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Geochemical and Li-bearing Characteristics of Fluids from Borehole ZK001 in Huangjinkou Anticline of the Northeastern Sichuan, China(PDF)

《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

Issue:
2019年第02期
Page:
197-208
Research Field:
基础地质与矿产地质
Publishing date:

Info

Title:
Geochemical and Li-bearing Characteristics of Fluids from Borehole ZK001 in Huangjinkou Anticline of the Northeastern Sichuan, China
Author(s):
GAO Juan-qin1; 2;  YU Yang1*;  ZHONG Jia-ai1;  LIU Zhu3;  ZHANG Sai1; 2;  PANG Bo3
(1. MNR Key Laboratory of Metallogeny and Mineral Resource Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China; 2. School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China; 3. No.405 Geological Party, Sichuan Bureauof Geology and Mineral Exploration and Development, Dujiangyan 611830, Sichuan, China)
Keywords:
geochemistry;  scientific drilling;  deep brine;  fluid during drilling;  Li-rich;  brine resource;  hydrochemical characteristic;  Sichuan
PACS:
P592; P595
DOI:
-
Abstract:
Since great breakthrough was made in purifying lithium carbonate from brine with high content of magnesium and low content of lithium, extracting lithium from brine has obtained increasing attention in China. Potassium-rich brine in the northeastern Sichuan contains many kinds of rare metals such as lithium which is urgently demanded in strategic emerging industries, while associated lithium resources of potassium-bearing brine are rarely considered in previous studies. A borehole(ZK001)with the depth of 3 227 m was arranged in deep exploration project in Xuanhan area of the northeastern Sichuan, of which the main goal is to investigate lithium-bearing brines in the deep. Analysis of fluids during drilling(conventional circulating drilling gas)is a main method of conventional real-time monitoring of wellhead fluids. As a result of lithium’s active property, it is difficult to reveal enrichment features of lithium by gas component only. Fluids of borehole ZK001(include deep brine, fluids during drilling, drilling-washing water), surface water and groundwater around borehole ZK001 were collected and analyzed; the characteristics of fluids during drilling were obtained for the first time; and the vertical variations of lithium and other components of drilling fluids in borehole ZK001 were summarized. The lithium concentrations in different types of water around borehole ZK001 show a rule that deep brine, drilling-washing water, fluids during drilling, groundwater, and surface water in descending order. By comparing the profile characteristics of the composition of fluids during drilling in borehole ZK001, it is discovered that lithium concentration of fluids during drilling in the depth of 0-500 m is relatively high while the ratio of Mg/Li is low. It is revealed that lithium concentration of fluids during drilling is proportional to the depth, and the ratio of Mg/Li is inversely proportional to depth. Lithium concentration of yellow brine collected at the depth of 3 000 m from borehole ZK001 is 10 556 μg·L-1(the ratio of Mg/Li is 33.92), which almost reaches the half of the cut-off grade(24 599 μg·L-1). In addition, Na, K, Rb, Sr components of the yellow brine from borehole ZK001 reach industrial grade. These features of fluids from borehole ZK001 will provide scientific support for future arrangement in drilling engineering.

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Last Update: 2019-02-28