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Molybdenite Re–Os and albite 40Ar/39Ar dating of Cu–Au–Mo and magnetite porphyry systems in the Yangtze River valley and metallogenic implications

Published on Nov 1, 2006in Ore Geology Reviews 3.39
· DOI :10.1016/j.oregeorev.2005.11.001
Jingwen Mao33
Estimated H-index: 33
(China University of Geosciences),
Yitian Wang3
Estimated H-index: 3
+ 7 AuthorsTaofa Zhou16
Estimated H-index: 16
(Hefei University of Technology)
Cite
Abstract
Abstract The area of the Middle–Lower Yangtze River valley, Eastern China, extending from Wuhan (Hubei province) to western Zhenjiang (Jiangsu province), hosts an important belt of Cu–Au–Mo and Fe deposits. There are two styles of mineralization, i.e., skarn/porphyry/stratabound Cu–Au–Mo–(Fe) deposits and magnetite porphyry deposits in several NNE-trending Cretaceous fault-bound volcanic basins. The origin of both deposit systems is much debated. We dated 11 molybdenite samples from five skarn/porphyry Cu–Au–Mo deposits and 5 molybdenite samples from the Datuanshan stratabound Cu–Au–Mo deposit by ICP-MS Re–Os isotope analysis. Nine samples from the same set were additionally analyzed by NTIMS on Re–Os. Results from the two methods are almost identical. The Re–Os model ages of 16 molybdenite samples range from 134.7 ± 2.3 to 143.7 ± 1.6 Ma (2 σ ). The model ages of the five samples from the Datuanshan stratabound deposit vary from 138.0 ± 3.2 to 140.8 ± 2.0 Ma, with a mean of 139.3 ± 2.6 Ma; their isochron age is 139.1 ± 2.7 Ma with an initial Os ratio of 0.7 ± 8.1 (MSWD = 0.29). These data indicate that the porphyry/skarn systems and the stratabound deposits have the same age and suggest an origin within the same metallogenic system. Albite 40 Ar/ 39 Ar dating of the magnetite porphyry deposits indicates that they formed at 123 to 125 Ma, i.e., 10–20 Ma later. Both mineralization styles characterize transitional geodynamic regimes, i.e., the period around 140 Ma when the main NS-trending compressional regime changed to an EW-trending lithospheric extensional regime, and the period of 125–115 Ma of dramatic EW-trending lithospheric extension.
  • References (31)
  • Citations (223)
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References31
Newest
Published on Sep 7, 2010in Acta Geologica Sinica-english Edition
Du Yangsong4
Estimated H-index: 4
(China University of Geosciences),
Tian Shihong3
Estimated H-index: 3
(China University of Geosciences)
+ 1 AuthorsLee Hyun Koo1
Estimated H-index: 1
(CNU: Chungnam National University)
A comprehensive contrast of ore-forming geological background and ore-forming fluid features, especially fluid ore-forming processes, has been performed between the Tianmashan and the Datuanshan ore deposits in Tongling, Anhui Province. The major reasons for the formation of the stratabound skarn Au-S ore deposit in Tianmashan and the stratabound skarn Cu ore deposit in Datuanshan are analyzed in accordance with this contrast. The magmatic pluton in Tianmashan is rich in Au and poor in Cu, but t...
Published on May 29, 2009in Acta Geologica Sinica-english Edition
Du Andao6
Estimated H-index: 6
,
He Hongliao2
Estimated H-index: 2
+ 5 AuthorsQUWenjun4
Estimated H-index: 4
This study deals with the first application of the isotope dilution-inductively coupled plasma mass spectrometry in the rhenium-osmium geochronometry in China. The chemical separation procedure included decomposition of samples by means of alkali fusion, extraction of rhenium by acetone and extraction of osmium by distillation. The recovery of both elements in the entire process was more than 90% . The blanks of analyses were 0.07 ng for rhenium and 0.01 ng for 187 Os. The mineralization ages of...
Published on May 29, 2009in Acta Geologica Sinica-english Edition
Wang Dezi8
Estimated H-index: 8
(NU: Nanjing University),
Ren Qijiang2
Estimated H-index: 2
(NU: Nanjing University)
+ 3 AuthorsZeng Jiahu1
Estimated H-index: 1
(NU: Nanjing University)
The shoshonite province in eastern China is characterized by extensive distribution (ca. 80000 km2) of Late Jurassic–Early Cretaceous (165–100 Ma) shoshonite series with subordinate high–K calc–alkali series. It was formed in a dominantly tensile stress field. In comparison with their analogues in island arcs and active continental margins in other countries, the volcanic rocks in the shoshonite province have their specific characteristics in petrology, mineralogy and geochemistry as well as rel...
Published on Jan 1, 2005
Mei Yanxiong1
Estimated H-index: 1
,
Mao Jingwen1
Estimated H-index: 1
+ 1 AuthorsDu Andao6
Estimated H-index: 6
The Datuanshan copper deposit in Tongling, Anhui Province, is located in the middle section of the Middle and Lower Yangtze Valley iron-copper metallogenic belt. The metallogenic epoch of the deposit was previously regarded as Yanshanian on the basis of the ages of intermediate-acid intrusive rocks related to the ore-forming process. The authors collected 6 molybdenite samples from stratiform skarn orebodies in the Datuanshan copper deposit for Re-Os precise dating. The isochron age is 139.1±2.7...
