The Productora prospect is situated 15 km SSW of the town of Vallenar in the Third Region, north-central Chile. It lies within the "Chilean Iron Belt" close to the north-trending Atacama Fault system. The belt contains a variety of Fe oxide ±Cu ±Au-bearing deposits including Candelaria (366 million tonnes averaging 1.08 % Cu, 0.26 g/t Au) which is situated in the Punta del Cobre region approximately 150 km north of Productora. The age, structural setting, alteration assemblages and styles of mineralisation in the Productora area resemble those present at Candelaria, but Productora differs in its spatial association with intrusive rocks and its lack of skarn assemblages.

The dragon blinked in the fierce light of the sun as it emerged from the clouds and banked hard, its tremendous wings arching under the load. Reflected in a massive dark eye, the world below slowly tilted into view. Vast herds of dinosaurs were strung out across a dusty yellow-orange plain, occasionally gathered in knots where they had stopped to feed on patches of stunted vegetation. Then came marshes and— the dragon focused— a long, still, clear-blue lake.

Geology, Geochemistry, and Natural Abundances of the Rare Earth Elements

Sustainability of Rare Earth Resources

The Electronic Structure of the Lanthanides

Variable Valency

Group Trends

Solvento Complexes of the Lanthanide Ions

Lanthanides in Living Systems

Lanthanides: Coordination Chemistry

Organometallic Chemistry Fundamental Properties

Lanthanides: ‘‘Comparison to 3d Metals’’

Luminescence

Lanthanides: Luminescence Applications

Magnetism

The Divalent State in Solid Rare Earth Metal Halides

Lanthanide Halides

Lanthanide Oxide/Hydroxide Complexes

Lanthanide Alkoxides

Rare Earth Siloxides

Thiolates, Selenolates, and Tellurolates

Carboxylate

Lanthanide Complexes with Amino Acids

β-Diketonate

Rare Earth Borides, Carbides and Nitrides

Lanthanide Complexes with Multidentate Ligands

Alkyl

Aryls

Trivalent Chemistry: Cyclopentadienyl

Tetravalent Chemistry: Inorganic

Tetravalent Chemistry: Organometallic

Molecular Magnetic Materials

Near-Infrared Materials

Superconducting Materials

Metal–Organic Frameworks

Upconversion Nanoparticles for Bioimaging Applications

Oxide and Sulfide Nanomaterials

Rare Earth Metal Cluster Complexes

Organic Synthesis

Homogeneous Catalysis

Heterogeneous Catalysis

Supramolecular Chemistry: from Sensors and Imaging Agents to Functional Mononuclear and Polynuclear Self-Assembly Lanthanide Complexes

Endohedral Fullerenes

Lanthanide Shift Reagents

Lanthanides: Magnetic Resonance Imaging

Luminescent Bioprobes

Sensors for Lanthanides and Actinides

The Relief Canyon gold deposit in the Humboldt Range of western Nevada is a low-grade, high-tonnage orebody of Tertiary or younger age. The host rocks include limestones of the Triassic Cane Spring Formation, which are overlain by shales of the Triassic Grass Valley Formation. The rocks were folded and metamorphosed to greenschist grade during Jurassic and Cretaceous regional tectonic activity. Mesozoic thrusting may have occurred along the shale-limestone contact, but evidence has been obscured by later hydrothermal activity. The sedimentary rocks were nominally offset along several Late Tertiary normal faults related to uplift of the range.