Chemical Composition of Minerals in Xuebaoding W-Sn-Be Deposit, Sichuan Province: Constraints on Ore Genesis

ZHU Xin-xiang; LIU Yan

doi:10.15898/j.cnki.11-2131/td.202101100006

Rock and Mineral Analysis > 2021 > 40(2): 296-305. > DOI: 10.15898/j.cnki.11-2131/td.202101100006

ZHU Xin-xiang, LIU Yan. Chemical Composition of Minerals in Xuebaoding W-Sn-Be Deposit, Sichuan Province: Constraints on Ore Genesis[J]. Rock and Mineral Analysis, 2021, 40(2): 296-305. DOI: 10.15898/j.cnki.11-2131/td.202101100006

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Chemical Composition of Minerals in Xuebaoding W-Sn-Be Deposit, Sichuan Province: Constraints on Ore Genesis

ZHU Xin-xiang^1,2,,
LIU Yan^1, ,

1.
Institute of Geology, Chinese Academy of Geological Science, Beijing 100037, China
2.
China University of Geosciences(Beijing), Beijing 100083, China

More Information

Received Date: January 09, 2021
Revised Date: March 06, 2021
Accepted Date: March 15, 2021
Published Date: March 27, 2021

Abstract

HIGHLIGHTS
(1) Major and trace elements of coarse-grained minerals were obtained by XRF, EMPA and ICP-MS.

(2) Major and trace elements of coarse-grained minerals mainly came from the rock mass in the area, and Ca was provided by the marble strata.

(3) The genetic mechanism of coarse-grained minerals in the Xuebaoding deposit was revealed.

ABSTRACT

BACKGROUNDThe Xuebaoding deposit, located in the Songpan-Ganzi orogenic belt, Sichuan Province, is famous for coarse-grained W-Sn-Be-F-P-bearing minerals. Many studies have been carried out on this deposit, but there is a lack of research on major and trace elements of coarse-grained minerals.
OBJECTIVESTo obtain major and trace element composition of minerals and provide constraints on ore genesis of the Xuebaoding deposit.
METHODSIn this study, X-ray fluorescence spectrometry (XRF) and electron probe microanalysis (EMPA) were used to analyze the major elements of minerals in the deposit, and the trace elements were analyzed by inductively coupled plasma mass spectrometry (ICP-MS).
RESULTSThe results showed that beryl, scheelite, cassiterite, muscovite, fluorite, apatite and tourmaline in the Xuebaoding deposit were rich in major ore-forming elements (W, Sn, Be, Na, K, Ca) and alkali metal elements such as Li, Rb, Cs, and volatiles such as F, B, and P. Beryl in the Xuebaoding deposit was rich in Li (3484-4243μg/g), Rb (39.3-71.1μg/g) and Cs (2955-3526μg/g). The content of Li, Rb and Cs in muscovite was as high as 4243μg/g, 72.3μg/g and 3526μg/g, respectively. The content of F in apatite and B in tourmaline were 4.48%-5.21% and 30990-32880μg/g, respectively. The granites in the Xuebaoding deposit were relatively rich in W, Sn, Be, Li, Rb, Cs, F, B, P, with relatively low CaO content (0. 46%-0. 82%). Li, Rb, Cs, F, B, P were conducive to the enrichment of ore-forming elements in fluids. Marble in the mining area was calcite marble, which provided a large amount of Ca for mineralization and was conducive to the large-scale precipitation of coarse-grained minerals.
CONCLUSIONSW, Sn, Be, Li, Rb, Cs, F, B and P in coarse-grained minerals are mainly derived from magmatic fluids, where the marble strata provide a large amount of Ca for coarse-grained minerals.
- Xuebaoding,
- W-Sn-Be deposit,
- X-ray fluorescence spectrometry,
- inductively coupled plasma-mass spectrometry,
- electron probe,
- chemical composition,
- ore genesis

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