ZTFLH:

P632

Corresponding Authors: MA Sheng-Ming E-mail: 15634333042@163.com;msmigge@163.com

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	Liang-Liang ZHANG
	Li-Xin ZHU
	Sheng-Ming MA
	Shao-Yi LIN
	Chang-Guo DAI
	Ming-Ling ZHOU
	Guang HUO
	Zhong-Hua XU
	Ming-Jie XI
	Tao ZHANG

Cite this article:

Liang-Liang ZHANG,Li-Xin ZHU,Sheng-Ming MA, et al. Elements enrichment and dilution characteristics and deep metallogenic prognosis in the Haiyu gold deposit, Jiaodong Peninsula[J]. Geophysical and Geochemical Exploration, 2021, 45(4): 835-845.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2021.1099 OR https://www.wutanyuhuatan.com/EN/Y2021/V45/I4/835

20])
1—Quaternary; 2—Neogene,Paleogene; 3—Cretaceous; 4. Paleo-Neoproterozoic; 5—Neoproterozoic granitic gneiss containing eclogite; 6—Archean granite-greenstone belt; 7—Cretaceous Laoshan granite; 8—Cretaceous Weideshan granite; 9—Cretaceous Guojialing granodiorite; 10—Jurassic granite; 11—Triassic granite; 12—Conformity/unconformity geological boundary; 13—fault; 14—the location of the shallow gold deposits proven in the past (the diameters from large to small indicate super-large gold deposits with resource reserves ≥100 t, large-scale gold deposits with resource reserves of 20~100 t, medium-sized gold deposits with resource reserves of 5~20 t and small-scale gold deposits with reserves <5 t); 15—the location of the newly discovered deep gold deposit (the diameter has the same meaning as in legend 14); 16—altered-rock type gold deposits/quartz-vein type gold deposits/other types of gold deposits; 17—the location of north Sanshan island water gold deposit
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Regional geological map of the Jiaodong Peninsula,showing distribution of gold deposits (modified from Song M C,et al^[20])
1—Quaternary; 2—Neogene,Paleogene; 3—Cretaceous; 4. Paleo-Neoproterozoic; 5—Neoproterozoic granitic gneiss containing eclogite; 6—Archean granite-greenstone belt; 7—Cretaceous Laoshan granite; 8—Cretaceous Weideshan granite; 9—Cretaceous Guojialing granodiorite; 10—Jurassic granite; 11—Triassic granite; 12—Conformity/unconformity geological boundary; 13—fault; 14—the location of the shallow gold deposits proven in the past (the diameters from large to small indicate super-large gold deposits with resource reserves ≥100 t, large-scale gold deposits with resource reserves of 20~100 t, medium-sized gold deposits with resource reserves of 5~20 t and small-scale gold deposits with reserves <5 t); 15—the location of the newly discovered deep gold deposit (the diameter has the same meaning as in legend 14); 16—altered-rock type gold deposits/quartz-vein type gold deposits/other types of gold deposits; 17—the location of north Sanshan island water gold deposit

Microscopic characteristics of altered rocks and gold deposits in Haiyu gold deposit
a—potassium, the picture shows potassium feldspar wrapped plagioclase; b—sericification of the hanging wall of the fault, it can be seen that the sericite surface alteration metasomatizes potassium feldspar and plagioclase, and the silicification is embodied as wavy matte quartz; c—pyrite-sericite-quartzized cataclastic rock, where plagioclase and potash feldspar are all corroded into sericite and quartz, and gold-bearing pyrites are distributed in veins; d—scattered pyrite in pyrite-sericite-quartzized cataclastic rocks; e—gold minerals are distributed in pyrite in the form of brecciated inclusion gold and linear interstitial gold; f—gold minerals are encased in pyrite in an oval shape;Kf—potash feldsparl;Pl—plagioclase;Qz—quartz;Ser—sericite;Py—pyrite;Au—gold mineral

Sample test method and the result statistics of quality monitoring

Statistical table of element content and enrichment coefficient in different geological units of Haiyu gold deposit

Borehole rock survey anomaly diagram of the Haiyu gold deposit

Ore-induced anomaly pattern diagram of the Haiyu gold deposit

Prospective ore-forming location of of Haiyu gold deposit

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