	US 12,203,917 B2
	Method for determining ore-forming environment of porphyry deposit based on tourmaline component
Youye Zheng, Beijing (CN); Jianzhou Yi, Beijing (CN); Peng Liu, Beijing (CN); Song Wu, Beijing (CN); Xiaofang Dou, Beijing (CN); Quansheng Shen, Lhasa (CN); Zhixin Zhang, Lhasa (CN); Jinling Liao, Lhasa (CN); Jiancuo Luosang, Lhasa (CN); Defu Shu, Lhasa (CN); Qiong Ci, Lhasa (CN); and Xiaofeng Liu, Lhasa (CN)
Assigned to CHINA UNIVERSITY OF GEOSCIENCES (BEIJING), Beijing (CN); and Tibet Julong Copper Co., Ltd., Lhasa (CN)
Filed by CHINA UNIVERSITY OF GEOSCIENCES (BEIJING), Beijing (CN); and Tibet Julong Copper Co., Ltd., Lhasa (CN)
Filed on Mar. 7, 2024, as Appl. No. 18/597,929.
Claims priority of application No. 202310731550.X (CN), filed on Jun. 20, 2023.
Prior Publication US 2024/0426802 A1, Dec. 26, 2024
Int. Cl. G01N 33/24 (2006.01); G01N 1/28 (2006.01); H01J 49/10 (2006.01)

CPC G01N 33/24 (2013.01) [G01N 1/286 (2013.01); H01J 49/105 (2013.01); G01N 2001/2866 (2013.01)]

6 Claims

1. A method for determining an ore-forming environment of a porphyry deposit based on a tourmaline component, comprising the following steps:

collecting a tourmaline-containing rock in the porphyry deposit to obtain a rock sample;

performing pretreatment on the rock sample to obtain a treated sample;

performing an in-situ tourmaline trace element test on the treated sample to obtain a test result;

performing data processing and interpretation on the test result to obtain tourmaline trace element data;

establishing a discrimination factor based on the tourmaline trace element data;

comprising the following steps:

the discrimination factor F1 is calculated;

a binary diagram is used directly to determine obviously different element contents in the two environments; a graph is plotted with Be as an abscissa and Ti as an ordinate; a boundary between the subduction environment and the collision environment is obtained according to a range on the plotted graph; the discrimination factor is calculated by:

F1:F1=4100.4*c(Be)^−0.88 (1)

the discrimination factor F2 is calculated;

for slightly different element contents in the two environments, the elements are multiplied pairwise to amplify differences of the element contents in different environments; then, a binary diagram is used for determination; a graph is plotted with Ni*Ga as an abscissa and V*Sn as an ordinate; a boundary between the subduction environment and the collision environment is obtained according to a range on the plotted graph; the discrimination factor is calculated by:

F2:F2=3*10¹²*(c(Ni)*c(Ga))^−2.53 (2)

determining the ore-forming environment based on the discrimination factor; comprising the following steps: the obtained Be content is brought into Eq. (1) to calculate the discrimination factor F1; if c(Ti)>F1, the subduction environment is determined; or otherwise, the collision environment is determined; the Ni content and the Ga content are brought into Eq. (2) to calculate the discrimination factor F2; if c(V)*c(Sn)>F2, the subduction environment is determined; or otherwise, the collision environment is determined.