Published on Aug 1, 2003in Science China-earth Sciences 2.26
Mao Jingwen17
Estimated H-index: 17
,
Wang Yitian4
Estimated H-index: 4
+ 1 AuthorsYu Jinjie Niu Baogui1
Estimated H-index: 1
Based on the summary of the highly precise datings of the metal deposits and related granitic rocks in North China craton and adjacent areas, such as the molybdenite Re-Os datings, 40 Ar- 39 Ar datings of mica, K-feldspar and quartz, some Rb-Sr isochrons, and the SHRIMP zircon U-Pb dating and single grain zircon U-Pb dating, we suggest that the large-scale mineralization in North China craton and adjacent areas take place in three periods of 200-160Ma, 140Ma, and 130-110Ma. Their corresponding g...
Published on Aug 1, 2003in Science China-earth Sciences 2.26
Zhang Qi6
Estimated H-index: 6
(CAS: Chinese Academy of Sciences),
Jian Ping9
Estimated H-index: 9
+ 3 AuthorsWang Yan Xue Huaimin1
Estimated H-index: 1
(Northwest University (United States))
The SHRIMP U-Pb ages are reported for two volcanic rocks from the Longwangshan and the Dawangshan formations respectively, Ningwu area, Jiangsu Province. The Dawangshan formation (NB-01) is dated at (127 3) Ma, and the Longwangshan formation (NL-01), (131 4) Ma. Besides, a few Archean zircons are also found in the Longwangshan formation, which suggests a possible Archean basement in the region.
Published on Aug 1, 2003in Science China-earth Sciences 2.26
Wu Ganguo2
Estimated H-index: 2
(China University of Geosciences)
Analysis of the deep tectonics and cover tectonic deformations shows that tectonic layering motion is a typical lithospheric characteristic in the Tongling area and the metallogenic belt of the middle-lower Yangtze. Controlling of the deep tectonosphere over the shallow-seated tectonosphere involves various grades of tectonic layering motions. Multi-layer, multi-grade, and multi-directional gliding tectonics are the specific modes of tectonic layering motions in the cover of the Tongling metallo...
Published on May 1, 2003in Economic Geology 3.29
Jingwen Mao33
Estimated H-index: 33
,
Bernd Lehmann33
Estimated H-index: 33
+ 5 AuthorsRobert Kerrich53
Estimated H-index: 53
(U of S: University of Saskatchewan)
Black shales of the basal Lower Cambrian Niutitang Formation, southeast China, host a regionally distributed concordant, several centimeter-thick, sulfide layer which displays extreme metal enrichment, i.e., Mo-NiSe-Re-Os-As-Hg-Sb >1,000 times enriched and Ag-Au-Pt-Pd >100 times enriched over bulk continental crust. Mineable portions have about 5.5 wt percent Mo, 3.5 wt percent Ni, and 1 g/t PGE + Au. A six-point 187 Os/ 188 Os versus 187 Re/ 188 Os isochron on molybdenum-nickel ore samples defi...
Published on Feb 1, 2003in Mineralium Deposita 3.40
Jingwen Mao33
Estimated H-index: 33
(China University of Geosciences),
Andao Du1
Estimated H-index: 1
+ 1 AuthorsJinjie Yu3
Estimated H-index: 3
The ages for pegmatite rare metal and beryl (emerald) deposits, as well as porphyry Mo deposits in the Hercynian Uralide orogen, are not well known. Five molybdenite samples from the Lipovy Log pegmatite Ta–Nb–Mo deposit and 11 molybdenite samples from the Shameika porphyry Mo deposit were selected for Re–Os dating. Both mineral occurrences are spatial-temporally associated with the Adui composite granite pluton, a well-known rare metal-related granite intrusion. A Re–Os isochron age of 262.0±7....
Published on Jan 1, 2003
Jianjun Lu13
Estimated H-index: 13
,
Ren-Min Hua1
Estimated H-index: 1
,
Shao-Yong Jiang40
Estimated H-index: 40
Cited By223
Newest
Published on Apr 1, 2019in Journal of Geochemical Exploration 3.47
Yeşim Özen2
Estimated H-index: 2
(Selçuk University),
Fetullah Arik3
Estimated H-index: 3
(Selçuk University)
Abstract The Pinarbasi porphyry Cu Mo mineralization is located at northwest of Gediz (Kutahya-Turkey) and east of Simav (Kutahya-Turkey) in western Anatolia. The Pinarbasi Cu Mo mineralization is hosted by Pinarbasi granitoidic intrusion consisting of granite, granodiorite and quartz monzonite. Geochemical and geochronological evidences for Pinarbasi granitoidic rocks show that they are high-K calc-alkaline, and I-type granitoid magma likely developed post-collisional extensional regime. The U ...
