Geochemistry and zircon trace elements composition of the Miocene ore‐bearing biotite monzogranite porphyry in the Demingding porphyry Cu‐Mo deposit, Tibet: Petrogenesis and implication for magma fertility

2019 ◽  
Vol 55 (6) ◽  
pp. 4525-4542
Author(s):  
Zebin Zhang ◽  
Liqiang Wang ◽  
Pan Tang ◽  
Bin Lin ◽  
Miao Sun ◽  
...  
Keyword(s):  
Trace Elements ◽  
Porphyry Cu ◽  
Zircon Trace Elements

DETRITAL ZIRCON TRACE ELEMENTS AS A PROXY FOR CRUSTAL EVOLUTION

2018 ◽  
Author(s):  
Hangyu Liu ◽  
◽  
N. Ryan McKenzie ◽  
Andrew J. Smye ◽  
Daniel F. Stockli
Keyword(s):  
Trace Elements ◽  
Detrital Zircon ◽  
Crustal Evolution ◽  
Zircon Trace Elements

scholarly journals Trace elements in magnetite from porphyry Cu–Mo–Au deposits in British Columbia, Canada

2016 ◽  
Vol 72 ◽  
pp. 1116-1128 ◽  
Author(s):  
Dante Canil ◽  
Carter Grondahl ◽  
Terri Lacourse ◽  
Laura K. Pisiak
Keyword(s):  
British Columbia ◽  
Trace Elements ◽  
Porphyry Cu

scholarly journals Identifying crystal accumulation and melt extraction during formation of high-silica granite

Geology ◽  
2021 ◽  
Author(s):  
Tian-Yu Lu ◽  
Zhen-Yu He ◽  
Reiner Klemd
Keyword(s):  
Trace Elements ◽  
Magma Source ◽  
Separation Processes ◽  
Southern Tibet ◽  
Intrusive Rocks ◽  
Melt Separation ◽  
Ca 50 ◽  
High Silica ◽  
Crystal Accumulation ◽  
Zircon Trace Elements

High-silica (<70 wt% SiO2) magmas are usually believed to form via shallow crustal–level fractional crystallization of intermediate magmas. However, the broad applicability of this model is controversial, because the required crystal-melt separation processes have rarely been documented globally up to now. The ca. 50 Ma Nyemo composite pluton of the Gangdese batholith belt in southern Tibet, which comprises intrusive rocks with intermediate- to high-silica compositions (65–78 wt%), offers a unique opportunity for substantiating the coexistence of extracted melts and complementary silicic cumulates in one of Earth’s most complete transcrustal silicic magmatic systems. The Nyemo pluton intrusive rocks exhibit similar zircon Hf isotopic compositional ranges (mean εHf(t) = +5.7 to +8.3), suggesting a common, non-radiogenic magma source with crustal assimilation in the deep crust. Yet, these rocks have distinct geochemical characteristics. High-silica miarolitic and rapakivi granites are strongly depleted in Ba, Sr, and Eu, and their zircon trace elements show extremely low Eu/Eu* and Dy/Yb. In contrast, monzogranite is relatively enriched in Ba and Sr with minor Eu anomalies, and the zircon trace elements are characterized by relatively high Eu/Eu* and Dy/Yb. Therefore, we propose that the high-silica granites represent highly fractionated melt extracted from a mush reservoir at unusually low storage pressure (~99–119 MPa), and that the monzogranite constitutes the complementary residual silicic cumulates.

Paleoproterozoic reworking of ancient crust in the Cathaysia Block, South China: Evidence from zircon trace elements, U-Pb and Lu-Hf isotopes

2009 ◽  
Vol 54 (9) ◽  
pp. 1543-1554 ◽  
Author(s):  
Rui Liu ◽  
HanWen Zhou ◽  
Li Zhang ◽  
ZengQiu Zhong ◽  
Wen Zeng ◽  
...  
Keyword(s):  
Trace Elements ◽  
South China ◽  
Hf Isotopes ◽  
Cathaysia Block ◽  
Zircon Trace Elements

scholarly journals The Relation between Trace Element Composition of Cu-(Fe) Sulfides and Hydrothermal Alteration in a Porphyry Copper Deposit: Insights from the Chuquicamata Underground Mine, Chile

Minerals ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 671
Author(s):  
Constanza Rivas-Romero ◽  
Martin Reich ◽  
Fernando Barra ◽  
Daniel Gregory ◽  
Sergio Pichott
Keyword(s):  
Trace Elements ◽  
High Temperature ◽  
Trace Element ◽  
Hydrothermal Alteration ◽  
Trace Element Composition ◽  
Element Composition ◽  
Underground Mine ◽  
Potassic Alteration ◽  
Porphyry Cu ◽  
Lower Temperature

