Sulfide mineralogy of igneous basic rocks (ophites) from the external zone of the Betic Cordillera

被引：0

作者：

Gonzalez-Jimenez, Jose M. ^{[1
]}

Blanco-Quintero, Idael F. ^{[2
]}

Yesares, Lola ^{[3
]}

Marchesi, Claudio ^{[4
]}

Ferreira, Amira R. ^{[1
]}

Gonzalez-Perez, Igor ^{[4
]}

Schettino, Erwin ^{[5
]}

Cantizano, Francisco Abel Jimenez ^{[6
]}

Gervilla, Fernando ^{[4
]}

机构：

[1] CSIC, Inst Andaluz Ciencias Tierra IACT, Avda Palmeras 4, Armilla 18100, Granada, Spain

[2] Univ Alicante, Dept Ciencias Tierra & Medio Ambiente, Ciencias 3, Carretera San Vicente del Raspeig S-N, Alicante 03690, Spain

[3] Univ Complutense Madrid, Fac Ciencias Geol, Dept Mineral & Petrol, C Jose Antonio Novais 12,Ciudad Univ, Madrid 28040, Spain

[4] Univ Granada, Fac Ciencias, Dept Mineral & Petrol, Avda Fuentenueva S-N, Granada 18002, Spain

[5] Swiss Fed Inst Technol, Inst Geochem & Petrol, Clausiusstr 25, CH-8092 Zurich, Switzerland

[6] Junta Andalucia, Agencia Medio Ambiente & Agua, Seville 41092, Spain

来源：

EUROPEAN JOURNAL OF MINERALOGY | 2025年 / 37卷 / 02期

关键词：

NI-S SYSTEM; MONOSULFIDE SOLID-SOLUTION; PLATINUM-GROUP ELEMENTS; CU-PGE DEPOSIT; PHASE-RELATIONS; LOW-TEMPERATURE; FRACTIONAL CRYSTALLIZATION; HYDROTHERMAL FLUID; CRYSTAL-STRUCTURE; BUSHVELD COMPLEX;

D O I：

10.5194/ejm-37-191-2025

中图分类号：

P57 [矿物学];

学科分类号：

070901 ;

摘要：

The Triassic sedimentary rocks of the external zone of the Betic Cordillera in southern Spain host abundant igneous basic rocks ("ophites") metamorphosed in the greenschist facies. Investigation based on high-resolution transmission electron microscopy (HRTEM) reveals magmatic sulfides intimately intergrown with primary silicates (pyroxene, plagioclase and olivine), consisting of pyrrhotite (FeS to Fe7S8; monoclinic C2/c polytype 4C) and pentlandite ((FeNi)(9)S-8; cubic Fm3m), bounded by tetragonal I (4) over bar 2d chalcopyrite (CuFeS2). Whole-rock and clinopyroxene geochemical data suggest that Fe-Ni-Cu sulfides crystallized from melt droplets segregated by immiscibility from transitional-alkaline magmas, after their fractional crystallization and volatile oversaturation within crustal conduits developed during intraplate rifting. In contrast, hydrothermal sulfides are pyrite (FeS2) and/or chalcopyrite associated with secondary silicates (chlorite, epidote, saussurite, prehnite, sericite and quartz). Porous pyrite (cubic Pa3) hosts nanodomains of pyrrhotite (monoclinic C2/c polytype 4C and orthorhombic Cmca polytype 11C) and orthorhombic Pnnm marcasite (FeS2), evidencing disulfide formation via coupled Fe loss and S addition in pyrrhotite due to reaction with high-fS(2) and high-fO(2) fluids at < 300 degrees C. Tetragonal I<(4)over bar>2d chalcopyrite replacing pyrite also preserves nanodomains of pyrrhotite as well as of pyrite / marcasite, suggesting reaction of pre-existing Fe sulfides with Cu transported by low-temperature (similar to 200-100 degrees C) acidic-to-neutral fluids. Additionally, inclusions of sphalerite (ZnS), galena (PbS) and vaesite (NiS2) in pyrite and chalcopyrite spotlight metal remobilization during hydrothermal alteration, which is further confirmed by the crystallization of cobaltite coronas (CoAsS) around pyrite. Our new results contribute to the current debate of the full sequence of processes operating in ore-forming mafic systems.

