Lithospheric conductors reveal source regions of convergent margin mineral systems.

The clean energy transition will require a vast increase in metal supply, yet new mineral deposit discoveries are declining, due in part to challenges associated with exploring under sedimentary and volcanic cover. Recently, several case studies have demonstrated links between lithospheric electrical conductors imaged using magnetotelluric (MT) data and mineral deposits, notably Iron Oxide Copper Gold (IOCG). Adoption of MT methods for exploration is therefore growing but the general applicability and relationship with many other deposit types remains untested.

Application of multiscale magnetotelluric data to mineral exploration: an example from the east Tennant region, Northern Australia.

The footprint of a mineral system is potentially detectable at a range of scales and lithospheric depths, reflecting the size and distribution of its components. Magnetotellurics is one of a few techniques that can provide multiscale data sets to image and understand mineral systems. We have used long-period data from the Australian Lithospheric Architecture Magnetotelluric Project (AusLAMP) as a first-order reconnaissance survey to resolve large-scale lithospheric architecture for mapping areas of mineral potential in northern Australia.

Lower crustal resistivity signature of an orogenic gold system.

Orogenic gold deposits provide a significant source of the world's gold and form along faults over a wide range of crustal depths spanning sub-greenschist to granulite grade faces, but the source depths of the gold remains poorly understood. In this paper we compiled thirty years of long-period magnetotelluric (MT) and geomagnetic depth sounding (GDS) data across western Victoria and south-eastern South Australia that have sensitivity to the electrical resistivity of the crust and mantle, which in turn depend on past thermal and fluid processes. This region contains one of the world's foremost and largest Phanerozoic (440 Ma) orogenic gold provinces that has produced 2% of historic worldwide gold production.

[Study of voice changes pre- and post-tonsillectomy].

Objective: To evaluate changes in acoustic features of voice after tonsillectomy.

Method: Thirty-three patients presenting for tonsillectomy were recruited. Voice recordings obtained from patients before and 1 month after surgery, were analyzed using the Kay Elemetrics, multi-dimensional voice processing software.

[Effectiveness of voice training for professional voice users with voice disorders].

Objective: To explore the effectiveness of voice training on professional voice users with voice disorders.

Methods: Thirty one professional voice users suffering from voice symptoms without organic disorder were treated with a four-week voice training program, including vocal hygiene education, respiratory training and resonant therapy. Voice handicap index, maximum phonation time, noise to harmonic ratio, jitter and shimmer were compared before and after the training.

[Analysis of misdiagnosis and differential diagnosis of infectious mononucleosis in adults].

Objective: To explore the clinical characteristics of infectious mononucleosis (IM) in adults.

Method: Medical records of 50 adult IM patients admitted in hospital were analyzed retrospectively.

Result: Diagnosis delayed group contained 16 patients (32% of total patients) and was significantly different from the diagnosis in-time group in typical symptoms, signs and laboratory findings of IM.

The efficacy of a voice training program: a case-control study in China.

The objective of this study was to design a voice training program for Chinese speakers, and to evaluate its efficacy. It was a prospective, randomized, case-control study practiced in three middle schools in Beijing, China. Teachers in the treatment group received voice training for 4 weeks, whereas the control group subjects received no treatment.