Porphyry Cu-Mo deposits are among the world’s largest source of Cu, Mo, and Re, and are also an important source of other trace elements, such as Au and Ag. Despite the fact that chalcopyrite, bornite, and pyrite are the most common sulfides in this deposit type, their trace element content remains poorly constrained. In particular, little is known about minor and trace elements partitioning into Cu-(Fe) sulfides as a function of temperature and pH of the hydrothermal fluid. In this study, we report a comprehensive geochemical database of chalcopyrite, bornite, and pyrite in the super-giant Chuquicamata porphyry Cu-Mo deposit in northern Chile. The aim of our study, focused on the new Chuquicamata Underground mine, was to evaluate the trace element composition of each sulfide from the different hydrothermal alteration assemblages in the deposit. Our approach combines the electron microprobe analysis (EMPA) and laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) of sulfide minerals obtained from six representative drill cores that crosscut the chloritic (propylitic), background potassic, intense potassic, and quartz-sericite (phyllic) alteration zones. Microanalytical results show that chalcopyrite, bornite, and pyrite contain several trace elements, and the concentration varies significantly between hydrothermal alteration assemblages. Chalcopyrite, for example, is a host of Se (≤22,000 ppm), Pb (≤83.00 ppm), Sn (≤68.20 ppm), Ag (≤45.1 ppm), Bi (≤25.9 ppm), and In (≤22.8 ppm). Higher concentrations of Se, In, Pb, and Sn in chalcopyrite are related to the high temperature background potassic alteration, whereas lower concentrations of these elements are associated with the lower temperature alteration types: quartz-sericite and chloritic. Bornite, on the other hand, is only observed in the intense and background potassic alteration zones and is a significant host of Ag (≤752 ppm) and Bi (≤2960 ppm). Higher concentrations of Ag and Sn in bornite are associated with the intense potassic alteration, whereas lower concentrations of those two elements are observed in the background potassic alteration. Among all of the sulfide minerals analyzed, pyrite is the most significant host of trace elements, with significant concentrations of Co (≤1530 ppm), Ni (≤960 ppm), Cu (≤9700 ppm), and Ag (≤450 ppm). Co, Ni, Ag, and Cu concentration in pyrite vary with alteration: higher Ag and Cu concentrations are related to the high temperature background potassic alteration. The highest Co contents are associated with lower temperature alteration types (e.g., chloritic). These data indicate that the trace element concentration of chalcopyrite, bornite, and pyrite changed as a function of hydrothermal alteration is controlled by several factors, including temperature, pH, fO2, fS2, and the presence of co-crystallizing phases. Overall, our results provide new information on how trace element partitioning into sulfides relates to the main hydrothermal and mineralization events controlling the elemental budget at Chuquicamata. In particular, our data show that elemental ratios in chalcopyrite (e.g., Se/In) and, most importantly, pyrite (e.g., Ag/Co and Co/Cu) bear the potential for vectoring towards porphyry mineralization and higher Cu resources.

scholarly journals Continental growth histories revealed by detrital zircon trace elements: A case study from India

Geology ◽  
2018 ◽  
Vol 46 (3) ◽  
pp. 275-278 ◽  
Author(s):  
N. Ryan McKenzie ◽  
Andrew J. Smye ◽  
Venkatraman S. Hegde ◽  
Daniel F. Stockli
Keyword(s):  
Trace Elements ◽  
Detrital Zircon ◽  
Continental Growth ◽  
Zircon Trace Elements

scholarly journals The Geochemical and Zircon Trace Elements Characteristics of A-type Granitoids in Boziguoer, Baicheng County, Xinjiang

2013 ◽  
Vol 87 (6) ◽  
pp. 1585-1603 ◽  
Author(s):  
Chunhua LIU ◽  
Jingwu YIN ◽  
Cailai WU ◽  
Xingkun SHAO ◽  
Haitao YANG ◽  
...  
Keyword(s):  
Trace Elements ◽  
Zircon Trace Elements

scholarly journals A Comparative Study of Zircon Trace Elements in A-Type Granites: Indicators for Magma Fertility in Cu and Au Metallogenic Provinces

2020 ◽  
Author(s):  
Claire Wade ◽  
Justin Payne ◽  
Karin Barovich ◽  
Sarah Gilbert ◽  
Benjamin Wade ◽  
...  
Keyword(s):  
Trace Elements ◽  
Comparative Study ◽  
Zircon Trace Elements

scholarly journals Detrital zircon trace elements from the Mesozoic Jiyuan Basin, central China and its implication on tectonic transition of the Qinling Orogenic Belt

2019 ◽  
Vol 11 (1) ◽  
pp. 125-139 ◽  
Author(s):  
Min Wang ◽  
Wenfei Guo ◽  
Wentao Yang
Keyword(s):  
Trace Elements ◽  
Detrital Zircon ◽  
Middle Triassic ◽  
Tectonic Setting ◽  
Central China ◽  
Qinling Orogen ◽  
Tectonic Transition ◽  
Lithospheric Extension ◽  
Mountain System ◽  
Zircon Trace Elements

AbstractThe Qinling Orogen and the Jiyuan Basin constitute a basin-mountain system during the Early Mesozoic. Therefore, sediments from the Jiyuan Basin can be used to deduce the orogenic process of the Qinling Orogen. This paper attempts to use detrital zircon trace elements with ages ranging from the Late Carboniferous to the Middle Triassic that were obtained from the Jiyuan Basin to discuss the tectonic evolution of Qinling Orogen. On the tectonic setting discriminating diagrams, most grains are concentrated in convergent continental margins/orogenic settings,whereas the remaining samples (268 Ma, 265Ma, 264 Ma and 254Ma) are plotted in anorogenic field. Compared to the Early Paleozoic (400-500Ma) zircons, 306Ma and 281Ma grains represent higher Th/ Nb ratios, which might be related to the Mianlve oceanic crust subduction. The lower Th/Nb ratios containing 268 Ma, 265Ma, 264 Ma and 254Ma grains might indicate lithospheric extension subsequently. The final continent-continent collision between South China and North China blocks took place after the Middle Triassic (242Ma).

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