Published in Minerals 2.25
The newly discovered Magushan Cu-Mo polymetallic deposit, located in southeastern Anhui, eastern China, is a middle-scale skarn-type polymetallic deposit with different ore types of veinlets-disseminated skarn (the primary type), quartz veins, and porphyry. LA-ICP-MS zircon U–Pb analyses yielded a crystallization age of 135.7 ± 1.5 Ma for the ore-related granodiorite in Magushan. The granodiorites are I-type granites in nature, characterized by metaluminous and high-K calc-alkaline characteristi...
Published on Jun 1, 2019in Geochimica et Cosmochimica Acta 4.26
Zhi-Kun Su (China University of Geosciences), Xin-Fu Zhao20
Estimated H-index: 20
(China University of Geosciences)
+ 2 AuthorsAlbert H. Hofstra17
Estimated H-index: 17
(USGS: United States Geological Survey)
Abstract Tourmaline is a common boron-bearing mineral in hydrothermal system and has been widely used as a mineral probe to reconstruct geological processes because of its broad range in composition and resistance to metasomatic alteration. The origin of Kiruna-type iron oxide-apatite (IOA) deposits, commonly linked to andesitic subvolcanic or volcanic rocks, is highly controversial. Constraints on the evolution of these mineralizing systems are needed to advance understanding of the ore-forming...
Published on Aug 1, 2019in Ore Geology Reviews 3.39
Thanh Tien Nguyen (Hanoi University), Tuyen Danh Vu (Hanoi University)
Abstract Multivariate geochemical anomaly identification is one of the most important tasks in exploration geochemical data analysis. This paper proposes a new approach to identify multivariate geochemical anomalies which accounts for the degree of spatial autocorrelation among observations. This method is a combination of Robust Mahalanobis Distance (RMD), spatial autocorrelation analysis and robust statistics. The Minimum Covariance Determinant (MCD) estimator-based RMDs were first used to red...
Published on May 1, 2019in Ore Geology Reviews 3.39
Ahmad Rabiee , Federico Rossetti32
Estimated H-index: 32
+ 7 AuthorsDavid Selby33
Estimated H-index: 33
The Siah-Kamar Mo deposit (SKMD) is located at the northwestern termination of the Urumieh-Dokhtar magmatic zone and it is the only porphyry Mo ore reserve in Iran. The exploration program documented 39.2 Mt proved reserves @ 539 ppm Mo and 66.4 Mt probable reserves @ 266 ppm Mo. In this study, field and petrographic investigations, integrated with geochemical (fluid inclusion and quartz chemistry) and geochronological (U-Pb zircon, Re-Os molybdenite, and Rb-Sr multimineral isochron) studies are...
Published on Jun 1, 2019in Ore Geology Reviews 3.39
Jiancheng Xie2
Estimated H-index: 2
,
Dawei Tang + 4 AuthorsWeidong Sun47
Estimated H-index: 47
Abstract The Cu-Mo polymetallic deposits are widespread in the Chizhou region, the Middle and Lower Yangtze River metallogenic belt, eastern China, but the formation of Cu-Mo polymetallic deposits remains unclear. Geochronological, geochemical and Sr-Nd-Hf isotopic compositions of the Cu-Mo polymetallic deposits in the Chizhou region are systemically investigated to reveal the formation of Cu-Mo polymetallic deposits and petrogenesis of the granodiorite (porphyry). The geochronological dating re...
Published on May 13, 2019in Resource Geology 1.11
Weiwei Chao (University of Tsukuba), Ken-ichiro Hayashi14
Estimated H-index: 14
(University of Tsukuba)
+ 5 AuthorsQiuming Pei5
Estimated H-index: 5
Published on Apr 1, 2019in Journal of Asian Earth Sciences 2.76
Kun Zhang1
Estimated H-index: 1
,
Qingtian Lü1
Estimated H-index: 1
+ 3 AuthorsFan Luo (CUTe: China University of Technology)
Abstract The Ning (Nanjing city)-Wu (Wuhu City) volcanic basin, which is famous for its large-scale, high-grade ore deposits, is a typical iron ore district in the middle-lower reaches of the Yangtze River Metallogenic Belt (MLRYMB). The southern part of the basin is primarily covered by Quaternary strata. Few in depth studies have been conducted on this area. Due to the increasing demand for mineral resources and the controversy over regional tectonic models, some fundamental geological issues ...
Published on Apr 1, 2019
Shunfu Lu (CAS: Chinese Academy of Sciences), Xiaoqing Zhu (CAS: Chinese Academy of Sciences), Xiaofen Li
The Ningzhen region of China is located in the easternmost part of the middle-lower Yangtze River Cu–Fe polymetallic metallogenic belt. From west to east, it comprises five main intermediate–acidic intrusive complexes: the Qilinmen, Anjishan, Xiashu–Gaozi, Shima, and Jianbi complexes. Geochemical investigations show that these five intrusive complexes exhibit high contents of SiO2, at 64.74–73.40 wt%, Al2O3, at 14.15–17.37 wt%, and K2O + Na2O, at 6.49–8.68 wt%. The majority of the samples belong...