Geological and geochemical characteristics and metallogenic model of the Wenquan molybdenum deposit

被引：2

作者：

Wu Z. ^{[1
,2
]}

Liu J. ^{[1
]}

Han H. ^{[3
]}

Dong X. ^{[1
]}

Ouyang Y. ^{[1
]}

机构：

[1] School of Geosciences and Environmental Engineering, Central South University

[2] Gansu Institute of Geology for Nonferrous Metals

[3] Tianshui General Party of Gansu Nonferrous Metals Geological Exploration Bureau

来源：

Chinese Journal of Geochemistry | 2011年 / 30卷 / 3期

关键词：

geological and geochemical characteristics; granitic batholith; metallogenic model; molybdenum deposit; porphyry; Wenquan;

D O I：

10.1007/s11631-011-0524-4

中图分类号：

学科分类号：

摘要：

The Wenquan molybdenum deposit is a kind of large-sized porphyry molybdenum deposit found in recent years. In this paper, on the basis of deposit geology, geochemistry and isotope geochronology data, the metallogenic model of this deposit was established. The Wenquan granitic batholith belongs to the K-rich (alkali-rich) calc-alkaline rock series, which is the mineralization parent rock. The rock massif shows the characteristics of both crust-remelting granite and mantle-source granite. At the same time, the data of REE contents, hydrogen and oxygen isotopes and inclusion temperatures showed that the metallogenic hydrothermal solution is a mixed mesothermal solution of magmato-hydrothermal fluid and meteoric water. Mineralization was dated at 214±7.1 Ma, basically identical with the parent rock's age (207-226 Ma). This reflects that molybdenum mineralization has a close relation to tectonic magmatism evoked by orogenic processes, and molybdenum mineralization occurred mainly at the petrogenesis stage at the late stage of magma emplacement. Mixing with meteoric water led to a decrease in the salinity of magmato-hydrothermal solution and changes in other physical and chemical properties. During the tectonic process, ore-bearing hydrothermal solution ascended along favorable fault structure channels. With physicochemical changes, it filled in the surrounding rock joints on both sides of faults, forming ore deposits. © 2011 Science Press, Institute of Geochemistry, CAS and Springer-Verlag Berlin Heidelberg.

引用

页码：391 / 397

页数：6

共 22 条

[1]

Han H., Liu J., Dong X., Ouyang Y., Geology and genesis of the Wenquan porphyry molybdenum deposits in west Qinling area [J], Geology and Prospecting, 44, pp. 1-7, (2008)

[2]

Han H., Liu J., Dong X., Zhou Y., Wang G., Shi J., Geochemical characteristics of the Wenquan porphyry molybdenum deposits in west Qinling area [J], Geophysical & Geochemical Exploration, 32, pp. 139-142, (2008)

[3]

Hou Z., Mo X., Qu X., Origin of adakitic rocks generated during the mid-Miocene east-west extension in South Tibet [J], Earth Planet Sci Lett, 220, pp. 139-150, (2004)

[4]

Hou Z., Porphyry Cu-Mo-Au deposits: Some new insights and advances [J], Earth Science Frontiers, 11, pp. 131-144, (2004)

[5]

Huang D., Dong Q., Gan Z., China Molybdenum Deposits [A], pp. 482-538, (1989)

[6]

Huang D., Wu C., Du A., Re-Os isotopic dating of molybdenite and its implication for molybdenum deposits in east Qinling area [J], Mineral Deposits, 13, pp. 221-230, (1994)

[7]

Kirkham R.V., Sinclare W.D., Porphyry copper, gold, molybdenum, tungsten, tin and silver: Geology of Canadian mineral deposit type [J], Geol. N. Am, 1, pp. 421-446, (1995)

[8]

Li Y., Wang C., Bai F., Song Y., Re-Os isotopic Ages of Mo deposits in East Qinling and their geodynamic settings [J], Mineral Resources and Geology, 106, pp. 571-578, (2004)

[9]

Li Y., Gao Z., Li Y., Li Z., Liu Z., The geochemical features of the Wenquan magma-mingling granite in western Qinling [J], Geology and Geochemistry, 31, pp. 43-49, (2003)

[10]

Luo Z., Mo X., Lu X., Metallogeny by trans-magmatic fluids-theoretical analysis and field evidence [J], Earth Science Frontiers, 14, pp. 165-183, (2007)

← 1 2 3 →