Rhythms of Brazil

Brazil, a country famous for its music, glitter and Carnival, contains a large proportion of some of the planet’s largest natural resources: the vast rain-forests, the largest river system in the world and enormous mineral reserves.

Dancer at the Rio Carnival Although not on the same scale, Brazil also plays host to other interesting mineral deposits such as the carbonatite mineral intrusions in the Jacupiranga region in the state of Sao Paolo. The melt and fluid inclusions contained within these carbonatites can be used to calculate trapping pressures, which are indicative of the approximate depth of origin of the mineral vein in the earth’s crust.

Detailed analysis of carbonatites can yield characteristic information about the movement of tectonic plates. These plates are constantly shifting, as they have been doing for billions of years. This involves huge pressure, heat and power: see the amazing sequence here.

To understand the sequence Dr. Emma Salvioli-Mariani of the Università di Parma, Italy, has been characterising these carbonatites using a variety of techniques. Qualitative analysis of the small inclusions was performed using energy dispersive x-ray analysis in the SEM, whilst ICP and ICP-MS were used for major and trace element analysis from whole rock samples. Detailed thermometric analysis by studying the homogenization temperatures of inclusions was carried out using the Linkam THMS600 for temperatures up to 584°C, and the Linkam TS1500 up to 1194°C.

Carbonatite from Jacupiranga, Brazil. This rock is compound of calcite, magnetite and olivine

For the full story please refer to Dr. Salvioli-Mariani’s excellent paper:  “Late veins of C3 carbonatite intrusion from Jacupiranga complex (southern Brazil): fluid and melt inclusions and mineralogy”. 

Out of adversity comes an opportunity


 Thermo's DXR-Micro Raman with Linkam System

At 6.03 am on Sunday 11th December 2005, a huge blast at Buncefield fuel depot on the outskirts of Hemel Hempstead caused chaos and serious devastation to a lot of industries in the surrounding area, including the building that was home to the Thermo-Fisher-Scientific instrument group. The severity of the explosion caused irreparable damage, which gave Thermo-Fisher the opportunity to make a brand new state of the art facility from scratch and within 2 years, the new site was up and fully functional.

Around two weeks ago, Ian Pearce and I got the chance to experience this magnificent new building. The reason behind the visit was to get a firsthand look at the Thermo-Fisher DXR Micro Raman spectroscopy system and confirm compatibility with a few of our Linkam stages, namely the THMS600LTS420 and TS1500.

Linkam would like to thank Thermo-Fisher for the hospitality that was shown to us during the visit and also for reminding us all of the age old saying “out of adversity comes an opportunity”. 

Posted by Ricky Patel