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author:

Wu, Xiaolin (Wu, Xiaolin.) [1] | Zhao, Junfeng (Zhao, Junfeng.) [2] | Liu, Wenyuan (Liu, Wenyuan.) [3] (Scholars:刘文元) | Xie, Guiqing (Xie, Guiqing.) [4] | Ye, Zi (Ye, Zi.) [5] | Li, Zhiyuan (Li, Zhiyuan.) [6] | Sun, Hongjun (Sun, Hongjun.) [7]

Indexed by:

EI Scopus SCIE

Abstract:

The newly discovered Shuangjianzishan giant Ag-Pb-Zn deposit which located in the Southern segment of the Great Xing'an Range (SGXR), has controlled more than 18 000 t reserves of Ag, 1.9 Mt reserves of Zn, and 3.3 Mt reserves of Pb. Previous research has shown that Shuangjianzishan is a typical epithermal Ag-Pb-Zn deposit, however, mid-to high-temperature Cu-Sn (-W) mineralization are few studies. In this paper, a detailed mineralogical study reveals that a remarkable Cu-Sn (-W) mineralization is observed both in the upper tunnel and the deeper drill core samples. In the shallow ore-bodies, tin dominantly occurs as canfieldite in Pb-Zn-rich ores, minor as cassiterite-quartz veinlets. In the deep drill cores, tin occurs as cassiterite in the Cu-rich ores with the assemblage of quartz-arsenopyrite-chalcopyrite-stannite-(wolframite). Four primary paragenetic stages have been recognized. Stage I: cassiterite-quartz-arsenopyrite-chalcopyrite, including two sub-stage: cassiterite-arsenopyrite-pyrrhotite-quartz (stage I1) and sphalerite-chalcopyrite-galena-pyrite (stage I2); Stage II: galenasphalerite-silver minerals; Stage III: Quartz-silver minerals, and stage IV: pyrite-carbonate.Electron probe micro-analysis (EPMA) show that the early mineralization (stage I) is characterized by Fe-rich sphalerite, Co-rich pyrite, Se-rich canfieldite, and Se-Bi-rich galena, while the later mineralization (stage II-IV) contains Fe-depleted sphalerite, As-rich pyrite, and Sb-bearing silver minerals. Laser-ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) analysis show that cassiterite has high contents of W, Fe, Sb, and Ti and depleted in Nb and Ta. Mineral associations and compositions implies a cassiterite-sulfide type tin mineralization in the Shuangjianzishan Ag-Pb-Zn deposit.A concealed granite porphyry intrusion was exposed in deep drill cores in the northwest part of the ore-field, with zircon U-Pb ages of (137.8 & PLUSMN; 1.1) Ma and (136.8 & PLUSMN; 1.0) Ma for fine-and coarse-grains granite, respectively. Bulk analysis shows that concealed granites are characterized by a highly fractionated, relatively reduced, and high K-calc-alkaline to alkaline, which belongs to A-type granites, and the remnant of Sn-bearing titanite suggests that it has the potential to provide the source of tin. Zircon U-Pb age (138-130 Ma) is well coupled with the previous data (ore-forming age, 136-129 Ma) of Shuangjianzishan, suggesting a close temporal and genetic relationship between tin mineralization and emplacement of the granite. This contribution implies that the Shuangjianzishan deposit may exist a middle-to high-temperature Cu-Sn (-W) mineralization center rather than a simple low-temperature hydrothermal system, and shows there is significant Sn-Cu mineralization potential in the peripheral and root zone of ore district.

Keyword:

Cassiterite Mineralogy Shuangjianzishan Ag-Pb-Zn deposit Tin mineralization

Community:

  • [ 1 ] [Wu, Xiaolin]Fuzhou Univ, Zijin Sch Geol & Min, Fuzhou 350108, Peoples R China
  • [ 2 ] [Zhao, Junfeng]Fuzhou Univ, Zijin Sch Geol & Min, Fuzhou 350108, Peoples R China
  • [ 3 ] [Liu, Wenyuan]Fuzhou Univ, Zijin Sch Geol & Min, Fuzhou 350108, Peoples R China
  • [ 4 ] [Xie, Guiqing]Fuzhou Univ, Zijin Sch Geol & Min, Fuzhou 350108, Peoples R China
  • [ 5 ] [Ye, Zi]Fuzhou Univ, Zijin Sch Geol & Min, Fuzhou 350108, Peoples R China
  • [ 6 ] [Wu, Xiaolin]China Univ Geosci, Sch Earth Sci & Resources, Beijing 100083, Peoples R China
  • [ 7 ] [Xie, Guiqing]China Univ Geosci, Sch Earth Sci & Resources, Beijing 100083, Peoples R China
  • [ 8 ] [Zhao, Junfeng]Chinese Acad Sci, Guangzhou Inst Geochem, CAS Key Lab Mineral & Metallogeny, Guangzhou 510640, Peoples R China
  • [ 9 ] [Zhao, Junfeng]Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China
  • [ 10 ] [Li, Zhiyuan]Chifeng Yubang Min Co, Chifeng 024000, Peoples R China
  • [ 11 ] [Sun, Hongjun]Chifeng Yubang Min Co, Chifeng 024000, Peoples R China

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Source :

ORE GEOLOGY REVIEWS

ISSN: 0169-1368

Year: 2023

Volume: 152

3 . 2

JCR@2023

3 . 2 0 0

JCR@2023

ESI Discipline: GEOSCIENCES;

ESI HC Threshold:26

JCR Journal Grade:1

CAS Journal Grade:1

Cited Count:

WoS CC Cited Count: 4

SCOPUS Cited Count: 4

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 2

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