引用

页码：191 / 220

页数：30

共 50 条

[41] U–Pb zircon data of Variscan meta-igneous and igneous acidic rocks from an Alpine shear zone in Calabria (southern Italy)
Francesca Micheletti
Annamaria Fornelli
Giuseppe Piccarreta
Massimo Tiepolo
International Journal of Earth Sciences, 2011, 100 : 139 - 155
[42] Lower Miocene deformation in the hanging wall of the Internal-External Zone boundary of the Betic Cordillera:: deformation at the edges of vertical-axis rotation domains in oblique convergent margins
Fernández-Fernández, E
Jabaloy, A
González-Lodeiro, F
VERTICAL COUPLING AND DECOUPLING IN THE LITHOSPHERE, 2004, 227 : 249 - 277
[43] SILICATE MINERALOGY OF THE MIDDLE ZONE CUMULATES AND ASSOCIATED GABBROIC ROCKS FROM THE INSCH INTRUSION, NE SCOTLAND
WADSWORTH, WJ
MINERALOGICAL MAGAZINE, 1988, 52 (366) : 309 - 322
[44] ON HIGH-IRON MONTMORILLONITES - DISCUSSION OF SIGNIFICANCE OF MAGNESIUM AND IRON IN MONTMORILLONITE FORMATION FROM BASIC IGNEOUS ROCKS
YAALON, DH
SOIL SCIENCE, 1970, 110 (01) : 74 - &
[45] Influence of engineering properties on Polished Stone Value (PSV): A case study on basic igneous rocks from Serbia
Dokic, Olivera
Matovic, Vesna
Eric, Suzana
Saric, Kristina
CONSTRUCTION AND BUILDING MATERIALS, 2015, 101 : 1088 - 1096
[46] U-Pb zircon data of Variscan meta-igneous and igneous acidic rocks from an Alpine shear zone in Calabria (southern Italy)
Micheletti, Francesca
Fornelli, Annamaria
Piccarreta, Giuseppe
Tiepolo, Massimo
INTERNATIONAL JOURNAL OF EARTH SCIENCES, 2011, 100 (01) : 139 - 155
[47] Microbial encrustations from the Middle Oxfordian-earliest Kimmeridgian lithofacies in the Prebetic Zone (Betic Cordillera, southern Spain):: characterization, distribution and controlling factors
Reolid, M
Gaillard, C
Olóriz, F
Rodríguez-Tovar, FJ
FACIES, 2005, 50 (3-4) : 529 - 543
[48] Microbial encrustations from the Middle Oxfordian-earliest Kimmeridgian lithofacies in the Prebetic Zone (Betic Cordillera, southern Spain): characterization, distribution and controlling factors
Matías Reolid
Christian Gaillard
Federico Olóriz
Francisco J. Rodríguez-Tovar
Facies, 2005, 50 : 529 - 543
[49] The Lamandau IOCG deposit, southwestern Kalimantan Island, Indonesia: Evidence for its formation from geochronology, mineralogy, and petrogenesis of igneous host rocks
Li, Shuang
Yang, Xiaoyong
Sun, Weidong
ORE GEOLOGY REVIEWS, 2015, 68 : 43 - 58
[50] Trace elements and lead isotopic composition of copper deposits from the eastern part of the Internal Zone of the Betic Cordillera (SE Iberia): application to provenance of archaeological materials
M. Murillo-Barroso
I. Montero-Ruiz
J. M. Nieto
M. D. Camalich Massieu
D. Martín Socas
M. Martinón-Torres
Journal of Iberian Geology, 2019, 45 : 585 - 608

← 1 2 3 4 5 →